3-Phase Power Stage
with DC/DC Inverter Lite
User’s Manual
56800
Hybrid Controller
TPPSDDILUM
Rev. 0
3/2006
freescale.com
3-Phase Power Stage with DC/DC Inverter Lite
User’s Manual
To provide the most up-to-date information, the revision of our documents on the World Wide Web will be
the most current. Your printed copy may be an earlier revision. To verify you have the latest information
available, refer to:
http://www.freescale.com
The following revision history table summarizes changes contained in this document. For your
convenience, the page number designators have been linked to the appropriate location.
Revision History
Date
Revision
Level
March,
2006
0
Description
Initial release
Page
Number(s)
N/A
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
Freescale Semiconductor
3
Revision History
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
4
Freescale Semiconductor
Table of Contents
Chapter 1
Introduction and Setup
1.1
1.2
1.3
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
About this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Setup Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Chapter 2
Operational Description
2.1
2.2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Chapter 3
Pin Descriptions
3.1
3.2
3.2.1
3.2.2
3.2.3
3.2.4
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Signal Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
J206 Input Power Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
J201 UNI-3 40-Pin Ribbon Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
J202 Motor Power Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
J217 DC/DC Inverter Output Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15
15
15
15
19
19
Chapter 4
Schematics
4.1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2
Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.1
Power and Motor Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.2
Test Points and LED Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.3
UNI-3 Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.3.1
Changes to Standard UNI-3 Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.4
Ground Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.5
Power Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.6
MOSFET Pre-driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.7
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.7.1
+15V Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.7.2
+5V Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.7.3
+3.3V Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.7.4
+2.5V Reference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.7.5
+1.65V Reference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.7.6
+0.2V Reference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.8
Analog Signals Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.8.1
Input Power Voltage Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.8.2
DC/DC Inverter Output Voltage Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21
21
21
21
22
22
24
24
25
28
28
28
29
29
30
30
30
31
31
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
Freescale Semiconductor
5
Table of Contents
4.2.8.3
3-phase Inverter Current Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.2.8.4
BEMF Voltage Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.3
Motor Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Appendix A
Bill of Materials
Appendix B
PCB
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
6
Freescale Semiconductor
Chapter 1
Introduction and Setup
1.1 Introduction
Freescale Semiconductor’s 3-Phase Power Stage with DC/DC Inverter Lite is a 12V – 42V, 10A power
stage integral to Freescale Semiconductor’s embedded motion control series of development tools. It
provides a power stage to control 3-Phase BLDC, PMSM and ACIM motors operating at voltages ranging
up to 42V. It is supplied with a 40-pin ribbon cable, interconnecting with, among others, one of the
embedded motion control series control or evaluation boards, providing a ready-made software
development platform for small brushless DC motors. A new feature, different from the usual 3-phase
power stage, consists of a DC/DC step-down inverter. This inverter is capable of reducing the voltage
level and can even brake the motor by transferring energy to the higher voltage input side. An illustration
of system configurations is delineated in Figure 1-1. Figure 1-2 is an illustration of the board.
1.2 About this Manual
Key items can be found in the following locations in this manual:
• Setup instructions are found in 1.3 Setup Guide.
• Schematics and board circuitry description are found in 4.2 Schematics.
• Pin assignments are shown in Figure 3-1, and a pin-by-pin description is contained in 3.2 Signal
Descriptions.
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
Freescale Semiconductor
7
Introduction and Setup
CONTROLLER
BOARD
MMDS08
CONTROLLER
BOARD
WORKSTATION
WORKSTATION
3-PH. POWER
STAGE WITH DC/DC
INVERTER LITE
3-PH. POWER
STAGE WITH DC/DC
INVERTER LITE
MOTOR
MOTOR
OPTIONAL FEEDBACK
OPTIONAL FEEDBACK
a) MC68HC08 MICROCONTROLLER
b) MCF523xEC, MPC555, 56800/E HYBRID CONTROLLER, S12Exx MICROCONTROLLER
Figure 1-1. System Configurations
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
8
Freescale Semiconductor
About this Manual
Figure 1-2. 3-Phase Power Stage with DC/DC Inverter Lite
WARNING
The 3-Phase Power Stage with DC/DC Inverter Lite includes power
components able to reach temperatures hot enough to cause burns.
For safe operation, the 12V – 42V input power should come from a DC
laboratory power supply current-limited to less than 10A.
Before moving scope probes, making connections, etc., it is
advisable to power down the 12V – 42V supply.
Operation in lab setups with grounded tables and/or chairs should be
avoided.
Also advisable: wear safety glasses; avoid wearing ties and jewelry;
use shielding; and operate only by personnel trained in power
electronics lab techniques.
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
Freescale Semiconductor
9
Introduction and Setup
1.3 Setup Guide
Setup and connections for the 3-Phase Power Stage with DC/DC Inverter Lite are straightforward. The
3-Phase Power Stage with DC/DC Inverter Lite connects to a Freescale Semiconductor embedded
motion control series control board via a 40-pin ribbon cable. The motor’s power leads plug into output
connector J206, and its Hall sensors or encoder plug into the control board’s Hall sensor/encoder input
connector. Figure 1-3 depicts a complete setup.
Follow these steps to set up the board:
1. Plug one end of the 40-pin ribbon cable (supplied with Freescale Semiconductor embedded motion
control series control boards) into the input connector J201, located at the edge of the board. The
other end of this cable goes to the control board’s 40-pin output connector.
2. Plug the free end of the cable connected to the input connector J201 into the control board’s 40-pin
connector.
3. Jumper configuration is required to be able to use the 3-Phase Power Stage with DC/DC Inverter
Lite. JP501 and JP502 must be closed to provide the +5V and +15V supply. JP401 must be set up
according to whether the MOSFET pre-drivers should be enabled/disabled using a UNI-3 signal
and/or whether it should be permanently turned on. See Table 1-1 for details.
4. Connect a 12V – 42V DC power supply to the power jack J206. This connector is located in a
corner of the 3-Phase Power Stage with DC/DC Inverter Lite. The input power supply should be
rated for at least 5A and should have its current limit set to 10A depending on needs.
5. If protection features are desired, set the control board’s overcurrent and overvoltage detection
comparators according to your needs. These values limit the DC bus current and voltage. For the
current, 1.65V corresponds to 0A, and 3.3V corresponds to 14.025A. Regarding voltage, 0.2V
corresponds to 0V, and 3.3V corresponds to 47.5V.
6. Apply power to the 3-Phase Power Stage with DC/DC Inverter Lite. The green power-on LEDs
D205 (+15V) and D206 (+5V) are lit when power is present.
Table 1-1. 3-phase Power Stage with DC/DC Inverter Lite Jumper Options
#
Function
Connections
Pre-driver enabled by the UNI-3 signal
2-3
Pre-driver permanently enabled
1-2
+5V voltage generation enabled
closed
+5V voltage generation disabled
open
+15V voltage generation enabled
closed
+15V voltage generation disabled
open
JP401
JP501
JP502
CAUTION
Do not enable the +15V generation on the 3-Phase Power Stage with
DC/DC Inverter without enabling the + 5V generation. The gate signals
use buffers to be converted from the 3.3V to the 5V logic. As the brake
resistance pre-driver is always enabled the absence of +5V could turn
on the brake resistance.
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
10
Freescale Semiconductor
Setup Guide
Motor
BLDC
Motor
Motor
Phases
Hall
Sensors
Encoder
A
J202
3-ph. Power Stage with
DC/DC Inverter Lite
J206
Controller Board
J201
UNI-3
Jack 2.1mm
Power Input
RS232
12-42V
Figure 1-3. 3-Phase Power Stage with DC/DC Inverter Lite Setup
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
Freescale Semiconductor
11
Introduction and Setup
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
12
Freescale Semiconductor
Chapter 2
Operational Description
2.1 Introduction
Freescale Semiconductor’s embedded motion control series 3-Phase Power Stage with DC/DC Inverter
Lite is a 12V – 42V, 10A, surface-mounted power stage. In combination with one of the embedded motion
control series control boards, it provides a software development platform allowing algorithms to be
written and tested without the need to design and build a power stage. It supports algorithms using Hall
sensors, an encoder and back electromotive force (EMF) signals for sensorless control.
The 3-Phase Power Stage with DC/DC Inverter Lite does not have any overcurrent protection
independent of the control board; therefore, it must be set up and used with care, when driving low
impedance motors. The current measuring circuitry is set up for ±14.025A full scale. At ambient
temperature (25°C), the board will remain within thermal limits when operating with output currents up to
9A continuous RMS (12A for 10 seconds).
Input connections are made via the 40-pin ribbon cable connector J201. Pin assignments for the input
connector are illustrated in Figure 3-1. Power connections to the motor are made on a 3-way output
connector J202. Phases A and B are labeled on the board. The input current requirements are met by a
single DC power supply capable of supplying 5A. However, it is recommended to use a more powerful
power supply. The voltage requirements are met by a power supply of 12V – 42V. The voltage should be
within these limits. The board sustains a voltage of at least 9V with a maximum of 50V. The input power
is supplied by means of a 2.1mm jack connector J206.
A summary of the information required to use the 3-Phase Power Stage with DC/DC Inverter Lite follows.
For design information, see Chapter 4 Schematics.
2.2 Electrical Characteristics
The electrical characteristics in Table 2-1 apply to operation at 25°C.
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
Freescale Semiconductor
13
Operational Description
Table 2-1. Electrical Characteristics
Characteristic
Symbol
Min
Typ
Max
Units
Power Supply Voltage
VDC
9
12, 24, 42
50
V
Quiescent Current(1)
ICC
—
1.7
—
mA
ICC5V
—
4.8
—
mA
Quiescent Current: +15V Generation on
ICC15V
—
5.9
—
mA
Quiescent Current: +5V, +15V Generation on(1)
ICCSPL
—
8.9
—
mA
Quiescent Current: +5V, +15V, Drivers On Signal(1)
ICCALL
—
30.0
—
mA
Min Logic 1 Input Voltage
VIH
2.4
—
—
V
Max Logic 0 Input Voltage
VIL
—
—
0.8
V
Input Logic Resistance
RIn
—
4.7
—
kΩ
Analog Output Range
VOut
0
—
3.3
V
Bus Current Sense Voltage
ISense
—
118
—
mV/A
Bus Current Sense Offset
Ioffset
Bus Voltage Sense Voltage
VBus
Quiescent Current: +5V Generation on(1)
(1)
Bus Voltage Sense Offset
1.65
—
VOFFSET
Power MOSFET On Resistance
153
V
—
0.2
mV/V
V
RDS(On)
0.25
0.85
1.4
mΩ
ID
—
9
12
A
Pulsed Output Current
IDM
—
—
50
A
Total Power Dissipation (per MOSFET)(2)
PD
—
1.85
3.75
W
tOFF
200
400
—
ns
(2)
Continuous Output Current
Required Deadtime (generated by processor)
1. Measured with an input power of 24V.
2. The values are measured at 25°C. Values may differ for other temperatures.
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
14
Freescale Semiconductor
Chapter 3
Pin Descriptions
3.1 Introduction
Inputs and outputs are located on four connectors available on the board:
• 40-pin UNI-3
• 3-pin motor power
• 2.1mm jack type power Input
• 2-pin DC/DC inverter output
Pin descriptions for each of these connectors are provided and test points identified in the following
sections. Pin assignments for the UNI-3 connectors are illustrated in Figure 3-1. Signal descriptions are
provided in Table 3-1 through Table 3-2.
3.2 Signal Descriptions
Pin descriptions are identified in this subsection.
3.2.1 J206 Input Power Connector
Connector J206 is provided for the 12V – 42V power supply. This connector is a 2.1mm power jack for
plug-in type 12V – 42V power supply connections. The power supply should be able to deliver at least 5A.
3.2.2 J201 UNI-3 40-Pin Ribbon Connector
Signals are grouped together on the 40-pin ribbon cable connector, J201, located at the edge of the
board. Pin assignments are shown in Figure 3-1. Pin descriptions are listed in Table 3-1.
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
Freescale Semiconductor
15
Pin Descriptions
Table 3-1. The J201 Connector Signal Descriptions
Pin
No.
Signal Name
1
PHA_T
2
Shielding
Connected to a shield wire in the ribbon cable and ground on the board.
3
PHA_B
The non-inverting gate drive signal for the bottom half-bridge of phase A.
4
Shielding
Connected to a shield wire in the ribbon cable and ground on the board.
5
PHB_T
6
Shielding
Connected to a shield wire in the ribbon cable and ground on the board.
7
PHB_B
The non-inverting gate drive signal for the bottom half-bridge of phase B.
8
Shielding
Connected to a shield wire in the ribbon cable and ground on the board.
9
PHC_T
10
Shielding
Connected to a shield wire in the ribbon cable and ground on the board.
11
PHC_B
The non-inverting gate drive signal for the bottom half-bridge of phase C.
12
GND
Digital power supply ground
13
GND
Digital power supply ground, redundant connection
14
+5V
+5V digital output, supplied from this board
15
+5V
+5V digital output, supplied from this board
16
+3.3V_A
17
GNDA
Analog power supply ground
18
GNDA
Analog power supply ground, redundant connection
19
+15V
Low current +15-volt output, supplied from this board
20
NC
21
S_VDCDC
22
S_I_DCBUS
23
NC
24
+1.65V_REF
+1.65V reference for current sensing offset.
25
+0.2V_REF
+0.2V reference for voltage sensing offset.
26
S_VPWR
27
NC
28
Shielding_A
29
BRAKE
30
NC
Description
The non-inverting gate drive signal for the top half-bridge of phase A.
The non-inverting gate drive signal for the top half-bridge of phase B.
The non-inverting gate drive signal for the top half-bridge of phase C.
+3.3V analog output, supplied from this board
No connection
The analog sensing signal measuring DC bus voltage at the DC/DC inverter output. It is
scaled at 0.065 volts per volt of DC bus voltage and shifted by 0.2V.
The analog sensing signal that measures DC bus current. It is scaled at 0.118 volts per amp
of DC bus current and shifted by 1.65V
No connection.
The analog sensing signal measuring power input voltage at the DC/DC inverter input. It is
scaled at 0.065 volts per volt of DC bus voltage and shifted by 0.2V.
No connection
Pin 28 is connected to a shield wire in the ribbon cable, and ground to the analog ground on
the board.
The non-inverting gate drive signal controlling the brake resistance at the DC/DC inverter
input.
No connection
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
16
Freescale Semiconductor
Signal Descriptions
Table 3-1. The J201 Connector Signal Descriptions (Continued)
Pin
No.
Signal Name
31
DCDC_T
The non-inverting gate drive signal for the top half-bridge of the DC/DC inverter. Creates
voltage at the output of the DC/DC inverter, step-down.
32
DRV_EN
The non-inverting signal controlling the MOSFET pre-drivers on/off state. Can be overridden
by the on-board jumper to permanently turn on the pre-drivers. (This signal is not applied to
the brake resistance pre-driver, i.e., if +15V is present the brake resistance driver is ready to
operate.)
33
DCDC_B
The non-inverting gate drive signal for the bottom half-bridge of the DC/DC inverter. Brakes
the output of the DC/DC inverter by transforming the energy to the input of the DC/DC
inverter.
34
NC
No connection
35
NC
No connection
36
NC
No connection
37
Shielding_A
Connected to a shield wire in the ribbon cable and ground to the analog ground on the board.
38
S_BEMF_PHA
The analog sensing signal measuring phase A back EMF. It is scaled at 0.065 volts per volt
of DC bus voltage and NOT shifted by 0.2V.
39
S_BEMF_PHB
The analog sensing signal measuring phase B back EMF. It is scaled at 0.065 volts per volt
of DC bus voltage and NOT shifted by 0.2V.
40
S_BEMF_PHC
The analog sensing signal measuring phase C back EMF. It is scaled at 0.065 volts per volt
of DC bus voltage and NOT shifted by 0.2V.
Description
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
Freescale Semiconductor
17
Pin Descriptions
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
S_BEMF_PHC
S_BEMF_PHB
S_BEMF_PHA
Shielding_A
NC
NC
NC
DCDC_B
DRV_EN
DCDC_T
NC
BRAKE
Shielding_A
NC
S_VPWR
+0.2V_REF
+1.65V_REF
NC
S_I_DCBUS
S_VDCDC
NC
+15V
GNDA
GNDA
+3.3V_A
+5V
+5V
GND
GND
PHC_B
Shielding
PHC_T
Shielding
PHB_B
Shielding
PHB_T
Shielding
PHA_B
Shielding
PHA_T
PHA_T
PHA_B
PHB_T
PHB_B
PHC_T
PHC_B
GND
+5V
GNDA
+15V
S_VDCDC
NC
+0.2V_REF
NC
BRAKE
DCDC_T
DCDC_B
NC
Shielding_A
S_BEMF_PHB
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
Shielding
Shielding
Shielding
Shielding
Shielding
GND
+5V
+3.3V_A
GNDA
NC
S_I_DCBUS
+1.65V_REF
S_VPWR
Shielding_A
NC
DRV_EN
NC
NC
S_BEMF_PHA
S_BEMF_PHC
PHYSICAL VIEW
SCHEMATIC VIEW
Figure 3-1. 40-Pin Connector J201
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
18
Freescale Semiconductor
Signal Descriptions
3.2.3 J202 Motor Power Connector
The board contains a 3-way connector, J202. A pin description of this J202 connector is provided in
Table 3-2.
Table 3-2. The J202 Connector Signal Descriptions
Pin No.
Signal Name
Description
1
Phase_A
Phase_A supplies power to motor phase A
2
Phase_B
Phase_B supplies power to motor phase B
3
Phase_C
Phase_C supplies power to motor phase C
3.2.4 J217 DC/DC Inverter Output Connector
The board contains a 2-way connector (J217) connected to the DC/DC inverter output. This connector is
only an auxiliary for testing and tuning purposes. A pin description of the J202 connector is provided in
Table 3-3.
Table 3-3. The J217 Connector Signal Descriptions
Pin No.
Signal Name
1
V_DCDC
2
GND_PWR
Description
DC/DC inverter output voltage
Power ground
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
Freescale Semiconductor
19
Pin Descriptions
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
20
Freescale Semiconductor
Chapter 4
Schematics
4.1 Overview
Schematics for the 3-Phase Power Stage with DC/DC Inverter Lite are provided in this chapter.
Unless otherwise specified, resistor values are in ohms (Ω), resistors are specified as 1/8W ±5%, and
interrupted lines coded with the same letters are electrically connected.
4.2 Schematics
The schematics for the evaluation motor board appear on the following pages.
4.2.1 Power and Motor Connection
The 3-Phase Power Stage with DC/DC Inverter Lite contains several connectors for the power supply and
motor phases.
The input power supply must not be less than 9V nor higher than 50V. There is a 2.1mm jack connector
(J206) for the power supply connection.
The output for the motor is achieved via a 3-way connector (J202). See Figure 4-1 for more details.
The output of the DC/DC inverter is connected to the J217 connector.
V_PWR
J202
3-ph. Output
1
3
2
1
2
Phase_A
Phase_B
Power 12-42V
12-42V
J217
V_DCDC
1
2
3
J206
GND_PWR
DC/DC Output
Phase_C
GND_PWR
Figure 4-1. Power and Motor Connection
4.2.2 Test Points and LED Indication
The 3-Phase Power Stage with DC/DC Inverter Lite contains eight test points to allow easy voltage
checks at important points:
• GND_PWR – the power ground is connected to the power supply. All other grounds are derived
from this ground.
• GND – the digital ground for ICs connected to the UNI-3 connector. This ground is connected to
the GND_PWR through R219.
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
Freescale Semiconductor
21
Schematics
•
•
•
•
•
GNDA – the analog ground serves for the analog sensing and is connected to the UNI-3 connector.
It is connected to the GND through R220.
V_PWR – this point is connected to the power supply positive terminal. All other voltage levels are
derived from this point.
V_DC/DC – this point is found at the output of the DC/DC inverter and the input to the 3-phase
inverter.
+15V – this point is the output of the U505 switching regulator. It serves the U401 and U402
MOSFET pre-drivers and is connected to the UNI-3 connector too.
+5V – this point is the output of the U501 switching regulator. It serves as the power supply for other
ICs and is connected to the UNI-3 connector. It is also used for analog 3.3V generation.
This board also contains three LEDs as indicated:
• D205 – indicates the +15V level was properly generated.
• D206 – indicates the +5V level was properly generated.
• D207 – indicates the U401 and U402 MOSFET pre-drivers are turned on.
For more details see Figure 4-2.
J209
GND
J210
GND_PWR
J212
GNDA
+15V
+5V
Driver_EN
R216
3k
GND_PWR
GND
J213
V_PWR
J214
V_DCDC
D206
+5V
D207
DRV_EN
J216
+5V
Green
Led
V_DCDC
R218
1k
GNDA
J215
+15V
D205
+15V
V_PWR
R217
1k
+15V
+5V
GND_PWR
Green
Led
GND
Yellow
LED
GND
Figure 4-2. Test Points and LED Indication
4.2.3 UNI-3 Connector
The J201 UNI-3 connector serves for interconnection with a controller or EVM board. Its connection is
illustrated in Figure 4-3.
4.2.3.1 Changes to Standard UNI-3 Connection
The 3-Phase Power Stage with DC/DC Inverter Lite board does not use the standard UNI-3 interface. It
does bring a few UNI-3 signals changes. One signal change is in DC bus voltage sensing. Pin 21 does
not sense the board power supply voltage as in the standard UNI-3, but senses the voltage at the DC/DC
inverter output and the 3-phase inverter input. The board power supply sensing is connected to pin 26
(instead of the standard temperature sensing).
This board does not have phase currents measurement signals in the standard UNI-3. Instead, pin 25
provides a 0.2V voltage offset reference, and pin 24 provides a 1.65V current offset reference. The
remaining pin 23 is unconnected.
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
22
Freescale Semiconductor
Schematics
Pins 31 and 33 originally aimed for PFC control are used for the DC/DC inverter control where pin 31
controls the DC/DC inverter top switch. Pin 32 controls the bottom switch.
Pin 32 enables or disables the MOSFET pre-drivers for the DC/DC inverter and the 3-phase inverter. The
brake MOSFET pre-driver is permanently turned on if a +15V voltage is present.
The serial communication pin 30 is not connected.
The -15V (-12V) pin 20 is not connected.
The +5V analog voltage supply pin 16 provides a +3.3V level instead.
The +15V pin 19, the +5V pins 14 and 15, and the +3.3V pin 16 are connected by means of 0Ω resistors
R201, R202, and R203 for possible disconnection in case it is desired to supply the controller or EVM
board independently.
See Figure 4-3 for more details.
J201
S_BEMF_PHC
S_BEMF_PHB
S_BEMF_PHA
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
DCDC_B
DRV_EN
DCDC_T
BRAKE
R221 10R 1%
S_VPWR
+0.2V_REF
+1.65V_REF
R222 10R 1%
S_I_DCBUS
S_VDCDC
R223 10R 1%
C223
33nF
6.3V
R201 0R
C222
33nF
6.3V
+15V
C221
33nF
6.3V
+3.3V_A
+5V
R203 0R
R202 0R
GNDA
PHC_B
PHC_T
PHB_B
PHB_T
PHA_B
PHA_T
UNI-3
GND
Figure 4-3. UNI-3 Connector
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
Freescale Semiconductor
23
Schematics
4.2.4 Ground Connection
As previously mentioned, the 3-Phase Power Stage with DC/DC Inverter Lite board contains more ground
points. These grounds are connected into one point by means of 0Ω resistors in a 0805 case (see
Figure 4-4). Where necessary, remove these resistors to disconnect the grounds or to replace them with
other components.
R219 0R0
GND_PWR
R220 0R0
GND
GNDA
Figure 4-4. Ground Connection
4.2.5 Power Components
The 3-Phase Power Stage with DC/DC Inverter Lite is composed of a 3-phase inverter designed to drive
a 3-phase motor output and a step-down DC/DC inverter (see Figure 4-5). This board uses either two
DPAK N-channel MOSFETs or two TO-220 N-channel MOSFETs, depending on the BOM. In the case of
the TO-220, a heatsink can be mounted if required.
The DC/DC inverter serves to decrease the voltage level, i.e., it can control its output from 0V to the input
power supply voltage level. Its output is controlled by switching the Q309 MOSFET – the PFC_PWM pin
31 of the J201 UNI-3 connector. Thus, the inverter uses the L301 inductor and the C306 capacitor to keep
desired output voltage level. The L301 inductor footprint contains two types of inductor shape in order to
to select from more inductors. The two basic types used are:
• Coilcraft PCV2-564-06 – 560µH, 6A
• Coilcraft PCV1-394-05 – 390µH, 5A
The inductor should be within the range of 250 – 600µH according to the desired current rippling and the
inverter response. Current is another criteria for inductor selection.
This DC/DC inverter can also work in the opposite direction, i.e., if we want to brake the load and transfer
its energy to the power supply’s input voltage level. To reduce the load voltage level, the Q304 MOSFET
is used – the PFC_z_c pin 33 of the J201 UNI-3 connector. Therefore, if this MOSFET is turned on, the
L301 inductor is charged, and in the instant when the MOSFET is turned off the energy accumulated in
the inductor is transferred to the DC/DC inverter’s input. This temporarily causes a higher voltage at the
board input. If this operation goes on longer, the input capacitors does not absorb all the energy and the
input voltage is higher. In this case, care must be taken and the Q305 brake MOSFET must be turned on
while the voltage is higher. Voltage must not go higher than 50V. The brake resistors are designed to
absorb the power of 10W. When insufficient, these resistors must be replaced by resistors with a higher
rating.
The Q304 MOSFET operates in a different way to the Q309, i.e., whereas the Q309 can be switched from
0 – 100% of the duty cycle, the Q304 cannot. It can only be switched from 0 to a certain percentage
because the inductor is discharged when the MOSFET is turned off. This maximum duty cycle depends
on the voltages both at the input and at the output.
The DC/DC inverter can be bypassed by the J201 short-circuit jumper.
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
24
Freescale Semiconductor
Schematics
The 3-phase inverter (see Figure 4-6) is connected to the output of the DC/DC inverter. It contains six
N-channel MOSFETs controlled by the UNI-3 pins 1, 3, 5, 7, 9, and 11. The MOSFETs must be switched
properly to avoid hardware damage. At least 200ns of deadtime must be inserted.
The 3-phase inverter contains a shunt resistor for current sensing. The shunt has a dual footprint, i.e., one
can populate it with an Isabellenhutte PMA SMD resistor and/or a Vishay VLR-3 TH resistor. The PMA
resistor contains special terminals for precise measurement and the TH resistor output is led from its
terminals. If the TH is used the R329 and R330 0Ω resistors must be populated, otherwise they must be
left vacant. See Figure 4-6 and Figure 4-16.
V_PWR
R306
10R
5W
R307
10R
5W
MBRM140T3G
D303
SS16T3
Gate_DCDCT
NTD3055-94/NTP75N06G
Q309
D301
+
R303 10R
C304
C303
+
D310
1PMT5930BT1G
16V/1W
5
6
7
8
C302
C301
R302 6.8R
+
Q305
Si4470EY
V_DCDC
250-500uH
3-10A
100nF 50V C305
MBRM140T3G
Gate_DCDCB
NTD3055-94/NTP75N06G
Q304
D302
R304 3.3R
R305 10R
+
47uF 50V C306
50V
100nF
50V
50V
2200uF
3
2
1
2200uF
R328 10R
2200uF
50V
4
Gate_Brake
L301
SRC_DCDC
GND_PWR
GND_PWR
V_DCDC
2
1
V_PWR
JP301
DCDC+Short
Figure 4-5. DC/DC Inverter
V_DCDC
Gate_PHBT
Gate_PHCT
D306
D308
D313
1PMT5930BT1G
16V/1W
SRC_PHB
Phase_B
MBRM140T3G
5
6
7
8
MBRM140T3G
Gate_PHAB
3
2
1
D309
4
R317 6.8R
Q302
Si4470EY
R318 10R
3
2
1
Q301
Si4470EY
R314 10R
Phase_C
Gate_PHCB
D307
4
R313 6.8R
SRC_PHC
MBRM140T3G
Gate_PHBB
D305
Q308
Si4470EY
R320 10R
3
2
1
D312
1PMT5930BT1G
16V/1W
Phase_A
R319 3.3R
5
6
7
8
SRC_PHA
4
Q307
Si4470EY
R316 10R
3
2
1
R315 3.3R
3
2
1
D311
1PMT5930BT1G
16V/1W
100nF 50V C311
4
Q306
Si4470EY
R312 10R
5
6
7
8
4
R311 3.3R
4
R321 6.8R
Q303
Si4470EY
R322 10R
3
2
1
D304
5
6
7
8
MBRM140T3G
5
6
7
8
MBRM140T3G
5
6
7
8
MBRM140T3G
Gate_PHAT
R327
R329
0R
sense
GND_PWR
sense
0.040R 1%
R330
0R
I_Sense2
I_Sense1
Figure 4-6. 3-phase Inverter
4.2.6 MOSFET Pre-driver
The 3-Phase Power Stage with DC/DC Inverter Lite contains two Freescale Semiconductor MC33883
pre-drivers and one MAX628 MOSFET pre-driver. The MC33883 is a full-bridge pre-driver able to work
up to 55V. This board contains two MC33883 ICs – U401 and U402 (see Figure 4-7). One half of the U401
is dedicated to the DC/DC inverter while the other half is dedicated to phase A of the 3-phase inverter.
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
Freescale Semiconductor
25
Schematics
The U402 drives the B and C phases of the 3-phase inverter. This driver must be enabled in order to be
able to drive the MOSFETs. It is controlled by the UNI-3 pin 32 and/or it can be permanently enabled by
moving the JP401 jumper to the 1-2 position (see Figure 4-8). If the drivers are enabled, the D207 LED
is lit.
The MAX628 is a dual MOSFET pre-driver of up to 18V. This board uses its non-inverting channel to drive
the low-side braking resistance MOSFET. It can also be replaced by the MAX627.
V_PWR
+
C405
100nF
50V
GND_PWR
GND_PWR
C404
22uF
50V
U401
C406
4.7uF
25V
1
2
3
4
5
6
7
8
9
10
SRC_DCDC
Gate_DCDCT
DCDC_T_B
DCDC_B_B
Gate_DCDCB
VCC
C2
CP_OUT
SRC_HS1
GATE_HS1
IN_HS1
IN_LS1
GATE_LS1
GND1
LR_OUT
C403
4.7uF
25V
GND_PWR
G_EN
SRC_HS2
GATE_HS2
IN_HS2
IN_LS2
GATE_LS2
GND2
C1
GND_A
VCC2
20
19
18
17
16
15
14
13
12
11
Driver_EN_B
SRC_PHA
Gate_PHAT
+15V
GND_PWR
MC33883
C408
100nF
25V
GND_PWR
PHA_T_B
PHA_B_B
Gate_PHAB
GND_PWR
C407
10uF
25V
+
GND_PWR
C401
100nF 50V
V_PWR
+
C415
100nF
50V
GND_PWR
GND_PWR
C414
22uF
50V
U402
C416
1uF
25V
PHB_T_B
PHB_B_B
SRC_PHB
Gate_PHBT
Gate_PHBB
1
2
3
4
5
6
7
8
9
10
C413
1uF
25V
GND_PWR
VCC
C2
CP_OUT
SRC_HS1
GATE_HS1
IN_HS1
IN_LS1
GATE_LS1
GND1
LR_OUT
G_EN
SRC_HS2
GATE_HS2
IN_HS2
IN_LS2
GATE_LS2
GND2
C1
GND_A
VCC2
20
19
18
17
16
15
14
13
12
11
Driver_EN_B
SRC_PHC
Gate_PHCT
PHC_T_B
PHC_B_B
Gate_PHCB
+15V
GND_PWR
GND_PWR
MC33883
C418
100nF
25V
GND_PWR
+
C417
10uF
25V
GND_PWR
C411
33nF
50V
Figure 4-7. MC33883 MOSFET Pre-driver
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
26
Freescale Semiconductor
Schematics
+15V
C421
10uF
16V
C422
100nF
25V
+
GND_PWR
6
GND_PWR
VDD
U403
GND_PWR
BRAKE_B
2 INA
OUTA
7
4 INB
OUTB
5
Gate_Brake
3
GND
MAX628CSA
GND_PWR
Figure 4-8. MAX628 MOSFET Pre-driver
The MC33883 pre-driver requires a 5V logical signal, so a 3.3V – 5V buffer is used between the UNI-3
connector and the MOSFET pre-drivers.
+5V
14
C423
100nF
6.3V
U404A
VCC
2
1
PHA_T
U404C
GND
PHA_T_B
GND
MC74VHCT50ADR2G
R411
4.7k
7
R403
4.7k
5
PHB_T
6
U404E
PHB_T_B
11
PHC_T
R413
4.7k
MC74VHCT50ADR2G
10
PHC_T_B
MC74VHCT50ADR2G
GND
U404B
GND
3
PHA_B
R404
4.7k
U404F
GND
4
PHA_B_B
13
PHB_B
R412
4.7k
MC74VHCT50ADR2G
12
U404D
GND
PHB_B_B
9
PHC_B
R414
4.7k
MC74VHCT50ADR2G
8
PHC_B_B
MC74VHCT50ADR2G
+5V
GND
GND
GND
14
C424
100nF
6.3V
U405A
VCC
2
1
DCDC_T
U405C
GND
DCDC_T_B
GND
MC74VHCT50ADR2G
7
R401
4.7k
+5V
DRV_EN
5
BRAKE
R421
4.7k
6
MC74VHCT50ADR2G
GND
3
DCDC_B
R402
4.7k
U405D
GND
4
9
DCDC_B_B
MC74VHCT50ADR2G
GND
JP401
11
R415
4.7k
10
Driver_EN_B
MC74VHCT50ADR2G
DRV_EN
U405B
GND
U405E
1
2
3
BRAKE_B
13
MC74VHCT50ADR2G
GND
U405F
GND
8
12
MC74VHCT50ADR2G
GND
Figure 4-9. 3.3V-to-5V Buffer
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
Freescale Semiconductor
27
Schematics
4.2.7 Power Supply
The 3-Phase Power Stage with DC/DC Inverter Lite contains devices requiring various voltage levels:
+15V, +5V, +3.3V, +1.65V and +0.2V.
4.2.7.1 +15V Power Supply
The +15V level is generated by means of the LT3433 switching step-up/down inverter (see Figure 4-10)
generating this voltage from the input power supply of 9V – 50V. This regulator is capable of supplying at
least 100mA, up to 500mA with respect to input voltage. This voltage level provides power to the
MC33883 MOSFET pre-drivers and charge pump, and the MAX628. It is also connected to the UNI-3 pin
19.
To connect this voltage level further into the heart of the board, it is necessary to connect jumper JP502.
If the LT3433 voltage regulator operates properly and the JP502 jumper is shorted, the D205 LED will
light.
This driver adjusts the shut-down level to 8.6V, i.e., when the input power supply drops below 8.6V, the
regulator shuts down.
L503
D507
+15V_OUT
330uH
D506
MBRA160T3
+15V_OUT
U505
1
C527 1uF 10V
V_PWR
2
3
4
C522
100nF
50V
6
R518
330k 1%
C526
1nF
6.3V
SHDN
R517
33k 1%
GND_PWR
C525
330pF
6.3V
GND_PWR GND_PWR
R513
68k
GND_PWR
FB
7
8
SGND
SGND
VBST
SW_L
SW_H
PWRGND
VIN
VOUT
BURST_EN
VBIAS
VC
SHDN
VFB
SGND
21
20
19
18
17
+
5
+ C524
100uF
16V
C523
100nF
16V
GND_PWR
G
G
G
G
EXPOSED_PAD
D508
MMSD4148T1G
GND_PWR
C521
3.3uF
50V
MBRA120ET3
SS
SGND
R514
1M 1%
16
JP502
R515
18k 1%
15
14
13
GND_PWR
+15V_OUT
GND_PWR
D509
12
11
10
9
+15V
SHDN
MMSD4148T1G
C529
10nF
10V
C528
100nF
10V
2
1
+15V_OUT
+5V_OUT
FB
R516
91k 1%
GND_PWR
LT3433IFE
GND_PWR
Figure 4-10. +15V Power Supply
4.2.7.2 +5V Power Supply
Another very important voltage level for this board is the +5V. This voltage level is obtained from the
LT1977 switching step-down inverter, and provides up to 1.5A (see Figure 4-11). The +5V level supplies
on-board logic ICs, the 3.3V linear voltage regulator, and is connected to the UNI-3 pins 14 and 15 to
supply the connected EVM or controller board.
To connect this voltage level further into the heart of the board, jumper JP501 must be connected. If the
LT1977 voltage regulator operates properly and the JP502 jumper is shorted, the D206 LED will light.
This driver adjusts the shut-down level to 7V, i.e., when the input power supply drops below 7V this
regulator shuts down.
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
28
Freescale Semiconductor
Schematics
4.2.7.3 +3.3V Power Supply
The 3.3V power supply is generated from the +5V level by means of the MC78PC33NTR linear voltage
regulator (see Figure 4-12). It is capable of sinking 150mA. This voltage level serves the on-board op-amp
power supply and the voltage reference IC supply. It is also connected to the UNI-3 pin 16 as an analog
voltage supply for the EVM or controller board.
4.2.7.4 +2.5V Reference
The 2.5V reference is generated from the +3.3V level by means of the LM385BD-2.5G linear voltage
reference (see Figure 4-13). This reference serves the +1.65V and +0.2V reference resistor dividers. It
can sink up to 20mA.
V_PWR
GND
+5V_OUT
1
L501
2
C507
100uF
6.3V
33uH
+
C508
100nF
6.3V
D502
SS26
3
C506
100nF
50V
4
5
MMSD914T1G
6
7
D501
8
+5V_OUT
+5V_OUT
NC
PG
SW
SHDN
NC
SYNC
VIN
PGFB
NC
FB
BOOST
VC
CT
BIAS
GND
CSS
21
20
19
18
17
GND
2
1
U501
GND
V_PWR
JP501
C510
100nF
50V
+
G
G
G
G
EXPOSED_PAD
C509
3.3uF
50V
+5V
R501
43k 1%
16
15
14
C504
10pF
16V
13
GND
12
11
R502
10k 1%
R504
100k 1%
10
C503
1500pF
6.3V
9
LT1977IFE
R503
300k 1%
C505
100nF
6.3V
C502
330pF
6.3V
GND
GND
R505
27k
GND
GND
Figure 4-11. +5V Power Supply
+5V
3
CE
+3.3V_A
C516
4.7uF
4V
2
C515
2.2uF
6.3V
Gnd
U503
MC78PC33NTR
1
5
Vin Vout
GND
GNDA
Figure 4-12. +3.3V Power Supply
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
Freescale Semiconductor
29
Schematics
4.2.7.5 +1.65V Reference
The +1.65V is provided by the R510 and R509 resistor divider from the +2.5V reference voltage (see
Figure 4-13). The resistors are calculated for 42µA where the reference is at its most precise. The divider
shifts the current sensing value.
4.2.7.6 +0.2V Reference
The +0.2V is provided by the R512 and R511 resistor divider from the +2.5V reference voltage (see
Figure 4-13). The resistors are calculated for 42µA where the reference is at the most precise. The divider
shifts the voltage sensing value according to AD converter offset.
+3.3V_A
+2.5V_REF
+2.5V_REF
+2.5V_REF
+1.65V_REF
+0.2V_REF
R508 180R
C517
1uF
4V
R510
430R 1%
1
2
3
4
U504
8
7
6
5
LM385BD-2.5G
GNDA
C518
330nF
4V
C519
10pF
4V
R509
820R 1%
R512
1.5k 1%
C520
10pF
4V
R511
130R 1%
GNDA
GNDA
Figure 4-13. Voltage Reference
4.2.8 Analog Signals Sensing
Some voltages and currents in the 3-Phase Power Stage with DC/DC Inverter Lite can be sensed, i.e.,
they are connected to the UNI-3 pins. Those are: input power voltage, the voltage at the DC/DC inverter
output, and 3-phase inverter current (to the motor).
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
30
Freescale Semiconductor
Schematics
4.2.8.1 Input Power Voltage Sensing
The input power voltage is measured at the input to the DC/DC inverter by means of the R604 and R605
voltage divider. The divider voltage is led to the U603-2 LM6144 op-amp channel (see Figure 4-14). The
gain of the op-amp is 1. Its aim is to shift the output by 0.2V according to some ADC offset, so an output
of 0.2V – 3.3V corresponds to an input of 0V – 47.5V. If the board is used with a voltage below 31V, the
R604 resistor can be changed to 27kΩ 1% in order to change the measurement scale to 0V – 31V. The
output is connected to the UNI-3 pin 26.
V_PWR
R603 100k 1%
R601
100k 1%
6
5
+
R605
3k 1%
-
R604
43k 1%
100k 1%
R602
GND_PWR
7
S_VPWR
U603-2
LM6144AIM
R606
100k 1%
+0.2V_REF
Figure 4-14. Input Power Voltage Sensing
4.2.8.2 DC/DC Inverter Output Voltage Sensing
The DC/DC inverter output voltage is measured by means of the R614 and R615 voltage divider. The
divider voltage is led to the U603-3 LM6144 op-amp channel (see Figure 4-15). The gain of the op-amp
is 1. Its aim is to shift the output by 0.2V according to some ADC offset. So an output of 0.2V to 3.3V
corresponds to an input of 0V – 47.5V. If the board is used with a voltage below 31V, the R614 resistor
can be changed to 27kΩ 1% in order to change the measurement scale to 0V – 31V. The output is
connected to the UNI-3 pin 21.
V_DCDC
R613 100k 1%
R611
100k 1%
9
10
+
R615
3k 1%
-
R614
43k 1%
100k 1%
R612
GND_PWR
8
S_VDCDC
U603-3
LM6144AIM
R616
100k 1%
+0.2V_REF
Figure 4-15. DC/DC Inverter Output Voltage Sensing
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
Freescale Semiconductor
31
Schematics
4.2.8.3 3-phase Inverter Current Sensing
The 3-phase inverter current is sensed at the R327 shunt resistor. The current observed here represents
all the current flowing to (from) the 3-phase inverter, i.e., to the motor. The shunt resistor is represented
by a 0.040Ω resistor, either an Isabellenhutte PMA SMD resistor or a Vishay VLR-3 TH resistor. The PMA
resistor contains Kelvin terminals for precise current measurement, while the VLR-3 senses at its pins. If
the TH is used the R329 and R330 0Ω resistors must be populated, otherwise they must be left vacant
(see Figure 4-6, Figure 4-16). The gain of this op-amp is 2.94 with a 1.65V offset, i.e., output of 0V – 3.3V
corresponds to -14.025A – 14.025A, where 1.65V represents zero current. The output is connected to the
UNI-3 pin 22.
11
R661 150k 1%
-
I_Sense2
3
+
4
R665 51k 1%
GNDA
1
+V
2
-V
R662 51k 1%
I_Sense1
S_I_DCBUS
U603-1
LM6144AIM
+3.3V_A
C602
100nF
4V
R666
150k 1%
+1.65V_REF
GNDA
Figure 4-16. 3-phase Inverter Current Sensing
4.2.8.4 BEMF Voltage Sensing
The BEMF voltages are measured by means of the R624 and R625, R634 and R635, R644 and R645
voltage dividers. The divider voltages are led directly to the UNI-3 pins 38, 39 and 40 without any offset
correction (see Figure 4-17), so the output 0V – 3.3V corresponds to 0V – 50.6V. If the board is used with
a voltage below 33V, the R624, R634, R644 resistors can be changed to 27k 1% for the scale 0V – 33V.
Phase_A
Phase_B
R624
43k 1%
R634
43k 1%
S_BEMF_PHA
R625
3k 1%
GND_PWR
Phase_C
R644
43k 1%
S_BEMF_PHB
R635
3k 1%
S_BEMF_PHC
R645
3k 1%
GND_PWR
GND_PWR
Figure 4-17. BEMF Voltage Sensing
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
32
Freescale Semiconductor
Motor Connections
4.3 Motor Connections
Proper motor connection is provided in Figure 4-18. The 3-Phase Power Stage with DC/DC Inverter Lite
should be connected to the EVM, or controller board via the J201 UNI-3 connector. This connector
transfers all necessary power to supply the connected board, so 12V – 42V is supplied to the 3-Phase
Power Stage with DC/DC Inverter Lite. The phases of the motor are connected to the output and the motor
sensor is connected to the EVM or controller board.
Freescale Semiconductor
Embedded Motion Control
Series
Evaluation Module
Freescale Semiconductor
Embedded Motion Control
3-ph. Power Stage with
DC/DC Inverter Lite
+
+12 - 42 Vdc
+12 - 42 Vdc
–
J206
40-Pin
Ribbon Cable
J201
J202
Phase_C
3
Phase_B
2
Phase_A
1
Motor
Hall/Encoder
Connector
1
2
3
4
5
6
ENCODER HOME
HALL C / ENCODER INDEX
HALL B / ENCODER PHASE B
HALL A / ENCODER PHASE A
GND
+5V
Figure 4-18. Motor Connections — Schematic View
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
Freescale Semiconductor
33
Schematics
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
34
Freescale Semiconductor
Appendix A
Bill of Materials
The 3-Phase Power Stage with DC/DC Inverter Lite’s bill of materials is described in the following parts
list.
Table A-1. Parts List (Sheet 1 of 4)
Qty.
Reference
Part Value
Description
Mfg.
Mfg. Part No.
3
C221, C222, C223
33nF/25V
Ceramic capacitor, 0805,
Phycomp
33nF/25V
3
C301, C302, C303
22000µF/50V
Electrolytic Capacitor
16mm, 2200µF/50V
19
C304, C305, C405,
C408, C311, C401,
C415, C418, C422,
C423, C424, C505,
C506, C508, C510,
C602, C522, C523,
C528
100nF/50V
Ceramic capacitor, 0805,
AVX
100nF/50V
08055C104KAT2A
1
C306
47µF/50V
Electrolytic Capacitor
8mm, 47µF/50V
50RX3047MEFG8X11.5
2
C403, C406
4.7µF/25V
Ceramic capacitor, 1206,
Kemet
4.7µF/25V
C1206C475K3PAC
2
C404, C414
22µF/50V
Electrolytic capacitor,
SMD 6.3mm, 22µF/50V
Nichicon
UUD1H220MCR1GS
2
C407, C417
10µF/25V
Electrolytic capacitor,
SMC 5mm, 10µF/25V
Nichicon
UWX1E100MCR1GB
1
C411
33nF/50V
Ceramic capacitor, 0805,
Phycomp
33nF/50V
2238 580 15643
2
C413, C416
1µF/25V
Ceramic capacitor, 0805,
Multicomp
1µF/25V
T0805F105ZNT
1
C421
10µF/16V
Electrolytic capacitor,
SMB 4mm, 10µF/16V
Panasonic
EEVFC1C100R
2
C502, C525
330pF/100V
Ceramic capacitor, 0805,
Multicomp
330pF/100V
A0805C331JNT
1
C503
1500pF/50V
Ceramic capacitor, 0805,
Phycomp
1500pF/50V
2238 5871 5625
3
C504, C519, C520
10pF/100V
Ceramic capacitor, 0805,
Multicomp
10pF/100V
A0805C100JNT
1
C507
100µF/6.3V
BC
Electrolytic capacitor,
COMPONENTS
SMD 6.3mm, 100µF/6.3V
VISHAY
2222 1536 3101
2
C509, C521
3.3µF/50V
Electrolytic capacitor,
SMB 4mm, 3.3µF/50V
UWX1H3R3MCR1GB
Panasonic
Rubycon
Nichicon
2238 910 15643
ECA1HHG222
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
Freescale Semiconductor
35
Bill of Materials
Table A-1. Parts List (Sheet 2 of 4)
Qty.
Reference
Part Value
Description
Mfg.
Mfg. Part No.
1
C515
2.2µF/16V
Ceramic capacitor, 1206,
Murata
2.2µF/16V
GRM31MR71C225KA35L
1
C516
4.7µF/16V
Ceramic capacitor, 1206,
Murata
4.7µF/16V
GRM31MF51C475ZA12L
1
C517
1µF/16V
Ceramic capacitor, 0805,
Murata
1µF/16V
GRM21BR71C105KA01L
1
C518
330nF/16V
Ceramic capacitor, 0805,
Multicomp
330nF/16V
B0805R334KNT
1
C524
100µF/16V
Electrolytic capacitor,
Nichicon
SMD 6.3mm, 100µF/16V
UWX1C101MCR1GB
1
C526
1nF/50V
Ceramic capacitor, 0805,
Phycomp
1nF/50V
2238 580 15623
1
C527
1µF/10V
Ceramic capacitor, 0805,
Multicomp
1µF/10V
N0805R105KNT
1
C529
10nF/50V
Ceramic capacitor, 0805,
Multicomp
10nF/50V
U0805R103KNT
2
D205, D206
SMD LED Green
LED, green, 0805
Fairchild
Semiconductor
QTLP630C-4
1
D207
SMD LED Yellow
LED, yellow, 0805
Fairchild
Semiconductor
QTLP630C-3
8
D301, D302, D304,
D305, D306, D307,
D308, D309
MBRM140T3G
Diode 1A/40V, CASE457
On Semiconductor MBRM140T3G
4
D310, D311, D312,
D313
1PMT5930BT1G
Zener diode 16V/3W
On Semiconductor 1PMT5930BT1G
1
D303
SS16T3
Diode 1A/60V, SMA
On Semiconductor SS16T3
1
D501
MMSD914T1G
Diode 200mA/100V,
SOD-123
On Semiconductor QTLP630C-4
1
D502
SS26T3
Diode 2A/60V, SMB
On Semiconductor SS26T3
1
D506
MBRA160T3
Diode 1A/60V, SMA
On Semiconductor MBRA160T3
1
D507
MBRA120ET3
Diode 1A/20V, SMA
On Semiconductor MBRA120ET3
2
D508, D509
MMSD4148T1G
Diode 200mA/100V,
SOD-123
On Semiconductor MMSD4148T1G
1
HS301
TV101
Heatsink for TO220
AAVID Thermalloy TV101
1
J201
CON/40
Header 40 pins
breakaway connector
Multicomp
MC9A12-2034
1
J202
3-way connector
3-way straight connector
Molex
39-26-3030
Power Jack
Power Jack type
connector 2.1 mm
Switchcraft
RAPC722
Test point
Keystone
5002
1
J206
7
J209, J210, J212, J213,
Test point
J214, J215, J216
1
JP401
Header 2.54mm,
3x1
Header 2.54mm, 3x1
Molex
90120-0763
2
JP501, JP502
Header 2.54mm,
2x1
Header 2.54mm, 2x1
Molex
90120-0762
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
36
Freescale Semiconductor
Table A-1. Parts List (Sheet 3 of 4)
Qty.
Reference
Part Value
Description
Mfg.
Mfg. Part No.
1
L301
560µH/6A
390µH/5A
Power Inductor
Coilcraft
PCV2-564-06
PCV1-394-05
1
L501
33µH/1.5A
SM Power Inductor
Coilcraft
MSS7341-333MXB
1
L503
330µH/0.6A
SM Power Inductor
Coilcraft
DO3316P-334
7
Q301, Q302, Q303,
Q305, Q306, Q307,
Q308
Si4470EY
N-channel SO8
MOSFET, 60V/12.7A
Vishay
Si4470EY
2
Q304, Q309
NTP75N06G
N-channel TO220
MOSFET, 60V/75A
On Semiconductor NTP75N06G
7
R201, R202, R203,
R219, R220, R329,
R330
0R0
Resistor 0Ω, 0805
Multicomp
MC 0.1W 0805 0R
1
R216
3k
Resistor 3kΩ, 5%, 0805
Multicomp
MC 0.1W 0805 5% 3K
2
R217, R218
1k
Resistor 1kΩ, 5%, 0805
Multicomp
MC 0.1W 0805 5% 1K
3
R221, R222, R223
10R-1%
Resistor 10Ω, 1%, 0805
Multicomp
MC 0.1W 0805 1% 10R
4
R302, R313, R317,
R321
6.8R
Resistor 6.8Ω, 5%, 0805
Multicomp
MC 0.1W 0805 5% 6R8
4
R304, R311, R315,
R319
3.3R
Resistor 3.3Ω, 5%, 0805
Multicomp
MC 0.1W 0805 5% 3R3
9
R303, R305, R312,
R314, R316, R318,
R320, R322, R328
10R
Resistor 10Ω, 5%, 0805
Multicomp
MC 0.1W 0805 5% 10R
2
R306, R307
10R/5W
Power Resistor 10Ω, 5W
Welwyn
MO5S-10RJI
1
R327
0.040R 1%
Shunt Resistor 40mΩ, 1%
Vishay
(Isabellenhuette)
LVR-3 0.040 1%
(PMA-A-R040-1)
10
R401, R402, R403,
R404, R411, R412,
R413, R414, R415,
R421
4.7k
Resistor 4.7kΩ, 5%, 0805 Multicomp
MC 0.1W 0805 5% 4K7
6
R501, R604, R614,
R624, R634, R644
43k-1%
Resistor 43kΩ, 1%, 0805 Multicomp
MC 0.1W 0805 1% 43K
1
R502
10k-1%
Resistor 10kΩ, 1%, 0805 Multicomp
MC 0.1W 0805 1% 10K
1
R503
300k-1%
Resistor 300kΩ, 1%, 0805 Multicomp
MC 0.1W 0805 1% 300K
9
R504, R601, R602,
R603, R606, R611,
R612, R613, R616
100k-1%
Resistor 100kΩ, 1%, 0805 Multicomp
MC 0.1W 0805 1% 100K
1
R505
27k
Resistor 27kΩ, 5%, 0805 Multicomp
MC 0.1W 0805 5% 27K
1
R508
180R
Resistor 180Ω, 5%, 0805 Multicomp
MC 0.1W 0805 5% 180R
1
R509
820R-1%
Resistor 820Ω, 1%, 0805 Multicomp
MC 0.1W 0805 1% 820R
1
R510
430R-1%
Resistor 430Ω, 1%, 0805 Multicomp
MC 0.1W 0805 1% 430R
1
R511
130R-1%
Resistor 130Ω, 1%, 0805 Multicomp
MC 0.1W 0805 1% 130R
3
R512, R615, R617
1.5k-1%
Resistor 1.5kΩ, 1%, 0805 Multicomp
MC 0.1W 0805 1% 1K5
1
R513
68k
Resistor 68kΩ, 5%, 0805 Multicomp
MC 0.1W 0805 5% 68K
1
R514
1M-1%
Resistor 1MΩ, 1%, 0805
MC 0.1W 0805 1% 1M
Multicomp
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
Freescale Semiconductor
37
Bill of Materials
Table A-1. Parts List (Sheet 4 of 4)
Qty.
Reference
Part Value
Description
Mfg.
Mfg. Part No.
1
R515
18k-1%
Resistor 18kΩ, 1%, 0805 Multicomp
MC 0.1W 0805 1% 18K
1
R516
91k-1%
Resistor 91kΩ, 1%, 0805 Multicomp
MC 0.1W 0805 1% 91K
1
R517
33k-1%
Resistor 33kΩ, 1%, 0805 Multicomp
MC 0.1W 0805 5% 33K
1
R518
330k-1%
Resistor 680kΩ, 1%, 0805 Multicomp
MC 0.1W 0805 1% 330K
5
R605, R615, R625,
R635, R645
3k-1%
Resistor 3kΩ, 1%, 0805
MC 0.1W 0805 1% 3K
2
R661, R666
150k-1%
Resistor 150kΩ, 1%, 0805 Multicomp
MC 0.1W 0805 1% 150K
2
R662, R665
51k-1%
Resistor 51kΩ, 1%, 0805 Multicomp
MC 0.1W 0805 1% 51K
2
U401, U402
MC33883
Full bridge MOSFET
pre-driver
Freescale
Semiconductor
MC33883
1
U403
MAX628CSA
MAX627CSA
MOSFET pre-driver
Maxim
MAX628CSA
MAX627CSA
2
U404, U405
MC74VHCT50AD
Hex buffer
R2G
1
U501
LT1977EFE
1
U503
Multicomp
On Semiconductor MC74VHCT50ADR2G
Step-down switching
regulator
Linear Technology LT1977EFE
MC78PC33NTR
Linear regulator 3.3V
On Semiconductor MC78PC33NTR
On Semiconductor LM385BD-2.5G
1
U504
LM385BD-2.5G
Linear voltage reference
2.5V
1
U505
LT3433EFE
Step-down/up switching
regulator
Linear Technology LT3433EFE
1
U603
LM6144AIM
MC33204D
Quad channel rail-to-rail
operational amplifier
National
LM6144AIM
Semiconductor
MC33204D
On Semiconductor
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
38
Freescale Semiconductor
Appendix B
PCB
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
Freescale Semiconductor
39
PCB
Figure B-1. Top Copper Layer
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
40
Freescale Semiconductor
Figure B-2. Bottom Copper Layer (from bottom)
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
Freescale Semiconductor
41
PCB
Figure B-3. Top Silkscreen Layer
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
42
Freescale Semiconductor
Figure B-4. Bottom Silkscreen Layer (from bottom)
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
Freescale Semiconductor
43
PCB
3-Phase Power Stage with DC/DC Inverter Lite, Rev. 0
44
Freescale Semiconductor
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TPPSDDILUM
Rev. 0, 3/2006
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