Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
BRIDGED RB-TA3020-1, BRIDGED RB-TA3020-2, BRIDGED RB-TA3020-3
CLASS-T DIGITAL AUDIO AMPLIFIER EVALUATION BOARD
USING DIGITAL POWER PROCESSING (DPP T M ) TECHNOLOGY
Technical Information-Preliminary
Revision 1.0
- June 2001
GENERAL DESCRIPTION
The Bridged RB-TA3020 evaluation board is based on the TA3020 digital audio power amplifier from
Tripath Technology. This board is designed to provide a simple and straightforward environment for
the evaluation of the Tripath TA3020 amplifier in bridged mode. This board is implemented in a
bridged configuration for high power mono output.
Note: There are three versions of the Bridged RB-TA3020, depending on nominal supply
voltage and desired output power.
Bridged RB-TA3020-1 – Nominal supply voltage +/-23V to +/-36V
Bridged RB-TA3020-2 – Nominal supply voltage +/-30V to +/-48V
Bridged RB-TA3020-3 – Nominal supply voltage +/-40V to +/-64V
FEATURES
Bridged RB-TA3020-1: 300W continuous
output power @ 0.1% THD+N, 4Ω, +30V
Bridged RB-TA3020-2: 600W continuous
output power @ 0.1% THD+N, 4Ω, +43V
Bridged RB-TA3020-3: 1200W continuous
output power @ 0.1% THD+N, 4Ω, +60V
Outputs short circuit protected
1
BENEFITS
Quick, easy evaluation and testing of the
TA3020 amplifier in bridged mode
Uses only N-channel power MOSFETs
Ready to use in many applications:
o Car Audio Amplifier
o Powered Subwoofers
o High Power Mono Amplifier
Bridged RB-TA3020-1-3 – MC/1.0/06-01, EAD003
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
OPERATING INSTRUCTIONS
Power Supply Description
There are four external power supplies required to operate this board: VPP, VNN, VN10, and V5
(see Figures 1 and 2). VPP and VNN power the load and so must each be able to provide half of
the desired output power, plus about 20% for overhead and margin. The TA3020 amplifier also
requires a supply, VN10, that is 10V more positive than VNN and tracks VNN.
Though not required, the following powering-up sequence is usually adhered to during bench
evaluations: 1st) V5 and VN10, 2nd) VNN and 3rd) VPP (refer to the Turn-on/off Pop section). The
positive and negative supply voltages do not have to match or track each other, but distortion or
clipping levels will be determined by the lowest (absolute) supply voltage. Figure 1 shows the
proper supply configuration for the EB-TA3020.
VPP (yellow)
V5 (red)
VS
5V
AGND (black)
PGND (blue)
VN10 (green)
VS
10V
VNN (orange)
Note: To avoid signal degradation, the Analog Ground and Power Ground should be kept
separate at the power supply. They are connected locally on the Bridged RB-TA3020-X. The two VPP
yellow wires should be tied together and the two VNN orange wires should also be tied together.
Connector
Power Supply
J2 (Yellow)
VPP
J2 (Blue)
PGND
J2 (Orange)
VNN
J2 (Orange)
VNN
J2 (Green)
VN10
J2 (Yellow)
VPP
J1 (Red)
V5
J1 (Black)
AGND
Table 1
2
Bridged RB-TA3020-1-3 – MC/1.0/06-01, EAD003
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
Input Connections
Audio input to the board is located at INPUT (J200) (see Figures 2 and 3). The input can be a test
signal or music source. An RCA cable is provided with a female 100mil connector to mate with J200.
Output Connections
There are two output connectors on the reference board for the speaker output. The positive
output is connected to J101 with a red wire attached. The negative output is connected to J202
with a black wire attached. The negative output is not a ground, but an output signal with equal
amplitude and opposite phase compared to the positive output. Outputs can be any passive
speaker(s) or test measurement equipment with resistive load (see Application Note 4 for more
information on bench testing).
Turn-on/off Pop
To avoid turn-on pops, bring the mute from a high to a low state after all power supplies have
settled. To avoid turn-off pops, bring the mute from a low to a high state before turning off the
supplies. The only issue with bringing up the V5 last, or turning it off first, is clicks/pops. If the
mute line is properly toggled (slow turn-on, quick turn-off), then any power up sequence is
acceptable. In practice, the V5 will usually collapse before VPP and VNN. The same holds true
for the VN10 supply. It can collapse before VPP or VNN though this may cause a larger turn-off
pop than if the mute had been activated before either the VN10 or V5 supply have collapsed. No
damage will occur to the TA3020 if either the V5 or VN10 collapse before VPP or VNN.
3
Bridged RB-TA3020-1-3 – MC/1.0/06-01, EAD003
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
EB-TA3020 BOARD
Output
Transistors
Positive
Output (red)
Offset
Adjustment
Power In
VPP (yel)
PGND (blu)
VNN (org)
VNN (org)
VN10 (grn)
VPP(yel)
V5 (red)
AGND (blk)
Input
Connector
Break Before Make
Jumpers
Mute
Jumper
Negative
Output (blk)
Output
Transistors
Figure 2
4
Bridged RB-TA3020-1-3 – MC/1.0/06-01, EAD003
M102
M100
Audio Source
C211
BBM1
BBM0
MUTE
M202
C209
M200
L200
C213
M201
M203
5V
Offset
Adjust
AGND
Input
Negative Output
- +
- +
VNN
AGND
V5
Tripath
TA3020
VNN
VNN
VN10
VPP
- +
10V
VPP
PGND
- +
VPP
C111
Positive Output
C113
L100
C109
M101
M103
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
Figure 3
5
Bridged RB-TA3020-1-3 – MC/1.0/06-01, EAD003
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
ELECTRICAL CHARACTERISTICS FOR BRIDGED RB-TA3020-1
Unless otherwise specified, f = 1kHz, Measurement Bandwidth = 22kHz, RL = 4Ω, TA = 25 °C.
All of the measurements are typical value.
SYMBOL
PO
+Freqsw
PARAM ETER
Output Power
(Continuous Average/bridged load)
Bridged RB-TA3020-1
+/-30V power supplies
CONDITIONS
THD+N = 0.1%
THD+N = 10%
VALUE
RL = 4Ω
RL = 2Ω
RL = 4Ω
RL = 2Ω
350W
600W
500W
850W
VN10Iq
Switching Frequency of the Positive
Output
Switching Frequency of the Negative
Output
Quiescent Current of VN10 supply
V5Iq
Quiescent Current of V5 supply
VIN = 0 V
45mA
VPPIq
Quiescent Current of VPP supply
VIN = 0 V
100mA
VNNIq
Quiescent Current of VNN supply
VIN = 0 V
100mA
η
Power Efficiency
+/- 30V, POUT = 500W, RL = 4Ω
89%
η
Power Efficiency
+/- 30V, POUT = 850W, RL = 2Ω
83%
Output Noise Voltage
A-Weighted, input AC grounded
215uV
-Freqsw
eOUT
VIN = 0 V
650kHz
VIN = 0 V
620kHz
VIN = 0 V
180mA
ELECTRICAL CHARACTERISTICS FOR BRIDGED RB-TA3020-2
Unless otherwise specified, f = 1kHz, Measurement Bandwidth = 22kHz, RL = 4Ω, TA = 25 °C.
All of the measurements are typical value.
SYMBOL
PO
PO
+Freqsw
-Freqsw
CONDITIONS
VALUE
RL = 4Ω
RL = 2Ω
RL = 4Ω
710W
950W
1000W
RL = 2Ω
RL = 2Ω
650W
900W
640kHz
VIN = 0 V
605kHz
VN10Iq
Switching Frequency of the Negative
Output
Quiescent Current of VN10 supply
VIN = 0 V
270mA
V5Iq
Quiescent Current of V5 supply
VIN = 0 V
45mA
VPPIq
Quiescent Current of VPP supply
VIN = 0 V VPP = +43V VNN = -43V
110mA
110mA
VNNIq
Quiescent Current of VNN supply
VIN = 0 V VPP = +43V VNN = -43V
η
Power Efficiency
+/- 43V, POUT = 1000W, RL = 4Ω
88%
η
Power Efficiency
+/- 33V, POUT = 900W, RL = 2Ω
83%
Output Noise Voltage
A-Weighted, input AC grounded
300uV
eOUT
6
PARAM ETER
Output Power
THD+N = 0.1%
(Continuous Average/bridged load)
Bridged RB-TA3020-2
THD+N = 10%
+/-43V power supplies
Output Power
THD+N = 0.1%
(Continuous Average/bridged load)
THD+N = 10%
Bridged RB-TA3020-2
+/-33V power supplies
Switching Frequency of the Positive Output VIN = 0 V
Bridged RB-TA3020-1-3 – MC/1.0/06-01, EAD003
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
ELECTRICAL CHARACTERISTICS FOR BRIDGED RB-TA3020-3
Unless otherwise specified, f = 1kHz, Measurement Bandwidth = 22kHz, RL = 4Ω, TA = 25 °C.
All of the measurements are typical value.
SYMBOL
PO
PO
+Freqsw
-Freqsw
CONDITIONS
VALUE
RL = 4Ω
RL = 4Ω
1350W
1800W
RL = 2Ω
RL = 2Ω
1350W
1500W
630kHz
VIN = 0 V
600kHz
VN10Iq
Switching Frequency of the Negative
Output
Quiescent Current of VN10 supply
VIN = 0 V
290mA
V5Iq
Quiescent Current of V5 supply
VIN = 0 V
45mA
VPPIq
Quiescent Current of VPP supply
VIN = 0 V VPP = +60V VNN = -60V
130mA
VNNIq
Quiescent Current of VNN supply
VIN = 0 V VPP = +60V VNN = -60V
140mA
η
Power Efficiency
+/- 60V, POUT = 1800W, RL = 4Ω
87%
η
Power Efficiency
+/- 43V, POUT = 1200W, RL = 2Ω
84%
Output Noise Voltage
A-Weighted, input AC grounded
400uV
eOUT
7
PARAM ETER
Output Power
THD+N = 0.1%
(Continuous Average/bridged load)
THD+N = 10%
Bridged RB-TA3020-3
+/-60V power supplies
Output Power
THD+N = 0.1%
(Continuous Average/bridged load)
THD+N = 10%
Bridged RB-TA3020-3
+/-43V power supplies
Switching Frequency of the Positive Output VIN = 0 V
Bridged RB-TA3020-1-3 – MC/1.0/06-01, EAD003
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
TYPICAL PERFORMANCE FOR BRIDGED RB-TA3020-1
THD+N vs Output Power
THD+N vs Output Power
10
10
5
5
f = 1kHz
BBM = 80nS
Vs= +/- 30V
RLoad = 4Ω
BW = 22Hz - 22kHz
2
1
2
1
THD+N (%)
0.5
0.2
THD+N (%)
f = 1kHz
BBM = 80nS
Vs = +/-30V
RLoad = 2Ω
BW = 22Hz - 22kHz
0.1
0.05
0.5
0.2
0.1
0.02
0.05
0.01
0.005
0.02
0.002
0.001
0.01
1
2
5
10
20
Output Power (W)
50
100
200
500
1
2
5
THD+N vs Frequency
10
5
2
1
200
500
1k
10k
20k
900
1000
BBM = 80nS
Vs = +/-30V
Pout = 150W
RLoad = 2Ω
BW = 22Hz - 22kHz
2
1
0.5
0.2
THD+N (%)
THD+N (%)
100
5
0.5
0.1
0.05
0.02
0.2
0.1
0.05
0.02
0.01
0.01
0.005
0.005
0.002
0.002
0.001
20
50
100
200
500
1k
Frequency (Hz)
2k
5k
10k
0.001
20
20k
50
100
Efficiency vs Output Power
100.00
90
90.00
80
80.00
70
70.00
60
50
40
f = 1kHz
BBM = 80nS
Vs = +/- 30V
Rload = 4Ω
30
20
200
500
1k
Frequency (Hz)
2k
5k
Efficiency vs Output Power
100
Efficiency (%)
Efficiency (%)
20
50
Output Power (W)
THD+N vs Frequency
10
BBM = 80nS
Vs= +/- 30V
Pout = 150W
RLoad = 4Ω
BW = 20Hz - 20kHz
10
60.00
50.00
40.00
30.00
f= 1kHz
BBM = 80nS
Vs = +/-30V
Rload = 2Ω
20.00
10.00
10
0.00
0
0
50
100
150
200
250
300
350
Output Power (W)
8
400
450
500
550
600
650
0
100
200
300
400
500
600
700
800
Output Power (W)
Bridged RB-TA3020-1-3 – MC/1.0/06-01, EAD003
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
TYPICAL PERFORMANCE FOR BRIDGED RB-TA3020-2
THD+N vs Output Power
THD+N vs Frequency
10
10
5
f = 1kHz
BBM = 120nS
Vs = +/- 43V
RLoad = 4Ω
BW = 22Hz-22kHz
2
1
2
0.5
1
THD+N (%)
0.2
THD + N (%)
f = 1kHz
BBM = 120nS
Vs= +/- 43V
RLoad = 2Ω
BW = 22Hz - 22kHz
5
0.1
0.05
0.02
0.5
0.2
0.1
0.01
0.05
0.005
0.002
0.001
0.02
1
2
5
10
20
50
100
200
500
1k
2k
0.01
Output Power (W)
1
2
5
10
THD+N vs Frequency
50
100
Output Power (W)
200
500
1k
2k
10k
20k
THD+N vs Frequency
10
10
5
5
BBM = 120nS
Vs= +/- 43V
Pout = 200W
RLoad = 4Ω
BW = 22Hz - 22kHz
2
1
2
1
0.5
BBM = 120nS
Vs= +/- 43V
Pout = 200W
RLoad = 2Ω
BW = 22Hz - 22kHz
0.5
THD+N (%)
THD+N (%)
20
0.2
0.1
0.05
0.2
0.1
0.05
0.02
0.02
0.01
0.01
0.005
0.005
0.002
0.002
0.001
20
50
100
200
500
1k
Frequency(Hz)
2k
5k
10k
20k
0.001
20
50
100
200
500
1k
Frequency (Hz)
2k
5k
Efficiency vs Output Power
Efficiency vs Output Power
100
90
90
80
80
70
60
60
Efficiency (%)
Efficiency (%)
70
50
40
50
40
30
30
f = 1kHz
BBM = 120nS
Vs = +/-43V
Rload = 4Ω
20
10
f = 1kHz
BBM = 120nS
Vs = +/- 43V
Rload = 2Ω
20
10
0
0
100
200
300
400
500
600
700
800
Output Power (W)
9
900
1000 1100 1200 1300 1400
0
0
100
200
300
400
500
600
700
800
900
1000
Output Power (W)
Bridged RB-TA3020-1-3 – MC/1.0/06-01, EAD003
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
TYPICAL PERFORMANCE FOR BRIDGED RB-TA3020-2
THD+N vs Frequency
THD+N vs Output Power
10
10
5
2
1
1
0.5
0.5
0.2
THD+N (%)
THD + N (%)
2
5
f = 1kHz
BBM = 120nS
Vs= +/- 33V
RLoad = 2Ω
BW = 22Hz - 22kHz
0.2
0.1
BBM = 120nS
Vs= +/- 33V
Pout = 200W
RLoad = 2Ω
BW = 22Hz - 22kHz
0.1
0.05
0.02
0.01
0.05
0.005
0.02
0.01
1
0.002
2
5
10
20
50
Output Power (W)
100
200
500
1k
0.001
20
50
100
200
500
1k
Frequency (Hz)
2k
5k
10k
Efficiency vs Output Power
90.00
80.00
70.00
Efficiency (%)
60.00
50.00
40.00
30.00
f = 1kHz
BBM = 120nS
Vs = +/- 33V
Rload = 2Ω
20.00
10.00
0.00
0.00
200.00
400.00
600.00
800.00
1000.00
Output Power (W)
10
Bridged RB-TA3020-1-3 – MC/1.0/06-01, EAD003
20k
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
TYPICAL PERFORMANCE FOR BRIDGED RB-TA3020-3
THD + N vs Output Power
THD + N vs Output Power
10
5
2
10
5
f = 1kHz
BBM = 120nS
Vs = +/- 60V
RLoad = 4Ω
BW = 22Hz-22kHz
2
1
THD + N (%)
THD + N (%)
1
0.5
0.2
0.5
0.2
0.1
0.1
0.05
0.05
0.02
0.02
0.01
1
f = 1kHz
BBM = 120nS
Vs = +/- 60V
RLoad = 2Ω
BW = 22Hz-22kHz
2
5
10
20
50
100
Output Power (W)
200
500
1k
0.01
1
2k
2
5
10
1
5
BBM = 120nS
Vs = +/- 60V
Pout = 300W
RLoad = 4Ω
BW = 22Hz-22kHz
2
500
1k
2k
1
5k
10k
20k
BBM = 120nS
Vs = +/- 60V
Pout = 300W
RLoad = 2Ω
BW = 22Hz-22kHz
0.5
THD + N (%)
THD + N (%)
200
10
0.5
0.2
0.1
0.05
0.02
0.2
0.1
0.05
0.02
0.01
0.01
0.005
0.005
0.002
0.002
0.001
20
50
100
200
500
1k
2k
5k
10k
0.001
20
20k
50
100
Frequency (Hz)
90
90
80
80
70
70
60
Efficiency (%)
100
60
50
40
20
500
1k
Frequency (Hz)
2k
50
40
30
f = 1kHz
BBM = 120nS
Vs = +/-60V
Rload = 4Ω
30
200
Efficiency vs Output Power
Efficiency vs Output Power
Efficiency (%)
100
THD + N vs Frequency
THD + N vs Frequency
2
50
Output Power (W)
10
5
20
f = 1kHz
BBM = 120nS
Vs = +/- 60V
Rload = 2Ω
20
10
10
0
0
0
200
400
600
800
1000
1200
Output Power (W)
11
1400
1600
1800
2000
0
200
400
600
800
1000
1200
1400
Output Power (W)
Bridged RB-TA3020-1-3 – MC/1.0/06-01, EAD003
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
TYPICAL PERFORMANCE FOR BRIDGED RB-TA3020-3
THD+N vs Output Power
THD+N vs Frequency
10
5
2
10
f = 1kHz
BBM = 120nS
Vs= +/- 43V
RLoad = 2Ω
BW = 22Hz - 22kHz
5
2
1
THD+N (%)
THD+N (%)
1
0.5
0.2
0.5
0.2
0.1
0.1
0.05
0.05
0.02
0.02
0.01
1
BBM = 120nS
Vs= +/- 43V
Pout = 300W
RLoad = 2Ω
BW = 22Hz - 22kHz
2
5
10
20
50
100
200
500
1k
2k
Output Power (W)
0.01
20
50
100
200
500
1k
Frequecy (Hz)
2k
5k
10k
20k
Efficiency vs Output Power
90.00
80.00
70.00
Efficiency (%)
60.00
50.00
40.00
30.00
f = 1kHz
BBM = 120nS
Vs = +/- 43V
Rload = 2Ω
20.00
10.00
0.00
0.00
200.00
400.00
600.00
800.00
1000.00
1200.00
1400.00
1600.00
Output Power (W)
12
Bridged RB-TA3020-1-3 – MC/1.0/06-01, EAD003
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Safe Operating Areas
The TA3020 must always remain in the safe operating area in order to ensure a robust and
reliable design. The Bridged RB-TA3020-X boards have been optimized for 4Ω and 2Ω load
applications. All three of the Bridged RB-TA3020-X boards have been designed to be 1Ω stable,
however the current limit has been set by the OCR resistors (R111 and R211) to not allow the
output to achieve maximum power in order to remain in the safe operating area. If a 1Ω load is
connected to the output, the amplifier will continue to function but will go into an overcurrent
mode when driving a presumable amount of power. For the Bridged RB-TA3020-1 board with a
1Ω load connected to the output, the amplifier will enter the overcurrent mode and shutoff at
approximately 500W. For the Bridged RB-TA3020-2 board with a 1Ω load connected to the
output, the amplifier will enter the overcurrent mode and shutoff at approximately 800W. For the
Bridged RB-TA3020-3 board with a 1Ω load connected to the output, the amplifier will enter the
overcurrent mode and shutoff at approximately 675W. To reset the amplifier after an overcurrent
condition, the mute pin (pin 24) must be toggled or the power supplies must by cycled off and on
to enable the amplifier.
The Bridged RB-TA3020-1 is optimized for a +/-30V power supply and will function from a
minimum of +/-23V to a maximum of +/-36V. At +/-30V the Bridged RB-TA3020-1 will sufficiently
drive a 4Ω and 2Ω load as shown in the Typical Performance graphs.
The Bridged RB-TA3020-2 is optimized for a +/-43V power supply and will function from a
minimum of +/-30V to a maximum of +/-48V. At +/-43V the Bridged RB-TA3020-2 will sufficiently
drive a 4Ω and 2Ω load as shown in the Typical Performance graphs. However with 2Ω load
conditions the amplifier will shutdown if pushed beyond 1200W. In order for the amplifier to
achieve the full output signal swing, the power supply must be reduced to +/- 33V. This will allow
the amplifier to achieve 950W at 10% THD+N with a 2Ω load.
The Bridged RB-TA3020-3 is optimized for a +/-60V power supply and will function from a
minimum of +/-40V to a maximum of +/-64V. At +/-60V the Bridged RB-TA3020-3 will sufficiently
drive a 4Ω and 2Ω load as shown in the Typical Performance graphs. However, with a 2Ω load,
the amplifier will shutdown if pushed beyond 1500W. In order for the amplifier to achieve the full
output signal swing, the power supply must be reduced to +/- 43V. This will allow the amplifier to
achieve 1500W at 10% THD+N with a 2Ω load.
These limitations placed on the amplifier are to ensure the system will remain in the safe
operating area. Changing the values of the OCR resistors (R211 and R111) will change the
overcurrent trip point and thus increase or reduce output power. It is not recommended to
increase the overcurrent trip point to increase the output power, otherwise reliability will be
reduced in the system. For formulas on how to set the overcurrent trip point, please refer to the
TA3020 datasheet.
The safe operating area is dependent upon the power dissipation, the operating ambient
temperature and the heatsinking. As an example, if the Bridged RB-TA3020-3 board is operating
at +/-60V with a 2Ω load. At 400W the amplifier is 68% efficient and the eight output FETs will be
dissipating approximately 133W. Each of the output FETs will be dissipating approximately 17W.
To operate at an ambient temperature of 20OC, the heatsink needs to be be able to keep the
output FETS below the maximum junction temperature of 150OC.
(Maximum Junction Temperature for Output FETs – ambient temperature)/Power dissipated =
θJA of the heatsink
150OC - 20OC = 130OC
130OC / 133W = 0.98OC/W
13
Bridged RB-TA3020-1-3 – MC/1.0/06-01, EAD003
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
In order to run the amplifier at 400W into a 2Ω load continuously at 20OC for an infinite amount of
time, a θJA of 0.98OC/W heatsink is required.
In an application such as a car audio trunk mounted amplifier, where the ambient temperature
can run up to 85OC:
150OC - 85OC = 65OC
65OC / 133W = 0.49OC/W
A θJA of 0.49OC/W heatsink is required in order to operate the amplifier at 400W into a 2Ω load
continuously at 85OC for an infinite amount of time.
The θJA of every heatsink indicates the thermal properties for an infinite amount of time, therefore
a characterization of each heatsink should be done to plot the θJA vs time. This will provide
information for the heatsink characteristics for power dissipation capabilities for a given finite
amount of time.
A system fan can be used to help increase the efficiency of the heatsink. Additional FETs cannot
be added to the RB-TA3020-2 and RBTA3020-3 boards to help the power dissipation because
the TA3020 cannot reliably drive more than 150nC.
14
Bridged RB-TA3020-1-3 – MC/1.0/06-01, EAD003
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
ARCHITECTURE
A block diagram of the evaluation board is shown in Figure 4. The major functional blocks of the
amplifier are described below.
Positive Output
In
Input
Stage
Output
Section
TA3020-65
Negative Output
Figure 4
Note: The negative output is identical to the positive output with 180 degrees phase shift.
Input Stage
Figure 5 shows Input Stage before the TA3020. The TA3020 amplifier is designed to accept
unbalanced inputs. For the Bridged RB-TA3020-1, the gain is 12.2 V/V differentially, or
approximately 22 dB. For the Bridged RB-TA3020-2, the gain is 16.8 V/V differentially, or
approximately 24.5 dB. For the Bridged RB-TA3020-3, the gain is 23.8 V/V differentially, or
approximately 27.5 dB. Please note that the input stage of the TA3020 is biased at approximately
2.5VDC. For an input signal centered at ground (0VDC), the polarity of the coupling capacitor,
CIN, shown in Figure 5 is correct.
CIN
4.7uF
+
RIN
49.9KΩ
IN2
20
VP2
21
BIASCAP
19
+
RF
20KΩ
CB
0.1uF
V5
499KΩ
10KΩ
Pot
499KΩ
VP1 26
RF
20KΩ
0.1uF
IN1
25
+
-
RIN1
20KΩ
Figure 5
15
Bridged RB-TA3020-1-3 – MC/1.0/06-01, EAD003
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
The audio signal is input through pin 20 and fed through an inverting op amp. The output of this
op amp (pin 21) is tied to the input a unity gain inverting op amp. This configuration of cascading
two inverting op amps results in two input signals to the amplifier of equal amplitude and 180
degrees phase shift without the need of an external op amp.
The value of the input capacitor, CIN, in Figure 5 (labeled C200 on the schematic), and the input
resistor, RIN (labeled R200 on the schematic), sets the –3dB point of the input high-pass filter.
The frequency of the input high pass pole, F3dB, –3dB point can be calculated as follows:
F3dB = 1/(2π x CIN x RIN )
where: CIN = input capacitor value in Farads
RIN = input resistor value in Ohms
Output offset voltages can be nulled by adjusting the 10kΩ potentiometer shown in Figure 5.
Once set, the offset does not typically drift with temperature, so no tracking circuitry is required.
Offsets can typically be set to +/- 25 mV. The output offset is trimmed differentially across the
positive and negative outputs, thus only one channel needs the offset trimmed. If a different
TA3020 is placed in the Bridged RB-TA3020 evaluation board, the offset would need to be retrimmed.
EB-TA3020 Control Circuitry
The MUTE pin is brought out to an external 2-pin header, J3 (Figure 6). When a jumper is
installed from Pin 1 to 2 of J3, the MUTE line is pulled to ground and the outputs are enabled.
Note that if the MUTE jumper is removed, the MUTE pin floats high, and the amplifier is muted.
ROCR
OCR1
33
+5V
R111
BBM0
22
J5
J3
MUTE
24
C116
AGND
OCR2
31
R211
+5V
23
BBM1
J4
C216
Figure 6
The resistors, ROCR in Figure 6 (labeled R111 and R211 in the schematic), set the overcurrent
threshold for the output devices. Note that these are NOT the sense resistors (the overcurrent
sense resistors, RS, are in the output stage). By adjusting the ROCR resistor values, the threshold
at which the amplifier “trips” can be changed. The range that the overcurrent trip point can be
adjusted (by changing ROCR) is determined by the value of the sense resistors.
ROCR on this evaluation board is pre-set for a 4Ω and 2Ω bridged load application. For lower
impedance applications (i.e. 1Ω bridged), this board’s overcurrent will trip. This is indicated by the
amplifier going into mute and the HMUTE pin will latch to 5V; to clear this condition, toggle the
mute or cycle the power. To reduce overcurrent sensitivity, decrease the value of ROCR until the
sensitivity meets the desired level. R OCR can be reduced though this may result in an
overcurrent threshold that is so high the amplifier will try to drive a short circuit, possibly
damaging the output FETs.
16
Bridged RB-TA3020-1-3 – MC/1.0/06-01, EAD003
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
Finally, the Break-Before-Make (or “BBM”) lines are used to control the “dead time” of the output
FETs. The “dead time” is the period of time between the turn-off of one device and the turn-on of
the opposite device on the same channel. If the two devices are both on at the same time,
current “shoots through” from one supply to the other, bypassing the load altogether. Obviously,
this will have a great impact on the overall efficiency of the amplifier. However, if the dead time is
too long, linearity suffers. The optimum BBM setting will change with different output FETs,
different operating voltages, different layouts and different performance requirements. For this
reason, Tripath has provided a means to adjust the BBM setting among four preset levels by
moving jumpers J2 and J3 on their 3-pin headers (see Figure 6).
These settings should be verified over the full temperature and load range of the application to
ensure that any thermal rise of the output FETs and TA3020 does not impact the performance of
the amplifier. The RB-TA3020-1 and RBTA3020-2 amplifier boards is set to 80nS and the RBTA3020-3 is set to 120nS. The table below shows the BBM values for various settings of the
jumpers (Figure 7).
1)
2)
3)
4)
BBM1
BBM0
Delay
0
0
1
1
0
1
0
1
120nS
80nS
40nS
0nS
J5
J4
0
0
1
1
BBM0
BBM1
Note: The jumper setting shown is 80nS.
Figure 7
Auto Recovery Circuit for Overcurrent Fault Condition
If an overcurrent fault condition occurs the HMUTE pin (pin 15) will be latched high and the
amplifier will be muted. The amplifier will remain muted until the MUTE pin (pin 24) is toggled high
and then low or the power supplies are turned off and then on again. The circuit shown below in
Figure 8 is a circuit that will detect if HMUTE is high and then toggle the mute pin high and then
low, thus resetting the amplifier. The LED, D1 will turn on when HMUTE is high. The reset time
has been set for approximately 2.5 seconds. The duration of the reset time is controlled by the
RC time constant set by R306 and C311. To increase the reset, time increase the value of C311.
To reduce the reset time, reduce the value of C311. Please note that this circuit is optional and in
not included on the RB-TA3020-X boards.
17
Bridged RB-TA3020-1-3 – MC/1.0/06-01, EAD003
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
V5
D1
R311
LED 1kΩ, 5%
R307
10kΩ, 5%
R306
510kΩ, 5%
R309
1kΩ, 5%
R308
10kΩ, 5%
Q305
2N3906
R311
1kΩ, 5%
HMUTE
Pin 15
R311
1kΩ, 5%
MUTE
Pin 24
C311
10uF, NP
Q302
2N3904
Q303
2N7002
Jumper
Q304
2N3904
R310
1kΩ, 5%
remove jumper to
enable mute
AGND
Figure 8
Output Section
The output section includes the gate resistors, gate diodes, source resistors, FETs, output filters,
the previously mentioned overvoltage sense resistors, a Zobel Network, the common mode
capacitor, the common mode zobel network and various bypass capacitors. Figure 8 below
shows the output stage of the positive output of this amplifier. The negative output section was
not included in order to simplify the explaination of the output section. The negative output section
will be symmetrical in terms of component values, component placements, and overall
functionality.
OCS1HN
R115
0.01Ω
D104
HO1COM
R118
499kΩ
5.6Ω
LO1COM
R119
499kΩ
C110
0.1uF
C109
330uF
C111
330uF
5.6Ω
M101
R114
LO1
C108
0.1uF
R124
D105
VPP
M100
R113
HO1
OCS1HP
5.6Ω
R125
L100
11uH
5.6Ω
AMPOUT 1
D106
R120
C117
0.22uF
C114
0.1uF
M102
R128
20Ω
5.6Ω
R126
D107
R121
5.6Ω
M103
5.6Ω
R127
R115
0.01Ω
VNN
5.6Ω
C112
0.1uF
OCS1LN
OCS1LP
C113
330uF
Figure 9
18
Bridged RB-TA3020-1-3 – MC/1.0/06-01, EAD003
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
The gate resistors (labeled R113, R114, R120, and R121 in Figure 9 and the attached schematic)
are used to control MOSFET switching rise/fall times and thereby minimize voltage overshoots.
They also dissipate a portion of the power resulting from moving the gate charge each time the
MOSFET is switched. If RG is too small, excessive heat can be generated in the driver. Large
gate resistors lead to slower gate transitions resulting in longer rise/fall times and thus requiring a
larger BBM setting.
The gate diodes (D104, D105, D106, D107) are used to reduce the fall time at the gate of the
output FETs. This allows us to use the 5.6Ω gate resistor, which increases the rise time of the
gate, reduces switching noise at the output FETs and reduce the overall noise floor of the amplifier.
The source resistors (R124, R125, R126, R127) are recommended to protect the TA3020 from
any overvoltage damage. The source resistors provide protection to the HO1COM and LO1COM
pins due to the large overshoots and undershoots of the switching waveform that can occur at the
output during high power operation.
R118 and R119 are gate pull down resistors to ensure the output FETs remain off if VPP and
VNN are powered on and the TA3020 is not powered on. 499kΩ is the ideal value for these
resistors. Larger values of R118 and R119 can cause the gate of the output FETs to float and
smaller values of R118 and R119 will affect the drive capabilities of the HO1 and LO1 pins.
The output FETs (M100, M101, M200 and M201) provide the switching function required of a
Class-T design. They are driven directly by the TA3020 through the gate resistors. M100 and
M102 are placed in parallel and provide the high side drive of the output stage. M101 and M103
are in parallel and provide the low side drive of the output stage. The FETs are required to be
placed in parallel for the purposes of higher current handling capability and improved power
dissipation. (Note: Bridged RBTA3020-1 does not have M101 and M103 and it’s associated
components because it has a lower power output) The devices used on the evaluation board are
STW34NB20 MOSFETs. The TA3020 data sheet contains information on output FET selection as
well as Tripath application notes “FETs – Selection and Efficiency” and “Designing with Switching
Amplifiers for Performance and Reliability”.
The output filter L100/C114 is the low-pass filter that recovers the analog audio signal. One of the
benefits of the Class-T design is the ability to use output filters with relatively high cutoff
frequencies. This greatly reduces the speaker interactions that can occur with the use of lowerfrequency filters common in Class-D designs. Also, the higher-frequency operation means that
the filter can be of a lower order (simpler and less costly).
The OEM may benefit from some experimentation in the filter design, but the values provided in
the reference design, 11uH, 0.1uF, 0.22uF (nominal resonant frequency of 65kHz), provide
excellent results for most loads between 2Ω and 4Ω. Figure 10 below shows the SPICE simultion
results for the output filter used on the Bridged RB-TA3020-3 board with a 4Ω load. Figure 11
below shows the SPICE simulation results for the output filter used on the Bridged RB-TA3020-3
board with a 2Ω load. The Y axis of the graph is in units of dB referred to 1V. The X axis of the
graph is in units of Hz. All of the Bridged RB-TA3020-X boards will have the same frequency
response, however the gains will be different.
19
Bridged RB-TA3020-1-3 – MC/1.0/06-01, EAD003
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
Figure 10
Figure 11
As important as the values themselves, the material used in the core is important to the performance of
the filter. Core materials that saturate easily will not provide acceptable distortion or efficiency
figures. Tripath recommends a low-mu core, like type 2 iron powder core. Micrometals,
(www.micrometals.com), is a main supplier of iron powder cores. The core part number used on
the Bridged RB-TA3020-1 and the Bridged RB-TA3020-2 is T106-2. The core part number used
on the Bridged RB-TA3020-3 is T157-2.
The Zobel circuit R128/C117 is used in case the amplifier is powered up with no load attached.
The Q of the LC output filter, with no load attached, rises quickly out to 80kHz. Resonant currents
20
Bridged RB-TA3020-1-3 – MC/1.0/06-01, EAD003
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
in the filter and ringing on the output could reduce the reliability of the amplifier. The Zobel
eliminates these problems by reducing the Q of the network significantly above 50kHz. Modifying
the LC output filter will require a recalculation of the Zobel value, and depending on the
application, the power capability of R117 and R217 may need to be increased to 10W from 5W.
The components used on the evaluation board should be adequate for most applications.
C5
0.22uF
AMPOUT 2
AMPOUT 1
R6
20Ω, 5W
C6
0.22uF
Figure 12
Figure 12 shows the differential filter network. The differential capacitor, C5, is used to reduce
any of the differential switching components between the positive and negative outputs. Similar to
the zobel circuit, the common mode zobel network, is used in case the amplifier is powered up
with no load attached to the output. The common mode LC output filter formed by L100, L200 and
C5 has a Q that rises quickly out to 80kHz. Common mode resonant currents in the filter and
ringing on the output could reduce the reliability of the amplifier. This common mode zobel
network reduces the Q of the common mode LC output filter significantly above 50kHz.
The bypass capacitors C108/C109 are critical to the reduction of ringing, overshoots, and
undershoots on the outputs of the FETs. These parts are placed as closely as possible to the
leads of the FETs, and the leads of the capacitors themselves are as short as practical. Their
values will not change with different output FETs.
Differences between the Bridged RB-TA3020-X boards
The Bridged RB-TA3020-X boards can be directly implemented into a system. They were
intended to be scalable and modular to help simplify the manufacturing of multiple systems with
varying output power. This is the reason there are three boards for three different power levels
that use identical PC boards. The differences between the three boards are changes in resistor
values and capacitor voltages. Please refer to the bill of materials that is attached at the end of
this document for the actual values of components used for each board.
DOCUMENTATION
Schematics and layout in software or paper form can be provided upon request.
21
Bridged RB-TA3020-1-3 – MC/1.0/06-01, EAD003
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
ADVANCED INFORMATION
This is a product in development. Tripath Technology, Inc. reserves the right to make any changes
without further notice to improve reliability, function and design.
Tripath and Digital Power Processing are trademarks of Tripath Technology, Inc. Other trademarks
referenced in this document are owned by their respective companies.
Tripath Technology, Inc. reserves the right to make changes without further notice to any products
herein to improve reliability, function or design. Tripath does not assume any liability arising out of the
application of use of any product or circuit described herein; neither does it convey any license under its
patent rights nor the rights of others.
TRIPATH’S PRODUCT ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE
SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN CONSENT OF THE
PRESIDENT OF TRIPATH TECHONOLOGY, INC. As used herein:
1.
2.
Life support devices or systems are devices or systems which, (a) are intended for surgical
implant into the body, or (b) support or sustain life, and whose failure to perform, when
properly used in accordance with instructions for use provided in this labeling, can be
reasonably expected to result in significant injury of the user.
A critical component is any component of a life support device or system whose failure to
perform can be reasonably expected to cause the failure of the life support device or system,
or to affect its safety or effectiveness.
Contact Information
TRIPATH TECHNOLOGY, INC
2560 Orchard Parkway, San Jose, CA 95131
408.750.3000 - P
408.750.3001 - F
For more Sales Information, please visit us @ www.tripath.com/cont_s.htm
For more Technical Information, please visit us @ www.tripath.com/data.htm
22
Bridged RB-TA3020-1-3 – MC/1.0/06-01, EAD003
1
2
3
4
5
6
D
D
VPP
C211
390uF/50V
VNN
R215
0.01OHM/1W
C210
C208
0.1uF/250V/EF
0.1uF/250V/EF
R115
C8
100uF/16V
D204
NS
M200
NS
I1
VN10
1
R213
D104
NS
VN10
LO1
48
2
J202
M201
STW34NB20
3
R214
4
2
HO2COM
HO1
HO2
OCS1HN
CON4
FB1
44
R125
C105
0.1uF/250V/EB
5.6OHM/1W
1
6
7
OCS2LN
OCS1HP
1
43
OCS2LP
OCS1LP
OCS2HP
OCS1LN
D106
1N914
42
C106
0.1uF/250V/EB
R220
R228
20OHM/5W
8
5.6OHM/1W
PGND2
M203
NS
5.6OHM/1W
D207
NS
C204
47uF/25V
OCS2HN
VBOOT1
R120
VBOOT2
VNN
220OHM
C103
0.1uF
10
R126
40
39
5.6OHM/1W
D107
NS
VNN
R221
C209
330uF/100V
VNN
C213
390uF/50V
R216
0.01OHM/1W
R128
20OHM/5W
PGND1
C104
47uF/25V
D202
MURS120T3
C203
0.1uF
AMPOUT1
C117
0.22uF/100V/PPS
C114
0.1uF/100V/PPS
5.6OHM/1W
D102
MURS120T3
9
220OHM
2
M102
STW34NB20
R112
41
C205
0.1uF/250V/EB
R212
R226
C
L100
11uH
5.6OHM/1W
C206
0.1uF/250V/EB
D206
1N914
M101
STW34NB20
R114
45
5.6OHM/1W
5
M202
STW34NB20
J102
NS
D105
1N914
46
R218
510K
R225
C214
0.1uF/100V/PPS
HO1COM
47
R118
510K
5.6OHM/1W
C217
0.22uF/100V/PPS
LO2COM
C111
390uF/50V
R124
NS
D205
1N914
CON4
AMPOUT2
LO1COM
C110
0.1uF/250V/EF
C108
0.1uF/250V/EF
NS
R219 C207
510K 0.1uF
FB2
L200
11uH
LO2
R119
510K
VPP
0.01OHM/1W
R113
C107
0.1uF
NS
R224
M100
NS
C
M103
NS
R121
NS
V5
R227
NS
R106
11
R105
1K,1%
C212
0.1uF/250V/EF
NC
AGND
FB1
12
OCRNT2
7.5K,1%
C102
150pF
NC
NS
38
OCR2
OCR1
37
C109
330uF/100V
R127
NS
AGND
R116
0.01OHM/1W
VNN
OCRNT1
C112
0.1uF/250V/EF
R107
1.15K,1%
FN1
13
FBKOUT1
NC
FBKGND1
V5
C113
390uF/50V
36
AGND
AGND
14
35
V5
BRIDGED OUTPUT
C3
0.1uF
15
HMUTE
HMUTE
DGND
V5
R206
C5
AMPOUT2
34
AGND
R205
1K,1%
FN2
16
FBKOUT2
OCR1
33
17
R207
1.15K,1%
R208
1K,1%
R209
DCOMP
REF1
32
R1
8.25K,1%
AGND
FP2
PGND2
18
FBKGND2
OCR2
R210
1.15K,1%
AGND
19
BIASCAP
VNNSENSE
OCRNT2
AGND
C200
4.7uF
R200
49.9K,1%
AGND
R211
13.3K,1%
B
VNN
30
0.1uF
J200
J101
SCRWTERM
C6
AGND
C216
220pF
C4
R6
20OHM/5W 0.22uF/100V/PPS
R111
13.3K,1%
31
7.5K,1%
B
AMPOUT1
0.22uF/100V/PPS
OCRNT1
C116
220pF
FB2
7.5K,1%
C202
270pF
J201
SCRWTERM
R3
237K,1%
AGND
AGND
IN2
R201
20K,1%
20
INV2
VPPSENSE
29
VPP
C201
33pF
J5
R9
715K,1%
R5
261K,1%
VP2 21
OAOUT2
AGND
BBM0
V5
BBM1
OAOUT1
C1
AGND
0.1uF
V5
22
SET BBM0 T0 1
27
J2
VPP
VN10
VNN
28
R4
261K,1%
V5
CON6
V5
J4
23
SET BBM1 T0 0
24
J3
MUTE
REMOVE J3 SHUNT TO ENABLE MUTE
MUTE
INV1
5V INPUT CONNECTOR
J1
V5
26
C101
33pF
R7
1K
25
R101
20K,1%
IN1
R100
VP2
AGND
20K,1%
AGND
TA3020
L1
FBEAD
1
R103
R102
2
510K
510K
C120
0.1uF
AGND
A
V5
OFFSET TRIM
R104
10K POT
A
AGND
Title
TA3020 BRIDGED REFERENCE BOARD - 1 - 23V TO 36V
Size
Number
Revision
3.0
C
Date:
File:
1
2
3
4
5
12-Jul-2001
Sheet of
C:\LAYOUTS\TA3020\3020SUB3\BR3020_1.SCH
Drawn By:
6
C:\LAYOUTS\TA3020\3020SUB3\BR3020_1.BOM 11:13:42 12-Jul-2001
Bill of Material for Bridged RB-TA3020-1, Rev 3.0
Used Part Type
Designator
Footprint
Part Field 1
Part Field 2 Part Field 3
==== =============== ==================== =========== =================== ============ ===============
4
0.01OHM/1W
R115 R116 R215 R216 RLVR1RG2
OHMITE
12F010
DK 12F010-ND
8
0.1uF
C1 C103 C107 C120
0805
20% TOL.
*
*
C203 C207 C3 C4
2
0.1uF/100V/PPS C114 C214
C0U22PPS10 PANASONIC
ECH-S1104JZ DK PS1104J-ND
4
0.1uF/250V/EB
C105 C106 C205 C206 C0U1MF10
PANASONIC
ECQ-E2104KB DK P10967-ND
6
0.1uF/250V/EF
C108 C110 C112 C208 C0U1MF10
PANASONIC
ECQ-E2104KF EF2104-ND
C210 C212
4
0.22uF/100V/PPS C117 C217 C5 C6
C0U22PPS10 PANASONIC
ECH-S1224JZ DK PS1224J-ND
3
1.15K,1%
R107 R207 R210
0805
*
*
*
1
100uF/16V
C8
C10UEL05
PANASONIC
ECA-1CHG101 DK P5529-ND
1
10K POT
R104
POTSTURN
BOURNS
3306P-1-103 DK 3306P-103-ND
2
11uH
L100 L200
T106
COIL WINDING SPEC
T106-2 CORE 29TURNS / 16AWG
2
13.3K,1%
R111 R211
0805
*
*
*
1
150pF
C102
0805
NPO 5%
*
*
1
1K
R7
0805
5%
*
*
3
1K,1%
R105 R205 R208
0805
*
*
*
4
1N914
D105 D106 D205 D206 1N914L
*
3
20K,1%
R100 R101 R201
0805
*
*
*
3
20OHM/5W
R128 R228 R6
PWR5WRT
XICON
280-PRM5-20
2
220OHM
R112 R212
RES1W50
5%, 1/4W
2
220pF
C116 C216
0805
NPO 5%
*
*
1
237K,1%
R3
0805
*
*
*
2
261K,1%
R4 R5
0805
*
*
*
1
270pF
C202
0805
NPO 5%
*
*
2
330uF/100V
C109 C209
C330UEL10
PANASONIC
EEU-FC2A331S DK P10783-ND
2
33pF
C101 C201
0805
NPO 5%
*
*
4
390uF/50V
C111 C113 C211 C213 C100UEL06
PANASONIC
EEU-FC1H391S DK P10327-ND
1
4.7uF
C200
C10UEL05
PANASONIC
ECA-1HHG4R7 DK P5566-ND
2
47uF/25V
C104 C204
C10UEL05
PANASONIC
ECA-1HHG220 DK P5568-ND
1
49.9K,1%
R200
0805
*
*
*
8
5.6OHM/1W
R114 R120 R125 R126 RES1W50
PANASONIC
ERG-1SJ5R6
P5.6W-1BK-ND
R214 R220 R225 R226
6
510K
R102 R103 R118 R119 0805
5% TOL.
*
*
R218 R219
3
7.5K,1%
R106 R206 R209
0805
*
*
*
Page 1
C:\LAYOUTS\TA3020\3020SUB3\BR3020_1.BOM 11:13:42 12-Jul-2001
1
1
1
1
2
1
1
1
2
2
16
715K,1%
8.25K,1%
CON2INPT
CON2LPWR
CON4
CON6
FBEAD
HDR2
HDR3
MURS120T3
NS
2
4
1
SCRWTERM
STW34NB20
TA3020
R9
R1
J200
J1
J102 J202
J2
L1
J3
J4 J5
D102 D202
D104 D107 D204 D207
M100 M103 M200 M203
R113 R121 R124 R127
R213 R221 R224 R227
J101 J201
M101 M102 M201 M202
I1
0805
0805
CON2
CON2B
BUSBAR1
PWRCON6
2512
GJMPR001
GJMP3001
SMB
1N914L
*
*
WALDOM
WALDOM
*
*
SPC/MULTICOMP
*
*
MOTOROLA
*
*
705-43-0001
22-23-2021
*
*
SPC5304
*
*
MURS120T3
SCRWTERM
*
*
TO3P&220FLT ST MICROELECTRONICS *
DIP48
TRIPATH
*
*
*
DK WM4800-ND
DK WM4200-ND
*
*
Newark - 50N670
*
*
*
*
*
*
*
1
2
3
4
5
6
D
D
VPP
C211
470uF/63V
VNN
R215
0.01OHM/1W
C210
C208
0.1uF/250V/EF
0.1uF/250V/EF
M200
STW34NB20
R115
C8
100uF/16V
D204
1N914
I1
VN10
1
R213
D104
1N914
VN10
LO1
48
2
J202
M201
STW34NB20
3
R214
4
2
HO2COM
HO1
HO2
OCS1HN
CON4
FB1
44
R125
C105
0.1uF/250V/EB
5.6OHM/1W
1
6
7
OCS2LN
OCS1HP
1
43
OCS2LP
OCS1LP
OCS2HP
OCS1LN
D106
1N914
42
C106
0.1uF/250V/EB
R220
R228
20OHM/5W
8
10OHM/1W
PGND2
M203
STW34NB20
5.6OHM/1W
D207
1N914
C204
47uF/25V
OCS2HN
VBOOT1
R120
VBOOT2
VNN
220OHM
C103
0.1uF
10
R126
40
39
5.6OHM/1W
D107
1N914
VNN
R221
C209
220uF/160V
VNN
C213
470uF/63V
R216
0.01OHM/1W
R128
20OHM/5W
PGND1
C104
47uF/25V
D202
MURS120T3
C203
0.1uF
AMPOUT1
C117
0.22uF/100V/PPS
C114
0.1uF/100V/PPS
510OHM/1W
D102
MURS120T3
9
220OHM
2
M102
STW34NB20
R112
41
C205
0.1uF/250V/EB
R212
R226
C
L100
11uH
5.6OHM/1W
C206
0.1uF/250V/EB
D206
1N914
J102
M101
STW34NB20
R114
45
510OHM/1W
5
M202
STW34NB20
5.6OHM/1W
D105
1N914
46
R218
510K
R225
C214
0.1uF/100V/PPS
HO1COM
47
R118
510K
10OHM/1W
C217
0.22uF/100V/PPS
LO2COM
C111
470uF/63V
R124
5.6OHM/1W
D205
1N914
CON4
AMPOUT2
LO1COM
C110
0.1uF/250V/EF
C108
0.1uF/250V/EF
10OHM/1W
R219 C207
510K 0.1uF
FB2
L200
11uH
LO2
R119
510K
VPP
0.01OHM/1W
R113
C107
0.1uF
10OHM/1W
R224
M100
STW34NB20
C
M103
STW34NB20
R121
10OHM/1W
V5
R227
5.6OHM/1W
R106
11
R105
1K,1%
C212
0.1uF/250V/EF
NC
AGND
FB1
12
OCRNT2
10.5K,1%
C102
75pF
NC
10OHM/1W
38
OCR2
OCR1
C109
220uF/160V
R127
5.6OHM/1W
AGND
37
R116
0.01OHM/1W
VNN
OCRNT1
C112
0.1uF/250V/EF
R107
1.10K,1%
FN1
13
FBKOUT1
NC
FBKGND1
V5
C113
470uF/63V
36
AGND
AGND
14
35
V5
BRIDGED OUTPUT
C3
0.1uF
15
HMUTE
HMUTE
DGND
V5
R206
C5
AMPOUT2
34
AGND
R205
1K,1%
FN2
16
FBKOUT2
OCR1
33
17
R207
1.10K,1%
R208
1K,1%
R209
DCOMP
REF1
32
R1
8.25K,1%
AGND
FP2
PGND2
18
FBKGND2
OCR2
R210
1.10K,1%
AGND
19
BIASCAP
VNNSENSE
AGND
C200
4.7uF
R200
49.9K,1%
AGND
J101
SCRWTERM
OCRNT2
R211
12.3K,1%
B
VNN
30
0.1uF
J200
C6
AGND
C216
220pF
C4
R6
20OHM/5W 0.22uF/100V/PPS
R111
12.3K,1%
31
10.5K,1%
B
AMPOUT1
0.22uF/100V/PPS
OCRNT1
C116
220pF
FB2
10.5K,1%
C202
180pF
J201
SCRWTERM
R3
316K,1%
AGND
AGND
IN2
R201
20K,1%
20
INV2
VPPSENSE
29
VPP
C201
33pF
J5
R9
953K,1%
R5
348K,1%
VP2 21
OAOUT2
AGND
BBM0
V5
BBM1
OAOUT1
C1
AGND
0.1uF
V5
22
SET BBM0 T0 0
27
J2
VPP
VN10
VNN
28
R4
348K,1%
V5
CON6
V5
J4
23
SET BBM1 T0 0
24
J3
MUTE
REMOVE J3 SHUNT TO ENABLE MUTE
MUTE
INV1
5V INPUT CONNECTOR
J1
V5
26
C101
33pF
R7
1K
25
R101
20K,1%
IN1
R100
VP2
AGND
20K,1%
AGND
TA3020
L1
FBEAD
1
R103
R102
2
510K
510K
C120
0.1uF
AGND
A
V5
OFFSET TRIM
R104
10K POT
A
AGND
Title
TA3020 BRIDGED REFERENCE BOARD - 2 - 30V TO 48V
Size
Number
Revision
3.0
C
Date:
File:
1
2
3
4
5
12-Jul-2001
Sheet of
C:\LAYOUTS\TA3020\3020SUB3\BR3020_2.SCH
Drawn By:
6
C:\LAYOUTS\TA3020\3020SUB3\BR3020_2.BOM 11:11:54 12-Jul-2001
Bill of Material for Bridged RB-TA3020-2, Rev 3.0
Used Part Type
Designator
Footprint
Part Field 1
Part Field 2 Part Field 3
==== =============== ==================== =========== =================== ============ ===============
4
0.01OHM/1W
R115 R116 R215 R216 RLVR1RG2
OHMITE
12F010
DK 12F010-ND
8
0.1uF
C1 C103 C107 C120
0805
20% TOL.
*
*
C203 C207 C3 C4
2
0.1uF/100V/PPS C114 C214
C0U22PPS10 PANASONIC
ECH-S1104JZ DK PS1104J-ND
4
0.1uF/250V/EB
C105 C106 C205 C206 C0U1MF10
PANASONIC
ECQ-E2104KB DK P10967-ND
6
0.1uF/250V/EF
C108 C110 C112 C208 C0U1MF10
PANASONIC
ECQ-E2104KF EF2104-ND
C210 C212
4
0.22uF/100V/PPS C117 C217 C5 C6
C0U22PPS10 PANASONIC
ECH-S1224JZ DK PS1224J-ND
3
1.10K,1%
R107 R207 R210
0805
*
*
*
3
10.5K,1%
R106 R206 R209
0805
*
*
*
1
100uF/16V
C8
C10UEL05
PANASONIC
ECA-1CHG101 DK P5529-ND
1
10K POT
R104
POTSTURN
BOURNS
3306P-1-103 DK 3306P-103-ND
6
10OHM/1W
R113 R121 R213 R214 RES1W50
PANASONIC
ERG-1SJ5R6
P5.6W-1BK-ND
R220 R221
2
11uH
L100 L200
T106
COIL WINDING SPEC
T106-2 CORE 29TURNS / 16AWG
2
12.3K,1%
R111 R211
0805
*
*
*
1
180pF
C202
0805
NPO 5%
*
*
1
1K
R7
0805
5%
*
*
3
1K,1%
R105 R205 R208
0805
*
*
*
8
1N914
D104 D105 D106 D107 1N914L
*
D204 D205 D206 D207
3
20K,1%
R100 R101 R201
0805
*
*
*
3
20OHM/5W
R128 R228 R6
PWR5WRT
XICON
280-PRM5-20
2
220OHM
R112 R212
RES1W50
5%, 1/4W
2
220pF
C116 C216
0805
NPO 5%
*
*
2
220uF/160V
C109 C209
C330UEL10
PANASONIC
EEU-EB2C221S DK P5910-ND
1
316K,1%
R3
0805
*
*
*
2
33pF
C101 C201
0805
NPO 5%
*
*
2
348K,1%
R4 R5
0805
*
*
*
1
4.7uF
C200
C10UEL05
PANASONIC
ECA-1HHG4R7 DK P5566-ND
4
470uF/63V
C111 C113 C211 C213 C100UEL06
PANASONIC
EEU-FC1J471 DK P10352-ND
2
47uF/25V
C104 C204
C10UEL05
PANASONIC
ECA-1HHG220 DK P5568-ND
1
49.9K,1%
R200
0805
*
*
*
8
5.6OHM/1W
R124 R125 R126 R127 RES1W50
PANASONIC
ERG-1SJ5R6
P5.6W-1BK-ND
R224 R225 R226 R227
Page 1
C:\LAYOUTS\TA3020\3020SUB3\BR3020_2.BOM 11:11:54 12-Jul-2001
6
510K
2
1
1
1
1
1
2
1
1
1
2
2
2
8
510OHM/1W
75pF
8.25K,1%
953K,1%
CON2INPT
CON2LPWR
CON4
CON6
FBEAD
HDR2
HDR3
MURS120T3
SCRWTERM
STW34NB20
1
TA3020
R102 R103 R118 R119
R218 R219
R114 R120
C102
R1
R9
J200
J1
J102 J202
J2
L1
J3
J4 J5
D102 D202
J101 J201
M100 M101 M102 M103
M200 M201 M202 M203
I1
0805
5% TOL.
*
*
RES1W50
PANASONIC
ERG-1SJ5R6
0805
NPO 5%
*
0805
*
*
0805
*
*
CON2
WALDOM
705-43-0001
CON2B
WALDOM
22-23-2021
BUSBAR1
*
*
PWRCON6
*
*
2512
SPC/MULTICOMP
SPC5304
GJMPR001
*
*
GJMP3001
*
*
SMB
MOTOROLA
MURS120T3
SCRWTERM
*
*
TO3P&220FLT ST MICROELECTRONICS *
P5.6W-1BK-ND
*
*
*
DK WM4800-ND
DK WM4200-ND
*
*
Newark - 50N670
*
*
*
*
*
DIP48
*
TRIPATH
*
1
2
3
4
5
6
D
D
VPP
C211
470uF/63V
VNN
R215
0.01OHM/1W
C210
C208
0.1uF/250V/EF
0.1uF/250V/EF
M200
STW34NB20
R115
C8
100uF/16V
D204
1N914
I1
VN10
1
R213
D104
1N914
VN10
LO1
48
2
J202
M201
STW34NB20
3
R214
4
2
HO2COM
HO1
HO2
OCS1HN
CON4
FB1
44
R125
C105
0.1uF/250V/EB
5.6OHM/1W
1
6
7
OCS2LN
OCS1HP
1
43
OCS2LP
OCS1LP
OCS2HP
OCS1LN
D106
1N914
42
C106
0.1uF/250V/EB
R220
R228
20OHM/5W
8
10OHM/1W
PGND2
M203
STW34NB20
5.6OHM/1W
D207
1N914
C204
47uF/25V
OCS2HN
VBOOT1
R120
VBOOT2
VNN
220OHM
C103
0.1uF
10
R126
40
39
5.6OHM/1W
D107
1N914
VNN
R221
C209
220uF/160V
VNN
C213
470uF/63V
R216
0.01OHM/1W
R128
20OHM/5W
PGND1
C104
47uF/25V
D202
MURS120T3
C203
0.1uF
AMPOUT1
C117
0.22uF/250V
C114
0.1uF/100V/PPS
10OHM/1W
D102
MURS120T3
9
220OHM
2
M102
STW34NB20
R112
41
C205
0.1uF/250V/EB
R212
R226
C
L100
11uH
5.6OHM/1W
C206
0.1uF/250V/EB
D206
1N914
J102
M101
STW34NB20
R114
45
10OHM/1W
5
M202
STW34NB20
5.6OHM/1W
D105
1N914
46
R218
510K
R225
C214
0.1uF/100V/PPS
HO1COM
47
R118
510K
10OHM/1W
C217
0.22uF/250V
LO2COM
C111
470uF/63V
R124
5.6OHM/1W
D205
1N914
CON4
AMPOUT2
LO1COM
C110
0.1uF/250V/EF
C108
0.1uF/250V/EF
10OHM/1W
R219 C207
510K 0.1uF
FB2
L200
11uH
LO2
R119
510K
VPP
0.01OHM/1W
R113
C107
0.1uF
10OHM/1W
R224
M100
STW34NB20
C
M103
STW34NB20
R121
10OHM/1W
V5
R227
5.6OHM/1W
R106
11
R105
1K,1%
C212
0.1uF/250V/EF
NC
AGND
FB1
12
OCRNT2
15K,1%
C102
62pF
NC
10OHM/1W
38
OCR2
OCR1
C109
220uF/160V
R127
5.6OHM/1W
AGND
37
R116
0.01OHM/1W
VNN
OCRNT1
C112
0.1uF/250V/EF
R107
1.07K,1%
FN1
13
FBKOUT1
NC
FBKGND1
V5
C113
470uF/63V
36
AGND
AGND
14
35
V5
BRIDGED OUTPUT
C3
0.1uF
15
HMUTE
HMUTE
DGND
V5
R206
C5
AMPOUT2
34
AGND
R205
1K,1%
FN2
16
FBKOUT2
OCR1
33
17
R207
1.07K,1%
R208
1K,1%
R209
DCOMP
REF1
32
R1
8.25K,1%
AGND
FP2
PGND2
18
FBKGND2
OCR2
R210
1.07K,1%
AGND
19
BIASCAP
VNNSENSE
OCRNT2
AGND
C200
4.7uF
R200
49.9K,1%
AGND
R211
11.3K,1%
B
VNN
30
0.1uF
J200
J101
SCRWTERM
C6
AGND
C216
220pF
C4
R6
20OHM/5W 0.22uF/250V
R111
11.3K,1%
31
15K,1%
B
AMPOUT1
0.22uF/250V
OCRNT1
C116
220pF
FB2
15K,1%
C202
150pF
J201
SCRWTERM
R3
422K,1%
AGND
AGND
IN2
R201
20K,1%
20
INV2
VPPSENSE
29
VPP
C201
33pF
J5
R9
1.27M,1%
R5
464K,1%
VP2 21
OAOUT2
AGND
BBM0
V5
BBM1
OAOUT1
C1
AGND
0.1uF
V5
22
SET BBM0 T0 0
27
J2
VPP
VN10
VNN
28
R4
464K,1%
V5
CON6
V5
J4
23
SET BBM1 T0 0
24
J3
MUTE
REMOVE J3 SHUNT TO ENABLE MUTE
MUTE
INV1
5V INPUT CONNECTOR
J1
V5
26
C101
33pF
R7
1K
25
R101
20K,1%
IN1
R100
VP2
AGND
20K,1%
AGND
TA3020
L1
FBEAD
1
R103
R102
2
510K
510K
C120
0.1uF
AGND
A
V5
OFFSET TRIM
R104
10K POT
A
AGND
Title
TA3020 BRIDGED REFERENCE BOARD - 3 - 40V TO 64V
Size
Number
Revision
3.0
C
Date:
File:
1
2
3
4
5
12-Jul-2001
Sheet of
C:\LAYOUTS\TA3020\3020SUB3\BR3020_3.SCH
Drawn By:
6
C:\LAYOUTS\TA3020\3020SUB3\BR3020_3.BOM 11:10:31 12-Jul-2001
Bill of Material for Bridged RB-TA3020-3, Rev 3.0
Used Part Type
Designator
Footprint
Part Field 1
Part Field 2 Part Field 3
==== ============== ==================== =========== =================== ============ ===============
4
0.01OHM/1W
R115 R116 R215 R216 RLVR1RG2
OHMITE
12F010
DK 12F010-ND
8
0.1uF
C1 C103 C107 C120
0805
20% TOL.
*
*
C203 C207 C3 C4
2
0.1uF/100V/PPS C114 C214
C0U22PPS10 PANASONIC
ECH-S1104JZ DK PS1104J-ND
4
0.1uF/250V/EB C105 C106 C205 C206 C0U1MF10
PANASONIC
ECQ-E2104KB DK P10967-ND
6
0.1uF/250V/EF C108 C110 C112 C208 C0U1MF10
PANASONIC
ECQ-E2104KF EF2104-ND
C210 C212
4
0.22uF/250V
C117 C217 C5 C6
C0U22PPS10 PANASONIC
ECW-F2224JB DK PF2224-ND
3
1.07K,1%
R107 R207 R210
0805
*
*
*
1
1.27M,1%
R9
0805
*
*
*
1
100uF/16V
C8
C10UEL05
PANASONIC
ECA-1CHG101 DK P5529-ND
1
10K POT
R104
POTSTURN
BOURNS
3306P-1-103 DK 3306P-103-ND
8
10OHM/1W
R113 R114 R120 R121 RES1W50
PANASONIC
ERG-1SJ5R6
P10W-1BK-ND
R213 R214 R220 R221
2
11.3K,1%
R111 R211
0805
*
*
*
2
11uH
L100 L200
T106
COIL WINDING SPEC
T157-2 CORE 28TURNS / 14AWG
1
150pF
C202
0805
NPO 5%
*
*
3
15K,1%
R106 R206 R209
0805
*
*
*
1
1K
R7
0805
5%
*
*
3
1K,1%
R105 R205 R208
0805
*
*
*
8
1N914
D104 D105 D106 D107 1N914L
*
D204 D205 D206 D207
3
20K,1%
R100 R101 R201
0805
*
*
*
3
20OHM/5W
R128 R228 R6
PWR5WRT
XICON
280-PRM5-20
2
220OHM
R112 R212
RES1W50
5%, 1/4W
2
220pF
C116 C216
0805
NPO 5%
*
*
2
220uF/160V
C109 C209
C330UEL10
PANASONIC
EEU-EB2C221S DK P5910-ND
2
33pF
C101 C201
0805
NPO 5%
*
*
1
4.7uF
C200
C10UEL05
PANASONIC
ECA-1HHG4R7 DK P5566-ND
1
422K,1%
R3
0805
*
*
*
2
464K,1%
R4 R5
0805
*
*
*
4
470uF/63V
C111 C113 C211 C213 C100UEL06
PANASONIC
EEU-FC1J471 DK P10352-ND
2
47uF/25V
C104 C204
C10UEL05
PANASONIC
ECA-1HHG220 DK P5568-ND
1
49.9K,1%
R200
0805
*
*
*
8
5.6OHM/1W
R124 R125 R126 R127 RES1W50
PANASONIC
ERG-1SJ5R6
P5.6W-1BK-ND
Page 1
C:\LAYOUTS\TA3020\3020SUB3\BR3020_3.BOM 11:10:31 12-Jul-2001
6
510K
1
1
1
1
2
1
1
1
2
2
2
8
62pF
8.25K,1%
CON2INPT
CON2LPWR
CON4
CON6
FBEAD
HDR2
HDR3
MURS120T3
SCRWTERM
STW34NB20
1
TA3020
R224 R225 R226 R227
R102 R103 R118 R119
R218 R219
C102
R1
J200
J1
J102 J202
J2
L1
J3
J4 J5
D102 D202
J101 J201
M100 M101 M102 M103
M200 M201 M202 M203
I1
0805
5% TOL.
*
*
0805
NPO 5%
*
0805
*
*
CON2
WALDOM
705-43-0001
CON2B
WALDOM
22-23-2021
BUSBAR1
*
*
PWRCON6
*
*
2512
SPC/MULTICOMP
SPC5304
GJMPR001
*
*
GJMP3001
*
*
SMB
MOTOROLA
MURS120T3
SCRWTERM
*
*
TO3P&220FLT ST MICROELECTRONICS *
*
*
DK WM4800-ND
DK WM4200-ND
*
*
Newark - 50N670
*
*
*
*
*
DIP48
*
TRIPATH
*