Freescale Semiconductor, Inc.
MOTOROLA
MC33191
SEMICONDUCTOR
TECHNICAL DATA
12V IGNITION DRIVER
Prototype Information
SILICON MONOLITHIC
INTEGRATED CIRCUIT
Freescale Semiconductor, Inc...
Automotive 12V ignition driver
The MC33191 is for use in 12V ignition systems designed for use in
harsh automotive and industrial applications which require the capability of
handling high voltage attributed to load and Þeld dump transients. In
addition, the device can be used under reverse and double battery
conditions.
The MC33191 is available in a 16 pin narrow body DIP plastic and SO
package.
DW SUFFIX
PLASTIC PACKAGE
CASE 751G
SO-16L
PIN ASSIGNMENT
¥ Designed for Automotive Ignition Application
¥ Continuous System Voltage up to 28.6V
¥ Continuous Operating Ambient Temperature Range from -30°C
to +125°C
¥ Frequency Range from 1Hz to 400 Hz
¥ Coil Current Regulation
¥ Hall Effect and Reluctance Sensor Applications.
Vcc
1
16
Gnd
in+
2
15
ÔÕDÕÕ.
in-
3
14
ÔÕCÕÕ
Isr
4
13
Output
C stall
5
12
H.V.C.
VLS
6
11
I.S.
C25/75
7
10
M.B
Cad
8
9
Vreg
ORDERING INFORMATION
Device
Temperature
Range
Package
MC33191P
-30°C to +125°C
DIL16
SimpliÞed Block Diagram
9
1
Vreg
Series
Reg.
15
10(MB)
12
Band
Gap
Vcc
-
2
1.5KW
Input
+
3
14
13
20mA
Current
sense
80mA
11
LOGIC
Vreg
Vreg
Vreg
6.7mA
Retard
6 mA
5
4
25/75
8 mA
26.8mA
Stall
31.8mA
to
80mA
Slow
Speed
3.2mA
Adapt
dwell
7
6
1.92mA
8
This document contiains information on a new product under development. Motorola reserves
the right to change or discontinue this product without notice.
GND
16
Ó Motorola,Inc
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Date : 10/12/98
Rev : 1.0
Freescale Semiconductor, Inc.
MC33191
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DEVICE PIN OUT IDENTIFICATION
Pin
Function
Pin
Function
1
Vcc
9
V reg
2
Input +
10
Master Bias
3
Input -
11
Current Sense
4
Start Retard I Trim
12
High Voltage Clamp
5
Stall Capacitor
13
Output
6
V Low Speed
14
ÔÕ C ÔÕ
7
25/75 Capacitor
15
ÔÕ D ÔÕ
8
Adaptive Dwell Cap.
16
Master bias
ELECTRICAL REQUIREMENTS The IC performs to the limits of the table between temperature range of - 30°C to +125°C and it operates between the temperature range of - 40°C to +150°C
Symbol
Description
Min
Max
Unit
ICC
I.C.Drain Current
3
5
mA
Vreg
Regulator output voltage
6,5
7,1
V
ICCH
I.C. Drain Current High Voltage
10
mA
Vin (+) P
(+) Input, Positive Clamp
7
8
V
Vin (+) N
(+) Input, Negative Clamp
1
2
V
Vin (-) P
(-) Input, Positive Clamp
7
8
V
Vin (-) N
(-) Input, Negative Clamp
1
2
V
Vin TH
Input Threshold
-25
+25
mA
Vin Hys. RM
Run Mode Hysteresis
280
372
mV
Vin Hys. SS
Slow Speed Hysteresis
54
88
mV
I75
25/75 Current Up
6.2
7.68
mA
I75 / I25
I75 / I25 Current ratio
0.317
0.365
I75 / I ADU
I75 / IADU Current ratio
0.794
0.878
I ADU / IADD
IADU / IADD Current ratio
1.49
1.7
I ADU / IADR
I ADU / I ADR Current ratio
2.35
2.66
VEDR
Reduced Excess Dwell Trip Voltage
15.5
19
I 75 / ISU
I 75 / I SU Current Ratio
1.05
1.27
I SD / I SU
I SD/ I SU Current ratio
3.9
4.95
VHVC
Collector Clamp Voltage
14.4
16.7
V
VCS
Current Sense Voltage
133
185
mV
VOS
Output Saturation Voltage
985
mV
IOLK
Output Leakage Current
25
mA
VOSD
Overvoltage Shutdown Voltage
27
30
V
VSSS
Slow Speed Stall
2.4
3.1
V
MC33191
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MC33191
Figure 1. Test Schematic
Vbat
300W
Vbat
1 Vcc
GND 16
2 In+
ÔÕDÕÕ 15
3 In-
ÔÕCÔÕ 14
4 Isr
OUT 13
5 Cs
Clamp 12
6 Vls
IS 11
5.1KW
68W
Freescale Semiconductor, Inc...
5.1KW
33W
6.8V
500W
7 C25/75
MB 10
8 Cod
Vreg 9
57KW
26KW
Figure 2. Application Circuit (Reluctance Sensor Input)
+
Ign
0.1
200
-
Battery
1/2W
68
2.5W
+Sensor
Reluctance
0.1
Vcc
Ground
16
2
IN+
D
15
3
IN-
4
6.8V
5.0W
Ignition
Coil
5.0k
33
1/4W
-Sensor
0.1
1
C
14
Retard
Output
13
5
Stall
Clamp
12
6
Slow
Speed
Current
Sense
11
Bias
10
5.0k
Q1
200
5k
1.0
400
16k
7
25/75
.05
200/400
400
Gnd
0.1
57k
8
Adaptive
Dwell
Vref
9
0.1
NOTE :
10k
1. Q1 = BUZ111 or Eqivalent
2. T = Trim Resistors
MC33191
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MC33191
Figure 3. Application Circuit (Hall Sensor Input)
85
Hall Voltage
+
Ign
-
Battery
0.1
1.1k
68
2.5W
200
1/2W
18V
Hall Output
100
Vcc
Ground
16
2
IN+
D
15
3
IN-
4
1
Engine
Microcontroller
0.1
Ignition
Coil
6.8V
5.0W
0.1
4.7k
10k
33
Freescale Semiconductor, Inc...
1/4W
C
14
Retard
Output
13
5
Stall
Clamp
12
6
Slow
Speed
Current
Sense
11
Q1
200
5k
5.0k
1.0
400
3.0k
16k
7
5.1k
25/75
Bias
T
.05
10
400
285
T
T
Gnd
0.1
57k
8
Adaptive
Dwell
Vref
9
0.1
10k
NOTE :
1. Q1 = BUZ111 or Eqivalent
2. T = Trim Resistors
MC33191
MOTOROLA
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MC33191
FUNCTIONNAL DESCRIPTION
- No separate start wire into module is required
- Switch occurs at approximatly 12Hz but can be
changed within a narrow region
Application /System Performances
1. Reluctance sensor input.
- Minimum input level of 200mV peak to peak
- Maximum input level of 40V peak to peak
5. Input noise immunity is provided by hysteresis on the
input comparator.
- 100mV of hysteresis is in slow speed mode
- 500mV of hysteresis in run mode
2. Hall sensor input
- Open collector output desirable.
- Input level of 0.5V to Vbat
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3. Operating voltage range
- Normal range from 9V to 16V.
-Operational range with some
parameters from 6V to 24V.
modiÞcations
to
4. Transient considerations
- Load dumps should not exceed +90V peak with 250ms
time constant.
- Field decay should not exceed -90V peak with 25ms
time constant.
5. Operating temperature range
- Continuous operation : -30°C to 125°C
6. Rate of acceleration should not exceed 250Hz/s from
20Hz to 300Hz (input frequency). If this is exceeded the
module will still function but an occasional spark may be
missed and dwell calculations will be negated for one or two
output cycles.
7. Normal operating frequency range is from 1Hz to
400Hz.
Application features and functions
1. Power on : On initial power up there will be no output
current and this condition will be maintained until the Þrst
input cycle is run at the input terminals.
6. Dwell control is modiÞed under different operating
conditions.
- In slow speed mode dwell follows the duty cycle of the
input signal
- In normal run mode dwell is controlled at 16% of cycle
time plus coil rise time to current limit level.
- At high speed (determined by coil rise time) dwell is
75% of input cycle time.
7. Output current is normally 5.5 +/- 0.5 Amps. It can be
operated at higher or lower limits if required. (Not excluding
7.5 Amps).
8. Start Retard
On slow speed mode, a retard signal is generated that is
inversely proportional to input frequency. The retard is
nominally 4.8% at 1Hz, (related to input duty cycle) and can
be modiÞed to meet other application requirement.
9. High voltage on the output transistor is nominally
clamped at 350V but can be adjusted if necessary.
10. High Battery voltage operation
- At a battery voltage of 16V the dwell is modiÞed in run
speed to 10% of cycle time plus coil rise time.
- At a battery voltage of approximately 30V the module
will shutdown to prevent damages to the output devices.
2. Push start capability : The unit may be push started as
any input signal exceeding 200mV peak to peak will produce
a peak
3. Stall shutdown : If for a period of 5 seconds no input
signal is present, the unit will shutdown and output current
will be reduced at a rate slow enough to present a spark.
4. Automatic switching from a slow speed to run mode at
a preset frequency.
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. ªTypicalº parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including ªTypicalsº
must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
Motorola was negligent regarding the design or manufacture of the part. Motorola and
are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
Opportunity/Affirmative Action Employer.
MC33191
MOTOROLA
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