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MOTOROLA
SEMICONDUCTOR
TECHNICAL DATA
MC33191
12V IGNITION DRIVER
SILICON MONOLITHIC INTEGRATED CIRCUIT
Prototype Information
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 eld 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. Designed for Automotive Ignition Application Continuous System Voltage up to 28.6V Continuous Operating Ambient Temperature Range from -30C to +125C Frequency Range from 1Hz to 400 Hz Coil Current Regulation Hall Effect and Reluctance Sensor Applications.
Vcc in+ inIsr C stall VLS C25/75 Cad
DW SUFFIX
PLASTIC PACKAGE CASE 751G SO-16L
PIN ASSIGNMENT
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
Gnd OODOO. OOCOO Output H.V.C. I.S. M.B Vreg
ORDERING INFORMATION
Device MC33191P Temperature Range -30C to +125C Package DIL16
Simplied Block Diagram
1 Vreg 9 10(MB) 15
Series Reg. Input
Vcc
Band Gap 1.5KW
12
2 3
+
14
13
20mA 80mA
Current sense LOGIC 11
Vreg
Vreg Vreg
6.7mA 26.8mA
25/75 Retard
6 mA
8 mA
Slow Speed
5 4
Stall
3.2mA
Adapt dwell
31.8mA to 80mA
1.92mA
7
6
8
GND 16
This document contiains information on a new product under development. Motorola reserves the right to change or discontinue this product without notice.
O Motorola,Inc
Date : 10/12/98 Rev : 1.0
MC33191
DEVICE PIN OUT IDENTIFICATION
Pin 1 2 3 4 5 6 7 8 Function Vcc Input + Input Start Retard I Trim Stall Capacitor V Low Speed 25/75 Capacitor Adaptive Dwell Cap. Pin 9 10 11 12 13 14 15 16 Function V reg Master Bias Current Sense High Voltage Clamp Output OO C OO OO D OO Master bias
ELECTRICAL REQUIREMENTS The IC performs to the limits of the table between temperature range of - 30C to +125C and it operates between the temperature range of - 40C to +150C
Symbol ICC Vreg ICCH Vin (+) P Vin (+) N Vin (-) P Vin (-) N Vin TH Vin Hys. RM Vin Hys. SS I75 I75 / I25 I75 / I ADU I ADU / IADD I ADU / IADR VEDR I 75 / ISU I SD / I SU VHVC VCS VOS IOLK VOSD VSSS
Description I.C.Drain Current Regulator output voltage I.C. Drain Current High Voltage (+) Input, Positive Clamp (+) Input, Negative Clamp (-) Input, Positive Clamp (-) Input, Negative Clamp Input Threshold Run Mode Hysteresis Slow Speed Hysteresis 25/75 Current Up I75 / I25 Current ratio I75 / IADU Current ratio IADU / IADD Current ratio I ADU / I ADR Current ratio Reduced Excess Dwell Trip Voltage I 75 / I SU Current Ratio I SD/ I SU Current ratio Collector Clamp Voltage Current Sense Voltage Output Saturation Voltage Output Leakage Current Overvoltage Shutdown Voltage Slow Speed Stall
Min 3 6,5
Max 5 7,1 10
Unit mA V mA V V V V mA mV mV mA
7 1 7 1 -25 280 54 6.2 0.317 0.794 1.49 2.35 15.5 1.05 3.9 14.4 133
8 2 8 2 +25 372 88 7.68 0.365 0.878 1.7 2.66 19 1.27 4.95 16.7 185 985 25
V
V mV mV mA V V
27 2.4
30 3.1
MC33191
MOTOROLA
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MC33191
Figure 1. Test Schematic
Vbat 300W 1 Vcc 5.1KW 2 In+ 5.1KW 3 In4 Isr 5 Cs 6 Vls 7 C25/75 8 Cod OOCOO 14 OUT 13 Clamp 12 500W IS 11 MB 10 Vreg 9 26KW 57KW OODOO 15 33W 6.8V GND 16 68W Vbat
Figure 2. Application Circuit (Reluctance Sensor Input)
+ -
Ign 0.1
200
1/2W
Battery 68
2.5W
1
Vcc
Ground
16
6.8V 5.0W
Ignition Coil
+Sensor Reluctance -Sensor 0.1 5.0k 0.1 5.0k
2
IN+
D
15
33 1/4W
3
IN-
C
14
5k
4
Retard
Output
13
200
Q1
5
1.0
Stall
Clamp
12
400
6
16k
Slow Speed 25/75
Current Sense Bias
11
.05 200/400
7
0.1
10
400 Gnd 57k
8
0.1 10k
Adaptive Dwell
Vref
9
NOTE : 1. Q1 = BUZ111 or Eqivalent 2. T = Trim Resistors
MC33191
MOTOROLA
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MC33191
Figure 3. Application Circuit (Hall Sensor Input)
85 Hall Voltage 0.1 1.1k 18V Hall Output 100 200 1/2W 68 2.5W Ign + -
Battery
1
Engine Microcontroller 4.7k
Vcc
Ground
16
0.1 2 IN+ D 15 33
1/4W
6.8V 5.0W
Ignition Coil
0.1
10k
3
IN-
C
14
4
5.0k
Retard
Output
13
200
Q1
5k
5
1.0 3.0k 16k
Stall
Clamp
12
400
6
Slow Speed 25/75
Current Sense Bias
11
T .05 T
285
5.1k 0.1
7
10
400 57k
T Gnd
8
0.1 10k
Adaptive Dwell
Vref
9
NOTE : 1. Q1 = BUZ111 or Eqivalent 2. T = Trim Resistors
MC33191
MOTOROLA
4
MC33191
FUNCTIONNAL DESCRIPTION
Application /System Performances
1. Reluctance sensor input. - Minimum input level of 200mV peak to peak - Maximum input level of 40V peak to peak 2. Hall sensor input - Open collector output desirable. - Input level of 0.5V to Vbat 3. Operating voltage range - Normal range from 9V to 16V. -Operational range with some parameters from 6V to 24V.
- No separate start wire into module is required - Switch occurs at approximatly 12Hz but can be changed within a narrow region 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 6. Dwell control is modied 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 modied 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 modied 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.
modications
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 : -30C to 125C 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 rst input cycle is run at the input terminals. 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. Typical 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 Typicals 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
5

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