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UNISONIC TECHNOLOGIES CO., LTD 93334
HIGH ENERGY IGNITION CIRCUIT
DESCRIPTION
This device is designed to use the signal from a reluctor type ignition pickup to produce a well controlled output from a power darlington output transistor.
LINEAR INTEGRATED CIRCUIT
SOP-8
FEATURES
* Very Low Peripheral Component Count * No Critical System Resistors * Wide Supply Voltage Operating Range (4.0V ~ 24V) * Overvoltage Shutdown (30V) * Dwell Automatically Adjusts to Produce Optimum Stored Energy without Waste * Externally Adjustable Peak Current * Transient Protected Inputs and Outputs
*Pb-free plating product number: 93334L
ORDERING INFORMATION
Order Number Normal Lead Free Plating 93334-S08-R 93334L-S08-R 93334-S08-T 93334L-S08-T Package SOP-8 SOP-8 Packing Tape Reel Tube
93334L-S08-R (1)Packing Type (2)Package Type (3)Lead Plating (1) R: Tape Reel, T: Tube (2) S08: SOP-8 (3) L: Lead Free Plating, Blank: Pb/Sn
www.unisonic.com.tw Copyright (c) 2005 Unisonic Technologies Co., Ltd
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93334
PIN CONFIGURATION
LINEAR INTEGRATED CIRCUIT
POWER GND
1
8
IL
SENS GND
2 UTC 93334
7
OUT
C
3
6
VCC
S1
4
5
S2
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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93334
BLOCK DIAGRAM AND TYPICAL APPLICATION
Figure 1
CFilter 0.2 R1 20k Reluctor Pickup 1.35H C1* 470 C2* 0.01 R 12k R2 20k
LINEAR INTEGRATED CIRCUIT
RBAT 300 RDRIVE 100 Power Output &OVP RGAIN 5.0k
Ignition Coil Primary 8.0mH
S2 5 S1 4 + -
Input Comparator with Hysteresis
**BU941
C 3 CDWELL 0.1
+ -
Dwell Reference Buffer
Current Limit Sense
UTC 93334
2 1
RD2 100
RD1 35-350
RS 0.075
* Optional parts for extended transient protection ** A350V zener clamp is required when using the standard BU941 This clamp is not required if a selected version with VCEO(SUS)
Component Values Pickup Coil RL RA, RB C1, C2 RBAT CFilter CDWELL RGAIN RD2 RS RDRIVE RD1
Power Ground
550V is used
Series resistance = 80010% @ 25 , inductance= 1.35H @ 1.0kHz @ 15Vrms Leakage L=0.6mH, primary R=0.435% @ 25 , primary L=7.5mH ~ 8.5mH @ 5.0A Load resistor for pickup=1020% Input buffer resistors provide additional transient protection to the already clamped inputs=20k20% For reduction of high frequency noise and spark transients induced in pick-up and leads; optional and non-critical Provides load dump protection (but small enough to allow operation at VBAT =4.0V) =30020% Transient filter on VCC, non-critical Stores reference, circuit designed for 0.1F20% RGAIN/RD1 sets the DC gain of the current regulator =5.0k20% RD2/RD1 set up voltage feedback from RS Sense resistor (PDAG in thick film techniques) =0.07530% Low enough to supply drive to the output Darlington, high enough to keep VCE(SAT) of the IC below Darlington turn-on during load dump = 10020%, 5.0W Starting with 35 assures less than 5.5A, increasing as required to set 5.5A RD1=(IO(PEAK) RS - VREF)/((VREF/RD2)-(1.4/RGAIN))- 100)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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ABSOLUTE MAXIMUM RATINGS
PARAMETER
LINEAR INTEGRATED CIRCUIT
RATING UNIT 24 Power Supply Voltage-Steady State Transient 300ms or less VCC V 90 300 mA Output Sink Current-Steady State Transient 300ms of less IOUT(SINK) 1.0 A Power Dissipation 1.05 W PD Derate above 25C 12 mW/C Junction Temperature TJ +125 C Operating Temperature TOPR -20~+85 C Storage Temperature TSTG -40 ~ 150 C Note 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. 2. The device is guaranteed to meet performance specification within 0 ~+70 operating temperature range and assured by design from -20 ~+85 .
SYMBOL
ELECTRICAL CHARACTERISTICS (VCC = 13.2VDC, circuit of Figure 3, unless otherwise specified)
PARAMETER SYMBOL TEST CONDITIONS VBAT =4.0VDC VBAT =8.0VDC VCC VBAT =12.0VDC VBAT =14.0VDC Ignition Coil Current Peak, Cranking RPM 2.0Hz ~ 27Hz IPEAK VBAT =4.0VDC VBAT =6.0VDC VBAT =8.0VDC VBAT =10.0VDC F=33Hz F=133Hz F=200Hz F=267Hz F=333Hz F=33Hz F=133Hz F=200Hz F=267Hz F=333Hz Turn-on Turn-off 75 Turn-on Turn-off 1.8 1.5 60 VBAT =10VDC VCE(SAT) VBAT =30VDC VBAT =50VDC VREF 4.0 120 280 540 160 120 3.0 4.0 4.6 5.1 5.1 5.1 4.2 3.4 2.7 MIN TYP 3.5 7.2 10.4 11.8 3.4 5.2 5.3 5.4 5.5 5.5 5.4 4.4 3.4 7.5 5.0 4.0 3.0 2.3 30 360 90 MAX UNIT
Internal Supply Voltage, Pin 6
VDC
APEAK
Ignition Coil Current Peak, Normal RPM
IPEAK
APEAK
Ignition Coil On-Time, Normal RPM Range
TON
Shutdown Voltage Input Threshold (Static Test) Input Threshold Hysteresis Input Threshold (Active Operation) Total Circuit Lag from ts (Figure 1) until Ignition Coil Current Falls to 10% Ignition Coil Current Fall Time (90% ~ 10%) Saturation Voltage IC Output (Pin 7) (RDRIVE = 100) Current Limit Reference, Pin 8
VBAT VTHR VHYS VTHR
25
14.0 5.9 4.6 3.6 2.8 35
ms
VDC mVDC mVDC VDC s s mVDC
120
190
mVDC
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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6.0 5.5 5.0
LINEAR INTEGRATED CIRCUIT
LGNITION COIL CURRENT VERSUS FREQUENCY / PERIOD
VBAT =13.2VDC Slope= VBAT -1.5V 8.0mH
IOUT (A)
4.0 3.0 2.0 1.0 333 200 5 133 100 10 70 15 50 20 25 33 30 ms
Frequency, f (Hz)
UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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