93334-S08-R

93334 UTC | Alldatasheet

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UNISONIC TECHNOLOGIES CO., LTD

93334 LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw 1 of 5 Copyright © 2005 Unisonic Technologies Co., Ltd QW-R121-006,A HIGH ENERGY IGNITION CIRCUIT „ DESCRIPTION This device is designed to use t he signal from a reluctor type ignition pickup to produce a well controlled output from a power darlington output transistor. „ 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 SOP-8 *Pb-free plating product number: 93334L „ ORDERING INFORMATION Order Number Normal Lead Free Plating Package Packing 93334-S08-R 93334L-S08-R SOP-8 Tape Reel 93334-S08-T 93334L-S08-T SOP-8 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

UNISONIC TECHNOLOGIES CO., LTD 2 of 5 www.unisonic.com.tw QW-R121-006,A „ PIN CONFIGURATION OUT C VCC IL SENS GND 3 6 POWER GND 5S1 UTC 93334

UNISONIC TECHNOLOGIES CO., LTD 3 of 5 www.unisonic.com.tw QW-R121-006,A „ BLOCK DIAGRAM AND TYPICAL APPLICATION Figure 1 * 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) 550V is used Dwell Reference Buffer Input Comparator Power Output &OVP Ignition Coil Primary 8.0mH Power Ground C S with Hysteresis CFilter 0.2 RBAT 300 RDRIVE 100 RGAIN 5.0k BU941 Current Limit Sense RD2 100 RD1 35-350 RS 0.075 CDWELL 0.1 C2* 0.01 C1* 470 R 12k 20k 20k UTC 93334 Reluctor Pickup 1.35H Component Values Pickup Series resistance = 800Ω±10% @ 25¥, inductance= 1.35H @ 1.0kHz @ 15Vrms RL Load resistor for pickup=10 Ω±20% RA, RB Input buffer resistors provide additional tr ansient protection to the already clamped inputs=20k±20% C1, C2 For reduction of high frequency noise and s park transients induced in pick-up and leads; optional and non-critical RBAT Provides load dump protection (but small enough to allow operation at VBAT =4.0V) =300Ω±20% CFilter Transient filter on V CC, non-critical CDWELL Stores reference, circuit designed for 0.1µF±20% RGAIN R GAIN/RD1 sets the DC gain of the current regulator =5.0k±20% RD2 R D2/RD1 set up voltage feedback from RS RS Sense resistor (P DAG in thick film techniques) =0.075Ω±30% RDRIVE Low enough to supply drive to the output Darlington, high enough to keep V CE(SAT) of the I C below Darlington turn-on during load dump = 100Ω±20%, 5.0W RD1 Starting with 35Ω assures less than 5.5A, increasing as required to set 5.5A RD1=(IO(PEAK) RS – VREF)/((VREF/RD2)-(1.4/RGAIN))- ≈100Ω)

UNISONIC TECHNOLOGIES CO., LTD 4 of 5 www.unisonic.com.tw QW-R121-006,A „ ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATING UNIT

24 Power Supply Voltage-Steady State Transient 300ms or less V CC 90 V

300 mA Output Sink Current-Steady State Transient 300ms of less I OUT(SINK) 1.0 A

1.05 W Power Dissipation

Derate above 25°C PD 12 mW/ °C Junction Temperature T J +125 °C Operating Temperature T OPR -20~+85 °C Storage Temperature T STG -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 0Ċ~+70 Ċ operating temperature range and assured by design from -20Ċ~+85Ċ. „ ELECTRICAL CHARACTERISTICS (VCC = 13.2VDC, circuit of Figure 3, unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT VBAT =4.0VDC 3.5 VBAT =8.0VDC 7.2 VBAT =12.0VDC 10.4 Internal Supply Voltage, Pin 6 V CC VBAT =14.0VDC 11.8 VDC VBAT =4.0VDC 3.0 3.4 VBAT =6.0VDC 4.0 5.2 VBAT =8.0VDC 4.6 5.3 Ignition Coil Current Peak, Cranking RPM 2.0Hz ~ 27Hz IPEAK VBAT =10.0VDC 5.1 5.4 APEAK F=33Hz 5.1 5.5 F=133Hz 5.1 5.5 F=200Hz 4.2 5.4 F=267Hz 3.4 4.4 Ignition Coil Current Peak, Normal RPM I PEAK F=333Hz 2.7 3.4 APEAK F=33Hz 7.5 14.0 F=133Hz 5.0 5.9 F=200Hz 4.0 4.6 F=267Hz 3.0 3.6 Ignition Coil On-Time, Normal RPM Range T ON F=333Hz 2.3 2.8 ms Shutdown Voltage V BAT 25 30 35 V DC Turn-on 360 Input Threshold (Static Test) V THR Turn-off 90 mVDC Input Threshold Hysteresis V HYS 75 mV DC Turn-on 1.8 Input Threshold (Active Operation) V THR Turn-off 1.5 VDC Total Circuit Lag from ts (Figure 1) until Ignition Coil Current Falls to 10% 60 120 µs Ignition Coil Current Fall Time (90% ~ 10%) 4.0 µs VBAT =10VDC 120 VBAT =30VDC 280 Saturation Voltage IC Output (Pin 7) (RDRIVE = 100Ω) VCE(SAT) VBAT =50VDC 540 mVDC Current Limit Reference, Pin 8 V REF 120 160 190 mV DC

UNISONIC TECHNOLOGIES CO., LTD 5 of 5 www.unisonic.com.tw QW-R121-006,A „ LGNITION COIL CURRENT VERSUS FREQUENCY / PERIOD 6.0 5.5 5.0 4.0 3.0 2.0 1.0 333 IOUT (A) 200 133 100 70 15 20 30 ms Frequency, f (Hz) VBAT =13.2VDC 8.0mH VBAT -1.5VSlope= 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.