L9308 DUAL LOW SIDE DRIVER .. .. . . DARLINGTON OUTPUT STAGE INPUT COMPARATOR WITH WIDE RANGE COMMON MODE OPERATION AND GROUND COMPATIBLE INPUTS INPUT COMPARATOR HYSTERESIS SHORT CIRCUIT PROTECTION OF OUTPUT WITH SOA PROTECTION INTERNAL THERMAL PROTECTION WITH HYSTERESIS SINGLESUPPLYVOLTAGEFROM 3.5VUP TO 28V DESCRIPTION The L9308 is a monolithic interface circuit with differentialinput comparator and open collector output able to sink current specifically to drive lamps, relays, d.c. motors, electro valves etc. Particular care has been taken to protect the device against destructive failures - short circuit of outputs to VS, SOA protection, supply overvoltage. MINIDIP ORDERING NUMBER : L9308 A built in thermal shut-down switches off the device when the IC’s internal dissipation becomes too high and the chip temperature exceeds the security threshold. The input comparatorhysteresis increases the interface’s noise immunity allowing the correct use in critical environments as automotive applications. BLOCK DIAGRAM October 1990 This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice. 1/7 L9308 PIN CONNECTION (Top view) 1) 2) 3) 4) 5) 6) 7) 8) -IN2 +IN2 OUT2 GND OUT1 VST +IN1 -IN1 Inverting input2 Non-inverting input2 Output2 Ground Output1 Supply Non-inverting input1 Inverting input1 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit 30 80 mA mA Supply Voltage 28 V(**) Output Current Internally Limited IZS Current Into Supply Clamp Zener Diode VS IO Tamb = 25°C, DC Pulsed (*) Tj, Tstg Junction and Storage Temperature – 55 to +150 °C Ptot Power Dissipation at Tamb = 85°C 650 mW (*) TON ≤ 2.5ms ; repetition time > 30ms. (**) The maximum allowed supply voltage without limiting resistor is limited by the built-in protection zener diode : see VZS spec. values. If VS is higher than VZS a resistor R S is necessary to limit the zener current IZS. THERMAL DATA Symbol Parameter R th j-amb Thermal Resistance Junction-ambient 2/7 Max Value Unit 100 °C/W L9308 ELECTRICAL CHARACTERISTICS (Vs = 14.4V ; – 40°C ≤ Tamb, ≤ 85°C; RS = 100Ω unless otherwise noted) Symbol VIH IB IOS CMR ISC VCSAT IOL I Parameter Test Conditions Hysteresis of the Input Comparater VIN = 200mVpp ; f = 1kHz Input Bias Current V I = VI = 0 Typ. 20 Max. Unit 80 mV + – 0.2 1.0 µA + – ± 50 ± 400 nA VST –1.6 V 0.6 0.7 1.2 A A A 1.5 V 1.0 1.4 V 10 300 20 µA µA Input Offset Current VI = VI = 0 Input Common Mode Range Vs = 6 – 18V Tamb = 25°C Output Short Circuit Current for Each Channel (see fig. 4) VIN – VIN > 70mV VS = 16V Tamb = 25°C to 85°C Tamb = – 40°C to 25°C VOUT 1, 2 = 6V On Status Saturation Voltage Tamb = – 40°C to 25°C – + VI – VI > 70mV IOUT 1, 2 = 300mA Tamb = 25°C to 85°C Output Leakage Current Min. – 0 – VI – VI > 70mV VS = 18V VS = 5V VST Supply voltage (pin 6) ”st.by” Supply Current VI VI > 70mV 5 I”ON” Supply Current VI– VI+ > 70mV 18 VZS Voltage Clamp Supply Protection IZS = 10mA 20 IOmin Minimum Output Current wiyth the Outputs connected Together VCSAT = 1.5V 400 Rise Time (see fig. 2) Fall Time IOUT = 50mA Tamb = 25°C 2 2 µs Delay Time on Delay Time off IOUT = 50mA Tamb = 25°C 10 10 µs tr tf tdon tdoff 3.5 + – 18 V 8 mA mA 27 V mA 3/7 L9308 Figure 1 : Switching Time Test Circuit. Figure 3 : Typical Application and Test Circuit. Notes : 4/7 a) RS requiredonly to limit ΙZS whenever VS exceeds VZS voltage value. b) C1, C2 cut high frequency gain during current limiting. Figure 2 : Switching Time Waveforms for Resistive Loads. L9308 Figure 4 : Typical SOA Characteristic. 5/7 L9308 MINIDIP PACKAGE MECHANICAL DATA mm DIM. MIN. A TYP. MAX. MIN. 3.32 TYP. MAX. 0.131 a1 0.51 0.020 B 1.15 1.65 0.045 0.065 b 0.356 0.55 0.014 0.022 b1 0.204 0.304 0.008 0.012 D E 10.92 7.95 9.75 0.430 0.313 0.384 e 2.54 0.100 e3 7.62 0.300 e4 7.62 0.300 F 6.6 0.260 I 5.08 0.200 L Z 6/7 inch 3.18 3.81 1.52 0.125 0.150 0.060 L9308 Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. 1994 SGS-THOMSON Microelectronics - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singapore Spain - Sweden - Switzerland - Taiwan - Thaliand - United Kingdom - U.S.A. 7/7