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L9308
DUAL LOW SIDE DRIVER
.DARLI .I .I .SHORTCI .I .SI
NGTON OUTPUT STAGE NPUT COMPARATOR WITH WIDE RANGE COMMON MODE OPERATION AND GROUND COMPATIBLE INPUTS NPUT COMPARATOR HYSTERESIS RCUIT PROTECTION OF OUTPUT WITH SOA PROTECTION NTERNAL THERMAL PROTECTION WITH HYSTERESIS NGLESUPPLYVOLTAGEFROM 3.5VUP TO 28V
MINIDIP ORDERING NUMBER : L9308
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. BLOCK DIAGRAM
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.
October 1990
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
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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 IZS VS IO Tj, Tstg Ptot Current Into Supply Clamp Zener Diode Supply Voltage Output Current Junction and Storage Temperature Power Dissipation at Tamb = 85C Parameter Tamb = 25C, DC Pulsed (*) Value 30 80 28 Internally Limited - 55 to +150 650 C mW Unit mA mA V(**)
(*) 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 Max Value 100 Unit C/W R th j-amb Thermal Resistance Junction-ambient
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ELECTRICAL CHARACTERISTICS (Vs = 14.4V ; - 40C Tamb, 85C; RS = 100 unless otherwise noted)
Symbol VIH IB IOS CMR ISC Parameter Hysteresis of the Input Comparater Input Bias Current Input Offset Current Input Common Mode Range Output Short Circuit Current for Each Channel (see fig. 4) Test Conditions VIN = 200mVpp ; f = 1kHz V I = VI = 0 VI = VI = 0 Vs = 6 - 18V Tamb = 25C VIN - VIN > 70mV VS = 16V Tamb = 25C to 85C Tamb = - 40C to 25C VOUT 1, 2 = 6V Tamb = - 40C to 25C - + VI - VI > 70mV IOUT 1, 2 = 300mA Tamb = 25C to 85C VI - VI > 70mV VS = 18V VS = 5V 3.5 VI
+ - - + - + -
Min. 20
Typ.
Max. 80
Unit mV A nA V
0.2 50 0
1.0 400 VST -1.6
0.6 0.7 1.2 1.5 1.0 1.4
A A A V V
VCSAT
On Status Saturation Voltage
IOL
Output Leakage Current
10
300 20 18 8 27
A A V mA mA V mA
VST I
"st.by"
Supply voltage (pin 6) Supply Current Supply Current Voltage Clamp Supply Protection Minimum Output Current wiyth the Outputs connected Together Rise Time (see fig. 2) Fall Time Delay Time on Delay Time off VI > 70mV
-
5 18 20 400
I"ON" VZS IOmin tr tf tdon tdoff
VI- VI+ > 70mV IZS = 10mA VCSAT = 1.5V IOUT = 50mA Tamb = 25C IOUT = 50mA Tamb = 25C
2 2 10 10
s s
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Figure 1 : Switching Time Test Circuit. Figure 2 : Switching Time Waveforms for Resistive Loads.
Figure 3 : Typical Application and Test Circuit.
Notes :
a) RS requiredonly to limit ZS whenever VS exceeds VZS voltage value. b) C1, C2 cut high frequency gain during current limiting.
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Figure 4 : Typical SOA Characteristic.
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MINIDIP PACKAGE MECHANICAL DATA
DIM. MIN. A a1 B b b1 D E e e3 e4 F I L Z 3.18 7.95 2.54 7.62 7.62 6.6 5.08 3.81 1.52 0.125 0.51 1.15 0.356 0.204 1.65 0.55 0.304 10.92 9.75 0.313 0.100 0.300 0.300 0.260 0.200 0.150 0.060 mm TYP. 3.32 0.020 0.045 0.014 0.008 0.065 0.022 0.012 0.430 0.384 MAX. MIN. inch TYP. 0.131 MAX.
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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. (c) 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.
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