L9651 STMicroelectronics

L9651 SMART QUAD SWITCH Modified VDMOS Power Stage (U > 80V) DSBR RDSON < 500 mOhm (T = 25C) j CMOS Compatible Inputs Enable Input (Reset) Outputs Capable of up to 2.2 Amperes Outputs Internally Clamped at 70V for Fast Inductive Load Switch Off PowerSO-20 Wide operating supply voltage from 4.7V up to 30V ORDERING NUMBER: L9651 DIAGNOSTIC FUNCTIONS Open Load Detection (Output off, 100s- filtering time) Short to Ground Detection (Output off, 100 s - Serial Interface Clock Frequency up to 500kHz filtering time) Short to Battery Detection (Output on) DESCRIPTION Over temperature detection (Output on) Storage of last fault in 8 Bit - Serial Register The L9651 consists of four identical low side power switches. A serial diagnostic interface indicates fail- Fault Signal Indication at Serial Data Out ure mode of each switch (short circuit to V or BAT without need to read out the Serial Interface ground and open load or over temperature). Daisy Chainable Serial Diagnostic BLOCK DIAGRAM V Data In Clock Sync. BAT Turn On Underv. Shutd. References Serial Diagnostic Fault Detection Gate Logic Control Short Circuit Four Fold Protection Ground September 2013 1/9 Inputs 1..4 Reset Output 1..4 Serial Data Out L9651 PIN CONNECTION (Top view) GND 1 20 GND N.C. 2 19 N.C. IN1 3 18 IN4 IN2 4 17 IN3 OUT1 5 16 OUT4 VBAT 6 15 R OUT2 7 14 OUT3 DO 8 13 DI CL 9 12 SY GND 10 11 GND SO20POW PIN FUNCTION N Pin Function 1, 10, GND Ground 11, 20 2, 19 N.C. Not Connected 3 IN1 Input 1 4 IN2 Input 2 5 OUT1 Output 1 6 VBAT Supply Voltage 7 OUT2 Output 2 8 DO Serial Data Out 9 CL Clock 12 SY Synchronization 13 DI Serial Data In 14 OUT3 Output 3 15 R Reset 16 OUT4 Output 4 17 IN3 Input 3 18 IN4 Input 4 2/9