L9651 Datasheet, PDF (1/9 Pages) STMicroelectronics – SMART QUAD SWITCH

L9651
SMART QUAD SWITCH
s Modified VDMOS Power Stage (U_DSBR > 80V)
s RDSON < 500 mOhm (T_j = 25°C)
s CMOS Compatible Inputs
s Enable Input (Reset)
s Outputs Capable of up to 2.2 Amperes
s Outputs Internally Clamped at 70V for Fast
Inductive Load Switch Off
s Wide operating supply voltage from 4.7V up to
30V
DIAGNOSTIC FUNCTIONS
s Open Load Detection (Output off, 100µs-
filtering time)
s Short to Ground Detection (Output off, 100µs -
filtering time)
s Short to Battery Detection (Output on)
s Over temperature detection (Output on)
s Storage of last fault in 8 Bit - Serial Register
s Fault Signal Indication at Serial Data Out
without need to read out the Serial Interface
s Daisy Chainable Serial Diagnostic
BLOCK DIAGRAM
PowerSO-20
ORDERING NUMBER: L9651
s Serial Interface Clock Frequency up to 500kHz
DESCRIPTION
The L9651 consists of four identical low side power
switches. A serial diagnostic interface indicates fail-
ure mode of each switch (short circuit to V_BAT or
ground and open load or over temperature).
Turn On
V_BAT
Data In
Underv. Shutd.
q
Clock
Sync.
References
Serial Diagnostic
Logic
Four Fold
Gate
Control
Fault Detection
q
q
q
q
Short Circuit
q
Protection
Ground
April 2001
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