Datasheet
1/9
L9651
September 2013
■ Modified VDMOS Power Stage (U
DSBR
> 80V)
■ RDSON < 500 mOhm (T
j
= 25°C)
■ 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
■ Wide operating supply voltage from 4.7V up to
30V
■ DIAGNOSTIC FUNCTIONS
■ Open Load Detection (Output off, 100s-
filtering time)
■ Short to Ground Detection (Output off, 100s -
filtering time)
■ Short to Battery Detection (Output on)
■ Over temperature detection (Output on)
■ Storage of last fault in 8 Bit - Serial Register
■ Fault Signal Indication at Serial Data Out
without need to read out the Serial Interface
■ Daisy Chainable Serial Diagnostic
■ 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).
PowerSO-20
ORDERING NUMBER: L9651
SMART QUAD SWITCH
BLOCK DIAGRAM
Serial Diagnostic
Tur n On
V
BAT
Clock Sync.
Serial Data Out
Ground
Reset
●
Four Fold
Logic
Short Circuit
Protection
●
●
●
●
●
Fault Detection
References
Gate
Control
Output 1..4
Data In
Inputs 1..4
Underv. Shutd.