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L9651

SMART QUAD SWITCH

s

s

s

s

s

s

s

Modified VDMOS Power Stage (U

DSBR

> 80V)

RDSON < 500 mOhm (T

j

= 25擄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

PowerSO-20

ORDERING NUMBER: L9651

DIAGNOSTIC FUNCTIONS

s

Open Load Detection (Output off, 100碌s-

filtering time)

s

Short to Ground Detection (Output off, 100碌s -

filtering time)

s

Short to Battery Detection (Output on)

s

s

s

s

Serial Interface Clock Frequency up to 500kHz

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

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).

s

BLOCK DIAGRAM

V

BAT

Turn On

q

Data In

Clock

Sync.

Underv. Shutd.

Serial Data Out

q

q

q

Reset

References

Serial Diagnostic

Fault Detection

q

Inputs 1..4

Logic

Gate

Control

Four Fold

q

Short Circuit

Protection

Ground

April 2001

Output 1..4

1/9

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