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L9823

April 2003

s

OUTPUTS CURRENT CAPABILITY UP TO

0.5A

s

CASCADABLE SPI CONTROL FOR

OUTPUTS

s

RESET FUNCTION WITH RESET SIGNAL OR

s

PROGRAMMABLE INTRINSIC OUTPUT

VOLTAGE CLAMPING AT TYP. 50V FOR

INDUCTIVE SWITCHING

s

OVERCURRENT SHUTDOWN WITH LATCH-

OFF FOR EVERY WRITE CYCLE (SFPD = LOW)

s

INDEPENDENT THERMAL SHUTDOWN OF

OUTPUTS (SOA PROTECTION)

s

OUTPUT STATUS DATA AVAILABLE ON THE

SPI USING 8-BIT I/O PROTOCOL UP TO 3.0MHZ

s

LOW STANDBY CURRENT WITH RESET =

LOW (TYP 35µA @ VDD)

s

OPEN LOAD DETECTION (OUTPUTS OFF)

s

s

HIGH EMS IMMUNITY AND LOW EME

(CONTROLLED OUTPUT SLOPES)

s

FULL FUNCTIONALITY OF THE REMAINING

DEVICE AT NEGATIVE VOLTAGE DROP ON

OUTPUTS (-1,5V OR -3,0A)

s

OUTPUT MODE PROGRAMMABLE FOR

SUSTAINED CURRENT LIMIT OR

SHUTDOWN

DESCRIPTION

L9823 is a Octal Low-Side Driver Circuit, dedicated

for automotive applications. Output voltage clamping

is provided for flyback current recirculation, when in-

ductive loads are driven. Chip Select and cascadable

Serial 8-bit Interface for outputs control and diagnos-

tic data transfer.

SO24 (20+2+2)

ORDERING NUMBER: L9823

Octal Low-Side Driver for bulb, resistive and inductive loads with

serial input control, output protection and diagnostic

BLOCK DIAGRAM

Diag1

Q1

CSB

SI

SCLK

SO

OUT0

OUT1

OUT2

OUT3

OUT4

OUT5

OUT6

OUT7

GND

Diag0

Diag7

Reset

Q0

CH0

OT0

Diag6

Q6

Q0

Q7

Diag2

Q2

CH3

CH4

CH5

CH1

Diag3

Q3

Diag4

Q4

Diag5

Q5

Q7

CH7

Diag7

Reset

Reset

Undervoltage

RESET

Q1

Q2

Q3

Q4

Q5

Q6

Diag1

Diag2

Diag3

Diag4

Diag5

Diag6

IOL

24

23

14

13

12

11

2

1

22

9

4

3

10

5 -8

17 - 20

Over

Temperature

Detect

+

-

+

-

=

=

+

-

Gate

Control

OL0

CH2

CH7

SFPD

15

VDG

Diag0

16

VDD

ISCB0