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L9825

July 2001

This is preliminary information on a new product now in development. Details are subject to change without notice.

s

OUTPUTS CURRENT CAPABILITY UP TO

s

PARALLEL CONTROL INPUTS FOR

OUTPUTS 1 AND 2

s

SPI CONTROL FOR OUTPUTS 1 TO 8

s

RESET FUNCTION WITH RESET SIGNAL AT

s

INTRINSIC OUTPUT VOLTAGE CLAMPING

AT TYP. 50V

s

OVERCURRENT SHUTDOWN AT OUTPUTS

1 TO 6

s

SHORT CIRCUIT CURRENT LIMITATION

AND SELECTIVE THERMAL SHUTDOWN AT

OUTPUTS 7 AND 8

s

OUTPUT STATUS DATA AVAILABLE ON THE

SPI

DESCRIPTION

L9825 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 Serial Pe-

ripheral Interface for outputs control and diagnostic

data transfer. Parallel Control inputs for two outputs.

PowerSO20

ORDERING NUMBER: L9825

PRODUCT PREVIEW

Octal Low-side Driver For Resistive and Inductive Loads With

Serial / Parallel Input Control, Output Protection and Diagnostic

BLOCK DIAGRAM

NCS

SDI

CLK

SDO

NON1

OUT1

OUT2

OUT3

OUT4

OUT5

OUT6

OUT7

OUT8

GND

Diag1

Diag8

nRES

Q1

CH1

Diag1

+

-

CH7

Diag7

Q7

Q1

Q8

CH3

Diag3

Q3

+

-

CH4

CH5

CH6

CH2

NON2

Diag2

Diag4

Q4

Diag5

Q5

Diag6

Q6

Q8

CH8

Diag8

Fault Latch

Q2

Reset

R

S

Latch / Driver

Reset

Undervoltage

RESET

+

-

Current Control

Overtemperature Detection

3

1

2

S

R

Latch / Driver

S

R

Latch / Driver

Q2

Q3

Q4

Q5

Q6

Q7

Diag2

Diag3

Diag4

Diag5

Diag6

Diag7

VCC

VCC

VCC

VCC

VCC

VCC

VCC

VCC

VDG

IOL

IOL

VDG

IOL

VDG