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L9825TR

Octal Low-side Driver For Resistive and Inductive Loads With Serial / Parallel Input Control, Output Protection and Diagnostic

STMicroelectronics 

L9825

Octal Low-side Driver For Resistive and Inductive Loads With

Serial / Parallel Input Control, Output Protection and Diagnostic

■ OUTPUTS CURRENT CAPABILITY UP TO

1A, RON ≤ 0,75Ω AT TJ = 25°C

■ PARALLEL CONTROL INPUTS FOR

OUTPUTS 1 AND 2

■ SPI CONTROL FOR OUTPUTS 1 TO 8

■ RESET FUNCTION WITH RESET SIGNAL AT

NRES PIN OR UNDERVOLTAGE AT VCC

■ INTRINSIC OUTPUT VOLTAGE CLAMPING

AT TYP. 50V

■ OVERCURRENT SHUTDOWN AT OUTPUTS

1 TO 6

■ SHORT CIRCUIT CURRENT LIMITATION

AND SELECTIVE THERMAL SHUTDOWN AT

OUTPUTS 7 AND 8

■ OUTPUT STATUS DATA AVAILABLE ON THE

SPI

PowerSO20

ORDERING NUMBER: L9825

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.

BLOCK DIAGRAM

VCC

NON1

VCC

13

2

Q1

S Latch / Driver

R

OUT1

IOL

Diag1

NON2

NCS

VCC

Q2

Diag2

VCC

CLK

VCC

SDI

SDO

VCC

Fault Latch

Q1

Q2

Q3

Q3

Q4

Q5

Q6

Q7

Q8

Diag1 Diag3

Diag2

Diag3 Q4

Diag4 Diag4

Diag5 Q5

Diag6

Diag7

Diag5

Diag8 Q6

Diag6

S

Latch / Driver

R

nRES

VCC

Q7

Reset

VCC

Reset

Undervoltage

RESET

Diag7

Q8

Diag8

GND

S Latch / Driver

Current Control

R

Overtemperature Detection

+

-

VDG

CH1

CH2

OUT2

OUT3

IOL

+

- VDG CH3

CH4

CH5

CH6

OUT4

OUT5

OUT6

OUT7

IOL

+

- VDG CH7

CH8

OUT8

September 2013

1/11

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