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L9904

October 2002

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

s

OPERATING SUPPLY VOLTAGE 8V TO 28V,

OVERVOLTAGE MAX. 40V

s

OPERATING SUPPLY VOLTAGE 6V WITH

IMPLEMENTED STEPUP CONVERTER

s

QUIESCENT CURRENT IN STANDBY MODE

LESS THAN 50µA

s

ISO 9141 COMPATIBLE INTERFACE

s

CHARGE PUMP FOR DRIVING A POWER

MOS AS REVERSE BATTERY PROTECTION

s

PWM OPERATION FREQUENCY UP TO

30KHZ

s

PROGRAMMABLE CROSS CONDUCTION

PROTECTION TIME

s

OVERVOLTAGE, UNDERVOLTAGE, SHORT

CIRCUIT AND THERMAL PROTECTION

s

REAL TIME DIAGNOSTIC

DESCRIPTION

Control circuit for power MOS bridge driver in auto-

motive applications with ISO 9141bus interface.

SO20

ORDERING NUMBER: L9904

PRODUCT PREVIEW

MOTOR BRIDGE CONTROLLER

BLOCK DIAGRAM

VS

DIR

PWM

EN

RX

TX

CP

CB1

GH1

S1

GL1

CB2

GH2

S2

GL2

K

=

PR

VCC

=

=

ISO-Interface

VCC

GND

ST

Ref erence

BIAS

Charge

pump

Overvoltage

Undervoltage

PWM

R

DI R

R

RX

R

TX

R

0.5

• V

VS

RS2

RGL2

RGL1

RS1

RCP

REN

VCC

Timer

I KH

V S2TH

Thermal shutdown

V S1TH

DG

VCC

RDG

VSTH

fST

=

-

+

10

1

2

4

5

3

6

7

8

20

9

16

15

17

18

19

14

12

13

11