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L9903

MOTOR BRIDGE CONTROLLER

STMicroelectronics 

L9903

MOTOR BRIDGE CONTROLLER

1 FEATURES

■ OPERATING SUPPLY VOLTAGE 8V TO 20V,

OVERVOLTAGE MAX. 40V

■ OPERATING SUPPLY VOLTAGE 6V WITH

IMPLEMENTED STEPUP CONVERTER

■ QUIESCENT CURRENT IN STANDBY MODE

LESS THAN 50µA

■ ISO 9141 COMPATIBLE INTERFACE

■ CHARGE PUMP FOR DRIVING A POWER

MOS AS REVERSE BATTERY PROTECTION

■ PWM OPERATION FREQUENCY UP TO

30KHZ

■ PROGRAMMABLE CROSS CONDUCTION

PROTECTION TIME

■ OVERVOLTAGE, UNDERVOLTAGE, SHORT

CIRCUIT AND THERMAL PROTECTION

■ REAL TIME DIAGNOSTIC

Figure 2. Block Diagram

Figure 1. Package

SO20

Table 1. Order Codes

Part Number

L9903

L9903TR

Package

SO20

Tape & Reel

2 DESCRIPTION

Control circuit for power MOS bridge driver in auto-

motive applications with ISO 9141bus interface.

VS 10

ST 1

-

+

= VSTH

Reference

BIAS

fST

VCC

Charge

pump

VCC

Overvolt age

RDG

DG 2

Undervoltage

Thermal shutdown

EN 4

REN

V S1TH =

DIR 5

RDIR

VCC

R PWM

PWM 3

PR 6

Timer

V S2TH =

RCP

11 CP

13 CB1

12 GH1

14 S1

RS1

19 GL1

RGL1

18 GL2

RGL2

17 S2

RS2

15 GH2

16 CB2

RX 7

R RX

VCC

R TX

TX 8

ISO-I nt erface

= 0.5 • VVS

I KH

9K

20 GND

October 2005

REV. 4

1/17

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