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L9474

March 2005

1

Features

2

Description

The L9474 is a monolithic multifunction generator

Voltage regulator intended for use in automotive ap-

plications.

This device regulates the output of an automotive

generator by controlling the field winding current by

means of a variable frequency PWM high side driver.

The setpoint voltage reference is selected by the EN-

GINE CONTROL UNIT via RVC protocol.

ALL SILICON VOLTAGE REGULATOR

Figure 2. Schematic Diagram

FIELD

(ROTOR)

STARTER

BATTERY

STATOR

ASVR

LOADS

RECTIFIER

BRIDGE

F+

P

FILTER

C

82nF

G

TO ECM

L

TO ECM

TO BCM

D02AT508

Figure 1. Package

Table 1. Order Codes

Part Number

Package

L9474

Multiwatt8

Multiwatt8

Rev. 1