L9474 Datasheet, PDF (1/8 Pages) STMicroelectronics – ALL SILICON VOLTAGE REGULATOR

L9474
ALL SILICON VOLTAGE REGULATOR
1 Features
■ High side field driver
■ Thermal protection
■ Field driver short circuit protection
■ RVC interface
■ Overvoltage protection
■ Complex diagnostics
■ Load Response Control
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.
Figure 2. Schematic Diagram
Figure 1. Package
Multiwatt8
Table 1. Order Codes
Part Number
L9474
Package
Multiwatt8
The setpoint voltage reference is selected by the EN-
GINE CONTROL UNIT via RVC protocol.
L
TO ECM
TO ECM
F_M
F+
FIELD
(ROTOR)
ASVR
G
V_GO
P
FILTER
C
82nF
STARTER
TO BCM
BATTERY
STATOR
LOADS
RECTIFIER
BRIDGE
D02AT508
March 2005
Rev. 1
1/8