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Preliminary Data Sheet

2

International

Rectifier

IRVR101

Introduction

The IRVR101 is designed for use in a 12V automotive charging system where optimized battery charging and

dynamic alternator control are desired.

The Block Diagram illustrates the main components and potential

system configuration of the LIN controlled charging system.

The regulator is shown separate from the

alternator assembly but it is typically integrated into the machine. The interface between the Engine Control

Unit (ECU) and the regulator requires one bi-directional line with a transceiver at each end for serial

communication.

Alternatively, communication may be achieved between the regulator and Body Control

Module (BCM) as illustrated in below.

The signals to the regulator (received from the ECU or BCM) include the voltage setpoint, load response control

ramp, load response control ramp cut-off speed, and the field excitation limit. The voltage setpoint command

also allows for disabling of the field driver to achieve a momentary no output condition.

Signals from the

regulator (transmitted to the ECU or BCM) include the field excitation duty cycle, the field excitation current OR

temperature (customer defined), and the fault status. Transmitted fault codes provide unique indication for

mechanical, electrical, temperature, communication, and timeout errors.

Block Diagram

Sensor data inputs *:

ECT =Engine Coolant Temp;

AT = A mbient Te mpe rature;

VSS = Vehicle Speed Sensor

Instrument

Panel

Warning

indicator

Additional

LIN nodes

(up to 15)

LIN Controlled

Voltage Regulator

Alternator

12V Battery

LIN Transceiver

Battery

Voltage

Sense

Body Control

Module (BCM)

LIN

Transceiver

Power

Input

Stator

Rotor

B+

GND

P hase

detection

Low side

field driver

+

-

B+

Voltage

Sense

Lamp

control

Engine Electronic

Control Unit

CAN

Transceiver

CAN

Transceiver

VSS

AT

ECT

Sensor data inputs *

Vehicle

electrical

loads

Additional

CAN nodes

Optional communication path

LIN

Transceiver

Optional sense line

Sensor data inputs *:

ECT =Engine Coolant Temp;

AT = A mbient Te mpe rature;

VSS = Vehicle Speed Sensor

Instrument

Panel

Warning

indicator

Instrument

Panel

Warning

indicator

Additional

LIN nodes

(up to 15)

LIN Controlled

Voltage Regulator

Alternator

12V Battery

LIN Transceiver

Battery

Voltage

Sense

Body Control

Module (BCM)

LIN

Transceiver

Power

Input

Stator

Rotor

B+

GND

P hase

detection

Low side

field driver

+

-

B+

Voltage

Sense

Lamp

control

Engine Electronic

Control Unit

CAN

Transceiver

CAN

Transceiver

VSS

AT

ECT

Sensor data inputs *

Vehicle

electrical

loads

Additional

CAN nodes

Optional communication path

LIN

Transceiver

Optional sense line