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BUS IC
DC/DC CONVERTER
MOTOR DRIVER IC
RIPPLE COUNTER
y Position control Position control + driver Speed control Ripple detection
DRIVER IC
I/O IC
SENSOR IC
SENSOR INTERFACE IC
y Sensorless position control of DC-motors
FEATURES y y y y y y y y y y y y y y Supply voltage range VDD 9V to 16V Full motor control and diagnosis Driving a four N-channel-power-MOSFET full bridge Pulse width modulation with 8bit resolution for high side drivers Drive frequency 23 kHz Reduced current peaks during motor start and acceleration Active motor braking Motor position determined by sensing motor current fluctuations Shortcircuit and overvoltage protected outputs One pin microprocessor interface with automatic baud rate recognition Motor turned off automatically 200 ms after the last valid transmission Low standby current (typ. < 200 A) - 40C to + 125C operating temperature SO20w package DESCRIPTION The IC enables a C to track the position of a DC-motor by counting its current ripples. The ripple signal is available on an output pin to connect controllers or dedicated logic. With the bidirectional interface the actual position can be read out and IC parameters can be changed. Main parameters are motor direction and PWM to control high side drivers. The IC can be adapted to different motor characteristics by changing the RC-filter on ODIF, IDIF, OLP and the voltage divider on BRTH. APPLICATION y y y Seat adjustment Steering column adjustment Fuel pump PINNING Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Name GND VGH1 VGH2 VGL1 VGL2 VDD BSI SENSE1 SENSE2 RSR OLP IDIF ODIF VSA RB VREF BRTH TEMP IMP OUT DATA I/O Description Ground Gate voltage for high side driver 1 Gate voltage for high side driver 2 Gate voltage for low side driver 1 Gate voltage for low side driver 2 Input supply voltage Input bootstrap voltage Voltage sense bridge 1 Voltage sense bridge 2 External resistor to adjust slew rate Output low pass filter Inverting input differential amplifier Output differential amplifier Internal 9V analog supply External bias resistor Internal 5V supply voltage Input breake threshold Input temperature monitor Incremental output for counting pulses, open drain Serial data I/O
GND VGH1 VGH2 VGL1 VGL2 VDD BSI SENSE1 SENSE2 RSR 1 2 3 4 5 6 7 8 9 10
E910.40
PACKAGE
20 19 18 17 16 15 14 13 12 11
DATA I/O IMP OUT TEMP BRTH VREF RB VSA ODIF IDIF OLP
BLOCK DIAGRAM
VBAT VCC VDD RB
BIAS VDD Reg
VGH 1 VGH 2
VSA
AVDD
slewrate controlled
BSI
VREF
VREF Control
C
TEMP
FET Driver
RSR
M
DATA
Short Circuit Detect
VGL 1 VGL 2 SENSE 1 SENSE 2
IMPOUT
Incr. Detect
BRTH
S/H
ODIF
Filter & Amplifier
Note ELMOS Semiconductor AG (below ELMOS) reserves the right to make changes to the product contained in this publication without notice. ELMOS assumes no responsibility for the use of any circuits described herein, conveys no licence under any patent or other right, and makes no representation that the circuits are free of patent infringement. While the information in this publication has been checked, no responsibility, however, is assumed for inaccuracies. ELMOS does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of a life-support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications. Copyright (c) 2005 ELMOS Reproduction, in part or whole, without the prior written consent of ELMOS, is prohibited. www.elmos.de | sales@elmos.de
VREF
IDIF
OLP
46
elmos product catalog june 2005
47

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