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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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