ATA6830

www.DataSheet4U.com Features 2-Phase 1 A Stepping Motor Driver Compensated Half Step Operation Chopper Current Control Unidirectional Single Wire Bus Interface with Error Feedback Intelligent Travel Operation Control Referencing by Extending or Retracting Application Dynamic Headlamp Adjustment Benefits Error Recognition with Feedback Short Circuit Protected Outputs Overtemperature Warning and Shut Off Supply Voltage Supervision Intelligent Stepper Motor Driver ATA6830 Electrostatic sensitive device. Observe precautions for handling. Description The circuit serves to control a stepping motor for dynamic headlamp beam adjustment in automobiles. Two chopper-controlled H-bridges serve as the stepping motor driver. The circuit receives the commands to control the stepping motor by means of a unidirectional serial single-wire bus. An integrated process control independently moves the stepping motor into the new desired position. This allows it to be automatically accelerated and slowed down. The stepping motor is operated in compensated half-step operation. The maximum clock frequency at which the stepping motor is operated depends on the supply voltage, the chip temperature, the operating mode, and position difference. Rev. 4575C–BCD–05/03 1 Figure 1. Block Diagram AGND RSET COS Temperature Monitor Supply Monitor VDD Oscillator Biasing Voltage Regulator VSS BUS UART VBAT1A Command Interpreter VBAT1B SM1A Cruising Service Control SM1B Driver L...