ATA6830 ATMEL Corporation, ATA6830 Datasheet

Manufacturer Part Number

ATA6830

Description

Intelligent Stepper Motor Driver

Manufacturer

ATMEL Corporation

Datasheet

1.ATA6830.pdf (23 pages)

Features

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Application

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Benefits

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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 unidi-

rectional 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.

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

Dynamic Headlamp Adjustment

Error Recognition with Feedback

Short Circuit Protected Outputs

Overtemperature Warning and Shut Off

Supply Voltage Supervision

Intelligent

Stepper Motor

Driver

ATA6830

Rev. 4575C–BCD–05/03