Datasheet

1

2005-07-20

2-Phase Stepper-Motor Driver

Bipolar IC

TLE 4727

Overview

Features

• 2

× 0.7 amp. outputs

• Integrated driver, control logic and current control

(chopper)

• Fast free-wheeling diodes

• Max. supply voltage 45 V

• Outputs free of crossover current

• Offset-phase turn-ON of output stages

• All outputs short-circuit proof

• 5 V output for logic supply

• Error-flag for overload, open load, overtemperature

P-DIP-20-6

Description

The TLE 4727 is a bipolar, monolithic IC for driving bipolar stepper motors, DC motors

and other inductive loads that operate on constant current. The control logic and power

output stages for two bipolar windings are integrated on a single chip which permits

switched current control of motors with 0.7 A per phase at operating voltages up to 16 V.

The direction and value of current are programmable for each phase via separate control

inputs. A common oscillator generates the timing for the current control and turn-on with

phase offset of the two output stages. The two output stages in a full-bridge configuration

include fast integrated free-wheeling diodes and are free of crossover current. The

device can be driven directly by a microprocessor in several modes by programming

phase direction and current control of each bridge independently.

A stabilized 5 V output allows the supply of external components up to 5 mA. With the

error output the TLE 4727 signals malfunction of the device. Setting the control inputs

high resets the error flag and by reactivating the bridges one by one the location of the

error can be found.

Type

Ordering Code

Package

TLE 4727

on request

P-DIP-20-6