PBL3717A - STMicroelectronics

PBL3717A STEPPER MOTOR DRIVER

The PBL3717Ais a monolithic IC which controls and drives one phase of a bipolar stepper motor with chopper control of the phase current. Current levels may be selected in threesteps by means of two logic inputs which select one of three current comparators. When both of these inputs are high the device is disabled. A separate logic input controls the directi.

Features

r current recirculation. An externalconnectionto the lower emitters is available for the insertion of a sensing resistor. Two PBL3717As and few external components form a complete stepper motor drive subsystem. The raccomended operating ambient temperature ranges is from 0 to 70 °C. The PBL3717Ais supplied in a 12 + 2 + 2 lead Powerdip package. April 1993 PIN CONNECTION (top view) 1/11 PBL3717A PIN FUNCTIONS N° 1 2 Name UTPUT B PULSE TIME Function Output Connection (with pin 15). The output stage is a ”H” bridge formed by four transistors and four diodes suitable for switching applications..