STEPPER MOTOR DRIVER
Description
UDN2916A
STEPPER MOTOR DRIVER
ADVANCE DATA
ABLE TO DRIVE BOTH WINDINGS OF BIPOLAR STEPPER MOTOR OUTPUT CURRENT UP TO 750mA EACH WINDING WIDE VOLTAGE RANGE 10V TO 50V HALF-STEP, FULL-STEP AND MICROSTEPPING MODE BUILT-IN PROTECTION DIODES INTERNAL PWM CURRENT CONTROL LOW OUTPUT SATURATION VOLTAGE DESIGNED FOR UNSTABILIZED MOTOR SUPPLY VOLTAGE INTERNAL THERMAL SHUTDOWN DESCRIPTION The UDN2916A is a bipolar monolithic integrated circuits intended to control and drive both winding of a bipolar stepper motor or bidirectionally control two DC motors.
The UDN2916A with a few external components form a complete control and drive circuit for LSTTL or microprocessor controlled stepper motor system.
The power stage is a dual full bridge capable of sustaining 50V and including four diodes for current recirculation.
BLOCK DIAGRAM
Powerdip 20+2+2 ORDERING NUMBER: UDN2916A
A cross conduction protection is provided to avoid simultaneous cross conduction during switching current direction.
An internal pulse-width-modulation (PWM) controls the output current to 750mA with peak startup current up to 1A.
Wide range of current control from 750mA (each bridge) is permitted by means of two logic inputs and an external voltage reference.
A phase input to each bridge determines the load current direction.
A thermal protection circuitry disables the outputs if the chip temperature exceeds safe operating limits.
November 1991
ThAdvanced information on a new product now in development or undergoing evaluation.
Details are subject to change without notice.
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UDN2916A
PIN CONNECTION (Top view)
PIN FUNCTIONS
N° 1;2 3;23 4;22 Name OUTPUT A SENSE RESISTOR COMPARATOR INPUT See pins 5;21 Connection to Lower Emitters of Output Stage for Insertion of Current Sense Resistor Input connected to the comparators.
The voltage across the sense resistor is feedback to this input throught the low pass filter RC CC.
The higher power transistors are disabled when the sense voltage exceeds the reference vo...
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