PBL3717A_93 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

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PBL3717A_93

STEPPER MOTOR DRIVER

STMicroelectronics 

. FULL STEP - HALF STEP - QUARTER STEP

OPERATING MODE

. BIPOLAR OUTPUT CURRENT UP TO 1 A

. FROM 10 V UP TO 46 V MOTOR SUPPLY

VOLTAGE

. LOW SATURATION VOLTAGE WITH INTE-

GRATED BOOTSTRAP

. BUILT IN FAST PROTECTION DIODES

. EXTERNALLY SELECTABLE CURRENT

LEVEL

. OUTPUT CURRENT LEVEL DIGITALLY OR

ANALOGUE CONTROLLED

. THERMAL PROTECTION WITH SOFT INTER-

VENTION

PBL3717A

STEPPER MOTOR DRIVER

Powerdip 12 + 2 + 2

(Plastic Package)

ORDER CODE : PBL3717A

DES CRI P TI O N

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 compara-

tors. When both of these inputs are high the device

is disabled. A separate logic input controls the direc-

tion of current flow.

A monostable, programmed by an external RC net-

work, sets the current decay time.

The power section is a full H-bridge driver with four

internal clamp diodes for 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 Pow-

erdip package.

PIN CONNECTION (top view)

April 1993

1/11

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