pbl3717as STMicroelectronics, pbl3717as Datasheet

pbl3717as

Manufacturer Part Number

pbl3717as

Description

Stepper Motor Driver

Manufacturer

STMicroelectronics

Datasheet

1.PBL3717AS.pdf (11 pages)

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DESCRIPTION

The PBL3717A is 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 three steps 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

external connection to 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 PBL3717A is supplied in a 12 + 2 + 2 lead Pow-

erdip package.

July 2003

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

LEVEL

OUTPUT CURRENT LEVEL DIGITALLY OR

ANALOGUE CONTROLLED

THERMAL PROTECTION WITH SOFT INTER-

VENTION

SELECTABLE

CURRENT

PIN CONNECTION (top view)

STEPPER MOTOR DRIVER

ORDER CODE : PBL3717A

Powerdip 12 + 2 + 2

(Plastic Package)

PBL3717A

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