PBL3717A Datasheet, PDF (1/11 Pages) STMicroelectronics – STEPPER MOTOR DRIVER

. 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
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