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PBL3717A

STMicroelectronics
Part Number PBL3717A
Manufacturer STMicroelectronics
Description STEPPER MOTOR DRIVER
Published Mar 22, 2005
Detailed Description PBL3717A STEPPER MOTOR DRIVER . . . . . . . . FULL STEP - HALF STEP - QUARTER STEP OPERATING MODE BIPOLAR OUTPUT CURRE...
Datasheet PDF File PBL3717A PDF File

PBL3717A
PBL3717A

Overview
PBL3717A STEPPER MOTOR DRIVER .
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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 INTEGRATED BOOTSTRAP BUILT IN FAST PROTECTION DIODES EXTERNALLY SELECTABLE CURRENT LEVEL OUTPUT CURRENT LEVEL DIGITALLY OR ANALOGUE CONTROLLED THERMAL PROTECTION WITH SOFT INTERVENTION Powerdip 12 + 2 + 2 (Plastic Package) ORDER CODE : PBL3717A DESCRIPTION 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 direction of current flow.
A monostable, programmed by an external RC network, 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 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.
A parallel RC network connected to this pin sets the OFF time of the lower power transistors.
The pulse generator is a monostable triggered by the rising edge of the output of the comparators (toff = 0.
69 RT CT).
Supply Voltage Input for Half Output Stage See also pin 14.
Ground Connection.
With pins 5, 12 and 13 also conducts heat from die to printed circuit copper.
See pin 4.
Supply Voltage Inp...


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