Product Summary

The PBL3717A is amonolithic IC which controlsand 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 comparators. When both of these inputs are high the device is disabled.A separate logic input controls the direction of current flow. 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 PBL3717A and few external components form a complete stepper motor drive sub system. The PBL3717A is supplied in a 12 + 2 + 2 lead Powerdip package.

Parametrics

PBL3717A absolute maximum ratings: (1)Vs Power Supply Voltage: 50 V; (2)Vss Logic Supply Voltage: 7 V; (3)Vi Logic Input Voltage: 6 V; (4)Vc Comparator Input Vss; (5)Vr Reference Input Voltage: 15 V; (6)Io Output Current (DC operation): 1.2 A; (7)Tstg Storage Temperature: – 55 to + 150℃; (8)Tj Operating Junction Temperature: 150℃.

Features

PBL3717A features: (1)Full step - Half step - Quarter step operating mode Bipolaroutput current up to 1 A from 10 V up to 46 V motor supply voltage ; (2)Low saturation voltage with inte grated bootstrap; (3)Built in fast protection diodes; (4)Externally selectable current level ; (5)Output current level digitally or analogue controlled; (6)Thermal protection with soft intervention.

Diagrams

PBL3717A PIN CONNECTION

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PBL3717A
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