PBL3717A Programmable IC Chips STEPPER MOTOR DRIVER pcb driver circuit board

PBL3717A STEPPER MOTOR DRIVER pcb driver circuit board

►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

DESCRIPTION The PBL3717Ais a monolithicIC which controlsand drives one phase of a bipolar stepper motor with choppercontrolof the phasecurrent. Current levels maybeselected in threestepsbymeansoftwo logic inputs which select one of three current comparators. When both of these inputs are high the device isdisabled. A separatelogic inputcontrolsthe 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 theloweremitters isavailable 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.

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