A3964, A3964ALB, A3964B Selling Leads, Datasheet
MFG:ALLEGRO Package Cooled:SOP D/C:06+
A3964, A3964ALB, A3964B Datasheet download
Part Number: A3964
MFG: ALLEGRO
Package Cooled: SOP
D/C: 06+
A3964, A3964ALB, A3964B
- Table of contents:
Info of A3964
Info of A3964ALB
Info of A3964B
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About A3964-0000T
PDF/DataSheet Download
Datasheet: A3964-0000T
File Size: 38107 KB
Manufacturer: 3M
Download : Click here to Download
About A390
PDF/DataSheet Download
Datasheet: A390
File Size: 440324 KB
Manufacturer: POWEREX [Powerex Power Semiconductors]
Download : Click here to Download
About A390
PDF/DataSheet Download
Datasheet: A390
File Size: 440324 KB
Manufacturer: POWEREX [Powerex Power Semiconductors]
Download : Click here to Download
A3964 General Description
Designed for pulse-width modulated (PWM) current control of bipolar stepper motors, the A3964SB and A3964SLB are capable of continuous output currents to ±800 mA and operating voltages to 30 V. Internal fixed off-time PWM current-control circuitry can be used to regulate the maximum load current to a desired value. An internal precision voltage reference is provided to improve motor peak-current control accuracy. The peak load current limit is set by the user's selection of an external resistor divider and current-sensing resistors. The fixed off-time pulse duration is set by user-selected external RC timing networks. The capacitor in the RC timing network also determines a user-selectable blanking window that prevents false triggering of the PWM current control circuitry during switching transitions. This eliminates the need for two external RC filter networks on the current-sensing comparator inputs.
For each bridge the PHASE input controls load current polarity by selecting the appropriate source and sink driver pair. For each bridge the ENABLE input, when held high, disables the output drivers. Special power-up sequencing is not required. Internal circuit protection includes thermal shutdown with hysteresis, transient-suppression diodes, and crossover-current protection.
A3964 Maximum Ratings
- ±800 mA Continuous Output Current Rating
- 30 V Output Voltage Rating
- Internal PWM Current Control, Saturated Sink Drivers
- Internally Generated, Precision 2.5 V Reference
- Internal Transient-Suppression Diodes
- Internal Thermal-Shutdown Circuitry
- Crossover-Current Protection, UVLO Protection
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