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Datasheets:
A3936: DMOS Three-Phase PWM Motor Driver (PDF)
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Power Motor Drivers - Brushless DC
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Closed-Loop Speed Control for A3932/36 (PDF)
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A3936: New Three-Phase Motor Controller with Integrated 3 A, 50 V DMOS Drivers
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A3936
DMOS Three-Phase PWM Motor Driver
DISCONTINUED PRODUCT: These parts are no longer in production The device should not be purchased for new design applications. Samples are no longer available.
Date of status change: May 3, 2010.
For existing customer transition, and for new customers or new applications, refer to your Allegro sales representative.
Features
- ±3 A, 50 V continuous output rating
- Low rDS(on) outputs (typically 500 mΩ source, 315 mΩ sink)
- Configurable mixed-, fast- and slow-current-decay modes
- Synchronous rectification for low power dissipation
- Internal UVLO and thermal shutdown circuitry
- Crossover-current protection
- Tachometer output for external speed control loop
Description
Designed for pulse-width-modulated (PWM) current control of three-phase brushless DC motors, the A3936 is capable of peak output currents to ±3 A and operating voltages to 50 V. Internal fixed off-time PWM current-control timing circuitry can be configured to operate in slow-, fast- and mixed-decay modes.
Internal synchronous rectification control circuitry is provided to improve power dissipation during PWM operation.
hysteresis, and crossover current protection. Special power-up sequencing is not required.
The A3936 is supplied in a 44-pin plastic PLCC with internally fused leads (three on each side) for enhanced heat dissipation. These leads are at ground potential and need no electrical isolation. This device is lead (Pb) free version, with 100% matte tin leadframe plating.
Functional Block Diagram
| Part Number | Package Type | RoHS Compliant |
Part Composition/ RoHS Data |
Temperature | Comments | Samples | Distributor Stock |
|---|---|---|---|---|---|---|---|
| A3936SEDTR-T | 44-lead PLCC | Yes | view data | -20 °C to 85 °C | discontinued May 3, 2010 discontinued |
Contact Local Sales Representative or check distributor stock |
Allegro's products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system.