Site
Map • Contact
Us 中文 • English
Related Links:
Datasheets:
A3959: DMOS Full-Bridge PWM Motor Driver (PDF)
Selection Guides:
Power Integrated Circuits,
Power Motor Drivers,
Power Motor Drivers - Full-Bridge
FAQs:
A3959 DMOS Full-Bridge PWM Motor Driver
Design Support Tools:
A3959SB Product Evaluation Kit
- Home
- / Products
- / Part Numbers
- / A3959
- / Part Numbers
- / Products
A3959
DMOS Full-Bridge PWM Motor Driver
Features
- ±3 A, 50 V Output Rating
- Low rDS(on) Outputs (270 milliohms, Typical)
- Mixed, Fast, and Slow Current-Decay Modes
- Synchronous Rectification for Low Power Dissipation
- Internal UVLO and Thermal-Shutdown Circuitry
- Crossover-Current Protection
- Internal Oscillator for Digital PWM Timing
Description
Designed for pulse-width modulated (PWM) current control of dc motors, the A3959SB, A3959SLB, and A3959SLP are capable of output currents to ±3 A and operating voltages to 50 V. Internal fixed off-time PWM current-control timing circuitry can be adjusted via control inputs to operate in slow, fast, and mixed current-decay modes.
PHASE and ENABLE input terminals are provided for use in controlling the speed and direction of a dc motor with externally applied PWM-control signals. Internal synchronous rectification control circuitry is provided to reduce power dissipation during PWM operation.
Internal circuit protection includes thermal shutdown with hysteresis, undervoltage monitoring of supply and charge pump, and crossover-current protection. Special power-up sequencing is not required.
The A3959SB/SLB/SLP is a choice of three power packages, a 24-pin plastic DIP with a copper batwing tab (package suffix 'B'), a 24-lead plastic SOIC with a copper batwing tab (package suffix 'LB'), and a thin (<1.2 mm) 28-lead plastic TSSOP with an exposed thermal pad (suffix 'LP'). In all cases, the power tab is at ground potential and needs no electrical isolation. Each package is available in a leadfree version (100% matte tin leadframe).
Functional Block Diagram
| Part Number | Package Type | RoHS Compliant |
Part Composition/ RoHS Data |
Temperature | Comments | Samples | Distributor Stock |
|---|---|---|---|---|---|---|---|
| A3959SB-T | 24-pin DIP | Yes | view data | -20 °C to 85 °C |
Contact Local Sales Representative or check distributor stock |
||
| A3959SLBTR-T | 24-lead SOIC | Yes | view data | -20 °C to 85 °C |
Contact Local Sales Representative or check distributor stock |
||
| A3959SLPTR-T | 28-lead TSSOP | Yes | view data | -20 °C to 85 °C |
Contact Local Sales Representative or check distributor stock |
||
| APEK3959SB-01 | DEMO BOARD | No | -- | -20 °C to 85 °C | Demo board not available |
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.