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Allegro A3959 DMOS Full-Bridge PWM Motor Driver Datasheet
The Allegro A3959 is a DMOS full-bridge PWM motor driver designed for pulse-width modulated current control of DC motors. It supports output currents up to +3 A and operating voltages up to 50 V. The device features internal fixed off-time PWM current-control timing circuitry that can be adjusted to operate in slow, fast, and mixed current-decay modes. It includes internal synchronous rectification control to reduce power dissipation and offers protection features such as thermal shutdown with hysteresis, undervoltage monitoring, and crossover-current protection. The component is available in three power packages: 24-pin plastic DIP, 24-lead plastic SOIC, and 28-lead plastic TSSOP.
Read onlineAllegro A3959 specifications
| Output Current | +3 A |
|---|---|
| Operating Voltage | 50 V |
| Output On Resistance | 270 mΩ |
| Operating Temperature Range | -20°C to +85°C |
| Junction Temperature | +150°C |
| Internal Oscillator Frequency | 4.25 MHz |
Source: Allegro A3959 DMOS Full-Bridge PWM Motor Driver Datasheet
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Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What are the current decay modes supported?
The device supports slow, fast, and mixed current-decay modes.
From: Allegro A3959 DMOS Full-Bridge PWM Motor Driver Datasheet
What is the typical internal oscillator frequency?
The typical internal oscillator frequency is 4.25 MHz.
From: Allegro A3959 DMOS Full-Bridge PWM Motor Driver Datasheet
What is the maximum output current of the A3959 driver?
The device can source or sink up to ±3 A of continuous current.
From: Allegro A3959 DMOS Full-Bridge PWM Motor Driver Handbook
Which supply voltage range does the A3959 support?
It operates with a supply voltage (VBB) up to 50 V.
From: Allegro A3959 DMOS Full-Bridge PWM Motor Driver Handbook