The A3903 is a low voltage bidirectional DCElectric motor driver, typical input voltages range from 3 to 5.5 V, and output currents up to 500 mA. The unique full-bridge output integrates source-side linear operation to ensure continuous voltage supply to the motor coil. The regulated output minimizes the × R of IDS (On)Changes in motor voltage due to changes and battery voltage tolerances.
Logic input pins control the direction of rotation, braking, and standby of the motor (Current sink driverOptional PWM. Internal protection circuitry features thermal shutdown, undervoltage lockout, and crossover current (breakdown) protection.
The A3903 is available in a 2 mm × 2 mm (nominal height 0.55 mm), 8-pin DFN package with an exposed thermal conduction spacer (package suffix EE). The small package is Pb-free and has 100% matte tin leadframe plating.
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- Robotic actuators and pumps
- Portable printers/scanners
- Camera lens/shutter control
- Battery electric toys and games
- Low noise test instrument system
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- Constant voltage operation (adjustable)
- 500 mA peak output current rating
- Low-power standby mode
- Small 2 mm × 2 mm (nominal height 0.55 mm) DFN packages
- Typical input voltage ranges from 3 to 5.5 V
- Adjustable constant voltage or PWM operation
- Standby mode current is less than 500 nA
- –40°C to 85°C operating temperature range