Product category: Power Supply ICs and Controllers
News Release from: Allegro MicroSystems Europe | Subject: A3901
Edited by the Electronicstalk Editorial Team on 20 June 2006
Motor driver saves portable power
The new A3901 is a dual full-bridge motor driver IC designed for low-voltage portable applications involving bipolar stepper or brush DC motors.
The new A3901 from Allegro MicroSystems Europe is a dual full-bridge motor driver IC designed for low-voltage portable applications involving bipolar stepper or brush DC motors MOSFET output stages are used to substantially reduce the voltage drop and the power dissipation of the outputs of the A3901 compared with typical drivers using bipolar transistors
This article was originally published on Electronicstalk on 30 Aug 2000 at 8.00am (UK)
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The outputs have been optimised for low voltage drop, with currents up to +/-400mA (+/-800mA with outputs paralleled) and an operating voltage range of 2.5 to 5.5V.
Power-off current in "sleep" mode is only 50nA.
The four inputs can control one bipolar stepper motor in full- or half-step mode, or one or two DC motors in forward, reverse or brake mode.
Output current can be regulated by pulsewidth modulating the inputs at frequencies of up to 250kHz.
The full-bridge outputs can be paralleled for higher-current applications.
Internal protection circuitry includes thermal shutdown and crossover (shoot-through) protection.
The A3901 is supplied in a 3 x 3 x 0.75mm nominal, 10-lead MLP/DFN package, with exposed thermal pad (package EJ).
This small footprint package is lead (Pb) free, with 100% matt tin leadframe plating.
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