Designed for pulse-width modulation (PWM) motor control, the A3948 integrates on-chip DMOS output transistors in an H-bridge configuration. Consequently, the motor driver chip can handle continuous currents of ±1.5 A and operating voltages up to 50 V. The R_DS(ON) for the output DMOS transistors is 270 mΩ (typical). The internal PWM current-control circuitry is configured via a three-wire serial interface. Also, the serial port programs the driver for fast, slow, and mixed-current decay modes. To minimize power consumption when not in use, the IC offers a sleep mode. The unit's internal circuit protection includes thermal shutdown with hysteresis, crossover-current protection, and undervoltage lockout circuitry. Based on the supplier's third-generation ABCD3 process, the A3948 comes in two power packages. The A3948SB is housed in a 24-pin plastic DIP, and the A3948SLB is available in a 24-lead plastic SOIC. Both come with a copper batwing tab for improved power dissipation. The A3948 costs $1.96 in lots of 5000.

Allegro MicroSystems
www.allegromicro.com; (508) 853-5000

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Reader Comments Hello Sir, I am in search of LED driver IC which van drive 6 LEDs parallaly. LEDs will be normal 12V, 30mA LEDs. Can you suggest us the ICs. IC should meet MIL grade temperature range and the project is for Aircraft application. Regards, Gayatri gayatri -September 10, 2008 hi..............i m in search of an motor driver IC 1d293 found a lot but didnt get it, mail if you have. thanking in anticipation shoaib -January 14, 2008 hi........ i need a chip inbuilt individual PWM led current control driver if anybdy know please tell me regards, Prasath rao prasath -November 16, 2007
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