DC motor driver overcomes space constraint challenges

18th December 2013

Staff Reporter

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Datasheet

A single-chip IC for driving single-coil reversible DC fans and motors has been introduced by Diodes. Designated the ZXBM5210, the IC reduces component counts and circuit footprints in medium and low power applications, and is available in a choice of SO8 and thermally enhanced SO8 exposed pad packages.

The H-bridge output stage, integrated in the driver, delivers currents as high as 700mA continuous, 1.2A peak, and has been designed to meet stringent low noise requirements by minimizing both audible switching noise and electromagnetic interference. The driver's supply range of 3V to 18V means the device will support a wide variety of single phase 5V, 9V, 12V and 15V DC motors.

Operating current is typically low at 0.85mA, and with the standby typical current being only 32µA, motor driving power efficiency is improved. The ZXBM5210 has four modes of operation: forward, reverse, brake and standby, selected via the device’s FWD and REV input pins. Motor speed is regulated by modifying the duty ratio of PWM signals applied to the two inputs or by adjusting the DC input voltage to the VREF input pin. The PWM oscillator is integrated within the device and no external timing capacitor is required.

The incorporated under voltage lockout, over voltage, over current and thermal shutdown protection functions help prevent damage to either the motor coil or driver IC. Reliability and robustness is further enhanced by the devices’ high ESD withstand capability of 6kV and wide operating temperature range of -40 to +105ºC.

Available for $0.33 (USD) each in SO8 packaging and $0.35 (USD) each in SO8-EP packaging, the ZXBM5210 reversible DC motor driver is offered in 1,000 piece quantities.