Reversible dc motor driver available in tiny SO8 package
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The ZXBM5210 from Diodes is designed to drive single coil reversible dc fans and motors in medium voltage, low power applications such as consumer, domestic appliance, industrial and office equipment.
The driver's integrated H-bridge output stage can deliver currents up to 700mA continuous, 1.2A peak and has been designed to meet stringent low noise requirements by minimising both audible switching noise and electromagnetic interference.
Its supply range of 3 to 18V means the device can support a variety of single phase 5, 9, 12 and 15V dc motors.
Typical operating current is low at 0.85mA, and to help improve motor driving power efficiency, the standby mode of the ZXBM5210 consumes a typical current of only 32µA.
The ZXBM5210 is available in a choice of SO8 and thermally enhanced SO8 exposed pad packages. It 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.
To prevent damage to either the motor coil or driver ic, the ZXMB5210 incorporates under voltage lockout, over voltage, over current and thermal shutdown protection functions.
