EUM6261A

EUM6261A is a motor driver for single coil brushless DC motor. With its high efficient direct PWM control mode, EUM6261A can control the speed of brushless DC motor. It is an interface between a HALL IC and a single coil motor. EUM6261A is suitable for variable speed control fan of personal computer's power supply radiation and CPU cooler.

The functions built in EUM6261A are PWM control mode, minimum speed mode, fan tachometer, lock protection, auto restart and Hall Bias.

PWM mode controls the internal upper side power device in low noise and low vibration. Minimum speed mode makes the lowest speed of motor settable. If the motor is stalled by external force or obstacles, overdrive current may incur coil overheat/burning. To prevent this, lock protection circuit can shut down the internal power devices for a few seconds after motor lockup. Then auto restart circuit will try to power up these devices. The protection and power up time are settable by external capacitor. EUM6261A has FG output, RD output and Hall bias output.