1A /18V PWM Fan Motor Driver

1A /18V PWM Fan Motor Driver EUM6261 EUM6261A is a fan Motor Driver for the single coil brushless DC motor. With its high efficient direct PWM control mode, EUM6261 EUM6261A controls the speed of brushless DC motor with a built in HALL IC Interface EUM6261 EUM6261A is suitable to drive variable speed motors for personal computer’s power supply radiation fans and CPU coolers. EUM6261 EUM6261A integrates PWM fan speed control, minimum speed mode, fan tachometer, lock protection, auto restart and Hall Bias functions. PWM mode controls fan speed in low noise and low vibration ways by adjusting RCTL voltage. EUM6261 EUM6261A CAN set minimum fan speed by presetting RMIN voltage. EUM6261 EUM6261A internally limits to the 10% lowest fan speed. If a fan motor is stalled by the external force or obstacles, overdrive current may incur coil overheat and burning. To prevent motor from overheating, the lock protection circuit shuts down the internal power devices for a few seconds after the motor lock is detected. Then the auto restart circuit resumes to power up the internal power devices. If the lock persists, EUM6261 EUM6261A shuts off power devices for a few seconds. The lock protection delay time is externally programmable by a capacitor. EUM6261 6261A has built in motor rotation speed feedback (FG) output, motor rotation detection (RD) output and Hall Sensor bias output. By Eutech Microelectronics Inc
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EUM6261A




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EUM6261 Application circuits
EUM6261 circuits
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