Datasheet > EUM6261

EUM6261

更新时间： 2024-10-28 12:49:55

品牌	Logo	应用领域
德信 - EUTECH		驱动器风扇电机
页数	文件大小	规格书
1页	103K
描述
1A /18V PWM Fan Motor Driver

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EUM6261 数据手册

EUM6261/6261A

1A /18V PWM Fan Motor Driver

DESCRIPTION

FEATURES

EUM6261/6261A is a fan motor driver for the single

coil brushless DC motor. With its high efficient direct

PWM control mode, EUM6261/6261A controls the

speed of brushless DC motor with a built in HALL IC

interface. EUM6261/6261A is suitable to drive

variable speed motors for personal computer’s power

supply radiation fans and CPU coolers.

Built in 18V Full-wave Fan Driver

PWM Fan Speed Control

Programmable Minimum Fan Speed

Internal 10% Minimum Fan Speed Clamp

Built in Soft Switching Function

Built in Hall Bias

Lock Protection and Auto Restart

Fan Rotation Speed Feedback FG Output

Fan Rotation Detection RD Output

Thermal Shutdown Protection

EUM6261/6261A 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. EUM6261/6261A can set

minimum fan speed by presetting RMIN voltage.

EUM6261/6261A 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,

EUM6261/6261A 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.

Available in TSSOP-16 Package

RoHS Compliant and 100% Lead (Pb)-Free

APPLICATIONS

Personal Computer’s Power Supply Radiation

Fans and CPU Coolers

Application Circuit

Figure 1. Typical Application Circuit

DS6261/6261A Ver1.1 Oct. 2008

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