AH287 Просмотр технического описания (PDF) - Diodes Incorporated.

Номер в каталоге

Компоненты Описание

производитель

AH287

HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER

Diodes Incorporated. 

Features

AH287

HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR

CONTROLLER

General Description

• On Chip Hall Sensor

• Rotor-Locked Shutdown

• Automatically Restart

• Built-in Zener Protection for Output Driver

• Operating Voltage: 3.8V~28V

• Output Current: IO(AVE) = 400mA

• Lead Free Packages: SIP-4L and SOT89-5L (Note 1)

• SIP-4L and SOT89-5L: Available in “Green” Molding

Compound (No Br, Sb)

• Lead Free Finish/ RoHS Compliant (Note 2)

AH287 is a monolithic fan motor controller with Hall sensor’s

capability. It contains two complementary open-drain drivers for

motor’s coil driving, automatic lock shutdown and restart function

relatively.

Rotor-lock shutdown detection circuit turns off the output driver

when the rotor is blocked to avoid coil overheat. Then, the

automatic recovery circuit will restart the motor. These protected

actions are repeated and periodic during the blocked period. Until

the blocking is removed, the motor recovers and runs normally.

Typical Application Circuit

24V

D2

287

D1

12 34

GND

D3

C1

DO

DOB

L2

L1

48V

48V

Note: The optional Capacitor C1 and Diode D3 are for power stabilization. C1 is recommended to be E-Cap., luF/25V;

D3 is recommended to be Zener Diode, VZ =27V. Which C1and D3 value need to be fine tuned to optimize

design for different coils and power suppliers.

24V Brush-Less DC Fan

AH287 Rev. 10

DS31042

1 of 11

www.diodes.com

APRIL 2010

© Diodes Incorporated

Share Link: