Diodes AH289 User Manual download pdf

AH289

HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR

CONTROLLER

AH289 Rev. 11 1 of 9 APRIL 2010

DS31052

www.diodes.com © Diodes Incorporated

• On Chip Hall Sensor

• Rotor-Locked Shutdown

• Automatically Restart

• Rotor-State Detection (RD) Output

• Built-in Zener Protection for Output Driver

• Operating Voltage: 3.8V~28V

• Output Current: I

O (AVE)

= 400mA

• Lead Free Package: SOT89-5L (Note 1)

• SOT89-5L: Available in “Green” Molding Compound

(No Br, Sb)

• Lead Free Finish/ RoHS Compliant (Note 2)

AH289 is a monolithic fan motor controller with Hall sensor’s

capability. It contains two complementary open-drain transistors

for motors coil driving, an automatic lock current shutdown, and

recovery protection. In addition, the Rotor-State Detection (RD)

output is for Rotor-State Detection.

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

289

Vdd

(24V)

Coil2

Coil1

* Rpu : typical 10 Kohm

5 4

48V

GND

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, V

=27V. Which C1and D3

value need to be fine tuned to optimize design for different coils and power suppliers.

24V DC Brush-Less Fan with RD Output Function

Features

General Description

1 2 3 4 5 6 7 8 9

Summary of Contents

Page 1 -

AH289HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER AH289 Rev. 11 1 of 9

Page 2 - Pin Descriptions

AH289HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER AH289 Rev. 11 2 of 9

Page 3 - Block Diagram

AH289HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER AH289 Rev. 11 3 of 9

Page 4 - CONTROLLER

AH289HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER AH289 Rev. 11 4 of 9

Page 5

AH289HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER AH289 Rev. 11 5 of 9

Page 6 - Operating Characteristics

AH289HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER AH289 Rev. 11 6 of 9

Page 7 - Marking Information

AH289HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER AH289 Rev. 11 7 of 9

Page 8

AH289HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER AH289 Rev. 11 8 of 9

AH289HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER AH289 Rev. 11 9 of 9

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