Diodes AH289 User Manual

AH289

HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR

CONTROLLER

Features

• 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

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

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

(No Br, Sb)

• Lead Free Finish/ RoHS Compliant (Note 2)

O (AVE)

= 400mA

Typical Application Circuit

Vdd

(24V)

R

D1

pu

RD

General Description

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 shutdow n detection circuit turns off the out put 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. U ntil the blocking is removed, the motor recovers and runs normally.

D2

5 4

289

Coil2

Coil1

48V

D3

132

C1

GND

* Rpu : typical 10 Kohm

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

=27V. Which C1and D3

Z

48V

24V DC Brush-Less Fan with RD Output Function

AH289 Rev. 11 1 of 9 APRIL 2010

DS31052

www.diodes.com © Diodes Incorporated

Ordering Information

HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR

CONTROLLER

AH289 - Y L - 13

PackingPackage Lead Free

AH289

Y : SOT89-5L

L : Lead Free (Note 1)

13 : Tape & Reel

G : Green

Device

AH289-YL-13 Y SOT89-5L 2500/Tape & Reel -13 AH289-YG-13 Y SOT89-5L 2500/Tape & Reel -13

Notes: 1. AH289-YL-13 will be replaced b y AH289-YG-13

2. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html.

3. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at

http://www.diodes.com/datasheets/ap02001.pdf.

4. Reverse taping as shown on Diodes Inc. Surface Mount (SMD) Packaging document AP02007, which can be found on our website http://www.diodes.com/datasheets/ap02007.pdf.

Package

Code

Packaging

(Note 3)

Quantity Part Number Suffix

13” Tape and Reel

Pin Assignments

( Top View )

Vdd

GND

DO

1

289

2

3

RD

5

7

4

DOB

SOT89-5L

Pin Descriptions

Pin Name Pin No. Description

Vdd 1 Input power

GND 2 Ground

DO 3 Output pin

DOB 4 Output pin

RD 5 Rotor-State Detection

AH289 Rev. 11 2 of 9 APRIL 2010

DS31052

Block Diagram

Vdd

HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR

CONTROLLER

Lock shutdown

Automatic recovery

and

AH289

Regulator

Hall

Plate

Amp.

Control Logic

DO

DOB

GND

AH289 Rev. 11 3 of 9 APRIL 2010

DS31052

RD