AH284

Hall-Effect Smart Fan Motor Controller

This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of

this product. No rights under any patent accompany the sale of the product.

Rev. 0.5 Jan 17, 2005

1/9

Features

- On chip Hall sensor

- Rotor-locked shutdown

- Automatically restart

- Built-in Zener protection for output driver

- Operating voltage: 3.8V~20 V

- Package: SIP-4L, SOT23-5L, SOT89-5L

Pin Assignment

284

12

4

3

1 : VCC

2 : DO

3 : DOB

4 : GND

Front View

SIP-4L

1

2

3

74

5

DOB

DO

GND

NC

VCC

SOT89-5L

284

1

3

2

5

4

SOT23-5

NC GND

DO

DOB

VCC

284

General Description

AH284 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.

To avoid coil burning, rotor-lock shutdown detection

circuit shut down the output driver if the rotor is

blocked and then the automatic recovery circuit will

try to restart the motor. This function repeats while

rotor is blocked. Until the blocking is removed, the

motor recovers running normally.

Pin Descriptions

Name

Description

VCC

Input power

DO

Output pin

DOB

Output pin

GND

Ground

NC

Not connected

Ordering Information

AH284 X -X X X

Packing

Blank : Tube or Bulk

A : Tape & Reel

P: SIP-4L

W:SOT23-5L

Y: SOT89-5L

Package

Lead

L : Lead Free

Blank: Normal

Wafer Body

Blank or

A~Z : if necessary

to specify