AH293

Low Voltage 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 Jun 18, 2004

1/9

Features

- On chip Hall sensor

- Rotor-locked shutdown

- Automatically restart

- Rotor-state detection (RD) output

- Buil t-in Zener protection for output driver

- Operating voltage: 1.8V~5.75 V

- Output current:

)

AVE

(

O

I

= 400 mA

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

General Description

AH293 is a monolithic fan motor controller with Hall

sensor’s capability. It contains two complementary

open-collector transistors for motor’s coil driving,

automatic lock current shutdown, and recovery

protections. Besides, rotor-state detection (RD)

output is for speed detection.

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. These protecting actions are

repeated and periodic during the blocked period.

Until the blocking is removed, the motor recovers

running normally.

Pin Configuration

1 : RD

2 : VCC

3 : DO

4 : DOB

( Front View )

15

4

3

2

293

5 : GND

SIP-5L

1

3

2

5

4

SOT23-5

VCC GND

DO

DOB

RD

293

1

2

3

74

5

DOB

DO

GND

RD

VCC

SOT89-5L

AH293

Pin Descriptions

Symbol

Description

RD

Rotor-state detection

VCC

Input power

DO

Output pin

DOB

Output pin

GND

Ground

Ordering Information

AH293 X - X X X

Packing

Blank : Tube or Bulk

A : Tape & Reel

P: SIP-5L

Package

Lead

L : Lead Free

Blank: Normal

Wafer Body

Blank or

A~Z : if necessary

to specify

W: SOT23-5L

Y: SOT89-5L