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 )
15432
293
5 : GND

SIP-5L
1 32
5 4
SOT23-5
VCC GND DO
DOB
RD
293

1
2
3 74
5
DOBDO
GND
RDVCC
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