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What is AH291?

This electronic component, produced by the manufacturer "ETC", performs the same function as "Low Voltage Hall-Effect Smart Fan Motor Controller".


AH291 Datasheet PDF - ETC

Part Number AH291
Description Low Voltage Hall-Effect Smart Fan Motor Controller
Manufacturers ETC 
Logo ETC Logo 


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Low Voltage Hall-Effect Smart Fan Motor Controller
AH291
„ Features
- On chip Hall sensor
- Rotor-locked shutdown
- Automatically restart
- Built-in Zener protection for output driver
- Operating voltage: 1.8V~5.75 V
- Output current: IO(AVE) = 400 mA
- Package: SIP-4L, SOT23-5L, SOT89-5L
„ Pin Assignment
„ General Description
AH291 is a monolithic fan motor controller with Hall
sensor’s capability. It contains two complementary
open-collector 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. These protecting actions are
repeated and periodic during the blocked period.
Until the blocking is removed, the motor recovers
running normally.
291 Front View
1 : VCC
2 : DO
3 : DOB
12 3 4
4 : GND
SIP-4L
„ Pin Descriptions
NC DOB
54
291
123
VCC GND DO
SOT23-5
VCC 1
5 NC
GND 2 AH291
DO 3
74 DOB
SOT89-5L
Name
VCC
DO
DOB
GND
NC
„ Ordering Information
Description
Input power
Output pin
Output pin
Ground
Not connected
AH291 X - X X X
Wafer Body
Blank or
A~Z : if necessary
to specify
Package
P: SIP-4L
W: SOT23-5L
Y: SOT89-5L
Lead
L : Lead Free
Blank: Normal
Packing
Blank : Tube or Bulk
A : Tape & Reel
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. 0.6 Jan 27, 2005
1/9

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AH291 equivalent
Low Voltage Hall-Effect Smart Fan Motor Controller
AH291
„ Performance Characteristics (SOT23-5)
Ta (°C) 25 50 60 70 80 90 100 110 120 130 140 150
Pd (mW) 230 184 166 147 129 110 92 74 55 37 18 0
Pd (m W )
300
200
100
0
0
P ow er D issipation C urve
25 50 75 100 125 150
Ta (C)
„ Performance Characteristics (SOT89-5)
Ta (°C)
Pd (mW)
Ta (°C)
Pd (mW)
25 50 60 70 75 80 85 90 95 100
800 640 576 512 480 448 416 384 352 320
105 110 115 120 125 130 135 140 145 150
288 256 224 192 160 128 96 64 32
0
P d (m W )
900
800
700
600
500
400
300
200
100
0
0
P o w e r D is s ip a tio n C u rv e
25
50
75
100
125
150
T a (C )
Anachip Corp.
www.anachip.com.tw
Rev 0.6 Jan 27, 2005
5/9


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AH291 datasheet


1. - Smart FAN Motor Controller

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Featured Datasheets

Part NumberDescriptionMFRS
AH291The function is Low Voltage Hall-Effect Smart Fan Motor Controller. ETCETC
AH291The function is Low Voltage Hall-Effect Smart Fan Motor Controller. ETCETC
AH291The function is LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER. Diodes IncorporatedDiodes Incorporated

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