AH292
Low Voltage Hall-Effect Smart Fan Motor Controller
Features
- On chip Hall sensor
-
Rotor-locked shutdown
-
Automatically restart
- Frequency generator (FG) output
- Buil t-in Zener protection for output driver
- Operating voltage: 1.8V~5.75 V
- Output current:
I
O( AVE )
= 400 mA
- Package: SIP-5L, SOT23-5L, SOT89-5L
General Description
AH292 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, frequency generator (FG)
output is for speed detection 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.
Pin Configuration
FG
5
DOB
4
292
( Front View )
1 : FG
2 : VCC
3 : DO
4 : DOB
5 : GND
VCC 1
292
5 FG
AH292
7 DOB
4
SOT89-5L
GND 2
3
1
2
DO 3
1 2 3 4 5
SIP-5L
VCC GND DO
SOT23-5
Pin Descriptions
Symbol
FG
VCC
DO
DOB
GND
Description
Frequency generation
Input power
Output pin
Output pin
Ground
Ordering Information
AH292 X - X X X
Wafer Body
Blank or
A~Z : if necessary
to specify
Package
P: SIP-5L
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. 0.5 Jun 18, 2004
1/9
AH292
Low Voltage Hall-Effect Smart Fan Motor Controller
Block Diagram (SIP5)
VCC
2
Lock shutdown
and
Automatic recovery
Regulator
3
Hall
Plate
DO
Amp.
Control Logic
4
DOB
5
GND
1
FG
Typical Application Circuit
D1
Vcc
(1.8V/5.75V)
R
pu
+
292
Coil2
1
2
3
4
5
C1
10uF
Coil1
FG
GND
1.8V/5.75V DC Brush-less Fan with FG output function
Anachip Corp.
www.anachip.com.tw
2/9
Rev 0.5 Jun 18, 2004
AH292
Low Voltage Hall-Effect Smart Fan Motor Controller
Absolute Maximum Ratings
Characteristics
Output Zener-breakdown Voltage
Operating Supply Voltage
Output Current
Power Dissipation
Operating Temperature
Storage Temperature
Maximum Junction Temp.
P
D
Topr
Tstg
Tj
(Ta = 25°C)
Symbol
Vz
V
CC
I
O(AVE)
I
O(PEAK)
SIP5
SOT23-5
SOT89-5
Rating
38
8
400
500
550
230
800
-20 ~ 100
-55 ~ 150
150
Unit
V
V
mA
mW
°C
°C
°C
Electrical Characteristics
(
Ta = 25
°C,
V
CC
= 5V, unless otherwise notice)
Characteristics
Supply Voltage
Supply current
Locked Protection On
Locked Protection Off
Output saturation voltage
Symbol
Vcc
I
cc
Tlrp-on
Tlrp-off
Conditions
Operating
Operating
Min.
1.8
-
-
-
-
-
-
-
Typ.
-
2.6
0.4
2.4
300
600
1.75
0.5
Max.
5.75
4.0
-
-
-
-
-
-
Unit
V
mA
Sec
Sec
V
OUT( sat )
Rds(on)
Vol
I
O
=180mA
I
O
=350mA
mV
ohm
V
Output On resistance
FG output Vds
I
O
=10mA
Magnetic Characteristics
(
Ta = 25
°
C, V
CC
= 5V, unless otherwise specified)
(1mT=10 Gauss)
Characteristics
Symbol
Min.
Typ.
Max.
Unit
Operate Point
Release Point
Hysteresis
Bop
Brp
Bhy
--
-60
--
30
-30
60
60
--
--
Gauss
Gauss
Gauss
Anachip Corp.
www.anachip.com.tw
3/9
Rev 0.5 Jun 18, 2004
AH292
Low Voltage Hall-Effect Smart Fan Motor Controller
Operating Characteristics
DOB
Output Voltage in Volts
Output Voltage in Volts
12
10
8
6
4
ON
2
OP
Vsat
Brp
0
Bop
Magnetic Flux Density in Gauss
DO
12
10
8
6
4
RP
Vsat
Brp
0
Bop
Magnetic Flux Density in Gauss
2
ON
RP
OFF
OFF
OP
Performance Characteristics (SIP5)
Ta (°C)
Pd (mW)
Ta (°C)
Pd (mW)
P d (m W )
600
500
400
300
200
100
0
0
25
50
75
100
125
150
T a (。 C )
25
550
105
198
50
440
110
176
60
396
115
154
70
352
120
132
80
308
125
110
85
286
130
88
90
264
135
66
95
242
140
44
100
220
150
0
P o w e r D is s ip a tio n C u rve
Anachip Corp.
www.anachip.com.tw
4/9
Rev 0.5 Jun 18, 2004
AH292
Low Voltage Hall-Effect Smart Fan Motor Controller
Performance Characteristics (SOT23-5)
Ta (°C)
25
50
60
70
80
90
100
110
120
130
140
150
Pd (mW)
P d (m W )
230
184
166
147
129
110
92
74
55
37
18
0
P o w e r D is s ip a tio n C u rv e
300
200
100
0
0
25
50
75
100
125
150
T a (。 C )
Performance Characteristics (SOT89-5)
Ta (°C)
25
50
60
70
75
80
85
90
95
100
Pd (mW)
Ta (°C)
800
105
640
110
576
115
512
120
480
125
448
130
416
135
384
140
352
145
320
150
Pd (mW)
P d (m W )
288
256
224
192
160
128
96
64
32
0
P o w e r D is s ip a tio n C u r v e
900
800
700
600
500
400
300
200
100
0
0
25
50
75
100
125
150
T a (
。
C )
Anachip Corp.
www.anachip.com.tw
5/9
Rev 0.5 Jun 18, 2004
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