Low Voltage Hall-Effect Smart Fan Motor Controller
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:
I
O( AVE )
= 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
Vdd
5
DOB
4
Vdd 1
5 RD
AH293
7 DOB
4
SOT89-5L
293
( Front View )
1 : RD
2 : Vdd
3 : DO
4 : DOB
5 : GND
293
GND 2
1
RD
2
3
DO 3
1 2 3 4 5
SIP-5L
GND DO
SOT23-5
Pin Descriptions
Symbol
RD
Vdd
DO
DOB
GND
Description
Rotor-state detection
Input power
Output pin
Output pin
Ground
Ordering Information
AH293 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
Packing
Blank : Bulk
A : Tape & Reel
(for SOT Packages Only)
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. 1.1 Oct 5, 2005
1/9
AH293
Low Voltage Hall-Effect Smart Fan Motor Controller
Block Diagram (SIP5)
Vdd
2
Lock shutdown
and
Automatic recovery
Regulator
3
Hall
Plate
DO
Amp.
Control Logic
4
DOB
5
GND
1
RD
Typical Application Circuit
D2
Vdd
(1.8V/5.75V)
R
pu
D1
1
2
293
Coil2
3
4
5
Coil1
RD
(alarm)
Notes: R1, R2: typical 56
Ω
F
C1, C2, C3: typical 2.2
μ
The R, C value need to be fine tuned
base on coils design.
GND
C3
R1
C1
R2
C2
1.8V/5.75V DC Brush-less Fan with RD output function
Anachip Corp.
www.anachip.com.tw
2/9
Rev 1.1 Oct 5, 2005
AH293
Low Voltage Hall-Effect Smart Fan Motor Controller
Absolute Maximum Ratings
Characteristics
Operating Supply Voltage
Output Current
Power Dissipation
Operating Temperature
Storage Temperature
Maximum Junction Temp.
P
D
Topr
Tstg
Tj
(Ta = 25°C)
Symbol
Vdd
I
O(AVE)
I
O(PEAK)
SIP5
SOT23-5
SOT89-5
Rating
8
400
700
550
230
800
-20 ~ 100
-55 ~ 150
150
Unit
V
mA
mW
°C
°C
°C
Electrical Characteristics
(
Ta = 25
°C,
Vdd = 5V, unless otherwise notice)
Characteristics
Supply Voltage
Supply current
Locked Protection On
Locked Protection Off
Output saturation voltage
Output On resistance
RD output Vds
Output Zener-breakdown Voltage
Symbol
Vdd
Idd
Tlrp-on
Tlrp-off
V
OUT( sat )
Conditions
Operating
Operating
Min.
1.8*
-
-
2.4
-
-
-
-
-
Typ.
-
2.6
0.4
3
300
600
1.75
0.5
15
Max.
5.75
4.0
-
3.6
-
-
-
-
-
Unit
V
mA
Sec
Sec
mV
ohm
V
V
I
O
=180mA
I
O
=350mA
I
O
=10mA
Rds(on)
Vol
Vz
*Note:
The output of IC will be switched after the supply voltage is over 1.8V, but the magnetic characteristics won't be normal until the
supply is over 2.0V.
Magnetic Characteristics
(
Ta = 25
°C,
Vdd = 5V, unless otherwise specified)
(1mT=10 Gauss)
Characteristics
Operate Point
Release Point
Hysteresis
Symbol
Bop
Brp
Bhy
Min.
--
-60
--
Typ.
30
-30
60
Max.
60
--
--
Unit
Gauss
Gauss
Gauss
Anachip Corp.
www.anachip.com.tw
3/9
Rev 1.1 Oct 5, 2005
AH293
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 1.1 Oct 5, 2005
AH293
Low Voltage Hall-Effect Smart Fan Motor Controller
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