Anachip AH281A-P Hall-effect smart fan motor controller Datasheet

AH281
Hall-Effect Smart Fan Motor Controller
„ Features
„ General Description
- On chip Hall sensor
- Rotor-locked shutdown
- Automatically restart
- Built-in Zener protection for output driver
- Operating voltage: 10V~20 V, driver start up: 8V
(minimum)
- Output current: IO( AVE ) = 300 mA
AH281 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. This function repeats while
rotor is blocked. Until the blocking is removed, the
motor recovers running normally.
- Package: SIP-4L, SOT89-5L
„ Pin Assignment
„ Pin Descriptions
Front View
281
Name
VCC
DO
DOB
GND
NC
1 : VCC
2 : DO
3 : DOB
1 2
3
4
4 : GND
SIP-4L
VCC 1
GND 2
Description
Input power
Output pin
Output pin
Ground
Not connected
5 NC
AH281
DO 3
74 DOB
SOT89-5L
„ Ordering Information
AH281 X - X X X
Wafer Body
Package
Lead
Packing
Blank or
A~Z : if necessary
to specify
P: SIP-4L
Y: SOT89-5L
L : Lead Free
Blank: Normal
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. 0.7 Apr 16, 2004
1/7
AH281
Hall-Effect Smart Fan Motor Controller
„ Block Diagram (SIP4)
VCC
1
Lock shutdown
and
Automatic recovery
Regulator
Hall
Plate
2
DO
3
DOB
Control Logic
Amp.
4
GND
„ Application Circuit
12V
VCC
D1
C1 =10uF
+
L2
L1
281
1
2
3
4
GND
DOB
DO
12V brush-less DC fan
Anachip Corp.
www.anachip.com.tw
Rev 0.7 Apr 16, 2004
2/7
AH281
Hall-Effect Smart Fan Motor Controller
„ Absolute Maximum Ratings
(Ta = 25°C)
Characteristics
Symbol
Output Zener-breakdown Voltage
Operating Supply Voltage
Rating
Vz
VCC
38
28
300
400
550
800
-20 ~ 100
-55 ~ 150
150
IO(AVE)
IO(PEAK)
Output Current
Power Dissipation
SIP4
SOT89-5
PD
Operating Temperature
Storage Temperature
Maximum Junction Temp.
Unit
Topr
Tstg
Tj
V
V
mA
mW
°C
°C
°C
„ Electrical Characteristics (Ta = 25 °C, VCC =12V, unless otherwise specified)
Characteristics
Symbol
Conditions
Min.
Supply Voltage
Vcc
Operating
10
Supply current
Operating
-
Locked Protection On
Locked Protection Off
Icc
Tlrp-on
Tlrp-off
Output saturation voltage
VOUT( sat )
Output On resistance
Rds(on)
IO=150mA
IO=250mA
-
Typ.
Max.
20
V
2.0
4.0
mA
0.4
2.4
375
625
2.6
Unit
Sec
Sec
mV
ohm
„ Magnetic Characteristics (Ta = 25 °C, VCC = 12V, 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
Rev 0.7 Apr 16, 2004
3/7
AH281
Hall-Effect Smart Fan Motor Controller
„ Operating Characteristics
DO
12
RP
Output Voltage in Volts
Output Voltage in Volts
DOB
OFF
10
8
6
4
2
ON
OP
Vsat
Brp
0
12
OFF
OP
10
8
6
4
2
RP
ON
Vsat
Bop
Brp
Magnetic Flux Density in Gauss
0
Bop
Magnetic Flux Density in Gauss
„ Performance Characteristics (SIP4)
Ta (°C)
25
50
60
70
80
85
90
95
100
105
110
115
120
Pd (mW) 550 440 396 352 308 286 264 242
220
198
176
154
132
P o w e r D is s ip a tio n C u rve
P d (m W )
600
500
400
300
200
100
0
25
50
75
100
125
150
T a (。 C )
Anachip Corp.
www.anachip.com.tw
Rev 0.7 Apr 16, 2004
4/7
AH281
Hall-Effect Smart Fan Motor Controller
„ Marking Information
(1)SIP-4L
( Top View )
281
X XX X X
Part Number
Blank : normal
L : Lead Free Package
~
ID Code
Nth week: 01~52
Year: "1" = 2001
"2" = 2002
(2)SOT89-5L
4
7
5
ID code
A~Z: Non-Lead Free
a~z : Lead Free
M : Month: A~L
Y : Year: 0-9
281 Y M X
1
2
3
Anachip Corp.
www.anachip.com.tw
Rev 0.7 Apr 16, 2004
5/7
AH281
Hall-Effect Smart Fan Motor Controller
„ Package Information
(1)SIP-4L
Active Area Depth
Package Sensor Location
Marking side
1.97mm
1.04mm
1
0.7mm
2
3
4
Package Dimension
o
5 -7
o
14.25mm
+/-1.25mm
1.55mm
+/-0.1mm
1.03mm
+/-0.1
o
o
3 -5
0.38mm
+/-0.03mm
3.81mm
+/-0.03mm
0.46mm +/-0.03mm
281
5.22mm
+/-0.1mm
4.20mm
+/-0.1mm
o
0.38mm
+/-0.03mm
o
3.65mm
+/-0.1mm
0.30mm
+/-0.1mm
5 -7
o
3 -5
o
0.2mm Max.
1.42mm+/-0.1mm
Anachip Corp.
www.anachip.com.tw
1.27mm
+/-0.03mm
Rev 0.7 Apr 16, 2004
6/7
AH281
Hall-Effect Smart Fan Motor Controller
(2)SOT89-5L
A
C
D
F
B
E
K
J
F
L
I
H
G
Package Sensor Location
Y
X
Symbol
A
B
C
D
E
F
G
H
I
J
K
L
X
Y
Dimensions In Millimeters
Min.
Nom.
Max.
4.40
4.50
4.60
4.05
4.15
4.25
1.50
1.60
1.70
1.30
1.40
1.50
2.40
2.50
2.60
0.80
3.00 Ref.
1.50 Ref.
0.40
0.46
0.52
1.40
1.50
1.60
0.35
0.39
0.43
5o Typ.
1.90
1.65
-
Anachip Corp.
www.anachip.com.tw
Dimensions In Inches
Min.
Nom.
Max.
0.173
0.177
0.181
0.159
0.163
0.167
0.059
0.063
0.067
0.051
0.055
0.059
0.094
0.098
0.102
0.031
0.118 Ref.
0.059 Ref.
0.016
0.018
0.020
0.055
0.059
0.063
0.014
0.015
0.017
5o Typ.
0.075
0.065
-
Rev 0.7 Apr 16, 2004
7/7
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