Anachip AH280A-PA Hall-effect smart fan driver Datasheet

AH280
Hall-Effect Smart Fan Driver
„ Features
„ General Description
- On chip Hall plate
- Built-in Zener diode protection for output driver
- Built-in protection diode for power reverse
connecting
- Rotor-lock detection
- Automatically restart after release of motor
locking
- Adjustable auto restart time
- Operating voltage: 3.5~20 V
- Max Output current: IO(AVE) = 500mA
- Packages: SIP-5L, SOP-8L, SOP-8L EP
- Less external component
AH280 is the integrated Hall sensor owned two
complementary outputs for motor’s coil driving, auto
locked shutdown and auto restart functions.
Functional block diagram includes that a regulator
with temperature-compensated band-gap, an
on-chip Hall voltage generator, a comparator, a
Schmitt trigger and two current output drivers. The
regulator can provide wide operational voltage
range. The Hall voltage generator is to amplify the
Hall voltage due to Hall effect. A Schmitt trigger is
to provide switching Hysteresis for noise rejection.
To avoid coil burning, rotor-lock detection circuit will
shutdown the output driver if detect rotor-lock status.
A rotation recovery circuit is to restart the motor
after rotor-lock is removed. In addition, the auto
re-start time is flexible by adjusting the capacitance
(CT).
„ Pin Assignments
„ Pin Descriptions
Front View
SIP-5L
Symbol P/I/O Pin #
( Branded side)
1 2 3 4 5
SIP-5L
Description
CT
I
1
Timing cap.
VCC
P
2
Positive power supply
DO
O
3
Driver output
DOB
O
4
Driver inverted output
GND
P
5
Ground
SOP-8L/SOP-8L EP
( Top view )
VCC
1
8
CT
DO
2
7
NC
DOB
3
6
NC
NC
4
5
GND
Symbol
Pin #
Description
VCC
1
Positive power supply
DO
2
Driver output
DOB
3
Driver inverted output
NC
4,6,7
CT
8
Timing cap.
GND
5
Ground
Not connected for SOP8
SOP-8L / SOP-8L EP
This datasheet contains new product information. Analog 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
AH280
Hall-Effect Smart Fan Driver
„ Block Diagram
Vcc
2
Regulator
Hall
sensor
Control
Logic
Amp
Lock Shutdown
Auto restart
circuits
3
DO
4
DOB
5
Gnd
1
CT
„ Ordering Information
AH280 X - X X X - X
Wafer Body
Package
Lead
Packing
Blank or
A~Z : if necessary
to specify
P: SIP-5L
S: SOP-8L
SP: SOP-8L EP
L : Lead Free
Blank: Normal
Blank : Tube or Bulk
A : Tape & Reel
Magnetic
Characteristics
A or B
„ Application Circuit
10µF
C1
( Top view )
D
Coil1
AH280
Coil2
Power
input
CT
( DC Brush-less Fan )
Anachip Corp.
www.anachip.com.tw
Rev. 0.7 Apr 16, 2004
2/7
AH280
Hall-Effect Smart Fan Driver
„ Absolute Maximum Ratings
(TA = 25°C)
Characteristics
Operating Supply Voltage
Output Current
Power Dissipation
PD
Operating Temperature
Storage Temperature
DO(DOB) Vceo D.C. Voltage
„ Electrical Characteristics
Characteristics
Internal Zener-protected Voltage
Output saturation voltage
Charge current
Discharge current
Automatic
self-rotation
recovery
circuit
Limiting voltage
On time
Duty ratio
Rating
20
500
800
550
1000
-20~85
-55~150
40
Unit
V
mA
mW
°C
°C
Vdc
(TA=25°C, VCC=12V, CT=1µF)
Symbol
VZ
Quiescent current
Symbol
VCC
IO (AVE)
IO (PEAK)
SIP-5L / SOP-8L
SOP-8L EP
TOPR
TSTG
Vceo
IQ
DO
DOB
ICHG
IDHG
VCL
VCP
TON
DR
Test Conditions
VCC=5V
Output1 “ON”
VCC=12V
Output1 “ON”
IO=0.2A, TJ=25°C
IO=0.4A, TJ=25°C
IO=0.5A, TJ=25°C
Clamp Voltage
Comparator Voltage
CT=.47µF
TOFF / TON
Min, Typ.
46
Max.
-
10
15
20
10
17
20
3
0.4
0.6
0.7
2.4
0.5
2.0
1.0
250
5
7
Unit
V
mA
V
µA
µA
V
ms
-
„ Magnetic Characteristics
(1mT = 10 Gauss)
A grade
Characteristics
Operate Point
Release Point
Hysteresis
B grade
Characteristics
Operate Point
Release Point
Hysteresis
Symbol
BOP
BRP
BHYS
Symbol
BOP
BRP
BHYS
Anachip Corp.
www.anachip.com.tw
TA= -20°C to
Min.
Typ.
10
-60
100
+85°C
Max.
60
-10
-
TA= -20°C to
Min.
Typ.
10
-80
100
+85°C
Max.
80
-10
-
Unit
G
G
G
Unit
G
G
G
Rev. 0.7 Apr 16, 2004
3/7
AH280
Hall-Effect Smart Fan Driver
„ Rotation detection
following manner.
A motor lock condition is
detected when the Hall signal stops switching.
The output is ON when CT pin is being charged,
and OFF when CT pin is being discharged.
The automatic restart circuit detects a motor lock
condition and automatically turns off the output
current. When the lock condition is cleared, the IC
automatically restarts and allows the motor to run.
In the AH280, automatic restart is performed in the
Hall input
ON
OFF
CT
clamp
voltage
Motor output
CT
comparator
voltage
CT
Motor locked
Motor locked detected
Ton*
Toff*
Motor locked
cleared
Reverts to normal operation
C is the capacitance of the CT pin external capacitor
VCL is the CT pin clamp voltage
VCP is the CT pin comparator voltage
ICHG is the CT pin charge current
IDHG is the CT pin discharge current
Output ON time (Ton) and OFF time (Toff)
Determined by the CT pin capacitor
Where
C × (VCL − V )
CP (sec)
I
CHG
C × (VCL − VCP )
(sec)
Toff=
I
DHG
Ton=
Anachip Corp.
www.anachip.com.tw
Rev. 0.7 Apr 16, 2004
4/7
AH280
Hall-Effect Smart Fan Driver
„ Performance Characteristics (SIP-5L / SOP-8L)
Ta (°C)
25
50
60
70
80
85
90
95
100
105
110
115
120
Pd (mW) 550 413 358 303 248 220 193 165
138
110
83
55
28
Power D issipation Curve
Pd (m W )
600
500
400
300
200
100
0
0
25
50
75 85
100
125
150
T a (。 C )
„ Performance Characteristics (SOP-8L EP)
Ta (°C)
25
50
60
70
80
85
90
95
100
105
110
115
120
Pd (mW) 1000 800 720 640 560 520 480 440
400
360
320
280
240
P o w e r D is s ip a t io n C u r v e
P d (m W )
1000
900
800
700
600
500
400
300
200
100
0
25
50
75
85
100
125
150
T a (。 C )
„ Marking Information
(1) SIP-5L
(2) SOP-8L / SOP-8L EP
( Front View )
Part Number
280
X XX X X
( Front View )
Blank: normal
L: Lead Free Package
Part Number
AH280
X XX X X
ID Code
Nth week: 01~52
Year: "1" = 2001
"2" = 2002
Blank : normal
L : Lead Free Package
ID Code
Nth week: 01~52
Year: "1" = 2001
"2" = 2002
Anachip Corp.
www.anachip.com.tw
Rev. 0.7 Apr 16, 2004
5/7
AH280
Hall-Effect Smart Fan Driver
„ Package Information
(1) Package Type: SIP-5L
unit: mm / [inch]
5.22 ± 0.1
[0.206 ± 0.003]
2° ~ 3°
2-0.3C
[0.079-0.012C]
2 ° ~ 5°
1.55 ± 0.1
[0.061 ± 0.003]
4.2 REF
[0.165 REF]
0.73 ± 0.1
[0.029 ± 0.003]
2° ~ 3 °
2° ~ 5 °
3.65 ± 0.1
[0.144 ± 0.003]
0.48 ± 0.1
[0.019 ± 0.003]
14.3 ± 0.3
0.38 ± 0.03
[0.563 ± 0.012]
[0.015 ± 0.001]
0.95 ± 0.03
0.38 ± 0.03
[0.037 ± 0.001]
[0.015 ± 0.001]
„ Location of sensing point
2.006 mm
[0.079 inch]
( Top View)
1.016 mm
[0.04 inch]
1
2
3
Anachip Corp.
www.anachip.com.tw
4
5
Rev. 0.7 Apr 16, 2004
6/7
AH280
Hall-Effect Smart Fan Driver
(2) Package Type: SOP-8L ( Normal / Expose Pad )
H
E
Expose Pad
Y
X
L
VIEW "A"
D
0.015x45
C
B
A1
e
7 (4X)
A
A2
7 (4X)
VIEW "A"
y
Dimensions In Millimeters
Min.
Nom.
Max.
A
1.40
1.60
1.75
A1
0.10
0.25
A2
1.30
1.45
1.50
B
0.33
0.41
0.51
C
0.19
0.20
0.25
D
4.80
5.05
5.30
E
3.70
3.90
4.10
e
1.27
H
5.79
5.99
6.20
L
0.38
0.71
1.27
y
0.10
0°
8°
θ
(Expose pad)
X
2.92
Y
2.34
Symbol
Dimensions In Inches
Min.
Nom.
Max.
0.055
0.063
0.069
0.040
0.100
0.051
0.057
0.059
0.013
0.016
0.020
0.0075
0.008
0.010
0.189
0.199
0.209
0.146
0.154
0.161
0.050
0.228
0.236
0.244
0.015
0.028
0.050
0.004
0°
8°
-
0.115
0.092
-
„ Sensor location
1.860 mm
2.132 mm
Anachip Corp.
www.anachip.com.tw
Rev. 0.7 Apr 16, 2004
7/7
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