ANH002

ANH002
Application Note
AH280 Demo Board Smart Hall-Effect Fan Driver
Contents
1.
Features
2.
General Description
3.
Block Diagram
4.
Pin Configuration
5.
Absolute Maximum Ratings
6.
Typical Performance Characteristics
7.
Application Information
8.
Manufacturers and Distributor Contact Information
9.
Demo Board Schematic
This application note contains new product information. Diodes, Inc. reserves the right 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.
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ANH002
Application Note
AH280 Demo Board Smart Hall-Effect Fan Driver
1.0 Features
-
On Chip Hall Plate
Built-in Zener Protection for Output Driver
Built-in Protection Diode for Power Reverse Connecting
Rotor-Locked Detection
Automatically Restart after Release of Motor Locking
Adjustable Auto Restart Time
Operating Voltage: 3.5~20 V
Output Current: IO(AVE) = 500mA
Package: SIP-5L
Less External Components
2.0 General Description
AH280 is the integrated Hall sensor owning two complementary outputs for the motor’s coil driving,
auto locked shutdown and auto restart functions. The functional block diagram includes 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 a wide operational voltage range. The Hall voltage
generator is to amplify the Hall voltage due to the Hall effect. A Schmitt trigger is to provide switching
hysteresis for noise rejection. To avoid coil burning, the rotor-lock detection circuit will shutdown the output
driver if it detects rotor-lock status. A rotation recovery circuit is to restart the motor after the rotor-lock is
removed. In addition, the auto re-start time is flexible by adjusting the capacitance (CT).
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ANH002
Application Note
AH280 Demo Board Smart Hall-Effect Fan Driver
3.0 Block Diagram
Vcc
2
Regulator
Hall
sensor
Control
Logic
Lock Shutdown
Auto restart
circuits
3
DO
4
DOB
5
GND
1
CT
4.0 Pin Configuration
Front View
( Branded side)
1 2 3 4 5
Symbol
CT
VCC
DO
DOB
GND
P/I/O
Pin #
Description
I
P
O
O
P
1
2
3
4
5
Timing Cap
Positive Power Supply
Driver Output
Driver Inverted Output
Ground
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ANH002
Application Note
AH280 Demo Board Smart Hall-Effect Fan Driver
5.0 Absolute Maximum Ratings
( Ta = 25°C )
Characteristic
Symbol
Rating
Unit
VCB
36
20
500
800
700
-20~85
-55~150
V
V
Internal Zener-Protected Voltage
Operating Supply Voltage
VCC OPR
IO (AVE)
IO (PEAK)
PD
TOPR
TSTG
Output Current
Power Dissipation
Operating Temperature
Storage Temperature
mA
mW
°C
°C
6.0 Typical Performance Characteristics
1. Min. Start-up ( V = 3.5V, Icc = 0.06A )
a. CH1 = DO, CH2 = DOB, CH3 = CT, CH4 = I (DO):
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ANH002
Application Note
AH280 Demo Board Smart Hall-Effect Fan Driver
b. CH1 = DO, CH2 = DOB, CH3 = CT, CH4 = I (DOB):
c. CH1 = DO, CH2 = DOB, CH3 = CT for DC Fan Locked:
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ANH002
Application Note
AH280 Demo Board Smart Hall-Effect Fan Driver
6.0.2. Operation ( V = 12V, Icc = 0.18A )
a. CH1 = DO, CH2 = DOB, CH3 = CT, CH4 = I (DO):
b. CH1 = DO, CH2 = DOB, CH3 = CT, CH4 = I (DOB):
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ANH002
Application Note
AH280 Demo Board Smart Hall-Effect Fan Driver
c. CH1 = DO, CH2 = DOB, CH3 = CT for DC Fan Locked:
6.0.3. Max Working ( V = 20V, Icc = 0.29A )
a. CH1 = DO, CH2 = DOB, CH3 = CT, CH4 = I (DO):
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ANH002
Application Note
AH280 Demo Board Smart Hall-Effect Fan Driver
b. CH1 = DO, CH2 = DOB, CH3 = CT, CH4 = I (DOB):
c. CH1 = DO, CH2 = DOB, CH3 = CT for DC Fan Locked:
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ANH002
Application Note
AH280 Demo Board Smart Hall-Effect Fan Driver
6.0.4.
Vrpp Volt.
7.0 Application Information
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ANH002
Application Note
AH280 Demo Board Smart Hall-Effect Fan Driver
7.0.1 Parts List (Board of Materials):
L1
mH/Z (Ω)
Coil 1
Coil 2
Coil 1+ Coil 2
100HZ
9.28mH/36.05Ω
9.32mH /36.74Ω
37.26mH/75.88Ω
Item Part Number
MFG/Dist.
Description
Value
Quantity
EC1
Std
Aluminum Electrolytic
1uf/50V
1
C1
Std
Ceramic Capacitor
1uf/50V
1
C2
Std
Ceramic Capacitor
1uf/50V
1
D1
1N4001
SMD/Diode
50V, 2A
1
L1
BOARD-TECH
DIP/coil1, 2, com
50V, 2A
1
U1
AH280
20V, 0.5A
1
Hall Ic DIP
Anachip
8.0 Manufacturers and Distributor Contact Information
Anachip Corp.
易亨電子股份有限公司
Phone
Fax
Website
HAWYANG Electronics Co., LTD
浩陽科技有限公司
Phone
Fax
Website
Phone
+886-2-2655-1818
+886-2-2655-1616
http://www.anachip.com.tw
http://www.anachip.com
+886-2-2219-0903
+886-2-2219-3189
http://www.hawyang.com.tw
+886-2-8912-1688
Fax
Website
+886-2-8912-1699
http://www.jaenn.com.tw
JAENN Electronics Co., LTD
振遠科技有限公司
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ANH002
Application Note
AH280 Demo Board Smart Hall-Effect Fan Driver
9.0 Demo Board Schematic:
Typical PC Board Layout, Adjustable Output: (1x Size)
(1). Component Side PC Board Layout
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ANH002
Application Note
AH280 Demo Board Smart Hall-Effect Fan Driver
(2). Solder Side PC Board Layout
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