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PDF AH9282 Data sheet ( Hoja de datos )
| Número de pieza | AH9282 | |
| Descripción | Two Phase Dual-coil High Voltage Smart Fan Motor Driver | |
| Fabricantes | BCD | |
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Data Sheet
Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD AH9281/82
General Description
The AH9281/82 is a one-chip solution for driving
two-coil brushless DC motors and fans.
Based on the advanced CDMOS process, the IC
contains a Hall-effect sensor, dynamic offset
correction and powerful output drivers with 1200mA
peak output current capability.
Specially designed for driving large fans, the device
is optimized for low start-up voltage. Frequency
Generator or Rotation Detection is available. The
open drain output makes easier the connectivity with
any external interface such as hardware monitoring or
Super I/O IC.
The AH9281/82 is available in TO-95 and SOT-89-5
packages.
Features
• High Sensitivity Integrated Hall Sensor
• Low Start-up Voltage
• 5V and 12V Operation
• Peak Output Current up to 1200mA
• Power Efficient CMOS and Power MOSFETs
• Built-in Output Protection Clamping Diode
• Locked Rotor Shutdown and Auto-restart
• Integrated Tachometer (AH9281) or Alarm
(AH9282) Signal Output
• ESD Rating: 6000V (Human Body Model)
400V (Machine Model)
Applications
• 5V/12V DC Brushless Motor/Fan
• PC, Server, Laptop Cooling Fan
• Power Supply Cooling Fan
• Large or Small Fans
TO-95
SOT-89-5
Figure 1. Package Types of AH9281/82
Oct. 2011 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
1
1 page  
Data Sheet
Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD AH9281/82
Absolute Maximum Ratings (Note 1, TA=25ºC)
Parameter
Supply Voltage
Supply Current (Fault)
Peak Output Current
Continuous Output Current
FG/RD Pull-up Voltage
Power Dissipation
Thermal Resistance
(Junction to Ambient)
Storage Temperature
ESD (Human Body Model)
ESD (Machine Model)
Symbol
VCC
ICC
IOUT_P
IOUT_C
VFG/VRD
PD
θJA
TSTG
ESD
ESD
Value
18
6
1200
600
28
TO-95
600
SOT-89-5
800
TO-95
208
SOT-89-5
156
-55 to 150
6000
400
Unit
V
mA
mA
mA
V
mV
ºC/W
ºC
V
V
Note 1: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to
the device. These are stress ratings only, and functional operation of the device at these or any other conditions
beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute
Maximum Ratings” for extended periods may affect device reliability.
Recommended Operating Conditions
Parameter
Supply Voltage
Operating Ambient Temperature
Symbol
VCC
TA
Min
2.5
-40
Max
16
125
Unit
V
ºC
Oct. 2011 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
5
5 Page 
Data Sheet
Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD AH9281/82
Typical Application (Continued)
Figure 16. Typical Application 2 of AH9281/82 (TO-95, Note 3)
Note 3:
1. D1 is an ordinary diode used to filter the noise from VCC and protect IC if VCC and GND are plugged
reversed.
2. R1=47Ω typical.
3. C1 =2.2µF typical, electrolytic capacitors are better. They should be fine tuned based on system design.
4. ZD1 and ZD2 breakdown voltage are 35V.
5. RPU=4.7kΩ typical.
Oct. 2011 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet AH9282.PDF ] | |
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