Diodes AH9280 User Manual
Two Phase Dual-coil High Voltage Smart Fan Motor Driver AH9280
Data Sheet
General Description
The AH9280 is a most advanced smart fan controller
and Hall IC driver manufactured by special CMOS
process. It is designed for 5V and 12V cooling fan.
To allow survival in a harsh environment and lower
the total system cost, the AH9280 has been designed
with many powerful functions while almost
eliminating all discrete components, such as,
capacitor, resistor, transistor, diode and PC board.
The AH9280 can operate normally in an ambient
temperature up to 125°C due to its Hall IC circuitry
and power MOSFET output that allow low power
dissipation.
When there is no motion for one second, the IC will
automatically detect the locked rotor conditions, and
enter protection mode, shutting off the motor driver
for five seconds. Then, the IC will turn on the motor
driver for one second to detect whether there is
rotation condition, if fails, the IC will shut off motor
driver for five seconds again. This sequence will be
repeated until rotation condition is detected, and the
IC enters normal operation. This feature can
effectively prevent the AH9280 from overheating and
damage due to long-time locked rotor condition.
Specially designed for driving large fans, the AH9280
is optimized for low start-up voltage.
The AH9280 is available in TO-94 package.
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
• 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/Small Sized Fan
TO-94
Figure 1. Package Type of AH9280
Oct. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
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Data Sheet
Two Phase Dual-coil High Voltage Smart Fan Motor Driver AH9280
Pin Configuration
Z4 Package
(TO-94)
4
3
2
1
Figure 2. Pin Configuration of AH9280 (Front View)
Pin Description
Pin Number Pin Name Function
1 VCC Power supply pin
2 DO Output pin 1
3 DOB Output pin 2
4 GND Ground pin
Oct. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
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Data Sheet
Two Phase Dual-coil High Voltage Smart Fan Motor Driver AH9280
Functional Block Diagram
Figure 3. Functional Block Diagram of AH9280
Ordering Information
AH9280 -
Circuit Type
Package
Z4: TO-94
Package
TO-94
BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant
and green.
Oct. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
Temperature
Range
-40 to 125
°C
Part Number Marking ID Packing Type
AH9280Z4-G1 9280Z4-G1 Bulk
3
G1: Green
Data Sheet
Two Phase Dual-coil High Voltage Smart Fan Motor Driver AH9280
Absolute Maximum Ratings (Note 1, TA=25°C)
Parameter Symbol Value Unit
Supply Voltage VCC 18 V
Peak Output Current I
Continuous Output Current I
Supply Current (Fault) ICC 6 mA
Power Dissipation PD 600 mW
Thermal Resistance (Junction to Ambient) θJA 208
Storage Temperature T
ESD (Human Body Model) ESD 6000 V
ESD (Machine Model) ESD 400 V
1200 mA
OUT_P
600 mA
OUT_C
°C/W
-55 to 150
STG
°C
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 Symbol Min Max Unit
Supply Voltage VCC 2.5 16 V
Ambient Temperature TA -40 125
°C
Oct. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
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