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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.
| Average OutputDrive Current (mA) | 600 |
|---|---|
| Frequency Generator (FG) and Rotation Detect | - |
| Lock Detect, Shut-Down and Auto Start | Yes |
| Operating Ambient Temperature (°C) | -40 to 125 |
| Operating Point Bop Gauss (Max) | 50 |
| Operating Point Bop Gauss (Min) | - |
| Operating Point Bop Gauss (Typ) | 20 |
| Operating Voltage (V) | 2.5 to 16 |
| Peak Output Current (mA) | 1200 |
| Release Point Brp Gauss (Max) | - |
| Release Point Brp Gauss (Min) | -50 |
| Release Point Brp Gauss (Typ) | -20 |
| SupplyCurrent (mA) | 4 |
| Typical Total RDS(ON)(NMOS and PMOS Combined) | 1.7 @ 12V |
| Typical Zener Breakdown Voltage (V) | 35 |
