AH5794：Single Phase
| Part Number | Data Sheet | SPICE Model | Operating Voltage (V) | SupplyCurrent (mA) | Average OutputDrive Current (mA) | Peak Output Current (mA) | Typical Total RDS(ON)(NMOS and PMOS Combined) (Ω) | Operating Point Bop Gauss (Min) | Operating Point Bop Gauss (Typ) | Operating Point Bop Gauss (Max) | Release Point Brp Gauss (Min) | Release Point Brp Gauss (Typ) | Release Point Brp Gauss (Max) | Soft-Switch | Speed Control (VDD or VDC or PWM) | Lock Detect, Shut-Down and Auto Start | Frequency Generator (FG) and Rotation Detect (RD) | Operating Ambient Temperature (°C) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AH5794 | AH5794.pdf | - | 1.8 to 6 | 2.2 | 1000 | 300 500 | 1 @ 5V | 10 | 25 | 50 | -50 | -25 | -10 | Yes | VDD | - | FG | -40 to +105 |
Description
The AH5794 is a single chip solution for driving single-coil brushless direct current (BLDC) fans and motors. The integrated full-bridge driver output stage uses soft switching to minimize audible switching noise and electromagnetic interference (EMI) providing a low noise solution. Low operating voltage down to 1.8V allows motor speed to be control°C by varying the supply voltage. To help protect the motor coil, the AH5794 provides Rotor Lock Protection which shuts down the output drive if rotor lock is detected. The device automatically re-starts when the rotor lock is removed. Over temperature shutdown provides thermal protection for the device. A Tachometer output is provided by open-drain Frequency Generator (FG) Pin which allows external interface to monitor motor rotation or speed. The FG output is the magnetic change frequency.
Application
- 3V/ 3.3V/ 5V BLDC Cooling Fans
- Netbook/ Notebook BLDC fans
- Instruments cooling fans
- Low Voltage/ Low Power BLDC Motors
Features
- Supports single-coil full-wave BLDC fan drivers
- Built-in Hall sensor and input amplifier
- Operating voltage: 1.8V to 6V
- VDD voltage speed control
- Soft switching for low noise DC fan motor applications
- Rotor Lock Protection (Lock detection, output shutdown and automatic re-start)
- Thermal protection
- Tachometer (FG) output
- No external timing capacitor - Reduces the numbers of external components required
- Low profile package: TSOT26 and U-DFN2020C-6
- Halogen and Antimony free “Green” packages.
- Lead Free Finish/ RoHS Compliant
Ordering Information
- AH5794-FDC-7
- AH5794-WU-7
U-DFN2020-6
TSOT26
- AH5794.pdf AH5794
