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 controlled by varying the supply voltage.

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

Applications

• 3V/ 3.3V/ 5V BLDC Cooling Fans

• Netbook/ Notebook BLDC fans

• Instruments cooling fans

• Low Voltage/ Low Power BLDC Motors