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