Description
The AH5773 is a high performance, 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.
To simplify circuit design and minimize external components, the device integrates a stable high sensitivity Hall-effect sensor, voltage and temperature compensated internal references, amplifiers and the output H-bridge power switches with low RDSON. For system flexibility, the motor speed can be controlled by changing the duty ratio of the PWM signal at the PWM pin or adjusting the supply voltage.

FEATUREs
• Supports Single-Phase Full Wave BLDC Fan/Motor Drive
• Wide Operating Voltage Range: 2.4V to 18V
• Built-in High Sensitivity Hall Effect Sensor
• Built-in H-Bridge with Low RDSON Resistance
• PWM Input for Speed Control
• Standby Feature with IDD <100µA
• Soft Switching for Low Noise DC Fan Motor Applications
• Rotor Lock Protection with Automatic Re-Start
• tOFF Clear When PWM Is Low for Greater Than 65ms
• Over Voltage Shutdown
• Thermal Protection
• Tachometer (FG) Output
• Small Low-Profile Package: U-DFN2020-6 and MSOP-8EP with
   Exposed Pads for Power Handling Capability
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)

APPLICATIONs
• 5V/ 9V/ 12V/ 15V Min. BLDC Cooling Fans and Motors
• Netbook/ Notebook and Desktop BLDC Fans
• Instruments Cooling Fans
• Medium Voltage/ Low Power BLDC Motors