Agamem Microelectronics Inc. PRELIMINARY AA51861 SINGLE-PHASE FULL-WAVE FAN MOTOR DRIVER !DESCRIPTION The AA51861 is a single-phase bipolar drive motor driver that easily implements direct PWM motor drive systems with excellent efficiency, The AA51861 is optimal for fan motor drive in personal computer power supply systems and CPU cooling fan systems. FEATURES z z z z z z z z Built-in Hall Bias Circuit Built-in PWM Speed Control Circuit Built-in Minimal Speed Setup Circuit Rotation Speed Indication (FG) Rotation or Lock State Indication (RD) Built-in Thermal Shutdown Circuit Lock Protection Maximum 1.0A (Vcc = 16V) Output Current APPILICATION z z CPU Cooler Fan in PC Brushless DC Motor Driver ©Copyright Agamem Microelectronics Inc. 1 www.agamem.com.tw 2009/4/23 AGAMEM MICROELECTRONICS INCOPERATION RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. AGAMEM DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCTS OR CIRCUIT DESRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.