FAN8902

www.fairchildsemi.com FAN8902(KA3902) DC FAN Motor Controller Features Built-in PWM Current Control Circuit Built-in 5V Regulator Low Supply Current Stalled Motor Current Limitation Built-in Over Voltage Protection (OVP) Built-in Over Current Protection (OCP) Built-in Load Dump Protection Built-in Thermal Shutdown (TSD) Circuit Built-in Under Voltage Lockout (UVLO) Circuit Description The FAN8902 is a monolithic integrated circuit, designed for the PWM control of a DC fan motor current in an automotive systems. It allows the fan motor speed to be controlled linearly and efficiently. 14-DIP-300 Typical Application DC for Motor Control for Automotive Ordering Information Device FAN8902 Package 14-DIP-300 Operating Temperature -40°C ~ +90°C Rev. 1.0.3 ©2002 Fairchild Semiconductor Corporation FAN8902(KA3902) Pin Assignments CMD 1 14 La CMDa 2 13 VCC CMDb 3 12 OUT SG 4 FAN8902 11 PG RT / CT 5 10 CS VREF 6 9 CL CH 7 8 NC Pin Definitions Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Pin Name CMD CMDa CMDb SGND RT / CT VREF CH NC CL CS PGND OUT VCC La Pin Function Description Motor Current Command Input Optional OP Amplifier Output Optional OP Amplifier (-) Input Signal GND Oscillator Time Constant Voltage Reference (5V) Maximum Current Reference Input No Connection Minimum Current Reference Input Motor Current Sense Voltage Input Power GND Drive Output VCC Motor Current Maximum Reference Input 2 FAN8902(KA3902) Internal Blo...