FAN7585

www.fairchildsemi.com FAN7585 Intelligent Voltage Mode PWM IC Features Complete PWM Control and House Keeping Circuitry Few External Components Precision Voltage Reference Trimmed to 2% Dual Output for Push-Pull Operation Each Output TR for 200mA Sink Current Variable Duty Cycle by Dead Time Control Soft Start Capability by Using Dead Time Control Double Pulse Suppression Logic Over Voltage Protection for 3.3V/5V/12V Under Voltage Protection for 3.3V/5V/12V Over Current Protection for 3.3V/5V/12V One More External Input for Various Protection (PT) Remote On/Off Control Function (PS-ON) Latch Function Controlled by Remote and Protection Input Power Good Signal Generator with Hysteresis Description The FAN7585 is a fixed frequency improved performance pulse width modulation control circuit with complete housekeeping circuitry for use in the secondary side of SMPS (Switched Mode Power Supply). It contains various functions, which are overvoltage protection, undervoltage protection, over current protection, remote on/off control, power good signal generator, etc. OVP (Over Voltage Protection) Section It has OVP functions for +3.3V,+5V,+12V outputs and PT. The circuit is made up of a comparator with four detecting inputs and without hysteresis voltage. Especially, PT (Pin19) is prepared for an extra OVP input or another protection signal. UVP (Under Voltage Protection) Section It also has UVP functions for +3.3V, +5V, +12V outputs. The block is m...