FAN7631

FAN7631 — Advanced PFM Controller for Half-Bridge Resonant Converters April 2012 FAN7631 Advanced Pulse Frequency Modulation (PFM) Controller for Half-Bridge Resonant Converters Features  Variable Frequency Control with 50% Duty Cycle for Half-Bridge Resonant Converter Topologies  High Efficiency with Zero-Voltage-Switching (ZVS)  Up to 600kHz Operating Frequency  Built-in High-Side Gate Driver  High Gate-Driving Current: +500mA/-1000mA  Programmable Dead Time with a Resistor  Pulse Skipping and Burst Operation for Frequency Limit (Programmable) at Light-Load Condition  Simple Remote On/Off Control with Latch or Auto-Restart (A/R) Using FI or LS Pin  Protection Functions: Over-Voltage Protection (OVP), Overload Protection (OLP), Over-Current Protection (OCP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD), and High Precise Line Under-Voltage Lockout (LUVLO)  Level-Change OCP Function During Startup Applications  PDP and LCD TVs  Desktop PCs and Servers  Video Game Consoles  Adapters  Telecom Power Supplies Description The FAN7631 is a pulse-frequency modulation controller for high-efficiency half-bridge resonant converters that includes a high-side gate drive circuit, an accurate current-controlled oscillator, and various protection functions. The FAN7631 features include variable dead time, operating frequency up to 600kHz, protections such as LUVLO, and a selectable latch or A/R protection using the LS pin for user convenience. T...