The RT7339P is a constant voltage controller with the active Power Factor Correction (PFC), which is designed to meet the line current harmonic regulations. It drives the converter in Quasi-Resonant (QR) mode to achieve higher efficiency. By using the Primary-Side Regulation (PSR), the RT7339P controls the output voltage accurately without a shunt regulator and an opto-coupler at the secondary side, reducing the external component counts, the costs, and the volume of the driver board.
The RT7339P is compatible with the external depletion N-MOSFET to achieve fast startup and ultra-low standby power consumption.
The totem-pole gate driver with the 400mA sourcing current and 500mA sinking current provides the powerful driving capability for a power MOSFET to improve the conversion efficiency. In addition, the built-in soft drive at the turn-on transition is better for the EMI improvement.
The RT7339P integrates comprehensive protection functions for robust designs, including output over voltage protection, output short-circuit protection, output diode short-circuit protection, VDD under voltage lockout (UVLO), VDD over voltage protection (VDD OVP), input under / over voltage protection, external / internal over temperature protection (OTP), and cycle-by-cycle high/low line current limitation.
- LED Lighting
- AC-DC Adapter/Charger