描述 Description

The RT7306S is a second-stage constant current LED driver. It drives the converter in the Quasi-Resonant (QR) mode to achieve higher efficiency. By using Primary Side Regulation (PSR), the RT7306S controls the output current accurately without a shunt regulator and an opto-coupler at the secondary side, reducing the external component count, the cost, and the volume of the driver board.



The RT7306S is compatible with analog dimming. The output current can be modulated by the DIM pin.



The RT7306S embeds comprehensive protection functions for robust designs, including LED open-circuit protection, LED short-circuit protection, output diode short-circuit protection, VDD Under-Voltage Lockout (UVLO), VDD Over-Voltage Protection (VDD OVP), Over-Temperature Protection (OTP), and cycle-by-cycle current limitation.

特性 Features

? Tight LED Current Regulation
? No Opto-Coupler and TL431 Required
? Compatible with Analog Dimming
? Quasi-Resonant
? Maximum/Minimum Switching Frequency Clamping
? Maximum/Minimum On-Time Limitation
? Wide VDD Range (up to 34V)
? Multiple Protection Features? LED Open-Circuit Protection? LED Short-Circuit Protection? Output Diode Short-Circuit Protection? VDD Under-Voltage Lockout? VDD Over-Voltage Protection ? Over-Temperature Protection ? Cycle-by-Cycle Current Limitation

應用 Application

? DC-DC LED Lighting Driver