RT7306DGS AC-DC LED Lighting Driver Electronic Integrated Circuits

1.General Description

The RT7306Dis a constant current LED driver with activepower factor correction. It supports highpower factor across a wide range of line voltages, and itdrives the converter in the Quasi-Resonant (QR) mode to achieve higher efficiency.By using Primary Side Regulation (PSR), the RT7306Dcontrols the output current accurately withouta shunt regulator and an opto-coupler atthe secondary side, reducing the external componentcount, the cost, and the volume of the driver board.RT7306Dis compatible with analog dimming. The output current can be modulatedby the DIM pin. An in-house design high voltage (HV)start-up device is integrated inthe RT7306Dto minimize the power loss and shorten the start-up time.The RT7306Dembeds comprehensive protectionfunctions for robust designs,including LED open-circuit protection, LED short-circuit protection, output diode short-circuit protection, VDDUnder-VoltageLockout(UVLO), VDD Over-Voltage Protection (VDD OVP), Over-Temperature Protection (OTP), and cycle-by-cycle current limitation

2.Features

Tight LED Current Regulation
No Opto-Coupler and TL431 Required
Power Factor Correction (PFC)
Compatible with Analog Dimming
Built-In HV Start-Up Device
Quasi-Resonant
Maximum/Minimum Switching Frequency Clamping
Maximum/Minimum On-Time Limitation
Wide VDD Range (up to 34V)
THD Optimization
Input-Voltage Feed-Forward Compensation
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

3.Applications
AC-DC LED Lighting Drive

4.

FunctionalBlock Diagram

5.FunctionalBlock Diagram

6.

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