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Phase-Cut Dimmable Primary-Side RegulationLED Driver Controller with Active PFC

RT7310

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The RT7310 is a high power factor constant current LED driver which is optimized for the compatibility with phase-cut dimmers. It supports high power factor across a wide range of line voltages, and it drives the converter in the Quasi-Resonant (QR) mode to achieve higher efficiency. By using Primary Side Regulation (PSR), RT7310 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 RT7310 supports phase-cut dimmers, including leading-edge (TRIAC) and trailing-edge dimmers.

RT7310 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 (OVP), Over-Temperature Protection (OTP), and cycle-by-cycle current limitation.

Applications

Key Spec.
RT7310
Status Active
Supply Voltage (min) (V)
Supply Voltage (max) (V)
Vin (min) (V) 12
Vin (max) (V) 25
Topology Buck-Boost;Flyback
Output C.C.
MOSFET Integrated No
PFC Y
Current Sense Threshold (mV)
Dimming Control
Features OCP;OVP
Package Type SOT-26
Features
  • Supporting Phase-Cut Dimmers
  • Tight LED Current Regulation
  • No Opto-Coupler and TL431 Required
  • Power Factor Correction (PFC)
  • Quasi-Resonant
  • Maximum/Minimum Switching Frequency Clamping
  • Maximum/Minimum On-Time Limitation
  • Wide VDD Range (up to 25V)
  • 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
Datasheet
TitleLast UpdateShareDownload
Phase-Cut Dimmable Primary-Side RegulationLED Driver Controller with Active PFC2014/11/19
Technical Documents
TitleLast UpdateShareDownload
Power Solutions for LED Lighting Applications2018/11/22
Minimizing Light Flicker in LED Lighting Applications2018/08/15
Evaluation Boards
TitleLast UpdateShareDownload
RT7310 Triac Dimming Bulb (180-264Vac, 75Vout, 180mA)2018/11/01
RT7310 Triac Dimming Bulb (90-132Vac, 75Vout, 180mA)2018/11/01
RT7310 Triac Dimming Bulb (90-132Vac, 72Vout, 120mA)2018/11/01
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT7310GESOT-263000 Not available Buy from Distributor
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