Universal AC Input 150W Single String 200V/700mA Output LLC Converter without CT


Design files


The reference design is a high effiency (>94%) isolated AC/DC single string output LED lighting solution for high watt (>100W) general LED lighting. The topology uses Transition Mode (TM) PFC plus LLC control, which can support PWM dimming and analog dimming on the output side. The target application for this reference design is TV LED backlight, outdoor and high-bay general LED lighting. CT is eliminated in the design and the PSR controller UCC28700 is used for aux power in order to reduce overall cost.

Output voltage options PMP4350.1
Vin (Min) (V) 90
Vin (Max) (V) 264
Vout (Nom) (V) 200
Iout (Max) (A) .7
Output Power (W) 140
Isolated/Non-Isolated Isolated
Input Type AC
Topology Flyback- Quasi Resonant^Half Bridge- LLC^PFC- Boost
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.


Test results for the reference design, including efficiency graphs, test prerequisites and more

SLURA46.PDF (69 K)

Detailed schematic diagram for design layout and components

SLURA47.PDF (201 K)

Complete listing of design components, reference designators, and manufacturers/part numbers


Includes TI products in the design and potential alternatives.

Flyback controllers

UCC28700Constant-voltage, constant-current PWM with PSR & Programmable cable compensation

Data sheet: PDF | HTML
LLC controllers

UCC25710LED TV backlight controller

Data sheet: PDF | HTML
Power factor correction (PFC) controllers

UCC28810LED Lighting Power Controller

Data sheet: PDF

Technical documentation

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Type Title Date
Test report PMP4350 Test Results Apr. 15, 2013

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