STMicroelectronics 185 W power supply with PFC and standby supply for LED TV using the L6564, L6599A, and VIPER27L EVL18 EVL185W-LEDTV Data Sheet

For further information contact your local STMicroelectronics sales office.

April 2011

Doc ID 018695 Rev 1

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185 W power supply with PFC and standby supply for LED TV

based on the L6564, L6599A and Viper27L

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Universal input mains range: 90

÷264 Vac - 

frequency 45

÷65 Hz

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Output voltage 1: 130 V ±8 % at 620 mA for 
backlight

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Output voltage 2: 24 V ±8 % at 2 A for audio 
supply

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Output voltage 3: 12 V ±1 % at 4 A for panel 
supply

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Output voltage 4: 5 V ±2 % at 2 A for 
microprocessor supply

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Mains harmonics: acc. to EN61000-3-2 Class-
D or JEITA-MITI Class-D

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Standby mains consumption: <170 mW at 230 
Vac with 50 mW load

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Overall efficiency at full load: >90%

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EMI: according to EN55022-Class-B

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Safety: according to EN60065

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Dimensions: 115x204 mm, 25 mm maximum 
component height from PCB

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PCB: single side, 70 µm, CEM-1, mixed 
PTH/SMT introduction

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RoHS compliant

The EVL185W-LEDTV is a high-end 
demonstration board tailored to the specifications 
of a typical LED TV application. The peculiarities 
of this design are the very high average efficiency 
of about 90%, without synchronous rectification, 
and very low no load consumption of 100 mW at 
230 Vac. The result is that this converter is 
compliant to the most demanding ENERGY 
STAR

®

 eligibility criteria. The architecture is made 

up of two sections, based on a three-stage 
approach: a 10 W standby supply using the new 
VIPer27L, which delivers the 5 V standby 
dedicated to supplying the microprocessor and 

the logic circuitry, and a bigger section composed 
of a front-end PFC, using the new TM L6564 and 
an LLC resonant converter, using the L6599A, 
delivering three output voltages: 12 V dedicated 
to supplying the TV panel, 24 V to supplying the 
audio power amplifiers, and 130 V dedicated to 
the backlight.

The PFC stage delivers 400 V constant voltage 
and acts as the pre-regulator for both the LLC 
stage and the standby supply. 

An external signal, referred to secondary ground, 
turns the PFC and the LLC stage on and off.