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185 W power supply with PFC and standby supply for LED TV using the L6564, L6599A, and VIPER27L
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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.

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Data Brief

Key Features

  • Universal input mains range: 90÷264 Vac - frequency 45÷65 Hz
  • Output voltage 1: 130 V ±8 % at 620 mA for backlight
  • Output voltage 2: 24 V ±8 % at 2 A for audio supply
  • Output voltage 3: 12 V ±1 % at 4 A for panel supply
  • Output voltage 4: 5 V ±2 % at 2 A for microprocessor supply
  • Mains harmonics: acc. to EN61000-3-2 Class-D or JEITA-MITI Class-D
  • Standby mains consumption: <170 mW at 230 Vac with 50 mW load
  • Overall efficiency at full load: >90%
  • EMI: according to EN55022-Class-B
  • Safety: according to EN60065
  • Dimensions: 115x204 mm, 25 mm maximum component height from PCB
  • PCB: single side, 70 μm, CEM-1, mixed PTH/SMT introduction
  • RoHS compliant


Design Resources


Technical Documentation

Product Specifications

Description Version Size
DB1268: 185 W power supply with PFC and standby supply for LED TV based on the L6564, L6599A and Viper27L
1.1 115 KB

Hardware Resources

Bill of Materials

Description Version Size
BOM for EVL185W-LEDTV board
1.0 43 KB

Schematic Pack

Description Version Size
Board schematics for EVL185W-LEDTV board
1.0 71 KB

Sample & Buy

Part Number Marketing StatusCore ProductOrder From STUnit Price (US$)*
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
EVL185W-LEDTVActiveL6564, L6599A, VIPER27LBuy Direct245Distributor reported inventory date: 2016-02-10
Distributor NameRegionStockMin. order
Newark Element14Order NowAMERICA10

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
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