Data brief
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April 2011 Doc ID 018695 Rev 1 1/5
5
EVL185W-LEDTV
185 W power supply with PFC and standby supply for LED TV
based on the L6564, L6599A and Viper27L
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
Description
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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Efficiency EVL185W-LEDTV
2/5 Doc ID 018695 Rev 1
1 Efficiency
Thanks to the chipset used, the main peculiarities of this design are the very high efficiency
as well as the very low input consumption during standby operation.
Table 1. Overall efficiency measured at 230 Vac mains voltage
Test
230 V - 50 Hz
12 V 24 V 130 V 5 V Pout
[W]
Pin
[W]
Eff.
[%]
Vout
[V]
Iout
[A]
Vout
[V]
Iout
[A]
Vout
[V]
Iout
[A]
Vout
[V]
Iout
[A]
25% load eff. 11.95 1.00 24.19 0.50 128.89 0.15 5.05 0.50 46.09 52.00 88.6
50% load eff. 11.93 2.01 24.28 1.00 129.95 0.31 5.04 1.00 93.30 101.50 91.9
75% load eff. 11.90 3.01 24.38 1.50 131.05 0.47 5.04 1.50 141.67 151.90 93.3
100% load eff. 11.88 3.99 24.48 2.00 132.18 0.62 5.04 2.00 187.96 201.50 93.3
Average eff. 91.8
Table 2. Overall efficiency measured at 115 Vac mains voltage
Test
115 V - 60 Hz
12 V 24 V 130 V 5 V Pout
[W]
Pin
[W]
Eff.
[%]
Vout
[V]
Iout
[A]
Vout
[V]
Iout
[A]
Vout
[V]
Iout
[A]
Vout
[V]
Iout
[A]
25% load eff. 11.95 1.00 24.19 0.50 128.89 0.15 5.05 0.50 46.09 52.35 88.0
50% load eff. 11.93 2.01 24.28 1.00 129.95 0.31 5.04 1.00 93.30 102.85 90.7
75% load eff. 11.90 3.01 24.38 1.50 131.05 0.47 5.04 1.50 141.67 154.92 91.4
100% load eff. 11.87 3.99 24.47 2.00 132.15 0.62 5.04 2.00 187.76 206.84 90.8
Average eff. 90.2
EVL185W-LEDTV Efficiency
Doc ID 018695 Rev 1 3/5
Figure 1. Standby consumption
0IN;M7=
0OUT;M7=
6(Z
6(Z
!-6
Revision history EVL185W-LEDTV
4/5 Doc ID 018695 Rev 1
2 Revision history
Table 3. Document revision history
Date Revision Changes
04-Apr-2011 1 Initial release.
EVL185W-LEDTV
Doc ID 018695 Rev 1 5/5
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