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Energy saving AC-DC converters
Green converters reduce standby consumption and boost efficiency by >90%
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Energy saving AC-DC converters
While technological progress has helped improve the quality of our lives, it has led to a dramatic increase in energy consumption. Besides developing renewable sources of energy, the management of the power we consume through more efficient systems is crucial for our future. The creation of a new generation of ACDC converters forms part of ST’s extensive program for creating devices that reduce power consumption and increase efficiency.
Essential in powering the majority of equipment plugged into the mains, ST’s new converters overperform the most demanding energy saving regulations such as Code of Conduct, Top-Runner, Energy Star, Energy 2000, 85+, 92+ and EPA4.

When every milliwatt counts


It has been estimated that ST’s innovative solutions saved around 1250 GW hours in 2006, and 20% more in 2007; equivalent to 3 thermoelectric power stations. Other derivative benefits are:
Power supply weight and dimensions: 20% less
Use of difficult-to-recycle materials and chemicals: 15% less
Around 10% less heat generated and temperature on critical power components reduced as much as 30% Cost of ownership lowered and lifetime of the equipment prolonged by 20 to 25%

New SMPS solutions for LCD/PDP TVs


An example of one of ST’s architectural solutions developed to markedly improve energy management in LCD TVs is composed of a front-end PFC, implementing the state-of-the-art L6563 and a resonant DC-DC converter based on the advanced L6599 controller for LCD/PDP TVs. This solution enables:
Universal input mains range
    90 to 264 Vac
    45 to 65 Hz
Output voltage
    200 W: 12 V / 5 A, 24 V / 6 A, 3.3 V / 5 V
    400 W: 200 V/ 2 A, 3.3V / 5 V
Standby mains consumption
    0.4 W @ 230 Vac (typ)
    0.5 W @ 265 Vac (max)
Mains harmonics according to EN61000-3-2
Overall efficiency greater than 88 %
EMI - meets EN50022-Class B
Safety -meets EN60950

Dedicated evaluation boards

Evaluation Board
Device
Description
L6599
L6563
VIPer22A
Wide range 200 W L6599-based
HB LLC resonant converter for LCD
TV and flat panels
L6599
L6563
VIPer12A
Wide range 400 W L6599-based
HB LLC resonant converter for PDP
application

Energy saving AC-DC converters
Equipment power conversion efficiency evolution

Products for new generation AC-DC converters

Part number
Package
Description
DIP-16 and SO-16N
High-voltage enriched resonant controller
SO-16N
Multimode primary controller
SO-14N
Advanced TM power factor corrector
SOT-23-6L, SO-8
Constant-voltage and constant-current controller for battery chargers and adapters
SO-8 and DIP-8
Low-power off-line SMPS primary switcher

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