HOME > News Release > 2011 > Sanken Develops a New Switching Power Supply ICs, Realizing Industry's Best No-Load Power Consumption of 10 mW STR3A100 Series Ideal for lowering standby power consumption of TVs and air conditioners

2011

Sanken Develops a New Switching Power Supply ICs, Realizing Industry's Best No-Load Power Consumption of 10 mW
STR3A100 Series
Ideal for lowering standby power consumption of TVs and air conditioners

July 6, 2011
STR3A100 Series

Sanken today announced the development of new switching power supply ICs, STR3A100 series, featuring the industry's top-class power consumption of only 10 mW at no load. Samples will be available in August 2011, priced at JPY 450 each.

Volume production will begin in October 2011, starting at one million units per month, ramping up to 4 million units per month by April 2012.

1. Development background and product overview

Today's home appliances and office machines require efficient operations, consuming less power than ever before. Various countries set regulatory standards on not only operating power efficiency but also on standby power consumptions (*1). Consumers' environmental awareness is also increasing, prompting appliance and office equipment manufacturers to develop products that meet standby power requirement standards.

*1. Such as the U.S. ENERGY STAR label requirements (for products that consume 1.0 W or less) and the European Union's Ecodesign initiatives (applicable to products that consume 1.0 W or less: to be lowered to 0.5 W or less in 2012)

To lower equipment's standby power consumption levels, a switching power supply IC that features lower power consumption at no load is required.

Up to now, Sanken's lineup of switching power supply ICs featured no-load power consumption of as low as 25 mW. With improved internal circuitries, STR3A100 series has attained no-load power consumption of 10 mW, a 60% reduction.

STR3A100 series come in a new, heat-resistant DIP8 package. Previous switching power supply ICs in a DIP8 package were limited in output power to about 20W. Thus, any equipment, such as small televisions, Blu-ray disc players, air conditioners, and other, whose output power exceeded the 20 W limit, would require TO220F package with attached heat sink.

STR3A100's new heat-resistant DIP8 package enables maximum output power of 40 W, nearly doubling the capability of earlier DIP8 packages. STR3A100's DIP8 may replace TO220F and significantly reduce the size of the equipment's power block.

Pin layout has also been redesigned. The distance between the high and low-voltage pins is extended from 5.08 mm to 7.6 mm, eliminating the need for time-consuming application of isolation resin between the pins. Thus, STR3A100 series are ideal for air conditioners with strict isolation requirements between the high and low-voltage pins that are placed close together.

2. Features

  1. Improved internal circuits achieved significant reduction in no-load power consumption to 10 mW.
  2. New, heat-resistant DIP8 package (resin dimensions: 9.4 x 6.5 x 3.4 mm) offer higher output power to 40 W
  3. Improved pin layout extended distance between high and low-voltage pins from 5.08 mm to 7.6 mm
  4. Random switching function reduces EMI noise
  5. Guaranteed avalanche energy tolerance simplifies the design of snubber circuit,using a 2-chip structure
  6. Overvoltage protection and overheating protection functions

3. Applications

Secondary and standby power supplies for FPD TVs and audio amplifiers, power supply for Blu-ray Disc players, CD players, and small televisions, auxiliary power supply for air conditioner units, AC adapter for mobile phones and game devices, etc.

4. Lineup

Product Name MOS FET Pout
VDSS (V) RDS (ON) (Ω) 230 V/85 to 264 V
STR3A151 650 4.0 16 W/12 W
STR3A152 650 3.0 23 W/20 W
STR3A153 650 1.9 36 W/30 W
STR3A154 650 1.4 40 W/33 W
STR3A155 650 1.1 43 W/35 W
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