Energy Efficient, Low Power Off-line Switchers

The TinySwitch family TNY253 TNY254/TNY255 uses a breakthrough design to provide the lowest cost, high efficiency, off-line switcher solution in the 0 to 10 W range. These devices integrate a 700 V power MOSFET Oscillator high voltage switched current source, current limit and thermal shutdown circuitry. They start-up and run on power derived from the DRAIN voltage, eliminating the need for a transformer bias winding and the associated circuitry. And yet, they consume only about 80 mW at no load, from 265 VAC input. A simple ON/OFF control scheme also eliminates the need for loop compensation. The TNY253 and TNY254 Switch at 44 kHz to minimize EMI and to allow a simple snubber clamp to limit DRAIN spike voltage. At the same time, they allow use of low cost EE16 core transformers to deliver up to 5 W. The TNY253 is identical to TNY254 except for its lower current limit, which reduces output short circuit current for applications under 2.5 W. TNY255 uses higher switching rate of 130 kHz to deliver up to 10 W from the same low cost EE16 core for applications such as PC standby supply. An EE13 or EF13 core with safety spaced bobbin CAN be used for applications under 2.5 W. Absence of a bias winding eliminates the need for taping/ margins in most applications, when triple insulated wire is used for the secondary. This simplifies the transformer construction and reduces cost. By Power Integrations, Inc.
TNY253 's PackagesTNY253 's pdf datasheet

TNY253 Pinout, Pinouts
TNY253 pinout,Pin out
This is one package pinout of TNY253,If you need more pinouts please download TNY253's pdf datasheet.

TNY253 Application circuits
TNY253 circuits
This is one application circuit of TNY253,If you need more circuits,please download TNY253's pdf datasheet.

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