TinySwitch-III

Energy-Efficient Off-Line Switcher with Enhanced Flexibility and Extended Power Range

Typical Standby Application

Data Sheets

TinySwitch-III Data Sheet

Energy-Efficient Off-Line Switcher with Enhanced Flexibility and Extended Power Range

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TinySwitch™-III incorporates a 700 V power MOSFET, oscillator, high-voltage switched current source, current limit (user selectable) and thermal shutdown circuitry. The IC family uses an ON/OFF control scheme and offers a design flexible solution with a low system cost and extended power capability.

Product Highlights:

Simple ON/OFF control, no loop compensation needed
Selectable current limit through BP/M capacitor value
Higher current limit extends peak power or, in open frame applications, maximum continuous power
Tight I²f parameter tolerance reduces system cost; minimizes maximum overload power, reducing cost of transformer, primary clamp & secondary components
On-time extension—extends low line regulation range/hold-up time to reduce input bulk capacitance
Frequency jittering reduces EMI filter costs

Applications

Power Table

Output Power (Watts)
PRODUCT¹	230 VAC ±15%		85-265 VAC
PRODUCT¹	Adapter²	Open Frame³ (or Peak)	Adapter²	Open Frame³ (or Peak)
TNY274P TNY274G	6	11	5	8.5
TNY275P TNY275G	8.5	15	6	11.5
TNY276P TNY276G	10	19	7	15
TNY277P TNY277G	13	23.5	8	18
TNY278P TNY278G	16	28	10	21.5
TNY279P TNY279G	18	32	12	25
TNY280P TNY280G	20	36.5	14	28.5

Notes:

Packages: P: DIP-8C, G: SMD-8C. See the Part Ordering Information section of the TinySwitch-III Data Sheet for details.
Minimum continuous power in a typical nonventilated enclosed adapter measured at 50 °C ambient. Use of an external heatsink will increase power capability.
Minimum peak power capability in any design or minimum continuous power in an open frame design (see the Key Application Considerations section of the TinySwitch-III Data Sheet for details).