TNY255G datasheet, PDF - EEWORLD Datasheet

TNY255G: Descriptiontinyswitch family energy efficient, low power off-line switchers; File Size495KB，20 Pages; ManufacturerPower Innovations Limited; Websitehttp://www.power-innovations.com

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TNY255G Overview

tinyswitch family energy efficient, low power off-line switchers

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TNY253/254/255

TinySwitch

Family

Energy Efficient, Low Power Off-line Switchers

Product Highlights

Lowest Cost, Low Power Switcher Solution

• Lower cost than RCC, discrete PWM and other

integrated/hybrid solutions

• Cost effective replacement for bulky linear adapters

• Lowest component count

• Simple ON/OFF control – no loop compensation devices

• No bias winding – simpler, lower cost transformer

• Allows simple RC type EMI filter for up to 2 W from

universal input or 4 W from 115 VAC input

Extremely Energy Efficient

• Consumes only 30/60 mW at 115/230 VAC with no load

• Meets Blue Angel, Energy Star, Energy 2000 and

200mW European cell phone requirements for standby

• Saves $1 to $4 per year in energy costs (at $0.12/kWHr)

compared to bulky linear adapters

• Ideal for cellular phone chargers, standby power supplies

for PC, TV and VCR, utility meters, and cordless phones.

High Performance at Low Cost

• High voltage powered – ideal for charger applications

• Very high loop bandwidth provides excellent transient

response and fast turn on with practically no overshoot

• Current limit operation rejects line frequency ripple

• Glitch free output when input is removed

• Built-in current limit and thermal protection

• 44 kHz operation (TNY253/4) with snubber clamp

reduces EMI and video noise in TVs & VCRs

• Operates with optocoupler or bias winding feedback

DC Output

–

Wide-Range

HV DC Input

TinySwitch

–

PI-2178-022699

Figure 1. Typical Standby Application.

TinySwitch

SELECTION GUIDE

ORDER

PART

NUMBER

TNY253P

TNY253G

TNY254P

TNY254G

TNY255P

TNY255G

Recommended Range

for Lowest System Cost*

PACKAGE

230 VAC or

115 VAC

w/Doubler

85-265

VAC

DIP-8

SMD-8

DIP-8

SMD-8

DIP-8

SMD-8

0-4 W

0-2 W

2-5 W

4-10 W

1-4 W

3.5-6.5 W

Description

The

TinySwitch

family 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

265VAC 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

Table 1. *Please refer to the Key Application Considerations section

for details.

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 2.5W.

TNY255 uses higher switching rate of 130kHz 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 2.5W.

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.

July 2001

TNY255G Related Products

	TNY255G	TNY253	TNY255	TNY254	TNY255P	TNY254P	TNY254G	TNY253P	TNY253G
Description	tinyswitch family energy efficient, low power off-line switchers	tinyswitch family energy efficient, low power off-line switchers	tinyswitch family energy efficient, low power off-line switchers	tinyswitch family energy efficient, low power off-line switchers	tinyswitch family energy efficient, low power off-line switchers	tinyswitch family energy efficient, low power off-line switchers	tinyswitch family energy efficient, low power off-line switchers	tinyswitch family energy efficient, low power off-line switchers	tinyswitch family energy efficient, low power off-line switchers

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