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TNY263
(Rev.:2016)

TinySwitch-II Family Enhanced, Energy Efficient, Low Power Off-line Switcher

Power Integrations, Inc 

This product is not recommended for new designs.

TNY263-268

TinySwitch-II Family

Enhanced, Energy Efficient, Low Power

Off-line Switcher

Product Highlights

TinySwitch-II Features Reduce System Cost

• Fully integrated auto-restart for short circuit and open loop fault

protection – saves external component costs

• Built-in circuitry practically eliminates audible noise with ordinary

dip-varnished transformer

• Programmable line undervoltage detect feature prevents power

on/off glitches – saves external components

• Frequency jittering dramatically reduces EMI (~10 dB)

– minimizes EMI filter component costs

• 132 kHz operation reduces transformer size – allows use of

EF12.6 or EE13 cores for low cost and small size

• Very tight tolerances and negligible temperature variation on key

parameters eases design and lowers cost

• Lowest component count switcher solution

• Expanded scalable device family for low system cost

Better Cost/Performance over RCC & Linears

• Lower system cost than RCC, discrete PWM and other

integrated/hybrid solutions

• Cost effective replacement for bulky regulated linears

• Simple ON/OFF control – no loop compensation needed

• No bias winding – simpler, lower cost transformer

• Simple design practically eliminates rework in manufacturing

EcoSmart™– Extremely Energy Efficient

• No load consumption <50 mW with bias winding and

<250 mW without bias winding at 265 VAC input

• Meets California Energy Commission (CEC), Energy Star, and

EU requirements

• Ideal for cell-phone charger and PC standby applications

High Performance at Low Cost

• High voltage powered – ideal for charger applications

• High bandwidth provides fast turn on with no overshoot

• Current limit operation rejects line frequency ripple

• Built-in current limit and thermal protection improves safety

Description

TinySwitch™-II integrates a 700 V power MOSFET, oscillator,

high voltage switched current source, current limit and thermal

shutdown circuitry onto a monolithic device. The start-up and

operating power are derived directly from the voltage on the

DRAIN pin, eliminating the need for a bias winding and associated

circuitry. In addition, the TinySwitch-II devices incorporate

auto-restart, line undervoltage sense, and frequency jittering. An

innovative design minimizes audio frequency components in the

simple ON/OFF control scheme to practically eliminate audible

noise with standard taped/varnished transformer construction.

+

Optional

UV Resistor

Wide-Range

High-Voltage

DC Input

D

TinySwitch-II

EN/UV

BP

S

-

Figure 1. Typical Standby Application.

+

DC

Output

-

PI-2684-061815

Output Power Table

Product3

230 VAC ± 15%

Adapter1

Open

Frame2

TNY263 P/G

5W

7.5 W

TNY264 P/G

5.5 W

9W

TNY265 P/G

8.5 W

11 W

TNY266 P/G

10 W

15 W

TNY267 P/G

13 W

19 W

TNY268 P/G

16 W

23 W

85-265 VAC

Adapter1

Open

Frame2

3.7 W

4.7 W

4W

6W

5.5 W

7.5 W

6W

9.5 W

8W

12 W

10 W

15 W

Table 1. Output Power Table.

Notes:

1. Minimum continuous power in a typical non-ventilated enclosed adapter

measured at 50 °C ambient.

2. Minimum practical continuous power in an open frame design with adequate

heat sinking, measured at 50 °C ambient (See Key Applications

Considerations).

3. Packages: P: DIP-8B, G: SMD-8B. Please see Part Ordering Information.

The fully integrated auto-restart circuit safely limits output power

during fault conditions such as output short circuit or open loop,

reducing component count and secondary feedback circuitry

cost. An optional line sense resistor externally programs a line

undervoltage threshold, which eliminates power down glitches

caused by the slow discharge of input storage capacitors present

in applications such as standby supplies. The operating

frequency of 132 kHz is jittered to significantly reduce both the

quasi-peak and average EMI, minimizing filtering cost.

www.power.com

This Product is Covered by Patents and/or Pending Patent Applications.

August 2016

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