TNY263PG View Datasheet(PDF) - Power Integrations, Inc

Part Name

Description

Manufacturer

TNY263PG

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

Power Integrations, Inc 

TNY263-268

Key Application Considerations

TinySwitch-II vs. TinySwitch

Table 2 compares the features and performance differences

between the TNY254 device of the TinySwitch-II family with

the TinySwitch-II family of devices. Many of the new features

eliminate the need for or reduce the cost of circuit components.

Other features simplify the design and enhance performance.

Design

Output Power

Table 1 (front page) shows the practical continuous output

power levels that can be obtained under the following

conditions:

1. The minimum DC input voltage is 90 V or higher for

85 VAC input, or 240 V or higher for 230 VAC input or

115 VAC input with a voltage doubler. This corresponds to

a filter capacitor of 3 μF/W for universal input and 1 μF/W

for 230 VAC or 115 VAC with doubler input.

2. A secondary output of 5 V with a Schottky rectifier diode.

3. Assumed efficiency of 77% (TNY267 & TNY268), 75%

(TNY265 & TNY266) and 73% (TNY263 & TNY264).

4. The parts are board mounted with SOURCE pins soldered

to sufficient area of copper to keep the die temperature at

or below 100 °C.

In addition to the thermal environment (sealed enclosure,

ventilated, open frame, etc.), the maximum power capability of

TinySwitch-II in a given application depends on transformer

TinySwitch-II vs. TinySwitch

Function

TinySwitch

TNY254

Switching Frequency and

Tolerance

Temperature Variation

(0-100 °C)**

44 kHz ±10% (at 25 °C)

+8%

Active Frequency Jitter

N/A*

Transformer Audible Noise

Reduction

N/A*

Line UV Detect

N/A*

Current Limit Tolerance

Temperature Variation

(0-100 °C)**

Auto-Restart

±11% (at 25 °C)

-8%

N/A*

BYPASS Pin Zener Clamp

N/A*

DRAIN Creepage at Package 0.037 in. / 0.94 mm

*Not available.

** See typical performance curves.

Table 2. Comparison Between TinySwitch and TinySwitch-II.

TinySwitch-II

TNY263-268

132 kHz ±6% (at 25 °C)

+2%)

TinySwitch-II

Advantages

• Smaller transformer for low cost

• Ease of design

• Manufacturability

• Optimum design for lower cost

±4 kHz

• Lower EMI minimizing filter

component costs

Yes–built into controller

• Practically eliminates audible noise with ordinary dip

varnished transformer – no special

construction or gluing required

Single resistor

programmable

• Prevents power on/off glitches

±7% (at 25 °C)

0%)

6% effective on-time

• Increases power capability and

simplifies design for high volume

manufacturing

• Limits output short-circuit current to less than full

load current

• No output diode size penalty

• Protects load in open loop fault conditions

• No additional components required

Internally clamped to 6.3 V

• Allows TinySwitch-II to be powered from a low

voltage bias winding to improve efficiency and to

reduce on-chip power dissipation

0.137 in. / 3.48 mm

• Greater immunity to arcing as a result of dust,

debris or other contaminants build-up

10

Rev. H 02/09

www.powerint.com

Share Link: