TNY263-268 Ver la hoja de datos (PDF) - Power Integrations, Inc

Número de pieza

componentes Descripción

Fabricante

TNY263-268

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 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.

Function

Switching Frequency

and Tolerance

Temperature Variation

(0-100 °C)**

Active Frequency Jitter

Transformer Audible

Noise Reduction

Line UV Detect

Current Limit Tolerance

Temperature Variation

(0-100 °C)**

Auto-Restart

BYPASS Pin Zener

Clamp

DRAIN Creepage at

Package

TinySwitch

TNY254

44 kHz ±10% (at 25 °C)

+8%

N/A*

N/A*

N/A*

±11% (at 25 °C)

-8%

N/A*

N/A*

0.037 in. / 0.94 mm

TinySwitch-II

TNY263-268

132 kHz ±6% (at 25 °C)

+2%

±4 kHz

Yes–built into controller

Single resistor

programmable

±7% (at 25 °C)

0%

6% effective on-time

Internally clamped to

6.3 V

0.137 in. / 3.48 mm

TinySwitch-II

Advantages

• Smaller transformer for low cost

• Ease of design

• Manufacturability

• Optimum design for lower cost

• Lower EMI minimizing filter

component costs

• Practically eliminates audible

noise with ordinary dip varnished

transformer – no special

construction or gluing required

• Prevents power on/off glitches

• 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

• Allows TinySwitch-II to be

powered from a low voltage bias

winding to improve efficiency and

to reduce on-chip power

dissipation

• Greater immunity to arcing as a

result of dust, debris or other

contaminants build-up

*Not available. ** See typical performance curves.

Table 2. Comparison Between TinySwitch and TinySwitch-II.

10 G

4/05

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