TNY288KG View Datasheet(PDF) - Power Integrations, Inc

Part Name

Description

Manufacturer

TNY288KG

Energy-Effcient, Off-Line Switcher With Line Compensated Overload Power

Power Integrations, Inc 

TNY284-290

Quick Design Checklist

As with any power supply design, all TinySwitch-4 designs

should be verified on the bench to make sure that component

specifications are not exceeded under worst case conditions.

The following minimum set of tests is strongly recommended:

1. Maximum drain voltage – Verify that VDS does not exceed

675 V at highest input voltage and peak (overload) output

power. The 50 V margin to the 725 V BVDSS specification

gives margin for design variation.

2. Maximum drain current – At maximum ambient temperature,

maximum input voltage and peak output (overload) power,

verify drain current waveforms for any signs of transformer

saturation and excessive leading edge current spikes at

start-up. Repeat under steady-state conditions and verify

that the leading edge current spike event is below ILIMIT(MIN) at

the end of the t . LEB(MIN) Under all conditions, the maximum

drain current should be below the specified absolute

maximum ratings.

3. Thermal Check – At specified maximum output power,

minimum input voltage and maximum ambient temperature,

verify that the temperature specifications are not exceeded

for TinySwitch-4, transformer, output diode, and output

capacitors. Enough thermal margin should be allowed for

part-to-part variation of the RDS(ON) of TinySwitch-4 as

specified in the data sheet. Under low-line, maximum

power, a maximum TinySwitch-4 SOURCE pin temperature

of 110 °C is recommended to allow for these variations.

12

Rev. A 09/12

www.powerint.com

Share Link: