TNY274G POWERINT [Power Integrations, Inc.], TNY274G Datasheet - Page 12

• Manufacturer Part Number: TNY274G
• Description: Energy Efficient, Off-Line Switcher with Enhanced Flexibility and Extended Power Range
• Manufacturer: POWERINT [Power Integrations, Inc.]

Quick Design Checklist
As with any power supply design, all TinySwitch-III 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 V
2. Maximum drain current – At maximum ambient temperature,
12
650 V at highest input voltage and peak (overload) output
power. The 50 V margin to the 700 V BV
gives margin for design variation.
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
TNY274-280
E
2/06
DS
does not exceed
DSS
specification
3. Thermal Check – At specified maximum output power,
startup. Repeat under steady state conditions and verify that
the leading edge current spike event is below I
end of the t
current should be below the specified absolute maximum
ratings.
minimum input voltage and maximum ambient temperature,
verify that the temperature specifications are not exceeded
for TinySwitch-III, transformer, output diode, and output
capacitors. Enough thermal margin should be allowed for
part-to-part variation of the R
specified in the data sheet. Under low line, maximum power,
a maximum TinySwitch-III SOURCE pin temperature of
110 °C is recommended to allow for these variations.
LEB(Min)
. Under all conditions, the maximum drain
DS(ON)
of TinySwitch-III as
LIMIT(Min)
at the