EPR-000014 Datasheet, PDF (12/28 Pages) Power Integrations, Inc. – Engineering Prototype Report - 3 W Universal Input TinySwitch-II TNY264 Power Supply

EPR-000014 – 9 V, 0.33 A, 3 W TNY264 Adapter
22-Feb-2002
8.4 Output Overload
The following curve shows results with the output overload, at room ambient. Output
load was adjusted to obtain maximum continuous output current while varying the AC
line input. The power supply will operate in auto-restart mode when maximum output
current is exceeded. A reduction in maximum output current and input power can be
expected as operating temperature is increased.
Maximum Output Current vs AC Input
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
85
12
10
8
6
IOUT max
4
PIN
2
120
200
230
VAC Input
0
265
Figure 7. Maximum Output Current vs Line Voltage
8.5 Thermal Performance
Thermal data was collected at room temperature and raised ambient with natural
convection, no power supply enclosure, and at a full load of 3 W with the AC line varied.
All temperatures were recorded with T-type thermocouples and represent the
temperature rise over power supply external ambient, in degrees Celsius (+°C).
• Transformer measured on core, outer leg (glued between core leg and output
windings)
• TNY264P soldered to Source lead (pin 2)
• All other thermocouples glued to component body
• Local power supply ambient air temperature was monitored
• The following data represents worst-case dissipation, operating at 132 kHz mode(s)
Power Integrations, Inc.
Tel: [phone] Fax: [phone]
www.powerint.com
Page 12 of 28