EPR-12 Datasheet, PDF (6/40 Pages) Power Integrations, Inc. – Engineering Prototype Report for EP-12 - 145 W PC Forward Converter with TOP247 and 10 W 5 V Output Standby Flyback with TNY266

EPR-12 – PC Forward Converter with Standby Flyback Power Supply
01-Feb-05
2.2 Conditions for Cross Regulation Test
Load
1
2
3
4
5
6
7
8
+5 V
11 A
15 A
2A
0.4 A
5A
15 A
12 A
0A
+3.3 V
12 A
7A
2A
0.5 A
3A
7A
12 A
0A
+12 V
3A
3A
3A
0.05 A
1A
3A
5 A (15 s)
0A
2.3 Output Characteristics
a. Rise time: all outputs of the power supply must rise from 10% to 90% of their rated
output voltages within 2 ms to 20 ms at nominal line, maximum load.
b. Turn-on delay time: 1000 ms maximum at nominal line, full load.
c. Hold-up time: 16 ms minimum for all outputs at 110 VAC, 60 Hz, and full load.
2.4 Transient Overshoot
a. +5 V, +12 V and +3.3 V dynamic load transient response. Transient response is
measured by switching the output load from 80% to 100% to 80% of its maximum
load, other outputs are under maximum load with an input voltage from 90 VRMS to
132 VRMS and at a frequency of 100 Hz and 50% duty cycle, step load change is
0.5 A/µs. The peak transient amplitude is less than or equal to +5% / -5% of +5 V,
+12 V, +3.3 V output. The recovery time is less than 5 ms.
b. Overshoot: +5 V: 5.5 V maximum
+3.3 V: 3.63 V maximum
2.5 Short Circuit Protection
The main supply shall latch off from a shorted output condition. The latch is reset through
toggling remote ON/OFF.
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