Diodes AP3917B, Руководство пользователя, Страница: 14 / 17

Dual Output Off-Line Non-isolated Flyback Power Solution
AP3917B 12V/20mA+3.8V20mA EV3 Board User
’s Guide
AP3917B EV3 Page 14 of 17 06-21-2019
Rev 1.0 www.diodes.com
Fig. 5-21, SCP @12V output short and 3.8V full load, 85V/60Hz Fig. 5-22, SCP @12V output short and 3.8V full load, 265V/50Hz
Fig. 5-23, SCP@12V output short and 3.8V full load, 85V/60Hz Fig. 5-24, SCP@12V output short and 3.8V full load, 265V/50Hz
5.4 Thermal Test
The thermal test was under room temperature after burning 1 hour. The board has no case, and using thermal imager to observe
the surface temperature of IC.
Fig. 5-25, IC 32.1
℃
, 12V flyback diode 31.9
℃
, RCD diode
33.1
℃
@full load, 85V/60Hz, ambient temperature 26.9
℃
.
Fig. 5-26, Transformer 33.3
℃
, 3.8V flyback diode 31.7
℃
@full
load, 264V/50Hz, ambient temperature 25.8
℃
.