OB2361,输出5V/3A,如何提高效率。谢谢!
90~264VAC,5V/3A
开关管4N60,整流MBR2045。
初级90匝线径0.3mm,电感量1.2mH。次级9匝线径0.45mm*2。反馈19匝线径0.25mm。EE22
测试结果:
110VAC,60HZ: | ||||
空载5.182V. | ||||
负载 | 输出 | 输入功率 | 效率 | |
25% | 5.087V/0.75A | 4.66W | 81.87% | |
50% | 4.993V/1.5A | 9.21W | 81.32% | |
75% | 4.900V/2.25A | 14W | 78.75% | |
100% | 4.806V/3A | 18.88W | 76.36% | |
平均效率79.58% | ||||
220VAC,50HZ: | ||||
空载5.182V. | ||||
25% | 5.087V/0.75A | 4.79W | 79.65% | |
50% | 4.993V/1.5A | 9.35W | 80.10% | |
75% | 4.903V/2.25A | 13.91W | 79.30% | |
100% | 4.811V/3A | 18.64W | 77.43% | |
平均效率79.12%
带DC线,18AWG,1.5米。板上输出效率81.3%。
整流管电应力Vp-p 65V,所以换成MBR20100,结果效率没有余量。
请帮忙!
欢迎赐教宝贵意见!
谢谢!
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