We are designing a boost convertor using MP3422 chip. The input voltage range from 2.4-4.2V and the output voltage is 5V fixed. We are facing issue of low efficiency of boost. Here are some data we have calculated:
*For 0.3A output current and 2.61V input voltage, the input current is 0.71A. The efficiency is 81%
*For 0.3A output current and 4.15V input voltage, the input current is 0.41A. The efficiency is 89%.
*For 0.6A output current and 2.43V input voltage, the input current is 1.55A. The efficiency is 75%.
The expected efficiency is more than 90% from the datasheet. We have designed the same circuit as mentioned in the datasheet(https://pdf1.alldatasheet.com/datasheet-pdf/view/1036198/MPS/MP3422.html). Any suggestions on how we can improve it or the boost are only that efficient?
*For 0.3A output current and 2.61V input voltage, the input current is 0.71A. The efficiency is 81%
*For 0.3A output current and 4.15V input voltage, the input current is 0.41A. The efficiency is 89%.
*For 0.6A output current and 2.43V input voltage, the input current is 1.55A. The efficiency is 75%.
The expected efficiency is more than 90% from the datasheet. We have designed the same circuit as mentioned in the datasheet(https://pdf1.alldatasheet.com/datasheet-pdf/view/1036198/MPS/MP3422.html). Any suggestions on how we can improve it or the boost are only that efficient?
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