We have a MP24833A design with 51 volt input, 68 uH inductor and a 200 mA load, and a 100nf boost capacitor
we are unable to get more than 46 volts out. Any ideas how to get closer to 48 volts?
Murray
Hello Murray,
The maximum duty cycle is 91%.
Thank you,
Vinh Tran
Field Applications Engineer
Unload it, in DCM the output voltage can go higher. You need to pick another chip.
yeah - the 91% explains it well. Actually - if the minimum is 85% - then this really is the wrong part! 85 to 97 is a huge range.
Hi Murray:
Yes you have to assume some parts in a production lot can have 85% Maximum duty cycle. If you Vin is 51V and Vout is 46V then the MP24833A is not the right part.