I am looking for information/circuit examples about boost conversion.
I want to be able to boost 5v from USB all the way up to 25v in small steps and have it s/w controlled by an MCU. What is the best/simplest way to implement this ?
-- Always boost to 25v and then regulate it down with a DAC controlled transistor ?
-- Control the boost circuit somehow by outputting different frequency from the MCU?
-- Other ways of achieving same goal ?
I would also like to know how to use the ADC to measure current to implement a shut off if a certain current level is exceeded. Would I do that by measure voltage drop over a shunt ?
I am working an an universal device programmer and this is the part I am getting stuck at generating the VPP
Boost conversion
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- zener
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Re: Boost conversion
Yes, with a MAX629 or similar-- Always boost to 25v and then regulate it down
Something like thatwith a DAC controlled transistor
You could, but that is probably a lot more difficult-- Control the boost circuit somehow by outputting different frequency from the MCU?
I am sure there are many!-- Other ways of achieving same goal ?
You could, high-side shunt, low-side shunt. You could also look for the voltage dropping out.Would I do that by measure voltage drop over a shunt ?
-
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Re: Boost conversion
Thanks a lot for pointing me in the direction of the max629, have ordered a few for testing.
Carl
Carl
- adafruit_support_bill
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Re: Boost conversion
You can also look at the design page of the Ice Tube clock. That has a boost-converter circuit to drive the VFD display.
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