How can I design a high-output power inverter for low input voltage?

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Discussion Overview

The discussion centers around designing a high-output power inverter that operates with a low input voltage range of 0.1 to 0.3 volts. Participants explore various approaches, components, and considerations for achieving high output voltage or current, depending on the intended application.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant seeks clarification on whether "high output" refers to voltage or current, and requests more specific details about the desired output levels and application.
  • Another participant suggests the "joule thief" as a potential solution but expresses uncertainty about its effectiveness at very low input voltages.
  • A different participant notes that significant power conversion will result in high current, recommending the use of MOSFETs designed for synchronous rectification and a specialized transformer with a copper strap primary as likely effective components.
  • It is mentioned that some converters, like the NCP1400 series, can operate down to 0.3 volts if their output is initially raised to a couple of volts.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on the best approach or components for the inverter design, with multiple competing views and suggestions remaining in the discussion.

Contextual Notes

Participants express varying levels of specificity regarding the desired output characteristics and applications, which may affect the feasibility of proposed solutions. There is also uncertainty about the performance of suggested components at the specified low input voltages.

tommycaiden
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Hey guys, I need to make a power inverter that will take in .1-.3 volts, and the output needs to be as high as possible.
 
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tommycaiden said:
and the output needs to be as high as possible.
Is that the output voltage or current you'd like to allow be as high as possible? If output voltage, what do you consider acceptably high, and at how many milliamps? What is the application you have in mind?

You really do need to be less vague in framing requests for advice here, to encourage those who may be able to help you. You'll discover that mind-reading is not everyone's specialty. :wink:
 
best I know of the the joule thief (search for it). Not sure how low it actually goes though.
 
If you're converting any significant amount of power, you'll have a lot of current. MOSFETs designed for synchornous rectification and a highly specialized transformer with a copper strap primary are probably the best bet.
I don't think there's anything like that off the shelf.
Some converters, like the NCP1400 series, will operate down to .3 volts if you raise their output to a couple of volts first.
 

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