PWM - Frequency

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Rickajho

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Apr 23, 2011
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Hi all,

I need an output of 4 volts from an IMR 4.2V battery so I'm looking for a chip, mod or board that has accurate pulse-width modulation. Was thinking of using a VV Gripper but if I can just buy the actual modulator the better.

Any ideas welcome please.

Not sure what you are asking for. Do you need a board that can produce 4 volts period or do you want a board that only does it via PWM for some reason?
 

DrMA

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Jan 26, 2013
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I have an IMR 4.2V battery, I want to output a consistent 4V, ideally via PWM as I've read this is the most efficient.

Is this for a custom mod, or another application not related to vaping?

In any case, what you're looking for is a buck/boost DC/DC converter, because your battery will start at 4.2V when fully charged which will need to be lowered to your desired 4V output; however, as the battery gets drained its voltage will drop towards its nominal value of 3.7V, in which case you'll need to boost the output to 4V. For vaping, there are several pre-built modules that will do that such as the DNA30, SX350, ZMax... For non-vaping applications, search mouser or digikey for buck/boost converters matching your desired specs.
 

FINNIX

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Aug 17, 2013
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Is this for a custom mod, or another application not related to vaping?

In any case, what you're looking for is a buck/boost DC/DC converter, because your battery will start at 4.2V when fully charged which will need to be lowered to your desired 4V output; however, as the battery gets drained its voltage will drop towards its nominal value of 3.7V, in which case you'll need to boost the output to 4V. For vaping, there are several pre-built modules that will do that such as the DNA30, SX350, ZMax... For non-vaping applications, search mouser or digikey for buck/boost converters matching your desired specs.

Thanks, I'm assuming a buck uses PWM? Also are such chips amp limited?
 
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