Will a boost buck regulator like the ti8100 work with a single 3.7v battery or is it necessary to use more than one cell to supply the IC with a higher voltage?
Boost Buck Regulator Question
- Thread starter ManicMaurice
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That board will not work with a single cell. The input must be higher than the output. You want this board Plug-in Power Module - Non-Isolated POL - PTN04050C - TI.com that can use a single cell. See breakthru's thread for a schematic to make it variable voltage.
The Ti PTR08100w is not a boost /buck regulator. It is considered a Buck regulator and has no boost capability. Ti does have boost/bucks but not in the module form like the 08100. So they are not as simple as just adding a couple caps and a pot.
The PTN04050C that sci pointed out is considered a Boost regulator. It is also in the module form so it is pretty simple to set up. People have got it to go lower then 5 volts by using blocking diodes that have a forward voltage drop. Not a very efficient , but it does get the job done.
The PTN04050C that sci pointed out is considered a Boost regulator. It is also in the module form so it is pretty simple to set up. People have got it to go lower then 5 volts by using blocking diodes that have a forward voltage drop. Not a very efficient , but it does get the job done.
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You can get it to go below 5v by putting the resistor between the adj and Vout instead of between the adj and gnd. 100k to 62k is about the limit this way. I use 82k for a fixed 4.4 to 4.5v (BTW no inline diode needed for this)
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The Ti ptr08100w would do that but you need two batteries in series to power it. You can trick the PTN04050C down that far with a combination resistor and diode . Or you can get a IC that is buck and boost. As far as my searches have went i have not found on in the module format that can handle the kind of amps we require for vaping. What i mean by module is that if you take a look at a 8100 it has a ic , capacitors , resistors , mosfets and inductor on a small circuit board. So it is pretty much ready to go with a few external parts. Here is a buck boost that is 3 amp http://cds.linear.com/docs/Datasheet/3113f.pdf if you look at the sample circuit your going to have to add caps, resistors and a inductor for it to work. You would have to make your own circuit board to slap it all on using a strip board i dont think would be feasible. You also run into most of these chips come in pin packages that require a hot air rework process to solder them on.
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