I looked around to find a way to use a 3.7v battery to power a 5v PV without stacking them and using a voltage regulator. I have come across a SMPS switch allowing me to use a 3.7v batt. and boost it up to 5v, but I have come up short on where to acquire this switch any help would be great.
3.7v boost to 5v output
- Thread starter Slim_TheHippie
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A few people have been using these for a while now. They're pricey, but they get the job done. If you're not in a hurry, the guy who runs madvapes is meeting with an electrical engineer to design a cheaper booster board for us modders. No ETA yet, but I'm looking forward to it.
Excellent. I just found this DC DC Converter www electroniccity com/shopping/pricelist.asp?prid=1133, its adjustable and that could be very useful
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Remember that you don't get nothin for free.
The power to get 5 volts using a booster still comes from the 3.7 volt battery.
It's a pretty good idea, but not free.
Example:
If you use a 2.5 ohm atty on 3.7 volts, it will draw about 1.48 amps;
use the same atty on 5.0 volts and it will draw 2 amps;
use a booster to make the 5 volts from 3.7 volts at 85% efficiency;
and you will need 2.3 amps from the battery.
15% of your battery charge will also be going to the booster and lost as heat.
Good idea, but nothin is free.
R
The power to get 5 volts using a booster still comes from the 3.7 volt battery.
It's a pretty good idea, but not free.
Example:
If you use a 2.5 ohm atty on 3.7 volts, it will draw about 1.48 amps;
use the same atty on 5.0 volts and it will draw 2 amps;
use a booster to make the 5 volts from 3.7 volts at 85% efficiency;
and you will need 2.3 amps from the battery.
15% of your battery charge will also be going to the booster and lost as heat.
Good idea, but nothin is free.
R
i think maybe have something wrong
"Remember that you don't get nothin for free.
The power to get 5 volts using a booster still comes from the 3.7 volt battery.
It's a pretty good idea, but not free.
Example:
If you use a 2.5 ohm atty on 3.7 volts, it will draw about 1.48 amps;
use the same atty on 5.0 volts and it will draw 2 amps;
use a booster to make the 5 volts from 3.7 volts at 85% efficiency;
and you will need2.3 amps(exactly is 3.18A not 2.3A from Pout/Pin=Eff, Pout=5v*2A=10w so Pin=10w/0.85=11.76W, so Iin=11.76W/3.7V=3.18A) from the battery.
15% of your battery charge will also be going to the booster and lost as heat.
Good idea, but nothin is free.
R"
"Remember that you don't get nothin for free.
The power to get 5 volts using a booster still comes from the 3.7 volt battery.
It's a pretty good idea, but not free.
Example:
If you use a 2.5 ohm atty on 3.7 volts, it will draw about 1.48 amps;
use the same atty on 5.0 volts and it will draw 2 amps;
use a booster to make the 5 volts from 3.7 volts at 85% efficiency;
and you will need
15% of your battery charge will also be going to the booster and lost as heat.
Good idea, but nothin is free.
R"
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