Can a 3.7v LiPo battery Boosted to 5V provide 2A peaks?

Thread Starter

mortonc

Joined Jun 6, 2014
7
I have a GSM device which runs at around 100mA most of the time however during transmission it can have v. short peaks of up to 2A.

It runs on 5V and I am planning on powering it with a 3.7v LiPo battery which is charged by a 6V Solar Panel.

The supply would then be boosted up from 3.7v to 5V to power the device.

What I would like to know is how I could ensure that I could power it from the LiPo. Perhaps through the use of a capacitor? Or will it be fine without interference?

Thanks
 

#12

Joined Nov 30, 2010
18,224
The devil is in the details. 2 amps for a millisecond? No problem for a capacitor.

Get down and dirty with the "how much" and, "how fast" and we can do some math.

Note to self: Must find out what a GSM is.
 

BobTPH

Joined Jun 5, 2013
8,806
The devil is in the details. 2 amps for a millisecond? No problem for a capacitor.

Get down and dirty with the "how much" and, "how fast" and we can do some math.

Note to self: Must find out what a GSM is.
A cellular modem.

Bob
 

#12

Joined Nov 30, 2010
18,224
So, mortonc want to fire bursts of information, probably from a picocell?
Entirely doable, but we need numbers for the math.
 

Thread Starter

mortonc

Joined Jun 6, 2014
7
So, mortonc want to fire bursts of information, probably from a picocell?
Entirely doable, but we need numbers for the math.
Don't have an oscilloscope so no way to give you a firm reading but I'm informed that it has 2A peaks for 477uS. Don't know how often.
 

takao21203

Joined Apr 28, 2012
3,702
MCP 1640 should be fine, with an additional low ESR cap, and maybe also needs an additional small inductor inbetween.

4.7uF ceramic from the booster is not enough for 500uSec or is it?
 
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