PowerBoost 500 Basic - LBO

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Aelindgard
 
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PowerBoost 500 Basic - LBO

Post by Aelindgard »

Hello. I just have a quick question.

This is with regards to the Low Battery Output pin. As quoted from the learn page for the product;
By default it is pulled high to BAT but when the charger detects a low voltage (under 3.2V) the pin will drop down to 0V
and knowing that this board is supposed to be able to work with a minimum input of 1.8V, would that mean that the LBO pin be pulled down to 0V when using a 1.8V source?

The reason I am asking is that I will be using a 3V power source and would like to be able to detect a custom value to denote when the battery should be considered as being low.

Thank you in advance.

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adafruit_support_bill
 
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Re: PowerBoost 500 Basic - LBO

Post by adafruit_support_bill »

would that mean that the LBO pin be pulled down to 0V when using a 1.8V source?
Yes. While the board will work with a 1.8v source, it is optimized for use with LiPo cells.

Aelindgard
 
Posts: 2
Joined: Fri Jul 25, 2014 12:26 am

Re: PowerBoost 500 Basic - LBO

Post by Aelindgard »

Hi, is the detection of 3.2V something that can be changed in software or is it a hardware sensing implementation? Is there something else in the line up that allows me to do power sensing?

Thank you.

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adafruit_support_bill
 
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Re: PowerBoost 500 Basic - LBO

Post by adafruit_support_bill »

The voltage threshold is set with a resistor divider. You would have to hack the board and change the resistors.

http://www.ti.com/lit/ds/symlink/tps61090.pdf

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