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Powerboost 1000c not working
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

Powerboost 1000c not working

by JimmyM on Thu Aug 08, 2019 5:36 am

I have bought the Adafruit Powerboost 1000 charger and a LiPo.
For the load I am using a FPGA development board cmod A7-35T from Digilent (see links below).
I have attached a picture of my setup below.

It all worked fine for 2 minutes, but then it started to smoke near the resistor R3 (1.87 Mohm).
I also used a switch for the enable pin and wired it up according to the assembly tutorial.

The input resistance between the JST power pins is 150kohm.

Sometimes the output voltage (5V) starts to flicker, but most of the time there is no output.
The red LED (Low battery output) is mostly lit up even though the batteries output voltage is 3.9V and when the USB is pluggedin the yellow LED (battery being charged) lights up.
Sometimes the whole board shuts down and none of the LEDs light up.

I don't have any idea what the issue here is.


Adafruit Powerboost 1000C:
https://www.adafruit.com/product/2465
LiPo:
https://www.play-zone.ch/en/polymer-lit ... m_store=de
Assembly tutorial Adafruit Powerboost 1000C:
https://learn.adafruit.com/adafruit-pow ... t/assembly
Attachments
powerboost_issue.jpg
powerboost_issue.jpg (45.01 KiB) Viewed 96 times

JimmyM
 
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Re: Powerboost 1000c not working

by adafruit_support_mike on Fri Aug 09, 2019 11:46 pm

How much current does your FPGA board use?

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Re: Powerboost 1000c not working

by JimmyM on Sat Aug 10, 2019 8:16 am

It only draws about 0.1 amps. I have tested it with a multimeter.

JimmyM
 
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Re: Powerboost 1000c not working

by adafruit_support_mike on Sat Aug 10, 2019 6:17 pm

That's well within the PowerBoost's limits, so we can rule out any kind of overload.

From your description, it sounds like an early component failure in the boost converter. Send a note containing a link to this page and your order number to support@adafruit.com. The folks there will get you a replacement PowerBoost 1000C.

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Please be positive and constructive with your questions and comments.