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Old 03-17-2015, 08:07 AM #1
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Default What happens to an xboost when input voltage is at 8.4v

just like the title says,
what happens to an x boost driver when the input voltage is 8.4volts.

haven't been building for a while and am a bit rusty so dont chastise me for this.

I was trying to fix some old builds and wanted to test the drivers. attached them to a host holding 2 16340 batteries, powered it on and took a reading, 2.1 amps.
clearly thats not right, tossed the driver and just realized today I had the input voltage way higher than allowed.


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Old 03-17-2015, 04:22 PM #2
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Default Re: What happens to an xboost when input voltage is at 8.4v

Nothing good happens when a device is driven outside of its input range.

Put it on a test load and see if it still performs as intended.
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Old 03-17-2015, 11:27 PM #3
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Default Re: What happens to an xboost when input voltage is at 8.4v

Yeah you could fry it in only seconds, but if there are no burn marks and there was no burn smell or gray wisps of smoke, then it may still be ok.

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Old 03-20-2015, 12:50 AM #4
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Default Re: What happens to an xboost when input voltage is at 8.4v

Here is what can happen when they are
heatsinked and run at 4.2V.



To this day I'm not really sure what it was,
but the Angelos are kind.
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Old 03-20-2015, 02:28 PM #5
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Default Re: What happens to an xboost when input voltage is at 8.4v

Yup. I burned up an SXB. I had my PS set for 8v and After about 15 seconds on the test load there was a pop then an orange flame as one of the components gave up the ghost.

Silly mistake. Don't make the same.
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Old 03-20-2015, 07:53 PM #6
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Default Re: What happens to an xboost when input voltage is at 8.4v

Quote:
Originally Posted by ARG View Post
Nothing good happens when a device is driven outside of its input range.
Tell that to the 97% of users here that run a laser diode at 300% rated current
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Old 03-20-2015, 09:43 PM #7
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Default Re: What happens to an xboost when input voltage is at 8.4v

^^^^ this
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