Rev 1.3 dev boards

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Frank
Posts: 159
Joined: Sun May 03, 2015 2:43 pm

Rev 1.3 dev boards

Post by Frank »

Do not power the board from the power jack. If you need to power the board away from a computer use a standard 5V USB power adapter.
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FatFootFX
Posts: 2
Joined: Mon Jul 13, 2020 4:11 pm

Re: Rev 1.3 dev boards

Post by FatFootFX »

Will that damage the board? I have already powered the board in that manner.
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Frank
Posts: 159
Joined: Sun May 03, 2015 2:43 pm

Re: Rev 1.3 dev boards

Post by Frank »

If powered for an extended period of time that way it can damage the FT260, we discovered the diodes have a higher reverse current so the voltage slowly rises above acceptable level. You can add a 4K7 resistor across C607 or C608 to fix this, I have purchased a reel of these and will mail some to you if you need one.
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scmitche
Posts: 12
Joined: Mon Mar 16, 2020 5:28 am

Re: Rev 1.3 dev boards

Post by scmitche »

Hi Frank,
I spotted in the datasheet that at 4V reverse voltage difference the Schottky diode leakage is approaching 0.09mA at 25C. I've ordered a reel of 200 4k7 SMD resistors so don't worry about my Development Board I'll sort it out. It's an easy and neat fix.
Steve
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