WF-139 schematic and mod to 4.15V

[joao2004]

Here it is, WF-139 schematic (05-2011) and how to mod it to 4.15V termination voltage

https://picasaweb.google.com/lh/photo/1LVMk1wxIOyoZK57HQyBZQ?feat=directlink

https://picasaweb.google.com/lh/photo/XZgTq_UazuO5YX7x4LNx9Q?feat=directlink

https://rapidshare.com/files/4029738950/WF-139_Schematic.pdf

 

[old4570]

Hmmm , Looks interesting ...

How about a 4.35v Mod ? for the Samsung 30A :candle:

 

[joao2004]

Hmmm , Looks interesting ...

How about a 4.35v Mod ? for the Samsung 30A :candle:

Need to change Vref to 2.59V... Termination voltage = Vref x 1.68
Something like this: