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Original post by: tonyhamre ,

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1st the TriStar is not a charging IC it is a high speed switch that switches between vcc main/vccbatt it also switches cpu and baseband hence the name tri. Tigris is the charging IC. TriStar requires three voltages to function, a reverse gate handshake pin power in. If you have schematics and tools I will help you tomorrow when I am in work

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