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TWL6032 Full-charge current non-fixed

Other Parts Discussed in Thread: TWL6032

I use TWL6032 (POP=0, AUTOCHARGE=0), and VICHRG set to 1000mA.

When battery voltage rise, charge current downward.  (like, VBATT= 3.3V IBATT=950mA >> IBATT=4V, IBATT=780mA)

If  VBUS rise , then the current were increase to 950mA (VBATT= 4V).

It's seems the DPPM or ANTICOLLAPSE  function worked.

But I already disabled DPPM and ANTICOLLAPSE register.

Anybody know how to let full-charge current fixed?

Or, VBUS input voltage work range (for charger)?