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Hi,

Yes, this feature is supported; the IC should terminate at regulation voltage. Can you measure the battery voltage and see if it reaches voltage regulation level (4.2V) and still IC does not terminate?

 -Tahar

Hi,

Yes battery reaches to 4.2V and charging current drops to <1.9mA, it means battery charging terminated.

But that is not reflected on pins STAT1 and STAT2. Why i am not getting these signals as Charge Done?

That's what i am asking, are STAT1 and STAT2 pins reflects Charge Done to micro-processor?

Thanks,

PC

Please see figure 3 in the datasheet. The charger enters a taper detector phase then terminates after the charging currents drops below the termination voltage.  Itaper is set using equation 3 in the DS and I termination is set using equation 3 in the DS (what are the Iterm and Itaper in your design?). Please see if these parameters are set correctly. Again, the charge done state should be reported after the termination occurred as shown in table 2 in the DS.

Tahar

Hi,

As per my circuit Rset=1.5Kohm

As per specifications on DS

Vtaper= 250mV

Kset= 320

Vterm= 18mV

So that Itaper=53mA approx.

 and Iterm=3.84mA approx.

So even though my charging current drops below 2mA (read using Current Meter), why STAT1 and STAT2 did not reflect Charge Done?

Thanks,

PC.

In addition to Charles post, also try to increase the termination & taper currents and see if that makes a difference. Please send me some plot pictures of voltage and current at BAT/OUT.   

Tahar

_{any updates...}

Hi,

Was away.

Now working on it, will need time to come out with results.

Thanks,

PC.

Hi,

Thanks to all.

Found it,  now working.

During charging my load was connected. I did not disable the load. That's why was not getting Charge Done.

Now I put whole load into power down mode and I got Charge Done.

Thanks a lot to all.

PC.