BoopathiS
Member level 2
Hi,
I did experiment on LTC4015 IC for battery charging and discharging.
As per datasheet typical application circuit, Verified Vin and battery charging and discharging. Its working fine.
Above test i did with 3 terminal battery (positive, negative and NTC terminal)
Battery has same over-current protection circuit for both charging and dischagring. (Because it has same path for both charge and discharge cycle)
Charging and discharging has different current rating.
So i chosen battery has separate charge and discharge path. (battery PMS circuit has separate over current protection circuit for both charge and discharge )
For above 5 pin battery(charge positive, charge negative, discharge positive, discharge negative and NTC terminals), i have corrected LTC4015 circuit for separate charge and discharge path.
Rocker switch is connected at J2.
Please find the schematic diagram
Issues :
When turn ON and OFF the LTC4015 SYS teminal output(J2 connector), LTC4015 get damaged.
Tested 2 boards, in both board after few events(5 to 10times of J2 switching) LTC 4015 failed.
Observation :
Observed that Both Q3 MOSFET top Gate terminal(TG) and LTC4015 SW terminal shorted with ground. (Q3 Top MOSFET Gate and source terminal shorted to ground)
Removed Q3 MOSFET and verified that MOSFET not failed
After Removing Q3, still short exist between SW terminal to Ground.
Can you share me if you got any idea, Please share me.
I did experiment on LTC4015 IC for battery charging and discharging.
As per datasheet typical application circuit, Verified Vin and battery charging and discharging. Its working fine.
Above test i did with 3 terminal battery (positive, negative and NTC terminal)
Battery has same over-current protection circuit for both charging and dischagring. (Because it has same path for both charge and discharge cycle)
Charging and discharging has different current rating.
So i chosen battery has separate charge and discharge path. (battery PMS circuit has separate over current protection circuit for both charge and discharge )
For above 5 pin battery(charge positive, charge negative, discharge positive, discharge negative and NTC terminals), i have corrected LTC4015 circuit for separate charge and discharge path.
Rocker switch is connected at J2.
Please find the schematic diagram
Issues :
When turn ON and OFF the LTC4015 SYS teminal output(J2 connector), LTC4015 get damaged.
Tested 2 boards, in both board after few events(5 to 10times of J2 switching) LTC 4015 failed.
Observation :
Observed that Both Q3 MOSFET top Gate terminal(TG) and LTC4015 SW terminal shorted with ground. (Q3 Top MOSFET Gate and source terminal shorted to ground)
Removed Q3 MOSFET and verified that MOSFET not failed
After Removing Q3, still short exist between SW terminal to Ground.
Can you share me if you got any idea, Please share me.