LTC4020_15 Datasheet, PDF (36/42 Pages) Linear Technology – 55V Buck-Boost Multi-Chemistry Battery Charger

LTC4020
APPLICATIONS INFORMATION
LTC4020 Constant-Current Charging Diagram
START
INDICATE NOT
CHARGING
BGATE PULLED
LOW
NO
POWER
AVAILABLE?
YES
CLEAR TIMER
NTC
YES
OUT-OF-RANGE?
NO
BGATE PULLED LOW
CHARGE AT
CONSTANT-CURRENT
INDICATE CHARGING
NO
TIMER ACTIVE?
YES
RUN TIMER
NO _{SAFETY TIMER} YES
AT EOC?
STOP CHARGING
INDICATE NTC
FAULT
ENABLE IDEAL
DIODE FUNCTION
NO
TIMERS ACTIVE?
YES
PAUSE TIMER
STOP CHARGING
INDICATE NOT
CHARGING
ENABLE IDEAL
DIODE FUNCTION
4020 CD02
36
For more information www.linear.com/LTC4020
4020fb