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ManualsBrandsLinear Technology ManualsBattery Charger ICsBattery Charging IC QFN
31323334353637383940
LTC4020
36
4020fd
For more information www.linear.com/LTC4020
applicaTions inForMaTion
LTC4020 Constant-Current Charging Diagram
POWER
AVAILABLE?
INDICATE NOT
CHARGING
BGATE PULLED
LOW
CLEAR TIMER
NO
NO
NO
4020 CD02
SAFETY TIMER
AT EOC?
NTC
OUT-OF-RANGE?
CHARGE AT
CONSTANT-CURRENT
BGATE PULLED LOW
TIMER ACTIVE?
INDICATE NTC
FAULT
ENABLE IDEAL
DIODE FUNCTION
TIMERS ACTIVE?
PAUSE TIMER
STOP CHARGING
START
INDICATE CHARGING
RUN TIMER
YES
YES
YES
NO
NO YES
YES
INDICATE NOT
CHARGING
ENABLE IDEAL
DIODE FUNCTION
STOP CHARGING
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