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LTC4061EDD Datasheet(PDF) 11 Page - Linear Technology |
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LTC4061EDD Datasheet(HTML) 11 Page - Linear Technology |
11 / 20 page LTC4061 4061fd operaTion Figure1.NTCCircuitInformation – + – + – + 0.35 • VCC 0.76 • VCC 0.016 • VCC TOO COLD TOO HOT ENABLE RNTC RNOM 2 LTC4061 VCC 4061 F01 NTC applicaTions inForMaTion ProgrammingChargeTermination The LTC4061 can terminate a charge cycle using one of several methods, allowing the designer considerable flex- ibility in choosing an ideal charge termination algorithm. Table1showsabriefdescriptionofthedifferenttermination methods and their behaviors. ChargeTimeTermination Connecting a capacitor (CTIMER) to the TIMER pin enables the timer and selects charge time termination. The total charge time is set by: TIME HOURS C µF HOURS TIMER ( ) . • = 0 1 3 Table1. METHOD Charge Time Termination Mode Charge Current Termination TIMER 0.1µF to GND IDET RDET to GND CHARGER DESCRIPTION Charges for 3 Hours. After 3 Hours, the Charger Stops Charging and Enters Standby Mode. Recharge Cycles Last for 1.5 Hours. Charges for 3 Hours. After 3 Hours, the Charger Stops Charging and Enters Standby Mode. Recharge Cycles Last for 1.5 Hours. Charges Until Charge Current Drops Below IDET, Then Enters Standby Mode. Pull-Down State When Charging. High Impedance State When Charging Is Stopped. Pulsing State Available When NTC Is Used and Is Still Charging. Pull-Down State When Charging. High Impedance State When Charging Is Stopped. Pulsing State Available When NTC Is Used and Is Still Charging. CHRG OUTPUT DESCRIPTION Pull-Down State While IBAT > IDET. High Impedance State While IBAT < IDETECT or When Charging Is Stopped. Pulsing State Available When NTC Is Used and Is Still Charging. Pull-Down State While IBAT > IDETECT. High Impedance State While IBAT < IDETECT or When Charging Is Stopped. Pulsing State Available When NTC Is Used and Is Still Charging. 0.1µF to GND GND RDET to GND User Selectable Charge Termination VCC RDET to GND Charges Indefinitely. Charges Indefinitely. SmartStart Is Disabled. VCC NC Charges Indefinitely. SmartStart Is Disabled. Pull-Down State When Charging. High Impedance State When Charging Is Stopped. Pulsing State Available When NTC Is Used and Is Still Charging. Pull-Down State When Charging. High Impedance State When Charging Is Stopped. Pulsing State Available When NTC Is Used and Is Still Charging. GND NC NC |
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