Datasheet LTC4007-1 (Analog Devices) - 10

LTC4007-1
operaTion Table 1. Truth Table for LTC4007-1 Operation (Supplemental) PRESENT NEXT MAX FROM TO BATTERY C/10 C/10 BATTERY TIMER NUMBER STATE STATE MODE DCIN VOLTAGE LATCH LATCH CURRENT ACP STATE CHG
1 Any MSD Shut Down by Low <BAT 0 OFF LOW Reset HIGH Adapter Voltage 2 MSD SD Charger Shutdown >BAT 0 OFF HIGH Reset HIGH 3 SD, SD Shut Down by >BAT OFF HIGH Reset HIGH* CONDITION, Undervoltage Lockout and CHARGE <UVL 4 SD CONDITION Start Conditioning a >BAT <3.25V/Cell 10% HIGH LOW Depleted Battery Programmed Current 5 CONDITION CONDITION Input Current Limited >BAT <3.25V/Cell <10% HIGH Running LOW Condition Charging Programmed Current (Note 2) 6 CONDITION CONDITION Conditioning a >BAT <3.25V/Cell 10% HIGH Running LOW Depleted Battery Programmed Current 7 CONDITION CONDITION Timer Defeated (Low >BAT <3.25V/Cell 10% HIGH Ignored Forced Battery Conditioning Still Programmed LOW Functional) Current 8 CONDITION SD Charger Paused Due to >BAT <3.25V/Cell OFF HIGH Paused LOW Thermistor Out of Range (Faulted) 9 CONDITION SD Timeout in >BAT <3.25V/Cell OFF HIGH >T/4 HIGH CONDITION Mode (Faulted) 10 CONDITION SD Shut Down by >BAT <3.25V/Cell 0 OFF Forced Reset HIGH ACP/SHDN Pin LOW 11 CONDITION CHARGE Start Normal Charging >BAT >3.25V/Cell Programmed HIGH Running Current 12 CHARGE CHARGE Timer Defeated (Low >BAT >3.25V/Cell Programmed HIGH Ignored Forced Battery Conditioning Still Current LOW Functional) 13 CHARGE CHARGE Top-Off Charging >BAT >3.25V/Cell 0 Programmed HIGH Running LOW Current 14 CHARGE CHARGE C/10 Latch is SET >BAT >3.25V/Cell 1 Programmed HIGH Reset 25µA when Battery Current Current Is Less than 10% of Programmed Current 15 CHARGE CHARGE Top-Off Charging >BAT >3.25V/Cell 1 Programmed HIGH Running 25µA Current 16 CHARGE CHARGE Input Current >BAT >3.25V/Cell <Programmed HIGH Limited Charging Current (Note 2) 17 CHARGE SD Charger Paused Due to >BAT >3.25V/Cell OFF HIGH Paused LOW or Thermistor Out of Range 25µA (Faulted) 18 CHARGE SD Shut Down by >BAT >3.25V/Cell 0 OFF Forced Reset HIGH ACP/SHDN Pin LOW 19 CHARGE SD Terminated by Low- >BAT <3.25V/Cell 0 OFF HIGH >T/4 then HIGH Battery Fault (Note 1) Reset (Faulted) 20 CHARGE SD Terminates After T/4 >BAT VFLOAT 1 OFF HIGH >T/4 then HIGH Reset 21 CHARGE SD Terminates After T >BAT VFLOAT* 0 OFF HIGH >T then HIGH Reset *Most probable condition
Note 1:
If a depleted battery is inserted while the charger is in this state,
Note 3:
Blank fields indicate no change, not considered, or other states the charger must be reset to initiate charging. impact value.
Note 2:
See section on “Adapter Limiting”.
Note 4:
Battery voltage thresholds do not include comparator hysterisis. Thresholds specify the VLH value. 40071fa 10 For more information www.linear.com/LTC4007-1 Document Outline Description Typical Application Absolute Maximum Ratings Typical Performance Characteristics Pin Functions Block Diagram Operation Typical Application Related Parts