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LP3941A Datasheet(PDF) 13 Page - National Semiconductor (TI) |
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LP3941A Datasheet(HTML) 13 Page - National Semiconductor (TI) |
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13 / 32 page  Comparators’ Electrical Characteristics (Continued) Unless otherwise noted, V BATT = +2.5V to 5.5V, VO3 = 3.0V, VCM = 0.27V. Typical values and limits appearing in normal type apply for T J = 25˚C. Limits appearing in boldface type apply over the entire junction temperature range for operation, −40 to +125˚C. (Notes 2, 8, 9) Symbol Parameter Condition Min Typ Max Units I Q Quiescent Current per Comparator 5µA Note: Comparator output buffers are powered by LDO3 output voltage. RESET Electrical Characteristics Unless otherwise noted, V BATT = +2.5V to 5.5V. Typical values and limits appearing in normal type apply for TJ = 25˚C. Limits appearing in boldface type apply over the entire junction temperature range for operation, −40 to +125˚C. (Notes 2, 8, 9) Symbol Parameter Condition Min Typ Max Units V OH Output Voltage High Internal Logic Supply I SOURCE =0µA V O3–0.2 V V OL Output Voltage Low Internal Logic Supply I SINK = 500 µA 0.4 V V TSHLD V O1 Threshold V O1 Rising 90 93 96 % V O1 Falling 82 85 88 % t DELAY RESET Active Time-Out Period From V O1 ≥ 93% until RESET = High 34 40 47 ms t PS-HOLD PS-HOLD Timer From RESET = Hi to PS-HOLD = Hi From PS-HOLD = Low to RESET = Low 29 35 41 ms t RESET Shut-Down Timer From RESET = Low until LDOs turned off (no output regulation) 51 60 70 ms R PU Pull-up Resistance to V O1 14 k Ω I S-MAX Maximum Sink Current 5 mA LED Driver Electrical Characteristics Unless otherwise noted, V BATT = +2.5V to 5.5V. Typical values and limits appearing in normal type apply for TJ = 25˚C. Limits appearing in boldface type apply over the entire junction temperature range for operation, −40 to +125˚C. (Notes 2, 8, 9) Symbol Parameter Condition Min Typ Max Units V OL LED1–3 Output Low Level I SINK = 40 mA 0.17 0.55 V I LEAKAGE LED1–3 Off Leakage Current V DR = 5.5V 4 µA Main Battery Charger Electrical Characteristics Unless otherwise noted, V CHG-IN = 5V, VBATT = 4V. Typical values and limits appearing in normal type apply for TJ = 25˚C. Limits appearing in boldface type apply over the entire junction temperature range for operation, −40 to +125˚C. (Notes 2, 9, 8, 12) Symbol Parameter Condition Min Typ Max Units V CHG-IN Input Voltage Range 4.5 12 V Operating Range Battery Connected 4.5 6 V OK−TSHD Adapter OK Trip Point (CHG-IN) V CHG-IN–VBATT Rising 80 mV V CHG-IN–VBATT Falling 30 mV V UVLO−TSHD Under Voltage Lock-Out Trip Point V CHG-IN Rising 3.85 4.25 4.65 V V CHG-IN Falling 3.90 V V OVLO−TSHD Over Voltage Lock-Out Trip Point V CHG-IN Rising 5.46 6.00 6.54 V V CHG-IN Falling 5.80 V I BATTSENSE Leakage Current V BATT = 4.2V 8 µA I BATT Battery Input Current V CHG-IN ≤ 4V 2 µA Charging Complete, charger connected, V BATT = 4.1V 150 µA www.national.com 13 |
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