Datasheet LTC4110 (Analog Devices) - 4
| Fabricante | Analog Devices |
| Descripción | Battery Backup System Manager |
| Páginas / Página | 52 / 4 — ELECTRICAL CHARACTERISTICS. The. denotes the specifi cations which apply … |
| Formato / tamaño de archivo | PDF / 466 Kb |
| Idioma del documento | Inglés |
ELECTRICAL CHARACTERISTICS. The. denotes the specifi cations which apply over the full operating
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LTC4110
ELECTRICAL CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. Unless otherwise specifi ed, VDCIN = VDCOUT = VDCDIV = 12V, VBAT = 8.4V, GND = SGND = CLP = CLN = SHDN = 0V and RVREF = 49.9k. All currents into device pins are positive and all currents out of device pins are negative. All voltages are referenced to GND, unless otherwise specifi ed. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VBOV Battery Overvoltage Threshold; All Li-Ion, Lead Acid as Percentage of VBAT Increasing Float Voltage 105 107.5 110 % NiMH/NiCd (Note 8) 1.80 1.85 1.90 V VBOVH Battery Overvoltage Threshold Hysteresis; All Li-Ion, Lead Acid as Percentage of VBAT Increasing. Float Voltage 2 % NiMH/NiCd (Note 8) 40 mV VREF Reference Pin Voltage Range l 1.208 1.220 1.232 V FTMR Programmed Timer Accuracy CTIMER = 47nF l –15 0 15 % tTIMEOUT Time Between Receiving Valid l 140 175 210 sec ChargingCurrent() and ChargingVoltage() Commands. Wake-Up Timer.
Calibration Performance
VCTOL Calibration Cut-Off Default Voltage Accuracy; 2.75V for Li-Ion, 1.93V for Lead Acid, –1.1 1.1 % VBAT Decreasing VCAL = GND (Note 8), 0.95V for NiMH/NiCd l –1.3 1.3 % VCTOLH Calibration Cut-Off Default Voltage Hysteresis; Li-Ion 85 mV VBAT Increasing. (Note 8) Lead Acid 50 mV NiMH/NiCd 40 mV VCATOL Calibration Cut-Off Voltage Adjust Accuracy ±400mV for Li-Ion, ±300mV for Lead Acid, l –1.5 1.5 % ±200mV for NiMH/NiCd (Note 8) IFTOL Calibration Current Accuracy (Note 7) VCSP – VCSN = –100mV l –5 5 % IVCAL VCAL Pin Leakage Current VCAL = 1.25V –100 100 nA IBDT Back-Drive Current Limit Threshold VCLP – VCLN Decreasing l 7 10 13 mV VCLN = VDCIN IBDH Back-Drive Current Limit Threshold Hysteresis VCLP – VCLN Increasing 1 mV VCLN = VDCIN VOVP Calibration Mode Input Overvoltage VDCDIV Rising l 1.4 1.5 1.6 V Comparator DCDIV Pin Threshold VOVPH Calibration Mode Input Overvoltage VDCDIV Falling 100 mV Comparator DCDIV Pin Hysteresis
AC Present and Discharge Cut-Off Comparators
VAC AC Present Comparator DCDIV Pin Threshold VDCDIV Falling l 1.196 1.22 1.244 V VACH AC Present Comparator DCDIV Pin Hysteresis VDCDIV Rising 50 mV IAC AC Present Comparator DCDIV Pin Input Bias VDCDIV = 1.25V 100 nA Current tAC ACPb Pin Externally Programmed Falling Delay CACPDLY = 100nF, RVREF = 49.9k, VDCDIV Stepped From 1.17V to 1.30V 8 10 12 ms VDTOL Discharge Cut-Off Default Voltage Accuracy; 2.75V for Li-Ion, 1.93V for Lead Acid, l –1.5 1.5 % VBAT Decreasing VDIS = GND, 0.95V for NiMH/NiCd VDTOLH Discharge Cut-Off Default Voltage Hysteresis; Li-Ion 85 mV VBAT Increasing (Note 8) Lead acid 50 mV NiMH/NiCd 40 mV VDATOL Discharge Cut-Off Voltage Adjust Accuracy ±400mV for Li-Ion, ±300mV for Lead Acid, l 2 2 % ±200mV for NiMH/NiCd IVDIS VDIS Pin Bias Current VDIS = 1.25V –100 100 nA 4110fb 4
ELECTRICAL CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. Unless otherwise specifi ed, VDCIN = VDCOUT = VDCDIV = 12V, VBAT = 8.4V, GND = SGND = CLP = CLN = SHDN = 0V and RVREF = 49.9k. All currents into device pins are positive and all currents out of device pins are negative. All voltages are referenced to GND, unless otherwise specifi ed. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VBOV Battery Overvoltage Threshold; All Li-Ion, Lead Acid as Percentage of VBAT Increasing Float Voltage 105 107.5 110 % NiMH/NiCd (Note 8) 1.80 1.85 1.90 V VBOVH Battery Overvoltage Threshold Hysteresis; All Li-Ion, Lead Acid as Percentage of VBAT Increasing. Float Voltage 2 % NiMH/NiCd (Note 8) 40 mV VREF Reference Pin Voltage Range l 1.208 1.220 1.232 V FTMR Programmed Timer Accuracy CTIMER = 47nF l –15 0 15 % tTIMEOUT Time Between Receiving Valid l 140 175 210 sec ChargingCurrent() and ChargingVoltage() Commands. Wake-Up Timer.
Calibration Performance
VCTOL Calibration Cut-Off Default Voltage Accuracy; 2.75V for Li-Ion, 1.93V for Lead Acid, –1.1 1.1 % VBAT Decreasing VCAL = GND (Note 8), 0.95V for NiMH/NiCd l –1.3 1.3 % VCTOLH Calibration Cut-Off Default Voltage Hysteresis; Li-Ion 85 mV VBAT Increasing. (Note 8) Lead Acid 50 mV NiMH/NiCd 40 mV VCATOL Calibration Cut-Off Voltage Adjust Accuracy ±400mV for Li-Ion, ±300mV for Lead Acid, l –1.5 1.5 % ±200mV for NiMH/NiCd (Note 8) IFTOL Calibration Current Accuracy (Note 7) VCSP – VCSN = –100mV l –5 5 % IVCAL VCAL Pin Leakage Current VCAL = 1.25V –100 100 nA IBDT Back-Drive Current Limit Threshold VCLP – VCLN Decreasing l 7 10 13 mV VCLN = VDCIN IBDH Back-Drive Current Limit Threshold Hysteresis VCLP – VCLN Increasing 1 mV VCLN = VDCIN VOVP Calibration Mode Input Overvoltage VDCDIV Rising l 1.4 1.5 1.6 V Comparator DCDIV Pin Threshold VOVPH Calibration Mode Input Overvoltage VDCDIV Falling 100 mV Comparator DCDIV Pin Hysteresis
AC Present and Discharge Cut-Off Comparators
VAC AC Present Comparator DCDIV Pin Threshold VDCDIV Falling l 1.196 1.22 1.244 V VACH AC Present Comparator DCDIV Pin Hysteresis VDCDIV Rising 50 mV IAC AC Present Comparator DCDIV Pin Input Bias VDCDIV = 1.25V 100 nA Current tAC ACPb Pin Externally Programmed Falling Delay CACPDLY = 100nF, RVREF = 49.9k, VDCDIV Stepped From 1.17V to 1.30V 8 10 12 ms VDTOL Discharge Cut-Off Default Voltage Accuracy; 2.75V for Li-Ion, 1.93V for Lead Acid, l –1.5 1.5 % VBAT Decreasing VDIS = GND, 0.95V for NiMH/NiCd VDTOLH Discharge Cut-Off Default Voltage Hysteresis; Li-Ion 85 mV VBAT Increasing (Note 8) Lead acid 50 mV NiMH/NiCd 40 mV VDATOL Discharge Cut-Off Voltage Adjust Accuracy ±400mV for Li-Ion, ±300mV for Lead Acid, l 2 2 % ±200mV for NiMH/NiCd IVDIS VDIS Pin Bias Current VDIS = 1.25V –100 100 nA 4110fb 4