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MAX1908 数据表(PDF) 3 Page - Maxim Integrated Products |
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MAX1908 数据表(HTML) 3 Page - Maxim Integrated Products |
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3 / 27 page ![]() Low-Cost Multichemistry Battery Chargers _______________________________________________________________________________________ 3 ELECTRICAL CHARACTERISTICS (continued) (VDCIN = VCSSP = VCSSN = 18V, VBATT = VCSIP = VCSIN = 12V, VREFIN = 3V, VVCTL = VICTL = 0.75 x VREFIN, CELLS = float, CLS = REF, VBST - VLX = 4.5V, ACIN = GND = PGND = 0, CLDO = 1µF, LDO = DLOV, CREF = 1µF; CCI, CCS, and CCV are compensated per Figure 1a; TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS VDCIN = 5V, VREFIN = 3V -1 +1 REFIN Input Bias Current VREFIN = 5V -1 +1 µA ICHG Transconductance GICHG VCSIP - VCSIN = 45mV 2.7 3 3.3 µA/mV VCSIP - VCSIN = 75mV -6 +6 VCSIP - VCSIN = 45mV -5 +5 ICHG Accuracy VCSIP - VCSIN = 5mV -40 +40 % ICHG Output Current VCSIP - VCSIN = 150mV, VICHG = 0 350 µA ICHG Output Voltage VCSIP - VCSIN = 150mV, ICHG = float 3.5 V INPUT CURRENT REGULATION CSSP-to-CSSN Full-Scale Current-Sense Voltage 72 75 78 mV VCLS = VREF -4 +4 Input Current-Limit Accuracy VCLS = VREF / 2 -7.5 +7.5 % CSSP, CSSN Input Voltage Range 8 28 V VDCIN = 0 0.1 1 CSSP, CSSN Input Current VCSSP = VCSSN = VDCIN > 8V 350 600 µA CLS Input Range 1.6 REF V CLS Input Bias Current VCLS = 2V -1 +1 µA IINP Transconductance GIINP VCSSP - VCSSN = 75mV 2.7 3 3.3 µA/mV VCSSP - VCSSN = 75mV -5 +5 IINP Accuracy VCSSP - VCSSN = 37.5mV -7.5 +7.5 % IINP Output Current VCSSP - VCSSN = 150mV, VIINP = 0 350 µA IINP Output Voltage VCSSP - VCSSN = 150mV,VIINP = float 3.5 V SUPPLY AND LDO REGULATOR DCIN Input Voltage Range VDCIN 8 28 V VDCIN falling 7 7.4 DCIN Undervoltage-Lockout Trip Point VDCIN rising 7.5 7.85 V DCIN Quiescent Current IDCIN 8.0V < VDCIN < 28V 3.2 6 mA VBATT = 19V, VDCIN = 0 1 BATT Input Current IBATT VBATT = 2V to 19V, VDCIN = 19.3V 200 500 µA LDO Output Voltage 8V < VDCIN < 28V, no load 5.25 5.4 5.55 V LDO Load Regulation 0 < ILDO < 10mA 34 100 mV LDO Undervoltage-Lockout Trip Point VDCIN = 8V 3.20 4 5.15 V REFERENCE REF Output Voltage 0 < IREF < 500µA 4.072 4.096 4.120 V |
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