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MAX1908ETI Datasheet(PDF) 6 Page - Maxim Integrated Products |
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MAX1908ETI Datasheet(HTML) 6 Page - Maxim Integrated Products |
6 / 27 page Low-Cost Multichemistry Battery Chargers 6 _______________________________________________________________________________________ ELECTRICAL CHARACTERISTICS (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 = -40°C to +85°C, unless otherwise noted.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS CHARGE VOLTAGE REGULATION VVCTL = VREFIN (2, 3, or 4 cells) -0.6 +0.6 VVCTL = VREFIN / 20 (2, 3, or 4 cells) -0.6 +0.6 Battery Regulation Voltage Accuracy VVCTL = VLDO (2, 3, or 4 cells) -0.6 +0.6 % REFIN Range (Note 1) 2.5 3.6 V REFIN Undervoltage Lockout VREFIN falling 1.92 V CHARGE CURRENT REGULATION CSIP-to-CSIN Full-Scale Current- Sense Voltage VICTL = VREFIN 70.5 79.5 mV VICTL = VREFIN -6 +6 VICTL = VREFIN × 0.6 -7.5 +7.5 VICTL = VLDO -7.5 +7.5 Charging Current Accuracy MAX8724 only: VICTL = VREFIN x 0.058 -33 +33 % BATT/CSIP/CSIN Input Voltage Range 0 19 V VDCIN = 0 or VICTL = 0 or SHDN = 0 1 CSIP/CSIN Input Current Charging 650 µA Cycle-by-Cycle Maximum Current Limit IMAX RS2 = 0.015 Ω 6.0 7.5 A ICTL Power-Down Mode Threshold Voltage VICTL rising REFIN / 100 REFIN / 33 V ICHG Transconductance GICHG VCSIP - VCSIN = 45mV 2.7 3.3 µA/mV VCSIP - VCSIN = 75mV -7.5 +7.5 VCSIP - VCSIN = 45mV -7.5 +7.5 ICHG Accuracy VCSIP - VCSIN = 5mV -40 +40 % INPUT CURRENT REGULATION CSSP-to-CSSN Full-Scale Current-Sense Voltage 71.25 78.75 mV VCLS = VREF -5 +5 Input Current-Limit Accuracy VCLS = VREF / 2 -7.5 +7.5 % CSSP, CSSN Input Voltage Range 8 28 V VDCIN = 0 1 CSSP, CSSN Input Current VCSSP = VCSSN = VDCIN > 8V 600 µA CLS Input Range 1.6 REF V IINP Transconductance GIINP VCSSP - VCSSN = 75mV 2.7 3.3 µA/mV VCSSP - VCSSN = 75mV -7.5 +7.5 IINP Accuracy VCSSP - VCSSN = 37.5mV -7.5 +7.5 % |
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