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MAX1908 Datasheet(PDF) 5 Page - Maxim Integrated Products |
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MAX1908 Datasheet(HTML) 5 Page - Maxim Integrated Products |
5 / 30 page Low-Cost Multichemistry Battery Chargers _______________________________________________________________________________________ 5 ELECTRICAL CHARACTERISTICS (continued) (VDCIN = VCSSP = VCSSN = 18V, VBATT = VCSIP = VCSIN = 12V, VREFIN = 3V, VVCTL = VICTL = 0.75 x VREFIN, CELLS = open, 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 TRIP POINTS VDCIN falling, referred to VCSIN (MAX1908/MAX8724 only) 50 100 150 BATT Power-Fail Threshold VCSSP falling, referred to VCSIN (MAX8765/MAX8765A only) 50 100 150 mV BATT Power-Fail Threshold Hysteresis 200 mV ACIN rising (MAX8765/MAX8765A only) 2.028 2.048 2.068 ACIN Threshold ACIN rising (MAX1908/MAX8724 only) 2.007 2.048 2.089 V ACIN Threshold Hysteresis 0.5% of REF 20 mV ACIN Input Bias Current VACIN = 2.048V -1 +1 µA SWITCHING REGULATOR DHI Off-Time VBATT = 16V, VDCIN = 19V, VCELLS = VREFIN 0.36 0.4 0.44 µs DHI Minimum Off-Time VBATT = 16V, VDCIN = 17V, VCELLS = VREFIN 0.24 0.28 0.33 µs DHI Maximum On-Time 2.5 5 7.5 ms DLOV Supply Current DLO low 5 10 µA BST Supply Current DHI high 6 15 µA BST Input Quiescent Current VDCIN = 0V, VBST = 24.5V, VBATT = VLX = 20V 0.3 1 µA LX Input Bias Current VDCIN = 28V, VBATT = VLX = 20V 150 500 µA LX Input Quiescent Current VDCIN = 0V, VBATT = VLX = 20V 0.3 1 µA DHI Maximum Duty Cycle 99 99.9 % Minimum Discontinuous-Mode Ripple Current 0.5 A Battery Undervoltage Charge Current VBATT = 3V per cell (RS2 = 15m Ω), MAX1908 only, VBATT rising 150 300 450 mA CELLS = GND, MAX1908 only, VBATT rising 6.1 6.2 6.3 CELLS = open, MAX1908 only, VBATT rising 9.15 9.3 9.45 Battery Undervoltage Current Threshold CELLS = VREFIN, MAX1908 only, VBATT rising 12.2 12.4 12.6 V DHI On-Resistance High VBST - VLX = 4.5V, IDHI = +100mA 4 7 Ω DHI On-Resistance Low VBST - VLX = 4.5V, IDHI = -100mA 1 3.5 Ω DLO On-Resistance High VDLOV = 4.5V, IDLO = +100mA 4 7 Ω DLO On-Resistance Low VDLOV = 4.5V, IDLO = -100mA 1 3.5 Ω |
Similar Part No. - MAX1908_09 |
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Similar Description - MAX1908_09 |
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