MAX1908 View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX1908 Datasheet PDF : 30 Pages
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MAX1908/MAX8724/MAX8765/MAX8765A
Low-Cost Multichemistry Battery Chargers
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 = -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
SUPPLY AND LDO REGULATOR
DCIN Input Voltage Range
DCIN Quiescent Current
VDCIN
IDCIN
BATT Input Current
IBATT
LDO Output Voltage
LDO Load Regulation
REFERENCE
REF Output Voltage
TRIP POINTS
8.0V < VDCIN < 28V
VBATT = 19V, VDCIN = 0V
VBATT = 2V to 19V, VDCIN = 19.3V
8V < VDCIN < 28V, no load
0 < ILDO < 10mA
0 < IREF < 500µA
BATT Power-Fail Threshold
ACIN Threshold
SWITCHING REGULATOR
VDCIN falling, referred to VCSIN
(MAX1908/MAX8724 only)
VCSSP falling, referred to VCSIN
(MAX8765/MAX8765A only)
ACIN rising (MAX8765/MAX8765A only)
ACIN rising (MAX1908/MAX8724 only)
DHI Off-Time
VBATT = 16V, VDCIN = 19V,
VCELLS = VREFIN
DHI Minimum Off-Time
VBATT = 16V, VDCIN = 17V,
VCELLS = VREFIN
DHI Maximum On-Time
DHI Maximum Duty Cycle
Battery Undervoltage Charge
Current
Battery Undervoltage Current
Threshold
DHI On-Resistance High
DHI On-Resistance Low
DLO On-Resistance High
DLO On-Resistance Low
VBATT = 3V per cell (RS2 = 15mΩ),
MAX1908 only, VBATT rising
CELLS = GND, MAX1908 only, VBATT rising
CELLS = open, MAX1908 only, VBATT rising
CELLS = VREFIN, MAX1908 only, VBATT rising
VBST - VLX = 4.5V, IDHI = +100mA
VBST - VLX = 4.5V, IDHI = -100mA
VDLOV = 4.5V, IDLO = +100mA
VDLOV = 4.5V, IDLO = -100mA
MIN
8
5.25
4.065
50
50
2.028
2.007
0.35
0.24
2.5
99
150
6.09
9.12
12.18
TYP
MAX UNITS
28
V
6
mA
1
µA
500
5.55
V
100
mV
4.120
V
150
mV
150
2.068
V
2.089
0.45
µs
0.33
µs
7.5
ms
%
450
mA
6.30
9.45
V
12.60
7
Ω
3.5
Ω
7
Ω
3.5
Ω
Maxim Integrated
9
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