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MAX1908 数据表(PDF) 5 Page - Maxim Integrated Products

部件名 MAX1908
功能描述  Low-Cost Multichemistry Battery Chargers
PDF  30 Pages
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制造商  MAXIM [Maxim Integrated Products]
网页  https://www.maximintegrated.com/en.html
标志 MAXIM - Maxim Integrated Products

MAX1908 数据表(HTML) 5 Page - Maxim Integrated Products

  MAX1908 Datasheet HTML 1Page - Maxim Integrated Products MAX1908 Datasheet HTML 2Page - Maxim Integrated Products MAX1908 Datasheet HTML 3Page - Maxim Integrated Products MAX1908 Datasheet HTML 4Page - Maxim Integrated Products MAX1908 Datasheet HTML 5Page - Maxim Integrated Products MAX1908 Datasheet HTML 6Page - Maxim Integrated Products MAX1908 Datasheet HTML 7Page - Maxim Integrated Products MAX1908 Datasheet HTML 8Page - Maxim Integrated Products MAX1908 Datasheet HTML 9Page - Maxim Integrated Products Next Button
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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



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