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 = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
ERROR AMPLIFIERS
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
GMV Amplifier Transconductance
GMV
VVCTL = VLDO, VBATT = 16.8V,
CELLS = VREFIN
0.0625 0.125 0.2500 µA/mV
GMI Amplifier Transconductance
GMI VICTL = VREFIN, VCSIP - VCSIN = 75mV
0.5
1
2.0 µA/mV
GMS Amplifier Transconductance GMS VCLS = VREF, VCSSP - VCSSN = 75mV
0.5
1
2.0 µA/mV
CCI, CCS, CCV Clamp Voltage
LOGIC LEVELS
CELLS Input Low Voltage
CELLS Input Open Voltage
CELLS Input High Voltage
0.25V < VCCV,CCS,CCI < 2V
CELLS = open
150 300 600
mV
0.4
V
(VREFIN
/2) -
0.2V
VREFIN/
2
(VREFIN
/2) +
0.2V
V
VREFIN
- 0.4V
V
CELLS Input Bias Current
ACOK AND SHDN
ACOK Input Voltage Range
ACOK Sink Current
ACOK Leakage Current
SHDN Input Voltage Range
SHDN Input Bias Current
SHDN Threshold
SHDN Threshold Hysteresis
CELLS = 0V or VREFIN
VACOK = 0.4V, VACIN = 3V
VACOK = 28V, VACIN = 0V
VSHDN = 0V OR VLDO
VSHDN = 0V OR VSHDN = 5V
VSHDN falling
-2
+2
µA
0
28
V
1
mA
1
µA
0
LDO
V
-1
+1
µA
-1
+1
22
23.5
25
% of
VREFIN
1
% of
VREFIN
6
Maxim Integrated
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