MAX8725 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX8725 Datasheet PDF : 30 Pages
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Multichemistry Battery Chargers with Automatic
System Power Selector
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, VDCIN = VCSSP = VCSSN = 18V, VBATT = VCSIP = VCSIN = 12V, VVCTL = VICTL = 1.8V, MODE = float, ACIN = 0, CLS =
REF, GND = PGND = 0, PKPRES = GND, LDO = DLOV, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
DHIV Sink Current
10
mA
DHI On-Resistance Low
DHI On-Resistance High
DLO On-Resistance High
DLO On-Resistance Low
ERROR AMPLIFIERS
DHI = VDHIV, IDHI = -10mA
DHI = VCSSN, IDHI = 10mA
VDLOV = 4.5V, IDLO = +100mA
VDLOV = 4.5V, IDLO = -100mA
2
5
Ω
2
4
Ω
3
7
Ω
1
3
Ω
GMV Loop Transconductance
VCTL = 3.6, VBATT = 16.8V, MODE = LDO
VCTL = 3.6, VBATT = 12.6V, MODE = FLOAT
0.0625 0.125 0.2500
mA/V
0.0833 0.167 0.3330
GMI Loop Transconductance
MAX1909: ICTL = 3.6V, MAX8725: VICTL =
3.2V, VCSSP - VCSIN = 75mV
0.5
1
2
mA/V
GMS Loop Transconductance
VCLS = 2.048V, VCSSP - VCSSN = 75mV
0.5
1
2
mA/V
CCI/CCS/CCV Clamp Voltage
LOGIC LEVELS
0.25V < VCCV < 2.0V, 0.25V < VCCI < 2.0V,
150
300
600
mV
0.25V < VCCS < 2.0V
MODE Input Low Voltage
0.8
V
MODE Input Middle Voltage
MODE Input High Voltage
1.6
1.8
2.0
V
2.8
V
MODE Input Bias Current
ACOK AND PKPRES
MODE = 0V or 3.6V
-2
+2
µA
ACOK Input Voltage Range
0
28
V
ACOK Sink Current
ACOK Leakage Current
PKPRES Input Voltage
Range
PKPRES Input Bias Current
VACOK = 0.4V, ACIN = 1.5V
VACOK = 28V, ACIN = 2.5V
1
mA
1
µA
0
LDO
V
-1
+1
µA
PKPRES Battery Removal Detect
Threshold
MAX8725, PKPRES rising
55
% of
LDO
PKPRES Hysteresis
MAX8725
1
%
PDS, PDL SWITCH CONTROL
PDS Switch Turn-Off Threshold
PDS Switch Threshold Hysteresis
VDCIN - VBATT, VDCIN falling
VDCIN - VBATT
50
100
150
mV
100
200
300
mV
PDS Output Low Voltage, PDS
Below SRC
IPDS = 0A
8
10
12
V
PDS Turn-On Current
PDS = SRC
6
12
mA
PDS Turn-Off Current
PDL Switch Turn-On Threshold
PDL Switch Threshold Hysteresis
VPDS = VSRC - 2V, VDCIN = 16V
VDCIN - VBATT, VDCIN falling
VDCIN - VBATT
10
50
mA
50
100
150
mV
100
200
300
mV
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