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 = -40°C to +85°C, unless otherwise noted.)
PARAMETER
MODE Input High Voltage
ACOK AND PKPRES
ACOK Input Voltage Range
ACOK Sink Current
PKPRES Input Voltage Range
PKPRES Battery Removal Detect
Threshold
SYMBOL
CONDITIONS
VACOK = 0.4V, ACIN = 1.5V
MAX8725, PKPRES rising
MIN TYP MAX UNITS
2.8
V
0
28
V
1
mA
0
LDO
V
% of
55
LDO
PDS, PDL SWITCH CONTROL
PDS Switch Turn-Off Threshold
PDS Switch Threshold Hysteresis
PDS Output Low Voltage, PDS
Below SRC
PDS Turn-On Current
PDS Turn-Off Current
PDL Switch Turn-On Threshold
PDL Switch Threshold Hysteresis
PDL Turn-On Resistance
PDL Turn-Off Current
SRC Input Bias Current
VDCIN - VBATT, VDCIN falling
VDCIN - VBATT
IPDS = 0A
PDS = SRC
VPDS = VSRC - 2V, VDCIN = 16V
VDCIN - VBATT, VDCIN falling
VDCIN - VBATT
PDL = GND
VSRC - VPDL = 1.5V
SRC = 19, VBATT = 16V
50
150
mV
100
300
mV
8
12
V
6
mA
10
mA
50
150
mV
100
300
mV
50
150
kΩ
6
mA
1000
µA
Note 1: Guaranteed by design. Not production tested.
Typical Operating Characteristics
(Circuit of Figure 2, VDCIN = 20V, charge current = 3A, 4 Li+ series cells, TA = +25°C, unless otherwise noted.)
BATTERY INSERTION
AND REMOVAL RESPONSE
MAX1909/MAX8725 toc01
VCCV
VCCI
VCCV
VCCI
VCCI
500µs/div
17V
VBATT
16V
5A/div
IBATT
0A
IIN
0A 5A/div
3V
VCCV
2V
VCCI, VCCV
1V
0V
SYSTEM LOAD-TRANSIENT RESPONSE
5A MAX1909/MAX8725 toc02
ISYSTEMLOAD
0A
5A
IIN
0A
5AIBATT
0A
CCS
3V
CCI
100µs/div
2V
VCCI
1V
VCCS
0V
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