MAX8725 Ver la hoja de datos (PDF) - Maxim Integrated
Número de pieza
componentes Descripción
Fabricante
MAX8725 Datasheet PDF : 30 Pages
| |||
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
SUPPLY AND LINEAR REGULATOR
DCIN Input Voltage Range
DCIN Undervoltage-Lockout Trip
Point
VDCIN
DCIN falling
DCIN rising
8.0
28
V
7
7.4
V
7.5
7.85
DCIN Quiescent Current
BATT Input Current
LDO Output Voltage
LDO Load Regulation
IDCIN 8.0V < VDCIN < 28V
2.7
6
mA
VBATT = 19V, VDCIN = 0V, or ICTL = 0V
0.1
1
IBATT VBATT = 16.8V, VDCIN = 19V, ICTL = 0V
0.1
1
µA
VBATT = 2V to 19V, VDCIN > VBATT + 0.3V
200 500
8.0V < VDCIN < 28V, no load
5.25
5.4
5.55
V
0 < ILDO < 10mA
80
115
mV
LDO Undervoltage-Lockout Trip
Point
VDCIN = 8.0V
3.20
4
5.15
V
REFERENCE
REF Output Voltage
REF Undervoltage-Lockout Trip
Point
TRIP POINTS
BATT POWER_FAIL Threshold
BATT POWER_FAIL Threshold
Hysteresis
ACIN Threshold
ACIN Threshold Hysteresis
ACIN Input Bias Current
SWITCHING REGULATOR
DHI Off-Time
DHI Minimum Off-Time
DLOV Supply Current
Sense Voltage for Minimum
Discontinuous Mode Ripple
Current
Ref
0 < IREF < 500µA
REF falling
4.2023 4.2235 4.2447
V
3.1
3.9
V
VDCIN - VBATT, VDCIN falling
ACIN rising
VACIN = 2.048V
50
100 150
mV
100
200
300
mV
2.007 2.048 2.089
V
10
20
30
mV
-1
+1
µA
VBATT = 16.0V, VDCIN = 19V, VMODE = 3.6V
360
400
440
ns
VBATT = 16.0V, VDCIN = 17V, VMODE = 3.6V
260
300
350
ns
IDLOV DLO low
5
10
µA
7.5
mV
Cycle-by-Cycle Current-Limit
Sense Voltage
97
mV
Sense Voltage for Battery
Undervoltage Charge Current
MAX1909 only, BATT = 3.0V per cell
3
4.5
6
mV
Battery Undervoltage Threshold
DHIV Output Voltage
MAX1909 only, MODE = float (3 cell),
VBATT rising
MAX1909 only, MODE = LDO (4 cell),
VBATT rising
With respect to SRC
9.18
12.235
9.42
V
12.565
-4.5 -5.0 -5.5
V
4 _______________________________________________________________________________________
Share Link: 