Datasheet

MAX846A
MAX846A
Cost-Saving Multichemistry
Battery-Charger System
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ELECTRICAL CHARACTERISTICS (continued)
(V
DCIN
= 10V, ON = VL, I
VL
= I
VSET
= 0mA, V
CS
- = V
CS+
= 10V, V
BATT
= 4.5V, V
OFFV
= V
CELL2
= 0V, T
A
= 0°C to +85°C, unless
otherwise noted. Typical values are at T
A
= +25°C.)
V
BATT
= 10V, ON = GND, CELL2 = GND or VL
µA
0.01 1BATT Off Input Current
Current-Loop Set Point I
DRV
= 5mA, V
DRV
= 10V
V
BATT
= 10V, CELL2 = GND or VL
1mA < I
DRV
< 5mA
1.634 1.650 1.666 V
V
VSET
= 1.650V, V
CELL2
= VL, I
DRV
= 1mA,
V
DRV
= 10V
CA Voltage Gain 5
CONDITIONS
V/V
CCI Output Impedance 50 kΩ
Overcurrent Trip Level
When V
ISET
exceeds this voltage, DRV current
is disabled.
1.90 2.1 V
DRV Sink Current V
DRV
= 3V 20 mA
DRV Off Current V
DRV
= 20V, V
ON
= 0V 0.1 100
µA
225
µA
BATT Input Current
%
0.05Voltage-Loop Load Regulation
kΩ150CCV Output Impedance
V1.25 2.0VSET Common-Mode Input Range
Voltage-Loop Set Point
-0.25% 8.4 +0.25%
-0.25% 4.2 +0.25%
V
UNITSMIN TYP MAXPARAMETER
Input High Level CELL2, ON, OFFV 2.4 VL V
Input Low Level CELL2, ON, OFFV 0 0.8 V
Input Current CELL2, ON, OFFV 0.01 1
µA
PWROK Output Low Level I
PWROK
= 1mA, V
DCIN
= V
VL
= 2.5V 0.4 V
PWROK Output High Leakage V
PWROK
= 3.3V 0.01 1
µA
VOLTAGE LOOP
CURRENT LOOP
LOGIC INPUTS AND OUTPUTS
DRIVER
V
VSET
= 1.650V, V
CELL2
= 0V, I
DRV
= 1mA,
V
DRV
= 10V