Datasheet

MAX846A
Cost-Saving Multichemistry
Battery-Charger System
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(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.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
DCIN, DRV, CS+, CS-, BATT to GND........................-0.3V, +21V
PGND to GND.....................................................................±0.3V
VL to GND......................................................................-0.3V, 7V
I
PWROK
................................................................................10mA
PWROK, ISET, CCI, CCV, OFFV, VSET,
CELL2, ON to GND............................................-0.3V, VL + 0.3V
CS+ to CS-..........................................................................±0.3V
VL Short to GND.........................................................Continuous
I
DRV
...................................................................................100mA
Continuous Power Dissipation (T
A
= +70°C)
QSOP (derate 8.3mW/°C above +70°C)........................667mW
Operating Temperature Range
MAX846AEEE ....................................................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10sec).............................+300°C
Measured at VSET, I
VSET
= 0mA, V
ON
= 0V
Rising VL edge, 2% hysteresis
VL = GND
0mA < I
VL
< 20mA, 3.7V < V
DCIN
< 20V
CONDITIONS
V-0.5% 1.650 +0.5%
V2.5 2.9VL Undervoltage-Lockout Level
V2.9 3.0 3.1PWROK Trip Level
mA50Short-Circuit Current Limit
V3.267 3.305 3.333Output Voltage
V3.7 20.0Operating Range
UNITSMIN TYP MAXPARAMETER
Output Voltage
kΩ-2% 20 +2%Output Resistance
Transconductance V
ISET
= 1.7V, V
CS+
- V
CS-
= 165mV 0.95 1 1.05 mA/V
Output Offset Current V
CS+
= 4V 3
µA
Input Common-Mode Range Measured at V
CS-
, V
CS+
- V
CS-
= 165mV 2.1 20.0 V
Maximum Differential Input Voltage
V
CS-
= V
ISET
= 2.1V,
CSA transconductance >0.9mA/V
225 mV
CS- Lockout Voltage
When V
CS-
is less than this voltage, DRV is
disabled.
1.9 2.1 V
CS+, CS- Input Current V
CS+
= 20V, V
CS+
-V
CS-
= 165mV 250
µA
CS+, CS- Off Input Current DCIN = VL = ON = GND 0.01 10
µA
V
DCIN
= 20V, I
DRV
= I
VL
= 0mA mA5DCIN Supply Current
VL REGULATOR
REFERENCE
CURRENT-SENSE AMPLIFIER