Datasheet

Low-Cost Multichemistry Battery Chargers
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DCIN
= V
CSSP
= V
CSSN
= 18V, V
BATT
= V
CSIP
= V
CSIN
= 12V, V
REFIN
= 3V, V
VCTL
= V
ICTL
= 0.75 x V
REFIN
, CELLS = open, CLS =
REF, V
BST
- V
LX
= 4.5V, ACIN = GND = PGND = 0, C
LDO
= 1µF, LDO = DLOV, C
REF
= 1µF; CCI, CCS, and CCV are compensated
per Figure 1a; 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, CSSP, CSSN, ACOK to GND.......................-0.3V to +30V
BST to GND ............................................................-0.3V to +36V
BST to LX..................................................................-0.3V to +6V
DHI to LX...................................................-0.3V to (V
BST
+ 0.3V)
LX to GND .................................................................-6V to +30V
BATT, CSIP, CSIN to GND .....................................-0.3V to +20V
CSIP to CSIN or CSSP to CSSN or
PGND to GND ....................................................-0.3V to +0.3V
CCI, CCS, CCV, DLO, ICHG,
IINP, ACIN, REF to GND.......................-0.3V to (V
LDO
+ 0.3V)
DLOV, VCTL, ICTL, REFIN, CELLS, CLS,
LDO, SHDN to GND .............................................-0.3V to +6V
DLOV to LDO.........................................................-0.3V to +0.3V
DLO to PGND .........................................-0.3V to (V
DLOV
+ 0.3V)
LDO Short-Circuit Current...................................................50mA
Continuous Power Dissipation (T
A
= +70°C)
28-Pin Thin QFN (5mm × 5mm)
(derate 20.8mW/°C above +70°C) .........................1666.7mW
Operating Temperature Range ..........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
CHARGE-VOLTAGE REGULATION
V
VCTL
= V
REFIN
-0.5 +0.5
V
VCTL
= V
REFIN
/20 -0.5 +0.5
Battery-Regulation Voltage
Accuracy
(MAX1908/MAX8724/MAX8765
(2, 3, or 4 Cells) and MAX8765A
(4 Cells Only))
V
VCTL
= V
LDO
-0.5 +0.5
%
V
VCTL
= V
REFIN
-0.4 +0.4
V
VCTL
= V
REFIN
/20 -0.4
+0.4
Battery-Regulation Voltage
Accuracy (MAX8765A, 2 or 3
Cells Only)
V
VCTL
= V
LDO
-0.4
+0.4
%
VCTL Default Threshold V
VCTL
rising 4.0 4.1 4.2 V
REFIN Range (Note 1) 2.5 3.6 V
REFIN Undervoltage Lockout V
REFIN
falling 1.20 1.92 V
CHARGE-CURRENT REGULATION
CSIP-to-CSIN Full-Scale Current-
Sense Voltage
V
ICTL
= V
REFIN
71.25 75 78.75 mV
V
ICTL
= V
REFIN
-5 +5
V
ICTL
= V
REFIN
x 0.6 -5 +5
V
ICTL
= V
LDO
-6 +6
MAX8765/MAX8765A only; V
ICTL
= V
REFIN
x
0.036
-45 +45
Charging-Current Accuracy
MAX8724 only; V
ICTL
= V
REFIN
x 0.058 -33 +33
%
Charge-Current Gain Error
(MAX8765/MAX8765A Only)
-2 +2 %
Charge-Current Offset
(MAX8765/MAX8765A Only)
-2 +2 mV
ICTL Default Threshold V
ICTL
rising 4.0 4.1 4.2 V
BATT/CSIP/CSIN Input Voltage
Range
0 19 V
MAX1908/MAX8724/MAX8765/MAX8765A
2
Maxim Integrated