Datasheet

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
= -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
CHARGE-VOLTAGE REGULATION
V
VCTL
= V
REFIN
-0.6 +0.6
V
VCTL
= V
REFIN
/20 -0.6 +0.6
Battery Regulation Voltage
Accuracy (2, 3, or 4 Cells)
V
VCTL
= V
LDO
-0.6 +0.6
%
REFIN Range (Note 1) 2.5 3.6 V
REFIN Undervoltage Lockout V
REFIN
falling 1.92 V
CHARGE CURRENT REGULATION
CSIP-to-CSIN Full-Scale Current-
Sense Voltage
V
ICTL
= V
REFIN
70.5 79.5 mV
V
ICTL
= V
REFIN
-6 +6
V
ICTL
= V
REFIN
x 0.6 -7.5 +7.5
V
ICTL
= V
LDO
-7.5 +7.5
MAX8765/MAX8765A only; V
ICTL
= V
REFIN
x
0.036
-50 +50
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
BATT/CSIP/CSIN Input Voltage
Range
0 19 V
V
DCIN
= 0V or V
ICTL
= 0V or V
SHDN
= 0V 1
CSIP/CSIN Input Current
Charging 650
µA
Cycle-by-Cycle Maximum Current
Limit
I
MAX
RS2 = 0.015Ω 6.0 7.5 A
ICTL Power-Down Mode
Threshold Voltage
(MAX1908/MAX8724 Only)
V
ICTL
rising
REFIN/
100
REFIN/
33
V
ICHG Transconductance
(MAX1908/MAX8724 Only)
G
ICHG
V
CSIP
- V
CSIN
= 45mV 2.7 3.3 µA/mV
ICHG Transconductance
(MAX8765/MAX8765A Only)
G
ICHG
V
CSIP
- V
CSIN
= 45mV 2.785 3.225 µA/mV
ICHG Transconductance Error
(MAX8765/MAX8765A Only)
-7.5 +7.5 %
ICHG Transconductance Offset
(MAX8765/MAX8765A Only)
-6.5 +6.5 µA
Low-Cost Multichemistry Battery Chargers
Maxim Integrated
7
MAX1908/MAX8724/MAX8765/MAX8765A