Datasheet

Low-Cost Multichemistry Battery Chargers
ELECTRICAL CHARACTERISTICS (continued)
(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
V
CSIP
- V
CSIN
= 75mV -7.5 +7.5
V
CSIP
- V
CSIN
= 45mV -7.5 +7.5
ICHG Accuracy
V
CSIP
- V
CSIN
= 5mV -40 +40
%
INPUT-CURRENT REGULATION
CSSP-to-CSSN Full-Scale
Current-Sense Voltage
71.25 78.75 mV
V
CLS
= V
REF
-5 +5
V
CLS
= V
REF
/2 -7.5 +7.5
Input Current-Limit Accuracy
V
CLS
= 1.1V (MAX8765/MAX8765A only) -10 +10
%
Input Current-Limit Gain Error
(MAX8765/MAX8765A Only)
-2 +2 %
Input Current-Limit Offset
(MAX8765/MAX8765A Only)
-2 +2 mV
CSSP, CSSN Input Voltage
Range
8 28 V
V
DCIN
= 0V 1
CSSP, CSSN Input Current
(MAX1908/MAX8724 Only)
V
CSSP
= V
CSSN
= V
DCIN
> 8V 600
µA
V
DCIN
= 0V 1
CSSP Input Current
(MAX8765/MAX8765A Only)
V
CSSP
= V
CSSN
= 28V
V
DCIN
= 28V 650
µA
V
DCIN
= 0V 1
CSSN Input Current
(MAX8765/MAX8765A Only)
V
CSSP
= V
CSSN
= 28V
V
DCIN
= 28V 1
µA
CLS Input Range
(MAX1908/MAX8724 Only)
1.6 REF V
CLS Input Range
(MAX8765/MAX8765A Only)
1.1 REF V
IINP Transconductance
(MAX1908/MAX8724 Only)
G
IINP
V
CSSP
- V
CSSN
= 75mV 2.7 3.3 µA/mV
IINP Transconductance
(MAX8765/MAX8765A Only)
G
IINP
V
CSSP
- V
CCSN
= 75mV 2.785 3.225 µA/mV
IINP Transconductance Error
(MAX8765/MAX8765A Only)
-7.5 +7.5 %
IINP Transconductance Offset
(MAX8765/MAX8765A Only)
-12 +12 µA
V
CSSP
- V
CSSN
= 75mV -7.5 +7.5
IINP Accuracy
V
CSSP
- V
CSSN
= 37.5mV -7.5 +7.5
%
MAX1908/MAX8724/MAX8765/MAX8765A
8
Maxim Integrated