![](https://csdnimg.cn/release/download_crawler_static/4414206/bg6.jpg)
MAX1908/MAX8724/MAX8765/MAX8765A
Low-Cost Multichemistry Battery Chargers
6 _______________________________________________________________________________________
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
= 0°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
ERROR AMPLIFIERS
GMV Amplifier Transconductance GMV
V
V C T L
= V
LD O
, V
BAT T
= 16.8V ,
C E LLS = V
RE F IN
0.0625 0.125 0.2500 µA/mV
GMI Amplifier Transconductance GMI V
ICTL
= V
RE F IN
, V
CSIP
- V
CSIN
= 75mV 0.5 1 2.0 µA/mV
GMS Amplifier Transconductance GMS V
CLS
= V
REF
, V
CSSP
- V
CSSN
= 75mV 0.5 1 2.0 µA/mV
CCI, CCS, CCV Clamp Voltage 0.25V < V
CCV,CCS,CCI
< 2V 150 300 600 mV
LOGIC LEVELS
CELLS Input Low Voltage 0.4 V
CELLS Input Open Voltage CELLS = open
(V
REFIN
/2) -
0.2V
V
R E F IN
/
2
( V
R E F IN
/2) +
0.2V
V
CELLS Input High Voltage
V
REFIN
- 0.4V
V
CELLS Input Bias Current CELLS = 0V or V
RE F IN
-2 +2 µA
ACOK AND SHDN
ACOK Input Voltage Range 0 28 V
ACOK Sink Current V
A COK
= 0.4V, V
ACIN
= 3V 1 mA
ACOK Leakage Current V
A COK
= 28V, V
ACIN
= 0V 1 µA
SHDN Input Voltage Range 0 LDO V
V
SHDN
= 0V OR V
LDO
-1 +1
SHDN Input Bias Current
V
SHDN
= 0V OR V
SHDN
= 5V -1 +1
µA
SHDN Threshold V
S HDN
falling 22 23.5 25
% of
V
REFIN
SHDN Threshold Hysteresis 1
% of
V
REFIN