Ad va n c e d Ch e m is t ry-In d e p e n d e n t , Le ve l 2
Ba t t e ry Ch a rg e r w it h In p u t Cu rre n t Lim it in g
MAX1645
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V = +3.3V, V
= +16.8V, V
= +18V, T = 0°C to +85°C, unless otherwise noted. Typical values are at
DD
BATT
DCIN
A
T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
SDA Output Data Valid from SCL
t
1
µs
DV
Maximum Charge Period
Without a ChargingVoltage() or
Charging Current() Loaded
t
140
175
210
sec
WDT
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V = +3.3V, V
= +16.8V, V
= +18V, T = -40°C to +85°C, unless otherwise noted. Guaranteed by design.)
DD
BATT
DCIN A
PARAMETER
SYMBOL
CONDITIONS
MIN
MAX
UNITS
GENERAL SPECIFICATIONS
DCIN Typical Operating Range
DCIN Supply Current
V
8
28
6
V
DCIN
I
8V < V
< 28V
mA
DCIN
DCIN
DCIN Supply Current Charging
Inhibited
8V < V
< 28V
2
mA
DCIN
DCIN rising
DCIN falling
7.85
When AC_PRESENT
switches
DCIN Undervoltage Threshold
LDO Output Voltage
V
V
V
7
V
8V < V
< 28V, 0 < I
< 15mA
LDO
5.15
5.65
5.65
2.8
LDO
DCIN
V
DD
Input Voltage Range
8V < V
< 28V
2.8
2.1
DCIN
(Note 1)
V
rising
falling
DD
When the SMB res-
ponds to commands
V
Undervoltage Threshold
Quiescent Current
V
DD
V
DD
0 < V
< 6V, V = 5V, V
= 5V,
DCIN
DD
SCL
V
DD
I
DD
150
4.157
2.8
µA
V
V
SDA
= 5V
REF Output Voltage
V
REF
0 < I
< 200µA
4.035
2.4
REF
BATT Undervoltage Threshold
(Note 2)
When I
drops to 128mA
V
CHARGE
PDS Charging Source Switch
Turn-Off Threshold
V
V
referred to V
, V
falling
50
100
8
150
300
mV
mV
V
PDS-OFF
CVS
BATT CVS
PDS Charging Source Switch
Threshold Hysteresis
V
V
CVS
referred to V
= 0
PDS-HYS
BATT
PDS Output Low Voltage, PDS
Below CSSP
I
12
PDS
PDS Turn-On Current
PDS Turn-Off Current
PDS = CSSP
= V
100
10
300
µA
V
- 2V, V = 16V
DCIN
mA
PDS
CSSP
PDL Load Switch Turn-Off
Threshold
V
V
CVS
referred to V , V
BATT CVS
rising
-150
-50
mV
PDL-OFF
PDL Load Switch Threshold
Hysteresis
V
V
referred to V
100
6
300
mV
mA
PDL-HYS
CVS
BATT
PDL Turn-Off Current
V
CSSN
- V
= 1V
PDL
_______________________________________________________________________________________
5
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
