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