MAX1645 Datasheet, PDF (2/32 Pages) Maxim Integrated Products – Advanced Chemistry-Independent, Level 2 Battery Chargers with Input Current Limiting

Advanced Chemistry-Independent, Level 2
Battery Chargers with Input Current Limiting
ABSOLUTE MAXIMUM RATINGS
DCIN, CVS, CSSP, CSSN, LX to GND....................-0.3V to +30V
CSSP to CSSN, CSIP to CSIN ...............................-0.3V to +0.3V
PDS, PDL to GND ...................................-0.3V to (V_CSSP + 0.3V)
BST to LX..................................................................-0.3V to +6V
DHI to LX ...................................................-0.3V to (V_BST + 0.3V)
CSIP, CSIN, BATT to GND .....................................-0.3V to +22V
LDO to GND .....................-0.3V to (lower of 6V or V_DCIN + 0.3V)
DLO to GND ...........................................-0.3V to (V_DLOV + 0.3V)
REF, DAC, CCV, CCI, CCS, CLS to GND.....-0.3V to (V_LDO + 0.3V)
V_DD, SCL, SDA, INT, DLOV to GND.........................-0.3V to +6V
THM to GND ...............................................-0.3V to (V_DD + 0.3V)
PGND to GND .......................................................-0.3V to +0.3V
LDO Continuous Current.....................................................50mA
Continuous Power Dissipation (T_A = +70°C)
28-Pin QSOP (derate 10.8mW/°C above +70°C).........860mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature.........................................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(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
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)
SYMBOL
CONDITIONS
V_DCIN
I_DCIN
V_LDO
I_DD
V_REF
8V < V_DCIN < 28V
8V < V_DCIN < 28V
When AC_PRESENT
switches
DCIN rising
DCIN falling
8V < V_DCIN < 28V, 0 < I_LDO < 15mA
8V < V_DCIN < 28V
When the SMB res- ^VDD ^rising
ponds to commands _{VDD falling}
0 < V_DCIN < 6V, V_DD = 5V, V_SCL = 5V,
V_SDA = 5V
0 < I_REF < 200µA
When I_CHARGE drops to 128mA
MIN TYP MAX UNITS
8
28
V
1.7
6
mA
0.7
2
mA
7.5
7.85
V
7
7.4
5.15
5.4
5.65
V
2.8
5.65
V
2.55
2.8
V
2.1
2.5
80
150
µA
4.066 4.096 4.126
V
2.4
2.8
V
PDS Charging Source Switch
Turn-Off Threshold
V_PDS-OFF V_CVS referred to V_BATT, V_CVS falling
50
100
150
mV
PDS Charging Source Switch
Threshold Hysteresis
V_PDS-HYS V_CVS referred to V_BATT
100
200
300
mV
PDS Output Low Voltage, PDS
Below CSSP
PDS Turn-On Current
PDS Turn-Off Current
PDL Load Switch Turn-Off
Threshold
I_PDS = 0
PDS = CSSP
V_PDS = V_CSSP - 2V, V_DCIN = 16V
V_PDL-OFF V_CVS referred to V_BATT, V_CVS rising
8
10
12
V
100
150
300
µA
10
50
mA
-150 -100
-50
mV
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