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| MAX1645B Datasheet, PDF (2/32 Pages) Maxim Integrated Products – Advanced Chemistry-Independent, Level 2 Battery Charger with Input Current Limiting | |||
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Advanced Chemistry-Independent, Level 2
Battery Charger 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 (VCSSP + 0.3V)
BST to LX..................................................................-0.3V to +6V
DHI to LX ...................................................-0.3V to (VBST + 0.3V)
CSIP, CSIN, BATT to GND .....................................-0.3V to +22V
LDO to GND .....................-0.3V to (lower of 6V or VDCIN + 0.3V)
DLO to GND ...........................................-0.3V to (VDLOV + 0.3V)
REF, DAC, CCV, CCI, CCS, CLS to GND.....-0.3V to (VLDO + 0.3V)
VDD, SCL, SDA, INT, DLOV to GND.........................-0.3V to +6V
THM to GND ...............................................-0.3V to (VDD + 0.3V)
PGND to GND .......................................................-0.3V to +0.3V
LDO Continuous Current.....................................................50mA
Continuous Power Dissipation (TA = +70°C)
28-Pin QSOP (derate 10.8mW/°C above +70°C).........860mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under âAbsolute Maximum Ratingsâ 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, VDD = +3.3V, VBATT = +16.8V, VDCIN = +18V, TA = 0°C to +85°C, unless otherwise noted. Typical values are at
TA = +25°C.)
PARAMETER
GENERAL SPECIFICATIONS
DCIN Typical Operating Range
DCIN Supply Current
DCIN Supply Current Charging
Inhibited
DCIN Undervoltage Threshold
LDO Output Voltage
VDD Input Voltage Range
VDD Undervoltage Threshold
VDD Quiescent Current
REF Output Voltage
BATT Undervoltage Threshold
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
SYMBOL
CONDITIONS
VDCIN
IDCIN
VLDO
IDD
VREF
8V < VDCIN < 28V
8V < VDCIN < 28V
When AC_PRESENT
switches
DCIN rising
DCIN falling
8V < VDCIN < 28V, 0 < ILDO < 15mA
8V < VDCIN < 28V (Note 1)
When the SMB
VDD rising
responds to commands VDD falling
0 < VDCIN < 6V, VDD = 5V, VSCL = 5V,
VSDA = 5V
0 < IREF < 200µA
When ICHARGE drops to 128mA (Note 2)
VPDS-OFF VCVS referred to VBATT, VCVS falling
VPDS-HYS VCVS referred to VBATT
IPDS = 0
PDS = CSSP
VPDS = VCSSP - 2V, VDCIN = 16V
VPDL-OFF VCVS referred to VBATT, VCVS rising
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
2.80
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
50
100 150
mV
100
200 300
mV
8
10
12
V
100
150
300
µA
10
50
mA
-150 -100 -50
mV
2 _______________________________________________________________________________________
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