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MAX1874 Datasheet(PDF) 2 Page - Maxim Integrated Products

Part No. MAX1874
Description  Dual-Input, USB/AC Adapter, 1-Cell Li Charger with OVP and Thermal Regulation
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX1874 Datasheet(HTML) 2 Page - Maxim Integrated Products

 
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Dual-Input, USB/AC Adapter, 1-Cell
Li+ Charger with OVP and Thermal Regulation
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VUSB = VDC = VDCLV = VEN = VUSEL = 5V, VBATT = 4.2V, VTHRM = VREF / 2, Circuit of Figure 2, TA = 0°C to +85°C, unless otherwise
noted. Typical values are at TA = +25°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.
DC, DCOK to GND .................................................-0.3V to +20V
DCLV, BYP, USB, UOK, DCI, REF, USEL, THRM,
EN, BATT, CHG, PON to GND .............................-0.3V to +7V
PGND to GND .......................................................-0.3V to +0.3V
Continuous Current (DCLV) ..................................................1.1A
Continuous Current (USB) ....................................................0.6A
Continuous Power Dissipation (TA = +70°C)
16-Pin 5mm 5mm Thin QFN
(derate 21.3mW/°C above +70°C) ...................................1.7W
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Maximum Junction Temperature .....................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
INPUT VOLTAGE RANGES AND INPUT CURRENT
Maximum DC Input Voltage with
Overvoltage Protection
Q2 input MOSFET must be in place; charging
occurs only below 6.2V, Figures 3, 4, and 5
18
V
Maximum DC Input Voltage Without
Overvoltage Protection
DC = DCLV, Q2 input MOSFET not on circuit,
Figure 2
6.5
V
Maximum Input Voltage for Charging
6.0
6.2
6.5
V
VEN = 0V
2
4
DC Supply Current
VEN = 5V
4
6
mA
DCLV Operating Voltage Range
4.35
6.00
V
DCLV Shutdown Supply Current
VEN = 0V
300
500
µA
USB Input Voltage Range
4.35
6.50
V
VEN = 0V
500
750
µA
VEN = 5V, VDC = 0V
2
3
mA
USB Supply Current
VEN = 5V, VDC = 5V
160
300
µA
DCI Input Current
1
100
nA
BYP Output Resistance
(Note 1)
5
THRM Input Bias Current
1
100
nA
BATTERY VOLTAGE
BATT Regulation Voltage
4.1685
4.20
4.2315
V
BATT Prequal Voltage Threshold
BATT rising
2.8
3
3.2
V
Prequal Threshold Hysteresis
70
mV
IUSB = 100mA
100
USB Charging Headroom
IUSB = 500mA
200
mV
DC Charging Headroom
IDCIN = 800mA
250
mV
REF Voltage (Buffered Output)
IREF = 0 to 500µA, 4V < VDC or VUSB < 6.5V;
does not affect BATT regulation accuracy
2.94
3
3.06
V


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