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MAX1874 Datasheet(PDF) 6 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) 6 Page - Maxim Integrated Products

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BATTERY TERMINATION VOLTAGE
vs. TEMPERATURE
TEMPERATURE (
°C)
65
50
20
35
-10
5
-25
4.16
4.17
4.18
4.19
4.20
4.21
4.22
4.23
4.24
4.25
4.15
-40
80
Dual-Input, USB/AC Adapter, 1-Cell
Li+ Charger with OVP and Thermal Regulation
6
_______________________________________________________________________________________
Typical Operating Characteristics
(VUSB = VDC = VDCLV = VEN = 5V, VBATT = 4.2V, VTHRM = VREF / 2, VDCI = VREF, VUSEL = 5V, Circuit of Figure 4, TA = +25°C,
unless otherwise noted.)
DC INPUT CURRENT
vs. DC INPUT VOLTAGE
VDC (V)
18
16
14
12
10
8
6
4
2
2
4
6
8
10
12
14
0
020
VUSB = 0
VBATT = 4.2V
VEN = 5V
INCLUDES R2 CURRENT
USB INPUT CURRENT
vs. USB INPUT VOLTAGE
VUSB (V)
6
5
34
2
1
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0
07
VEN = 5V, VDC FLOATING
INCLUDES R3 AND R4 CURRENTS
USB INPUT CURRENT
vs. USB INPUT VOLTAGE (VEN = 0)
VUSB (V)
6
5
34
2
1
0.2
0.4
0.6
0.8
1.0
1.2
1.4
0
07
VEN = 0
INCLUDES R3 AND R4 CURRENTS
CHARGE CURRENT
vs. DC INPUT-VOLTAGE HEADROOM
(VDC - VBATT) (V)
1.8
1.6
0.2 0.4 0.6
1.0 1.2
0.8
1.4
100
200
300
400
500
600
700
800
0
02.0
DCI SET FOR IBATT = 750mA
CHARGE CURRENT
vs. USB VOLTAGE HEADROOM
(VUSB - VBATT) (V)
1.8
1.6
0.2 0.4 0.6
1.0 1.2
0.8
1.4
100
200
300
400
500
600
0
02.0
CHARGE CURRENT vs. BATTERY VOLTAGE
(IBATT vs. VBATT)
VBATT (V)
4.5
4.0
3.0 3.5
1.0 1.5 2.0 2.5
0.5
100
200
300
400
500
600
700
800
900
1000
0
0
5.0
VEN = 5
VUSB = 0
IBATT = SET TO 750mA
VDC = VDCLV = 5V
CHARGE CURRENT vs. TEMPERATURE
WITH THERMAL REGULATION
TEMPERATURE (
°C)
0.2
0.4
0.6
0.8
1.0
1.2
0
-40 -25 -10 5
20 35 50 65 80 95 110 125
VDCI = VREF
VDC = 5V
VBATT = 3.9V
CHARGE CURRENT vs. VDCI
VDCI (V)
1.2
0
1.0
0.8
0.6
0.4
0.2
0
0.5
1.0
1.5
2.0
2.5
3.0


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