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MAX8845Z Datasheet(PDF) 4 Page - Maxim Integrated Products

Part # MAX8845Z
Description  28V Linear Li Battery Chargers with Battery Detection and Overvoltage Protected Output
PDF  19 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX8845Z Datasheet(HTML) 4 Page - Maxim Integrated Products

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28V Linear Li+ Battery Chargers with Battery
Detection and Overvoltage Protected Output
4
_______________________________________________________________________________________
Typical Operating Characteristics
(VIN = 5V, VBATT = 4V, RPOK = RCHG = 200kΩ to 5V, EN = unconnected, RSETI = 2.8kΩ to GND, RMIN = 1.74kΩ to GND, RDETBAT =
4.7k
Ω to GND, CBATT = 2.2µF, TA = +25°C, unless otherwise noted.)
0
0.3
0.2
0.1
0.5
0.4
0.9
0.8
0.7
0.6
1.0
0
4
8
12
16
20
24
28
SUPPLY CURRENT
vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
VEN = 0,
IBATT = 0
VIN RISING
0
0.2
0.1
0.4
0.3
0.5
0.6
010
15
5
202530
DISABLED MODE SUPPLY CURRENT
vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
VEN = 5V
0
200
100
400
300
600
500
700
900
800
1000
0
1.0 1.5 2.0
0.5
2.5 3.0 3.5 4.0 4.5
CHARGE CURRENT
vs. BATTERY VOLTAGE
BATTERY VOLTAGE (V)
0
200
100
400
300
500
600
012
16
4
8
20
24
28
CHARGE CURRENT
vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
0
300
200
100
400
500
600
700
800
900
1000
0
200
100
300
400
500
600
CHARGE CURRENT
vs. INPUT VOLTAGE HEADROOM
VIN - VBATT (mV)
VBATT = 4V,
VIN RISING
0
1.5
1.0
0.5
2.5
2.0
4.5
4.0
3.5
3.0
5.0
0
4
8
1216202428
SAFEOUT OUTPUT VOLTAGE
vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
ISAFEOUT = 1mA
0
1.5
1.0
0.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
040
20
60
80
100
SAFEOUT OUTPUT VOLTAGE
vs. LOAD CURRENT
LOAD CURRENT (mA)
40
µs/div
STARTUP INTO PRECHARGE
IBATT
VIN
100mA/div
5V/div
5V/div
5V/div
MAX8845Z/Y/X/W toc08
VEN
VPOK
0
0
0
0
40
µs/div
SHUTDOWN
(FAST-CHARGE TO SHUTDOWN)
IBATT
VIN
500mA/div
5V/div
5V/div
5V/div
MAX8845Z/Y/X/W toc09
VEN
VPOK
0
0
0
0



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