MAX8845Z Просмотр технического описания (PDF) - Maxim Integrated
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производитель
MAX8845Z
Maxim Integrated
MAX8845Z Datasheet PDF : 19 Pages
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28V Linear Li+ Battery Chargers with Battery
Detection and Overvoltage Protected Output
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 =
4.7kΩ to GND, CBATT = 2.2µF, TA = +25°C, unless otherwise noted.)
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
SUPPLY CURRENT
vs. INPUT VOLTAGE
VEN = 0,
IBATT = 0
VIN RISING
4 8 12 16 20 24 28
INPUT VOLTAGE (V)
DISABLED MODE SUPPLY CURRENT
vs. INPUT VOLTAGE
0.6
VEN = 5V
0.5
0.4
0.3
0.2
0.1
0
0 5 10 15 20 25 30
INPUT VOLTAGE (V)
CHARGE CURRENT
vs. BATTERY VOLTAGE
1000
900
800
700
600
500
400
300
200
100
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
BATTERY VOLTAGE (V)
CHARGE CURRENT
vs. INPUT VOLTAGE
600
500
400
300
200
100
0
0 4 8 12 16 20 24 28
INPUT VOLTAGE (V)
SAFEOUT OUTPUT VOLTAGE
vs. LOAD CURRENT
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
20
40
60
80 100
LOAD CURRENT (mA)
1000
900
800
700
600
500
400
300
200
100
0
0
CHARGE CURRENT
vs. INPUT VOLTAGE HEADROOM
VBATT = 4V,
VIN RISING
100 200 300 400 500 600
VIN - VBATT (mV)
STARTUP INTO PRECHARGE
MAX8845Z/Y/X/W toc08
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
SAFEOUT OUTPUT VOLTAGE
vs. INPUT VOLTAGE
ISAFEOUT = 1mA
4 8 12 16 20 24 28
INPUT VOLTAGE (V)
SHUTDOWN
(FAST-CHARGE TO SHUTDOWN)
MAX8845Z/Y/X/W toc09
IBATT
VIN
VEN
VPOK
100mA/div IBATT
0
5V/div
VIN
0
5V/div
VEN
0
5V/div
0
VPOK
500mA/div
0
5V/div
0
5V/div
0
5V/div
0
40µs/div
40µs/div
4 _______________________________________________________________________________________
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