MAX8731 Просмотр технического описания (PDF) - Maxim Integrated
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MAX8731 Datasheet PDF : 32 Pages
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SMBus Level 2 Battery Charger with
Remote Sense
Typical Operating Characteristics (continued)
(Circuit of Figure 1, adapter = 19.5V, ChargeVoltage() = 16.8V, ChargeCurrent() = 3.854A, InputCurrent() = 3.584A, TA = +25°C,
unless otherwise noted.)
CHARGE-VOLTAGE ERROR
vs. CHARGE-VOLTAGE SETTING
0.6
BATTERY-VOLTAGE ERROR
vs. CHARGE CURRENT
0.3
0.4
0.2
0.2
0.1
2 CELLS
0.0
0.0
-0.2
-0.1
4 CELLS
-0.4
-0.6
4
8
12
16
20
CHARGE-VOLTAGE SETTING (V)
-0.2
3 CELLS
-0.3
0123456
CHARGE CURRENT (A)
BATTERY REMOVAL
MAX8731 toc12
VOUT OUTPUT CAPACITOR = 10µF
13.5V
13.0V
12.5V
VOUT OUTPUT CAPACITOR = 22µF
ChargeVoltage( ) = 12.6V
20µs/div
LOAD
CURRENT
ADAPTER
CURRENT
INDUCTOR
CURRENT
CCS VOLTAGE
500 mV/div
CCI VOLTAGE
500 mV/div
SYSTEM LOAD TRANSIENT
MAX8731toc13
5A
0A
CCI
CCS
200µs/div
5A
0A
5A
0A
CCS
500mV/div
500mV/div
CCI
EFFICIENCY vs. CHARGE CURRENT
100
95
90
3 CELLS
4 CELLS
85
2 CELLS
80
75
70
65
60
0
2
4
6
8
CHARGE CURRENT (A)
0
-5
-10
-15
-20
-25
-30
-35
-40
0
LDO LOAD REGULATION
CHARGER OFF
20
40
60
80
100
ILDO (mA)
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