低成本,多种化学电池 -
充电器积木
MAX1772
典型工作特性(续)
图1a的(电路,V
DCIN
= 20V ,T
A
= + 25 ℃,除非另有说明。 )
LDO线性调整率
MAX1772 toc05
REF电压负载调节
MAX1772 toc06
REF电压误差与温度
0.4
0.3
REF电压误差( % )
0.2
0.1
0
-0.1
-0.2
-0.3
V
ICTL
= 0V
V
VCTL
= 0V
空载
V
REF
= 4.096V
MAX1772 toc07
1.0
0.8
0.6
0.4
LDO的误差(%)
V
LDO
= 5.40V
0.20
0.15
0.10
REF误差(%)
0.05
0
-0.05
-0.10
-0.15
-0.20
V
VCTL
= 0V
V
ICTL
= 3.3V
CELL = 4
V
REF
= 4.096V
0.5
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
8
12
16
20
24
28
DCIN ( V)
-0.4
-0.5
0
50 100 150 200 250 300 350 400 450 500
REF电流( μA )
-40
-15
10
35
60
85
温度(℃)
效率与电池电流
(电压控制回路)
90
80
效率(%)
70
60
50
40
30
20
10
0
0.1
1
10
100
1000
10,000
BATT电流(mA)
V
VCTL
= 0V
V
ICTL
= 3.3V
V
REFIN
= 3.3V
CELL = 4
CELL = 3
CELL = 2
MAX1772 toc08
效率与电池电流
(电流控制回路)
90
80
效率(%)
70
60
50
40
30
20
10
0
100
1000
BATT电流(mA)
10,000
V
VCTL
= 0V
V
ICTL
= 3.3V
V
REFIN
= 3.3V
CELL = 3
CELL = 4
CELL = 2
MAX1772 toc09
100
100
8
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