LTC1558-5 Просмотр технического описания (PDF) - Linear Technology
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LTC1558-5 Datasheet PDF : 20 Pages
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LTC1558-3.3/LTC1558-5
TYPICAL PERFORMANCE CHARACTERISTICS
Output Power vs Battery Voltage
150
VCC = 5V (LTC1558-5)
VBAK = 6V
125
100
75
50
25
0
1.0
1.1
1.2
1.3
1.4
NiCd TERMINAL VOLTAGE (V)
1558 G01
Boost Converter Switching
Duty Cycle
100
80
60
40
20 VBATT = 1.2V
VCC = 3.3V (LTC1558-3.3)
IPK = 330mA
0
2
4
6
8
OUTPUT VOLTAGE, VBAK (V)
10
1558 G04
Fast Recharge Time (Assume
Fully Exhausted NiCd Battery)
60
50
40
30
20
10
0
64
128
256
512
BATTERY CAPACITY (mAHr)
1558 G07
Backup Time vs Battery Capacity
3.0
VBATT = 1.2V
VBAK = 6V
2.5 POUT = 100mW
2.0
1.5
1.0
0.5
0
0
125
250
375
500
NiCd CELL CAPACITY (mAHr)
1558 G02
Trickle Charge Multiplier Factor
10.5
VBATT = 1.2V
10.0
9.5
9.0
8.5
8.0
7.5
0.05
0.1
1
2
NiCd BATTERY TRICKLE CURRENT (mA)
1558 G05
RESET Output Voltage
vs Supply Voltage
6
VCC = 5V (LTC1558-5)
5
4
3
2
1
4.7V
4.55V
0
0
1
2
3
4
56
SUPPLY VOLTAGE (V)
1558 G08
Boost Converter Switching
Frequency
125
VBATT = 1.2V
VCC = 3.3V (LTC1558-3.3)
100 IPK = 330mA
75
50
25
0
2
4
6
8
10
OUTPUT VOLTAGE, VBAK (V)
1558 G03
Normalized Fast Recharge
Current vs Temperature
1.005
1.000
0.995
0.990
0.985
0.980
0.975
0.970
0.965
0.960
0.955
0.950
0
25
50
TEMPERATURE (°C)
75
1558 G06
RESET Output Voltage
vs Supply Voltage
3.5
VCC = 3.3V (LTC1558-3.3)
3.0
2.5
2.0
1.5
1.0
0.5
0
0
3.10V
3V
1
2
3
SUPPLY VOLTAGE (V)
4
1558 G09
4
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