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AN1723 датащи(PDF) 7 Page - STMicroelectronics

номер детали AN1723
подробное описание детали  Designing with the L5973AD high efficiency DC-DC converter
PDF  24 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN1723 датащи(HTML) 7 Page - STMicroelectronics

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AN1723
Application information
Doc ID 9553 Rev 4
7/24
The following points are analyzed:
●
Component selection
●
Closing the loop
●
Board layout
–
Thermal considerations
–
Short-circuit protection
●
Application ideas.
Figure 8.
Junction temperature vs. output
current at VIN = 5 V
Figure 9.
Junction temperature vs. output
current at VIN = 12 V
20
30
40
50
60
70
80
90
100
0.2
0.4
0.6
0.8
11.2
1.4
1.6
1.8
2
Io(A)
Tj(°C)
Vo=2.5
Vo=3.3V
Vo=1.8V
Vin=5V
Tamb=25°C
20
30
40
50
60
70
80
90
100
0.2
0.4
0.6
0.8
11.2
1.4
1.6
1.8
2
Io(A)
Tj(°C)
Vo=2.5
Vo=3.3V
Vo=1.8V
Vin=5V
Tamb=25°C
AM11316v
AM11317v1
Tj( C)
20
30
40
50
60
70
80
90
100
110
0.2
0.4
0.6
0.8
11.2
1.4
1.6
1.8
2
Vin=12V
Tamb=25°C
Vo=3.3V
Vo=5V
Vo=2.5V
20
30
40
50
60
70
80
90
100
110
0.2
0.4
0.6
0.8
11.2
1.4
1.6
1.8
2
Vin=12V
Tamb=25°C
Vo=3.3V
Vo=5V
Vo=2.5V
Tj(°C)
Figure 10.
Efficiency vs. output current at
VIN = 5 V
Figure 11.
Efficiency vs. output current at
VIN = 12 V
AM11318v1
65
70
75
80
85
90
95
0.2
0.4
0.6
0.8
11.2
1.4
1.6
1.8
2
Io(A)
Vin=5V
Vout=2.5V
Vout=3.3V
Vout=1.8V
65
70
75
80
85
90
95
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Io(A)
Vin=5V
Vout=2.5V
Vout=3.3V
Vout=1.8V
AM11319v1
65
70
75
80
85
90
95
0.20.4
0.60.8
1
1.2
1.4
1.6
1.8
2
Io(A)
Vin=12V
Vout=3.3V
Vout=2.5V
Vout=5V
65
70
75
80
85
90
95
0.2
0.4
0.6
0.8
11.2
1.4
1.6
1.8
2
Io(A)
Vin=12V
Vout=3.3V
Vout=2.5V
Vout=5V



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