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L6982 数据表(PDF) 31 Page - STMicroelectronics

部件名 L6982
功能描述  38 V, 2 A synchronous step-down converter with low quiescent current
PDF  48 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L6982 数据表(HTML) 31 Page - STMicroelectronics

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10
Efficiency curves
The following three figures the efficiency and power losses acquired on the standard evaluation board of the
device, selecting the following output filter:
•
COUT:
–
1 x GRJ32EC71E226KE11 22 µF 25 V (Murata)
–
2 x C3216X7R1H106K160AC 10 µF 50 V (TDK)
•
Inductor:
–
MSS1038T-223ML (Coilcraft)
•
C8:
–
10 pF
Figure 33. Efficiency VIN = 24 V; VOUT = 5 V; FSW = 0.4 MHZ
IOUT [A]
VIN = 24 [V]; VOUT = 5 [V]; F SW = 400 [KHz]
0
10
20
30
40
50
60
70
80
90
100
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
LNM
LCM
Figure 34. Efficiency VIN = 24 V; VOUT = 5 V; FSW = 0.4 MHZ (log scale)
IOUT [A]
VIN = 24 [V]; VOUT = 5 [V]; F SW = 400 [KHz]
0
10
20
30
40
50
60
70
80
90
100
0.0001
0.001
0.01
0.1
1
LNM
LCM
L6982
Efficiency curves
DS13683 - Rev 1
page 31/48



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