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MPZ2012S221A 数据表(PDF) 22 Page - STMicroelectronics

部件名 MPZ2012S221A
功能描述  38 V, 10 W synchronous iso-buck converter for isolated applications
PDF  56 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

MPZ2012S221A 数据表(HTML) 22 Page - STMicroelectronics

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Figure 26. Secondary output efficiency vs. switching frequency (VIN = 12 V, VOUT_prim = 5 V, N = 6)
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0
0.05
0.1
0.15
0.2
0.25
0.3
Isolated output current [A]
fsw = 200 kHz
fsw = 400 kHz
fsw = 700 kHz
Selecting a lower switching frequency impacts however on the transformer size and on the ripple (see Figure 27)
requiring therefore a higher output capacitance to reduce it.
Figure 27. Isolated output voltage ripple vs. switching frequency (COUTiso = 10 µF)
L6983I
Efficiency
DS14040 - Rev 1
page 22/56



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