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A6986I датащи(PDF) 40 Page - STMicroelectronics

номер детали A6986I
подробное описание детали  Automotive 38 V, 5 W synchronous iso-buck converter for isolated applications
PDF  62 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

A6986I датащи(HTML) 40 Page - STMicroelectronics

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Figure 44. Secondary winding positive peak current dependency on duty cycle (IOUT_sec = 100 mA)
0
0.5
1
1.5
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2.5
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
Duty cycle
Figure 45. Primary negative peak current dependency on duty cycle (VOUT_pri = 5 V, IOUT_pri = 0, IOUT_sec =
100 mA, N = 6, fSW = 500 kHz, L = 19 µH)
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
0.1
0.2
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Duty cycle
Reverse current
limit already
triggered
typ. reverse current
limit threhsold
Windings resistance
Winding resistances should be minimized as much as possible since they affect the secondary output load
regulations. They also contribute to power losses, therefore affecting the efficiency of the total solution.
Leakage inductance
The leakage inductance of a transformer can be defined as an undesired inductive component due to the not
perfect magnetic linking of the two windings. Leakage inductance is inherent to the transformer construction and
can only be reduced but not eliminated.
A6986I
Design of the external components
DS13481 - Rev 2
page 40/62



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