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參數(shù)資料
| 型號(hào)： | AN701 |
| 廠商： | Vishay Intertechnology,Inc. |
| 英文描述： | Designing High-Frequency DC-to-DC Converters With the Si9114A Switchmode Controller |
| 中文描述： | 設(shè)計(jì)高頻型DC - DC轉(zhuǎn)換器隨著Si9114A開(kāi)關(guān)模式控制器 |
| 文件頁(yè)數(shù)： | 19/20頁(yè) |
| 文件大?。?/td> | 1113K |
| 代理商： | AN701 |
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AN701
Vishay Siliconix
Document Number: 70575
16-Jan-01
www.vishay.com
19
Therefore
N
P
N
S
1
0.35
2.86
The primary turns can be derived from the same equation used
for the forward converter output indicator:
N
min
L
P
x I
pK
B
max
x A
min
N
min
14 Turns.
12 H x 3 A
200 mT x 13 mm
2
13.85 Turns.
For 5 V, the number of turns will then be:
N
S
N
p
x 0.35
14 x 0.35
4.9 T
5 T
In the flyback converter, all windings appear in parallel with
each other, and will track the voltage of the controlled output.
Small variations will be present due to the differences between
Schottky and bipolar rectifiers. It must also be remembered
that this will also cause the bias winding to collapse under short
circuit conditions with possible overpower dissipation.
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