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參數(shù)資料
| 型號： | AN-9008 |
| 廠商： | Fairchild Semiconductor Corporation |
| 元件分類： | 圓形連接器 |
| 英文描述： | Circular Connector; No. of Contacts:37; Series:MS27656; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Socket; Circular Shell Style:Wall Mount Receptacle RoHS Compliant: No |
| 中文描述： | 在一個反激變換器使用QFETs |
| 文件頁數(shù)： | 4/9頁 |
| 文件大小： | 124K |
| 代理商： | AN-9008 |
4
Rev D, July 2000
Table 2: Power Supply Specifications
This flyback converter was tested in rated conditions of 220VAC input voltage, 80kHz switching
frequency, and 60W output power.
Figure 4 shows the waveforms for rated operating conditions using the QFET(FQP7N60) as the
switching device. The QFET is driven by a gate-source voltage of 15V and the voltage spike
across the drain-source terminal is adequately clamped to about 500V by an additional clamp cir-
cuit during off-time.
Figure 4: Operating Waveforms at Rated Conditions (V
in
=220VAC, P
out
=60W)
1. Operating mode
2. Input voltage (V
in
)
3. Switching frequency (f
sw
)
4. Output voltage (V
out
)
:
:
:
:
Flyback Discontinuous Mode
180 VAC to 265 VAC (50Hz/60Hz)
80 kHz
A. 160V ± 5% 0.3A
B. 15V ± 5% 0.8A
75%
5. Efficiency (
η
)
:
Vgs(5V.div)
Id(1A/div)
Vds(250V/div)
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