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參數(shù)資料
| 型號： | SI9117 |
| 廠商： | Vishay Intertechnology,Inc. |
| 英文描述： | High-Frequency Converter for Telecom Applications |
| 中文描述： | 高頻轉(zhuǎn)換器的電信應(yīng)用 |
| 文件頁數(shù)： | 13/15頁 |
| 文件大小： | 132K |
| 代理商： | SI9117 |
Si9117
Vishay Siliconix
Document Number: 70027
S-40750—Rev. E, 19-Apr-04
www.vishay.com
13
OSC
V
C
1
2
3
R
SENSE
I
D
L
iL
V
OUT
iL
iDC
I
D
V
C
FIGURE 10.
Constant Frequency Current Mode Control
A
B
C
FIGURE 11.
Current Waveforms
FIGURE 12.
Current Sense Filtering Network
Layout Considerations
The main current loop flows from the input capacitor—through
the transformer, MOSFET, and sense resistor—and returns to
the capacitor. This current will have high rates of change and
associated fast voltage and current edges. It is essential to
avoid the injection of noise into the other circuitry.
To prevent this result, a “fishbone” type arrangement is
recommended (Figure 13). Designers are encouraged to
separate different grounds with “imaginary” dummy resistors.
These can be removed at a later stage. Main current loops
must be designed to be as short as possible: from C
IN
to the
transformer, through the MOSFET and Sense resistor, and
back into C
IN
. It is obvious that signals switching 50 V or 1 A
in 25 ns should not be mixed with signals that are controlling
a closed-loop, high-gain feedback system which is capable
of regulating the output voltage to less than 1 mV.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SI9117DY | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 1MHz HV Sw Mode Reg RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| SI9117DY-E3 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Hi Freq Converter For Telecom App RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| SI9117DY-T1 | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Hi Freq Converter For Telecom App RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| SI9117DY-T1-E3 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Hi Freq Converter For Telecom App RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| SI9118 | 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:Programmable Duty Cycle Controller |
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