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參數(shù)資料
| 型號(hào)： | TDA4817 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | POWER FACTOR CONTROLLER, 50 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | PLASTIC, DIP-8 |
| 文件頁(yè)數(shù)： | 3/15頁(yè) |
| 文件大?。?/td> | 362K |
| 代理商： | TDA4817 |
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Version 2.0
11
1 May 1995
Discontinuous Operation Mode with Variable Frequency
The TDA 4817 works in a discontinuous operation mode with variable frequency.
The principle of a freely oscillating controller exploits the physical relationship between current and
voltage at the boost converter choke. The current in the semiconductors flows in a triangular shape.
This is only when the current in the boost converter diode has gone to zero that the transistor goes
conductive. This arrangement does away with the diode’s power-squandering reverse currents.
If triangular currents flow continuously through the boost converter choke the input current
averaged over a high-frequency period is exactly half the peak of the high-frequency choke current.
If the peak values of the choke current are located along an envelope curve that is proportional to
a sinusoidal low- frequency input voltage, the input current available after smoothing in an RFI filter
is sinusoidal.
TDA 4817
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| TDA4817G | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:Power Factor Controller IC for High Power Factor and Active Harmonic Filtering |
| TDA4820 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| TDA4820T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Sync separation circuit for video applications |
| TDA4821P | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Autosize IC for colour monitors |
| TDA4841 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:I2C-bus autosync deflection controller for PC monitors |
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