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參數(shù)資料
| 型號： | TDA4814A |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | POWER FACTOR CONTROLLER, PDIP14 |
| 封裝： | PLASTIC, DIP-14 |
| 文件頁數(shù)： | 6/17頁 |
| 文件大?。?/td> | 321K |
| 代理商： | TDA4814A |
Version 2.0
14
1 Jun 1996
TDA 4814
Discontinuous Operation Mode with Variable Frequency
The TDA 4814 A work 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.
It 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.
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