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參數(shù)資料
| 型號： | L6562A |
| 廠商： | 意法半導體 |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Transition-mode PFC controller |
| 中文描述： | 過渡模式PFC控制器 |
| 文件頁數(shù)： | 11/20頁 |
| 文件大?。?/td> | 343K |
| 代理商： | L6562A |
L6562A
Application information
11/20
Figure 3.
THD optimization: standard TM PFC controller (left side) and L6562A
(right side)
To overcome this issue the circuit embedded in the device forces the PFC pre-regulator to
process more energy near the line voltage zero-crossings as compared to that commanded
by the control loop. This will result in both minimizing the time interval where energy transfer
is lacking and fully discharging the high-frequency filter capacitor after the bridge. The effect
of the circuit is shown in figure 2, where the key waveforms of a standard TM PFC controller
are compared to those of the L6562A.
Essentially, the circuit artificially increases the ON-time of the power switch with a positive
offset added to the output of the multiplier in the proximity of the line voltage zero-crossings.
This offset is reduced as the instantaneous line voltage increases, so that it becomes
negligible as the line voltage moves toward the top of the sinusoid.
To maximally benefit from the THD optimizer circuit, the high-frequency filter capacitor after
the bridge rectifier should be minimized, compatibly with EMI filtering needs. A large
capacitance, in fact, introduces a conduction dead-angle of the AC input current in itself -
even with an ideal energy transfer by the PFC pre-regulator - thus making the action of the
optimizer circuit little effective.
Input current
Input current
Input current
Input current
MOSFET's drain voltage
MOSFET's drain voltage
Rectified mains voltage
Rectified mains voltage
相關PDF資料 |
PDF描述 |
|---|---|
| L6562AD | Transition-mode PFC controller |
| L6562ADTR | Transition-mode PFC controller |
| L6562AN | Transition-mode PFC controller |
| L6563_07 | Advanced transition-mode PFC controller |
| L6563A | ADVANCED TRANSITION-MODE PFC CONTROLLER |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| L6562A_0708 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Transition-mode PFC controller |
| L6562AD | 功能描述:開關變換器、穩(wěn)壓器與控制器 Transition Mode PFC Controller 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 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| L6562ADTR | 功能描述:功率因數(shù)校正 IC HV H-Bridge driver RoHS:否 制造商:Fairchild Semiconductor 開關頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| L6562ADTR☞原裝☜ | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:深創(chuàng)輝科技，全新原裝L6562ADTR☞原裝☜ |
| L6562AN | 功能描述:功率因數(shù)校正 IC Low 2.5mA 30uA Transition Mode PFC RoHS:否 制造商:Fairchild Semiconductor 開關頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
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