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参数资料
| 型号： | L6562AD |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 0.8 A POWER FACTOR CONTROLLER, PDSO8 |
| 封装： | ROHS COMPLIANT, SOP-8 |
| 文件页数： | 7/26页 |
| 文件大小： | 557K |
| 代理商： | L6562AD |
L6562A
Application information
15/26
Figure 19. 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.
Imains
Vdrain
Imains
Vdrain
Input current
MOSFET's drain voltage
Rectified mains voltage
Input current
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PDF描述 |
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| L6562ADTR | 0.8 A POWER FACTOR CONTROLLER, PDSO8 |
| L6563STR | POWER FACTOR CONTROLLER, PDSO14 |
| L6563S | POWER FACTOR CONTROLLER, PDSO14 |
| L6564DTR | SWITCHING CONTROLLER, PDSO10 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L6562ADTR | 功能描述:功率因数校正 IC HV H-Bridge driver RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| L6562ADTR☞原装☜ | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:深创辉科技，全新原装L6562ADTR☞原装☜ |
| L6562AN | 功能描述:功率因数校正 IC Low 2.5mA 30uA Transition Mode PFC RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| L6562AT | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Transition-mode PFC controller |
| L6562ATD | 功能描述:开关变换器、稳压器与控制器 Transition-mode PFC controller RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
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