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参数资料
| 型号： | L6562ADTR |
| 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： | 8/26页 |
| 文件大小： | 557K |
| 代理商： | L6562ADTR |
Application information
L6562A
16/26
7.4
Operating with no auxiliary winding on the boost inductor
To generate the synchronization signal on the ZCD pin, the typical approach requires the
connection between the pin and an auxiliary winding of the boost inductor through a limiting
resistor. When the device is supplied by the cascaded DC-DC converter, it is necessary to
introduce a supplementary winding to the PFC choke just to operate the ZCD pin.
Another solution could be implemented by simply connecting the ZCD pin to the drain of the
power MOSFET through an R-C network as shown in figure 3: in this way the high-
frequency edges experienced by the drain will be transferred to the ZCD pin, hence arming
and triggering the ZCD comparator.
Also in this case the resistance value must be properly chosen to limit the current
sourced/sunk by the ZCD pin. In typical applications with output voltages around 400V,
recommended values for these components are 22pF (or 33pF) for CZCD and 330k for
RZCD. With these values proper operation is guaranteed even with few volts difference
between the regulated output voltage and the peak input voltage
Figure 20. ZCD pin synchronization without auxiliary winding
L6562A
CZCD
RZCD
5
ZCD
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| L6562ATDTR | 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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