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参数资料
| 型号： | L6563H |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | POWER FACTOR CONTROLLER, PDSO16 |
| 封装： | ROHS COMPLIANT, SOP-16 |
| 文件页数： | 17/48页 |
| 文件大小： | 1634K |
| 代理商： | L6563H |
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Application information
L6563H
24/48
Doc ID 16047 Rev 2
6
Application information
6.1
Overvoltage protection
Normally, the voltage control loop keeps the output voltage Vo of the PFC pre-regulator
close to its nominal value, set by the ratio of the resistors R1 and R2 of the output divider. A
pin of the device (PFC_OK) has been dedicated to monitor the output voltage with a
separate resistor divider (R3 high, R4 low, see Figure 38). This divider is selected so that
the voltage at the pin reaches 2.5 V if the output voltage exceeds a preset value, usually
larger than the maximum Vo that can be expected.
Example: VO = 400 V, VOX = 434 V. Select: R3 = 8.8 MΩ; then: R4 = 8.8 MΩ 2.5/(434-2.5) =
51 k
Ω.
When this function is triggered, the gate drive activity is immediately stopped until the
voltage on the pin PFC_OK drops below 2.4 V. Notice that R1, R2, R3 and R4 can be
selected without any constraints. The unique criterion is that both dividers have to sink a
current from the output bus which needs to be significantly higher than the bias current of
both INV and PFC_OK pins.
Figure 38.
Output voltage setting, OVP and FFP functions: internal block diagram
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L6563HTR | 功能描述:功率因数校正 IC 700V 6mA Start-Up 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 |
| L6563S | 功能描述:功率因数校正 IC Transition Mode PFC 5mA 90uA 1.5% Ref 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 |
| L6563STR | 功能描述:功率因数校正 IC Transition Mode PFC 5mA 90uA 1.5% Ref 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 |
| L6563TR | 功能描述:功率因数校正 IC POWER SUPPLY 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 |
| L6564 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:10 pin transition-mode PFC controller |
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