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| 型号： | NCP1246AD100R2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 30/39页 |
| 文件大小： | 0K |
| 描述： | IC CTLR CURR MODE 100KHZ 8SOIC |
| 标准包装： | 2,500 |
| 系列： | * |
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NCP1246
Figure 63. Needs for Line Compensation For True Overpower Protection
To compensate this and have an accurate overpower
protection, an offset proportional to the input voltage is
added on the CS signal by turning on an internal current
source: by adding an external resistor in series between the
sense resistor and the CS pin, a voltage offset is created
across it by the current. The compensation can be adjusted
would be in the same order of magnitude. Therefore the
compensation current is only added when the FB voltage is
higher than V FB(OPCE) . However, because the HV pin is
being connected to ac voltage, there is needed an additional
circuitry to read or at least closely estimate the actual voltage
on the bulk capacitor.
by changing the value of the resistor.
But this offset is unwanted to appear when the current
sense signal is small, i.e. in light load conditions, where it
Figure 64. Overpower Protection Current Relation to Feedback Voltage
http://onsemi.com
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相关代理商/技术参数 |
参数描述 |
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| NCP1246B100DR2G | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Fixed Frequency Current Mode Controller for Flyback Converters |
| NCP1246B65DR2G | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Fixed Frequency Current Mode Controller for Flyback Converters |
| NCP1246BD065R2G | 功能描述:电流型 PWM 控制器 FIXED FREQ (65KHZ) CURREN RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| NCP1246BD100R2G | 功能描述:电流型 PWM 控制器 FIXED FREQ (65KHZ) CURREN RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| NCP1246-D | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Fixed Frequency Current Mode Controller for Flyback Converters |
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