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参数资料
| 型号： | NCP1080DEG |
| 厂商： | ON Semiconductor |
| 文件页数： | 13/15页 |
| 文件大小： | 221K |
| 描述： | IC CONV CTLR POE-PD 13W 20-TSSOP |
| 标准包装： | 74 |
| 类型： | 以太网供电开关（PoE） |
| 应用： | 远程外设（工业控制，相机，数据访问） |
| 内部开关： | 是 |
| 电流限制： | 500mA |
| 电源电压： | 0 V ~ 57 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽）裸露焊盘 |
| 供应商设备封装： | 20-TSSOP-EP |
| 包装： | 管件 |
NCP1080
http://onsemi.com
13
Current Limit Comparator
The NCP1080 current limit block behind the CS pin
senses the current flowing in the external MOSFET for
current mode control and cyclebycycle current limit. This
is performed by the current limit comparator which, on the
CS pin, senses the voltage across the external Rcs resistor
located between the source of the MOSFET and the ARTN
pin.
The NCP1080 also provides a blanking time function on
CS pin which ensures that the current limit and PWM
comparators are not prematurely trigged by the current spike
that occurs when the switching MOSFET turns on.
Slope Compensation Circuitry
To overcome subharmonic oscillations and instability
problems that exist with converters running in continuous
conduction mode (CCM) and when the duty cycle is close
or above 50%, the NCP1080 integrates a current slope
compensation circuit. The amplitude of the added slope
compensation is typically 110 mV over one cycle.
As an example, for an operating switching frequency of
250 kHz, the internal slope provided by the NCP1080 is
27.5 mV/ mA typically.
DCDC Controller Oscillator
The frequency is configured with the Rosc resistor
inserted between OSC and ARTN, and is defined by the
following equation:
R
OSC
(kW) +
38600
F
OSC
(kHz)
The duty cycle limit is fixed internally at 80%.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP1080DER2G | 功能描述:直流/直流开关转换器 POE-PD 13W DC-DC RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| NCP1081 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Integrated High Power PoE-PD Interface & DC-DC Converter Controller |
| NCP1081DEG | 功能描述:DC/DC 开关控制器 POE-PD 40W DC-DC RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| NCP1081DER2G | 功能描述:DC/DC 开关控制器 POE-PD 40W DC-DC RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| NCP1081SPCGEVB | 功能描述:电源管理IC开发工具 HPOWER POE-PD SPLITTER RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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