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| 型号： | NCP1012ST130T3 |
| 厂商： | ON Semiconductor |
| 文件页数： | 13/24页 |
| 文件大小： | 0K |
| 描述： | IC OFFLINE SWIT SMPS CM SOT223 |
| 产品变化通告： | Product Obsolescence 11/Feb/2009 |
| 标准包装： | 4,000 |
| 输出隔离： | 隔离 |
| 频率范围： | 117kHz ~ 143kHz |
| 输入电压： | 8.5 V ~ 10 V |
| 输出电压： | 700V |
| 功率（瓦特）： | 19W |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | TO-261-4，TO-261AA |
| 供应商设备封装： | SOT-223 |
| 包装： | 带卷 (TR) |
NCP1010, NCP1011, NCP1012, NCP1013, NCP1014
100%
Peak current
at nominal power
Skip--cycle
current limit
25%
Figure 20. Low Peak Current Skip--Cycle Guarantees Noise--Free Operation
Full power operation involves the nominal switching
frequency and thus avoids any noise when running.
Experiments carried on a 5.0 W universal mains board
unveiled a standby power of 300 mW @ 230 Vac with the
DSS activated and dropped to less than 100 mW when an
auxiliary winding is connected.
Frequency Jittering for Improved EMI Signature
By sweeping the switching frequency around its nominal
value, it spreads the energy content on adjacent frequencies
rather than keeping it centered in one single ray. This offers
the benefit to artificially reduce the measurement noise on
a standard EMI receiver and pass the tests more easily. The
EMI sweep is implemented by routing the V CC ripple
(induced by the DSS activity) to the internal oscillator. As a
result, the switching frequency moves up and down to the
DSS rhythm. Typical deviation is ? 3.3% of the nominal
frequency. With a 1.0 V peak--to--peak ripple, the frequency
will equal 65 kHz in the middle of the ripple and will
increase as V CC rises or decrease as V CC ramps down.
Figure 21 portrays the behavior we have adopted.
V CC Ripple
62.85 kHz
VCC ON
VCC OFF
65 kHz
67.15 kHz
Internal Sawtooth
Figure 21. The V CC ripple is used to introduce a frequency jittering on the internal oscillator sawtooth.
Here, a 65 kHz version was selected.
http://onsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP1012ST130T3G | 功能描述:电流型 PWM 控制器 Low Standby Power Monolithic Switcher 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 |
| NCP1012ST65T3 | 功能描述:电流型 PWM 控制器 Low Standby Power 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 |
| NCP1012ST65T3G | 功能描述:电流型 PWM 控制器 Low Standby Power Monolithic Switcher 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 |
| NCP1013 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Power Factor Controllers |
| NCP1013/D | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Self-Supplied Monolithic Switcher for Low Standby-Power Offline SMPS |
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