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参数资料
| 型号： | NCP1027ATXGEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 24/30页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL NCP1027 10W STANDBY |
| 设计资源： | NCP1027ATXGEVB Schematic NCP1027ATXGEVB Test Procedure NCP1027ATXGEVB Bill of Materials |
| 标准包装： | 1 |
| 主要目的： | AC/DC，主面 |
| 输出及类型： | 1，非隔离 |
| 功率 - 输出： | 10W |
| 输出电压： | 5V |
| 电流 - 输出： | 2A |
| 输入电压： | 85 ~ 265VAC |
| 稳压器拓扑结构： | 回扫 |
| 频率 - 开关： | 65kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | NCP1027 |
| 其它名称： | NCP1027ATXGEVB-ND NCP1027ATXGEVBOS |
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NCP1027
Jittering
Frequency jittering is a method used to soften the EMI
signature by spreading the energy in the vicinity of the main
switching component. The NCP1027 offers a " 6%
deviation of the nominal switching frequency. The sweep
sawtooth is internally generated and modulates the clock
up and down with a fixed frequency of 300 Hz. Figure 43
shows the relationship between the jitter ramp and the
frequency deviation. It is not possible to externally disable
the jitter.
Jitter ramp
68.9kHz
65kHz
61.1kHz
Internal
sawtooth
adjustable
Figure 43. Modulation Effects on the Clock Signal by the
Jittering Sawtooth
Skip-Cycle
Skip cycle offers an efficient way to reduce the standby
power by skipping unwanted cycles at light loads.
However, the recurrent frequency in skip often enters the
audible range and a high peak current obviously generates
acoustic noise in the transformer. The noise takes its origins
in the resonance of the transformer mechanical structure
which is excited by the skipping pulses. A possible
solution, successfully implemented in the NCP1200 series,
also authorizes skip cycle but only when the power demand
as dropped below a given level. This is what Figure 44
shows, as implemented on the NCP1027.
Nominal peak
current
Skip cycle
current limit
0
Figure 44. Low Peak Current Skip Cycle Guarantees Noise-Free Operation
http://onsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP1027P065G | 功能描述:电流型 PWM 控制器 PWM Current Mode Controller 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 |
| NCP1027P100G | 功能描述:交流/直流开关转换器 PWM Current Mode Controller RoHS:否 制造商:STMicroelectronics 输出电压:800 V 输入/电源电压（最大值）:23.5 V 输入/电源电压（最小值）:11.5 V 开关频率:115 kHz 电源电流:1.6 mA 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:SSO-10 封装:Reel |
| NCP1027PO65G | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:ON Semiconductor 功能描述: |
| NCP1028 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Power Factor Controllers |
| NCP1028LEDGEVB | 功能描述:电源管理IC开发工具 720MA 18V LED DRIVER 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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