On Semi NCP4303 216W一体式台式PC电源解决方案
On Semi 公司的216 W一体式台式PC电源解决方案采用NCP4303控制器以及 NCP1397和NCP4303器件，它采用谐振技术用于提升能效及降低电磁干扰(EMI)；工作模式能效约为92% ；空载能耗＜370mA ；具有超越80 PLUS®银级和CSCI®银级单输出计算机电源能效要求以及超越“能源之星”2.0版外部电源能效要求和符合IEC 61000-3-2功率因数要求，在90至265 VAC条件下功率因数高于0.90。本文介绍了NCP4303控制器主要特性，方框图，典型应用以及216 W一体式台式PC电源主要特性，电路图和详细材料清单（BOM）。
The NCP1605 is a controller that exhibits near−unity power factor while operating in fixed frequency, Discontinuous Conduction Mode (DCM) or in Critical Conduction Mode (CRM).Housed in a SOIC−16 package, the circuit incorporates all the features necessary for building robust and compact PFC stages, with a minimum of external components. In addition, it integrates the skip cycle capability to lower the standby losses to a minimum.
NCP4303主要特性：
Near−Unity Power Factor
Fixed Frequency, Discontinuous Conduction Mode Operation
Critical Conduction Mode Achievable in Most Stressful Conditions
Lossless High Voltage Current Source for Startup
Soft Skip_ Cycle for Low Power Standby Mode
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