</a>PFC" title="PFC">PFC" title="PFC">PFC)控制器,它能動態管理PFC,從而在很寬負載范圍內得到高效率.CS1501具有零電壓開關拓撲,欠壓鎖住(UVLO),輸出過壓保護,逐個周期的限流,開路/短路保護和熱關斷,主要用在LCD和LED TV,筆記本電腦,服務器/通信設備.本文介紹了CS1501主要特性,方框圖,典型應用電路圖以及CS1501 250W高效PFC演示板主要特性,電路圖,材料清單和PCB元件布局圖表.

The CS1501 is a high-performance digital power factor correction (PFC) controller designed for switching mode power supply (SMPS) applications. The CS1501 actively manages the power factor correction while achieving high efficiency over a wide load range.

The CS1501 adaptively controls the input AC current so that it is in phase with the AC mains voltage, and its waveform mimics the input voltage waveform. The PFC controller executes adaptive digital algorithms designed to shape the AC mains input current waveform to be in phase with the input voltage waveform.

The CS1501 is equipped with a zero-current detection (ZCD) circuit providing the PFC digital controller the capability to turn on the MOSFET when the voltage across the drain and source is near zero. Additionally, a current-sensing circuit is incorporated for instantaneous overcurrent protection.

CS1501主要特性:

• Digital EMI Noise Shaping

• Adaptive Digital Energy Controller

• Excellent Efficiency Under All Load and Line Conditions

• Zero-voltage Switching Topology

• Minimal External Devices Required

• Adaptive Digital Control Loop

• Comprehensive Safety Features

• Undervoltage Lockout (UVLO)

• Output Overvoltage Protection

• Cycle-by-cycle Current Limiting

• Open/Short Loop Protection for IAC & IFB Pins

• Thermal Shutdown

• Pin Placement Similar to Traditional Boundary Mode (CRM) Controllers

CS1501應用:

? LCD and LED TVs

? Notebooks

? Server/Telecom

圖1.CS1501方框圖

圖2.CS1501典型應用電路圖

CS1501 250W高效PFC演示板

The CDB1501-250W board demonstrates the performance of the CS1501 digital PFC controller with a 250 Watt output at a link voltage of 400 volts.

The CDB1501-250W board demonstrates the performance of the CS1501 with input voltage range of 90-265 VAC, typically seen in universal input applications. This board has been designed for a Vlink of 400V, 250 Watts, full load.

Extreme caution needs to be exercised while handling this board. This board is to be used by trained professionals only. Prior to applying AC power to the CDB1501-250W board, the CS1501 needs to be biased using an external 13 VDC power supply.

This document provides the schematic for the board. It includes oscilloscope screen shots that indicate operating waveforms. Graphs are also provided that document the performance of the board in terms of Efficiency vs. Load, Total Harmonic Distortion vs. Load, and Power Factor vs. Load for the CS1501 PFC controller IC.
CS1501 250W高效PFC演示板主要特性:

? Variable On Time, Variable Frequency, DCM PFC Controller

? Line Voltage Range: 90 to 265VAC RMS

? Output voltage: 400V

? Rated Pout: 250W

? Efficiency: 96.5% @ 250W, 220VAC

? No-load Power Dissipation: <0.3W

? Low Component Count

? Supports Cirrus Logic Product CS1501

圖3.CS1501 250W高效PFC演示板外形圖

圖4.CS1501 250W高效PFC演示板電路圖
CS1501 250W高效PFC演示板材料清單:



圖5.CS1501 250W高效PFC演示板PCB元件布局圖(頂層)

圖6.CS1501 250W高效PFC演示板PCB元件布局圖(底層)
詳情請見:
http://www.cirrus.com/en/pubs/proDatasheet/CS1501_F4.pdf
和
http://www.cirrus.com/en/pubs/rdDatasheet/CDB1501-250W_DB1.pdf