Cirrus公司的CS1601和CS1601H是用于電子鎮流器的數字PFC控制器,具有最低的PFC系統成本.控制器工作在可變頻率不連續導通模式(VFDCM)和零電流開關,具有最好的THD和最小化磁性元件尺寸.主要用在LED電源/驅動器,熒光燈鎮流器和HID鎮流器.本文介紹了CS1601和CS1601H主要特性, 方框圖, 應用電路圖和120W高效PFC演示板主要特性,電路圖和材料清單.
The CS1601 and CS1601H are digital power factor correction (PFC) controllers designed to deliver the lowest PFC system cost in electronic ballast applications. The controller operates in a variable frequency discontinuous conduction mode (VFDCM) with zero-current switching (ZCS) optimized to deliver best-in-class THD and minimize the size and cost of magnetic components. The CS1601 operates at switching frequencies up to 70kHz while the CS1601H operates at frequencies extending to 100kHz.
The VF-DCM control algorithm varies both duty cycle and frequency. This spreads the EMI frequency spectrum, thus reducing conducted EMI filtering requirements. In addition, the maximum switching frequency is reached at the peak of the AC input, which allows for use of a smaller, more cost-effective boost inductor.
The feedback loop is closed through an integrated compensation network within the controller, eliminating the need for additional external components. Protection features such as overvoltage, overcurrent, open and short-circuit protection, overtemperature, and brownout protect the system during abnormal transient conditions.
CS1601/1H主要特性:
Low PFC System Cost
Best-in-class THD
Digital EMI Noise Shaping Reduces Conducted EMI
Adaptive Switching Frequency Control Minimizes Boost Inductor Size
High Efficiency Due to Zero-current Switching
Integrated Feedback Compensation Simplifies System Design
Comprehensive Safety Features
• Undervoltage Lockout (UVLO)
• Output Overvoltage Protection
• Cycle-by-cycle Current Limiting
• Input Voltage Brownout Protection
• Open/Short Loop Protection for IAC & IFB Pins
• Thermal Shutdown
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Pin placement similar to traditional boundary mode (CRM) Controllers
CS1601/1H應用:on
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LED Power Supply/Driver
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Fluorescent Ballasts
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HID Ballasts
圖1. CS1601/1H方框圖
圖2. CS1601/1H應用電路圖
CS1601 120W高效PFC演示板
The CDB1601-120W board demonstrates the performance of the CS1601 digital PFC controller as a standalone unit. This board is 95% efficient at full load, and has been tailored for use with a resonant second stage to power up to two T5 fluorescent lamps for a maximum output power of 108W. A resonant second stage driver efficiency of 94% is assumed for this application.
120W高效PFC演示板主要特性:
Line Voltage Range: 108 to 305 VACrms
Output Voltage (VLINK): 460V
Rated Pout : 115W
Efficiency: 95% @ 115W
Spread Spectrum Switching Frequency
Integrated Digital Feedback Control
Low Component Count
圖3. 120W高效PFC演示板外形圖
圖4. 120W高效PFC演示板電路圖
120W高效PFC演示板材料清單:
詳情請見:
http://www.cirrus.com/en/pubs/proDatasheet/CS1601H_PP6.pdf
和
http://www.cirrus.com/en/pubs/rdDatasheet/CDB1601-120W_DB3.pdf
