</a>LED" title="LED">LED" title="LED">LED燈驅(qū)動器,內(nèi)置了高壓自偏置電路,輸入電壓范圍80VAC ~ 308VAC,帶自動重起模式的AOCP功能,內(nèi)置超溫保護功能,主要用于裝飾LED燈和低功率LED燈.本文介紹了FL7701主要特性,方框圖,典型和高壓應用電路以及帶和不帶電解電容的應用電路,2.4W LED鎮(zhèn)流器電路圖,材料清單和PCB布局圖.
The FL7701 LED lamp driver is a simple IC with PFC function. The special “adopted digital” technique of the IC can automatically detect input voltage condition and send an internal reference signal for achieving high power factor. When AC input is applied to the IC, PFC function is automatically enabled. Otherwise, when DC input is applied to the IC, PFC function is automatically disabled. The FL7701 does not need a bulk capacitor(electrolytic capacitor) for supply rail stability, which can significantly affect to LED lamp system.
FL7701主要特性:
? Digitally Implemented Active PFC Function (No Additional Circuit Necessary for High PF)
? Built-in HV Supplying Circuit: Self Biasing
? Application Input Range :80VAC ~ 308VAC
? AOCP Function with Auto-Restart Mode
? Built-in Over-Temperature Protection Function
? Cycle-by-Cycle Current Limit
? Current-Sense Pin Open Protection
? Low Operating Current: 0.85mA (Typical)
? Under-Voltage Lockout with 5V Hysteresis
? Programmable Oscillation Frequency
? Programmable LED Current
? Analog Dimming Function
? Soft-Start Function
? Precise Internal Reference: ±3%
FL7701應用:
? LED Lamp for Decorative Lighting
? LED Lamp for Low-Power Lighting
圖1.FL7701方框圖
圖2.FL7701典型應用電路圖
圖3.FL7701高壓應用電路圖
圖4.FL7701無電解電容的應用電路
圖5.FL7701帶電解電容的應用電路
采用FL7701的2.4W LED鎮(zhèn)流器
This document describes the proposed solution for a universal-input 2.4W LED ballast using the FL7701. The input voltage range is 90VRMS – 265VRMS and there is one DC output with a constant current of 85mA at 28VMAX. This document contains general description of FL7701, the power supply specification, schematic, bill of materials, and the typical operating characteristics.
圖6.2.4W LED鎮(zhèn)流器外形圖
圖7.2.4W LED鎮(zhèn)流器電路圖
2.4W LED鎮(zhèn)流器材料清單:
圖8.2.4W LED鎮(zhèn)流器PCB布局圖
詳情請見:
http://www.fairchildsemi.com/ds/FL/FL7701.pdf
和
http://www.fairchildsemi.com/products/evaluationboards/FEBFL7701_L30U003A.pdf?user-guide=
The FL7701 LED lamp driver is a simple IC with PFC function. The special “adopted digital” technique of the IC can automatically detect input voltage condition and send an internal reference signal for achieving high power factor. When AC input is applied to the IC, PFC function is automatically enabled. Otherwise, when DC input is applied to the IC, PFC function is automatically disabled. The FL7701 does not need a bulk capacitor(electrolytic capacitor) for supply rail stability, which can significantly affect to LED lamp system.
FL7701主要特性:
? Digitally Implemented Active PFC Function (No Additional Circuit Necessary for High PF)
? Built-in HV Supplying Circuit: Self Biasing
? Application Input Range :80VAC ~ 308VAC
? AOCP Function with Auto-Restart Mode
? Built-in Over-Temperature Protection Function
? Cycle-by-Cycle Current Limit
? Current-Sense Pin Open Protection
? Low Operating Current: 0.85mA (Typical)
? Under-Voltage Lockout with 5V Hysteresis
? Programmable Oscillation Frequency
? Programmable LED Current
? Analog Dimming Function
? Soft-Start Function
? Precise Internal Reference: ±3%
FL7701應用:
? LED Lamp for Decorative Lighting
? LED Lamp for Low-Power Lighting
圖1.FL7701方框圖
圖2.FL7701典型應用電路圖
圖3.FL7701高壓應用電路圖
圖4.FL7701無電解電容的應用電路
圖5.FL7701帶電解電容的應用電路
采用FL7701的2.4W LED鎮(zhèn)流器
This document describes the proposed solution for a universal-input 2.4W LED ballast using the FL7701. The input voltage range is 90VRMS – 265VRMS and there is one DC output with a constant current of 85mA at 28VMAX. This document contains general description of FL7701, the power supply specification, schematic, bill of materials, and the typical operating characteristics.
圖6.2.4W LED鎮(zhèn)流器外形圖
圖7.2.4W LED鎮(zhèn)流器電路圖
2.4W LED鎮(zhèn)流器材料清單:
圖8.2.4W LED鎮(zhèn)流器PCB布局圖
詳情請見:
http://www.fairchildsemi.com/ds/FL/FL7701.pdf
和
http://www.fairchildsemi.com/products/evaluationboards/FEBFL7701_L30U003A.pdf?user-guide=
本站內(nèi)容除特別聲明的原創(chuàng)文章之外，轉(zhuǎn)載內(nèi)容只為傳遞更多信息，并不代表本網(wǎng)站贊同其觀點。轉(zhuǎn)載的所有的文章、圖片、音/視頻文件等資料的版權歸版權所有權人所有。本站采用的非本站原創(chuàng)文章及圖片等內(nèi)容無法一一聯(lián)系確認版權者。如涉及作品內(nèi)容、版權和其它問題，請及時通過電子郵件或電話通知我們，以便迅速采取適當措施，避免給雙方造成不必要的經(jīng)濟損失。聯(lián)系電話：010-82306118；郵箱：aet@chinaaet.com。