</a>LED" title="LED">LED" title="LED">LED照明的控制IC,具有兩種工作模式:臨界導(dǎo)通模式(CRM)和固定開關(guān)頻率模式.CRM模式能精確地控制LED電流和修正功率因素,具有高效率,而固定開關(guān)頻率模式能大大地降低外接元件數(shù)量.本文介紹了兩種工作模式連接框圖, R2A20134SP多種評(píng)估板主要特性,以及R2A20134EVB-NN1E評(píng)估板特性,電路圖,元件數(shù)值計(jì)算方法,110VAC和220VAC的材料清單和PCB元件布局圖.
R2A20134SP is a control IC for LED lighting. It has two operation modes, Critical Conduction mode (CRM) and fixed switching frequency mode. User can choose one suitable mode for their purpose.
At Critical Conduction mode (CRM), this IC can control LED current precisely and correct power factor and achieve high efficiency by zero-current switching. At Fixed-Frequency mode, user can reduce the external components dramatically. AT Peak Current Control mode applying Fixed Switching Frequency Mode realized the minimum numbers of external components, smallest packaging and low BOM cost. Also this allows the isolated flyback operation.
圖1.R2A20134SP臨界導(dǎo)通模式(Rrt接地)框圖
圖2.R2A20134SP固定開關(guān)頻率模式(Rrt接Vref)框圖
圖3.R2A20134SP峰值電流控制電路圖
圖4.R2A20134SP恒定ON時(shí)間控制(PFC)電路圖
R2A20134SP多種評(píng)估板特一攬表:
圖5. R2A20134EVB-NN1E評(píng)估板外形圖
圖6. R2A20134EVB-NN1E評(píng)估板電路圖(誤差放大器控制)
R2A20134EVB-NN1E評(píng)估板主要元件計(jì)算表:
R2A20134EVB-NN1E (誤差放大器控制)材料清單(BOM):
Vin = AC85-132 V, Vf = 65 V, ILED = 100 mA
AC220 V input, VF = 35 V, ILED = 400 mA變更的元件數(shù)值:
圖7. R2A20134EVB-NN1E評(píng)估板元件布局圖:左:頂層;右:底層
詳情請(qǐng)見:
http://documentation.renesas.com/doc/products/linear/r03ds0033ej_r2a20134sp.pdf
和
http://documentation.renesas.com/doc/products/linear/apn/r03an0004ej0200_r2a20134sp.pdf
R2A20134SP is a control IC for LED lighting. It has two operation modes, Critical Conduction mode (CRM) and fixed switching frequency mode. User can choose one suitable mode for their purpose.
At Critical Conduction mode (CRM), this IC can control LED current precisely and correct power factor and achieve high efficiency by zero-current switching. At Fixed-Frequency mode, user can reduce the external components dramatically. AT Peak Current Control mode applying Fixed Switching Frequency Mode realized the minimum numbers of external components, smallest packaging and low BOM cost. Also this allows the isolated flyback operation.
圖1.R2A20134SP臨界導(dǎo)通模式(Rrt接地)框圖
圖2.R2A20134SP固定開關(guān)頻率模式(Rrt接Vref)框圖
圖3.R2A20134SP峰值電流控制電路圖
圖4.R2A20134SP恒定ON時(shí)間控制(PFC)電路圖
R2A20134SP多種評(píng)估板特一攬表:
圖5. R2A20134EVB-NN1E評(píng)估板外形圖
圖6. R2A20134EVB-NN1E評(píng)估板電路圖(誤差放大器控制)
R2A20134EVB-NN1E評(píng)估板主要元件計(jì)算表:
R2A20134EVB-NN1E (誤差放大器控制)材料清單(BOM):
Vin = AC85-132 V, Vf = 65 V, ILED = 100 mA
AC220 V input, VF = 35 V, ILED = 400 mA變更的元件數(shù)值:
圖7. R2A20134EVB-NN1E評(píng)估板元件布局圖:左:頂層;右:底層
詳情請(qǐng)見:
http://documentation.renesas.com/doc/products/linear/r03ds0033ej_r2a20134sp.pdf
和
http://documentation.renesas.com/doc/products/linear/apn/r03an0004ej0200_r2a20134sp.pdf
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(diǎn)。轉(zhuǎn)載的所有的文章、圖片、音/視頻文件等資料的版權(quán)歸版權(quán)所有權(quán)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(rèn)版權(quán)者。如涉及作品內(nèi)容、版權(quán)和其它問題，請(qǐng)及時(shí)通過電子郵件或電話通知我們，以便迅速采取適當(dāng)措施，避免給雙方造成不必要的經(jīng)濟(jì)損失。聯(lián)系電話：010-82306118；郵箱：aet@chinaaet.com。