LED電源解決方案

1、編者按：Fairchild公司的大功率LED鎮(zhèn)流器采用諧振半橋轉(zhuǎn)換器FSFR2100和PFC控制器FAN7529,通用輸入電壓90-265Vrms,總輸出功率200W,提供六個恒流直流輸出,每個容量為0.7A/48V.也可改變?yōu)?.35A/96V.本文首先介紹了FAN7529和FSFR2100的主要特性,方框圖,典型應(yīng)用電路.接著介紹了200W LED鎮(zhèn)流器電源解決方案的詳細電路圖和所用材料清單(BOM).照明工程師社區(qū)CW2?+rr6h V q6照明工程師社區(qū)_Da5pL2aZThe FAN7529 is an active power factor correction (PFC) con

2、troller for boost PFC applications that operates in critical conduction mode (CRM). It uses the voltage modew1auNE8FPWM that compares an internal ramp signal with the error amplifier output to generate MOSFET turn-off signal.照明工程師社區(qū)H P%J |DzDqBecause the voltage-mode CRM PFC controller does not need

3、 rectified AC line voltage information, it saves the power loss of the input voltage sensing network necessary for the current-mode CRM PFC controller.Cf2p8i /AH &d:aFAN7529 provides many protection functions, such as over-voltage protection, open-feedback protection, overcurrent protection, and und

4、er-voltage lockout protection.照明工程師社區(qū)$I$|-N W0hk(kQ a(Tp3 ?!Z.AvyThe FAN7529 can be disabled if the INV pin voltage is lower than 0.45V and the operating current decreases to 65A. Using a new variable on-time control method, THD is lower than the conventional CRM boost PFC ICs.,N&xQm,照明工程師社區(qū),n:/sN-F

5、AN7529主要特性:照明工程師社區(qū)/j+i e#BLow Total Harmonic Distortion (THD)照明工程師社區(qū)x;V(w u)F7_UU)WPrecise Adjustable Output Over-Voltage Protection;k3n)I _5xOpen-Feedback Protection and Disable Function照明工程師社區(qū)-Q_ ZC.I8K4viZero Current Detector照明工程師社區(qū)Z A s G.kwM150s Internal Start-up Timer_E;p5o*G xMOSFET Over-Curr

6、ent Protection照明工程師社區(qū)+m V&u%bE ZuUnder-Voltage Lockout with 3.5V Hysteresis照明工程師社區(qū)1e#KG0aGB!?:qe/jLow Start-up (40A) and Operating Current (1.5mA)#y7F&S1T/GS .v8cTotem Pole Output with High State ClampIhT/WSS9V J2bt+500/-800mA Peak Gate Drive Current6v$w2J8-Pin DIP or 8-Pin SOP照明工程師社區(qū)!_bd/MZg0_sy.n6

7、kK eVhFAN7529應(yīng)用:$xUA;DZ Adapter8bVk|/yv:VBallast照明工程師社區(qū) HG0y+R!Or,d8c,RLCD TV, CRT TVeM d q.Dw ySMPS照明工程師社區(qū)jc Fe;G#S5_7S+IS照明工程師社區(qū)mFe+Dy(?:gJ圖1.AN7529功能方框圖照明工程師社區(qū) mh0zK照明工程師社區(qū)$?(|7I2fYj照明工程師社區(qū)R HK, Ma;G_NX!D圖2.FAN7529典型Boost PFC應(yīng)用照明工程師社區(qū) e$bmNQ+i-r照明工程師社區(qū);XDQ2C X;?T_8W9m照明工程師社區(qū)/C7-B dpi_,L*|e# -t圖3.

8、 FAN7529典型應(yīng)用電路圖照明工程師社區(qū)r)ut *BojG照明工程師社區(qū) QR&MN#RU演示板電路元件列表:照明工程師社區(qū)U|*o H1C3T,F#h xAGwF|S%c%Sf照明工程師社區(qū)?5n+EbOtQ照明工程師社區(qū)ocI6Y J9Jpc!H1da采用FSFR2100的200W電源解決方案$q tK&qgk:f1KAgE(w Ri0P4T22WThe FSFR-series are highly integrated power switches designed for high-efficiency half-bridge resonant converters. Offer

9、ing everything necessary to build a reliable and robust resonant converter, the FSFR-series simplifies designs and improves productivity, while improving performance. The FSFR-series combines power MOSFETs with fast-recovery type body diodes, a high-side gate-drive circuit, an accurate current contr

10、olled oscillator, frequency limit circuit, soft-start, and built-in protection functions. The high-side gate-drive circuit has a common-mode noise cancellation capability, which guarantees stable operation with excellent noise immunity. The fast-recovery body diode of the MOSFETs improves reliabilit

11、y against abnormal operation conditions, while minimizing the effect of the reverse recovery. Using the zero-voltage-switching (ZVS) technique dramatically reduces the switching losses and significantly improves efficiency. The ZVS also reduces the switching noise noticeably, which allows a small-si

12、zed Electromagnetic Interference (EMI) filter.照明工程師社區(qū) xM q*t4_Sg2H PY/b%NFSFR2100主要特性:lRtq esgK#J照明工程師社區(qū),I54AI/|CrVariable Frequency Control with 50% Duty Cycle for Half-Bridge Resonant Converter Topology照明工程師社區(qū)&_vWPD,Q:mHigh Efficiency through Zero Voltage Switching (ZVS)照明工程師社區(qū)5|1XG3rq)L,ZMInterna

13、l Super-FET s with Fast-Recovery Type Body Diode (trr=120ns) for FSFR2000/1900/1800/1700!H2r7tv:v(x O*Fixed Dead Time (350ns) Optimized for MOSFETs+*ix5if!Up to 300kHz Operating Frequencya|%g ,ZB/FxPulse Skipping for Frequency Limit (Programmable) at Light-Load Condition照明工程師社區(qū)tl6n)S%b6pRemote On/Of

14、f Control Using Control Pin照明工程師社區(qū)GUl%daProtection Functions: Over-Voltage Protection (OVP), Over-Load Protection (OLP), Over-Current Protection (OCP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD)7V(n P6W,yB照明工程師社區(qū)kQd5I#C#BFSFR2100應(yīng)用:照明工程師社區(qū)$JO!g&F&,a A APDP and LCD TVs7n

15、R-e6Kl |YSDesktop PCs and ServersYB*j pv3raAdapters照明工程師社區(qū)Hm*Tx8FTelecom Power Supplies照明工程師社區(qū)l5A7TJC2F7FAudio Power Supplies;J H7z#g3j LEK照明工程師社區(qū)P1A?X E-1I5fVRaxY*nH8DA*gj$Y1Jj圖4.FSFR2100方框圖Ti Iw xg b!H8B照明工程師社區(qū)6t9Pq-|#ItN.T)G|:m(d/c圖5.FSFR2100典型應(yīng)用電路 (LLC 諧振半橋轉(zhuǎn)換器)照明工程師社區(qū)bBdg1Io*O,c-_hh0I%jTv2y+T-K:

16、h|7x#c2OP k圖6.FSFR2100典型應(yīng)用電路照明工程師社區(qū)#D&m1K&u_!Wb1o/q-xE9JB照明工程師社區(qū)a CA;K9Y_v1hThis document describes the proposed solution for a 200 W Power Supply using the FSFR2100 Fairchild Power Switch (FPS). The input voltage range is 90 265 VRMS and there are six outputs with 0.7A / 48V max. each. The board consists of a high power factor pre-regulator based on the FAN6961 voltage mode PFC controller and an isolated DC/DC converter based on a resonant LLC topology.!LEQlTS#fThis document contains the power supply specification, schematic, bill of materials and transformer documentation.照明工程師