APPLICATION NOTE 1/6 28% LED (High Brightness LED HB LED) (/W) LED 1 LED LED DC AC AC AC LED LED LED LED 100 LED LED AC LED AC PFC 3 LED AC (Constant Current, CC) LEDLED (Constant Voltage, CV) LED 1Figure 1 2LED AC 1 DC DC DC DCLED (24 Vdc) 2 AC DCLED Semiconductor Components Industries, LLC, 2014 February, 2014 Rev. 2 1 Publication Order Number: AND9041JP/D
3 1 LED 100 WLED Figure 1. Single Stage Integrated LED Driver (Type 1) Figure 2. Two-Stage LED Driver with Single Front-End Converter (LED Power Supply) Type 2 LED LED LED DC LED AC LED LED. LED 1 LED 2
( ) LED 2( ) LED LED LED LED LEDLED LED 50% 50% 50% LED 50% LED LED (l m/w) LED 100%10% 20~25% LED 700 ma3.4 V 70 ma2.95 V 1 LED 2 0 LED LED ( 200 Hz~kHz ) ( ) PWM ( ) LED LED RMS ( ) LED LEDIC NCL30051 NCL30051 AC LED NCL30051 2 2PFC (Half-bridge Resonant HBR) EMI 2 LLCHBR PFC PWM NCL300512 HBR 2 PFC 2 FET ZVS EMI () 3
NCL30051 Figure 3 4 NCL30051 NCL30051Figure 1 2 12LED Figure 3. Traditional Two Stage Approach for High Efficiency LED Driver Figure 4. Simplified Control Scheme Offered by NCL30051 NCL30051 2 1 ( 2) ( 1) 2 NCL300512 LED NCL30051LED LED( 1 ) CCCV [LED 1 3] 4
1 LED LED LED 1( ) LED OSRAM Golden DRAGON Plus LW W5AM(LED) LED 350 ma [LED 100 ma~1 A 350 ma ] LED (m=)3 LED (n=)12 LED LED (I out ) 1.05 A (3 0.35 A) [ 2 DC DC ] I out m I LED (eq. 1) 2 LED LED LED LED[VF min VF nom VF max ] 350 ma[2.7 3.23.7] V V string [min nominalmax][n*vf min n*vf nom n*vf max ][32.4 38.444.4] V 44.4 V 32.4 V 350 maled VF LED350 ma 50 ma(10:1 ) Vf 10~15%Vf 25 C100 C VF 0.25V V out V out (V o min =) 31.4~(V o max =) 44.4 V V o ratio (44.4/31.4 = 1.41) V string max n VF max (eq. 2) V string min n VF min (eq. 3) V o max V string max (eq. 4) V o min V sstring max V margin (eq. 5) V o ratio V o max V o min (eq. 6) LED DC DC V out DC DC (//SEPIC ) LED (V dc bus ) V out DC DC 0.9 V dc bus 50 V V dc bus V o max D max (eq. 7) 3 LED V dc bus I out V dc bus (I out ) DC DC P o I out V dc bus D max (eq. 8) (1.05 50 0.9)/0.95 = 55.3 W ( PFC) 60 W 4PFC () PFC LED 4 1. ( )(85~135 Vac) 2. ( )(170~265 Vac) 220/240 Vac 5
3. (85~265 Vac) 4. 2(115 Vac277 Vac / 90~305 Vac ) ( 1 2) 2 NCL30051IC 3 4 LED AC 265 Vac( )305 Vac(/ ) AC PFC (V bulk ) PFC 380 V~400 V NCL30051 V bulk V bulk V bulk V bulk min V in max (rms) 2 (eq. 9) [265,305]Vac V in max [375, 431] Vdc V bulk min 380 V 435 V PFC Equation 9 0 0 45 Equation 9V bulk Figure 5. Relationship Between PFC Output Ripple and Input Voltage 5 PFC PFC LED( 2) PFC DC DCPFC Equation 9 HBR V bulk V bulk min 15% V bulk max V bulk max V bulk min 1.15 (eq. 10) 2 V bulk max [437, 500] Vdc 6
V bulk max PFC 500 V (305 Vac V in max )600 V (FET ) 15% (300/400 V) 265 V 450 V NCL30051 6 V bulk max V bulk max V ripp(p p) P o (2 f) V bulk max C bulk (eq. 11) 1W 1 F 47 F [437, 500] V V bulk max [7.8, 8.8] V HBR LED HBR rms [1] V bulk max 2 (100 F 300 V) 2 47 F 7 PFC PFC 0 600 V I d(avg) P o V bulk min (eq. 12) V f ( 3A MURS360) 8 PFC FET PFC FET CrM PFC 600/650 V FET 9 PFC PFCCrM PFC [2] (Zero Crossing Detection, ZCD) PFC 10 PFC 3 CrM NCL30051 PFCNCP1608 ZCD NCP1608 [2] NCP1608 [3] 11 HBR HBR Ratio HBR V bulk min Eff conv V dc bus (eq. 13) Eff conv HBR >0.95 V bulk min [380, 435] HBR[7.22, 8.26] V dc bus V bulk V dc bus (Equation 10 )HBR 2 LED 2 DC DC LED 12 HBR ( )HBR2 2 [3.61, 4.13] 1 2 HBR (L m ) (L lk )( 7
) ( ) NCL30051 HBR 13 HBR LLC EMI [4] 1 f s (eq. 14) 2 L ilk C r NCL30051 NCL30051 30 khz~150 khz( 15 khz~ 75 khz) 35 khz (L C)( ) ( ) C r f sw L lk L lk 100 HCr 0.2 F 14 HBR FET HBR FET FET V bulk max 600/650 V FET FET R ds / HBR FET (C oss ) FET R ds on NCL30051 (100 ma ) FET 15 HBR HBR 2 150 V V f I out 5A 10 A 16 HBR HBR ( ) ESR 17 CV LED TL431 RC () 1 18 2PFC NCL30051 PFC 1 OR NCL30051 Pcontrol Pcontrol PFC 2 PFC NCL30051 PFC 2 NCL30051 2 LED 8
1 LED NCL30051 NCL300511 LED 1 LEDNCL30051 2 1. LED 2 DC DC AC DC LED V o ratio 2. 2 LED (Constant Current/ Constant Voltage CCCV) 1 [2 2 ] 1 [ 2 ] LED LED LED 1 LED OSRAM Golden DRAGON Plus LW W5AM LED LED 350 ma[ LED100 ma~1 A 350 ma ] LED (m=)3 LED (n=)12 LED LED (I out ) 1.05 A (3 0.35 A) I out m I LED (eq. 15) 2 [ 2 ] LED LED LED[VF min VF nom VF max ] 350 ma[2.7 3.23.7] V V string [min nominalmax][n*vf min n*vf nom n*vf max ][32.4 38.444.4] V 44.4 V 32.4 V 350 maled VF LED350 ma 50 ma(10:1 ) Vf 10~15% VF 25 C100 C Vf 0.25 V V out V out (V o min =) 31.4~(V o max =) 44.4 V V o ratio (44.4/31.4 = 1.41) V string max n VF max (eq. 16) V string min n VF min (eq. 17) V o max V string max (eq. 18) V o min V string min V margin (eq. 19) V o ratio V o max V o min (eq. 20) 3 LED [ 2 ] V o max I out P o I out V o max (eq. 21) 44.4 1.05 = 46.6 W 2 ( PFC) 50~55 W 4 PFC () [ 2 ] 9
PFC LED 4 1. ( )(85~135 Vac) 2. ( )(170~265 Vac) 220/230 Vac 3. (85~265 Vac) 4. 2(115 Vac277 Vac / 90~305 Vac ) ( 1 2) (85~135 Vac) AC PFC (V bulk ) NCL30051 V bulk V bulk V bulk V bulk min V in max(rms) 2 (eq. 22) 135 Vac V in max 154 Vdc V bulk min 160 V 5 PFC[ 2 ] PFC PFC V bulk max V bulk min V o ratio 1.10 (eq. 23) V bulk max 248 Vdc 250 V V bulk max PFC 250 V (135 Vac Vin max ) 300 V(FET ) 16.7% FET 250 V 350 VLED VF V bulk max 6 [ 2 ] V bulk max V bulk max V ripp(p p) P o (2 f) V bulk max C bulk (eq. 24) 1W 1 F 47 F 257 V V bulk max 12.4 V HBR LED HBR rms [1] 7 PFC[ 2 ] PFC 0 15% 300 V I d(avg) P o V bulk min (eq. 25) V f ( 3A MURS340) 8 PFC FET [ 2 ] PFC FET CrM PFC 300 V FET 10
9 PFC[ 2 ] PFCCrM PFC [2] (Zero Crossing Detection, ZCD) PFC V bulk 10% 10 PFC 2 3 CrM NCL30051 PFCNCP1608 ZCD NCP1608 [2] NCP1608 [3] 11 HBR[ 2 ] HBR Ratio HBR V bulk min Eff conv V o min (eq. 26) Eff conv HBR >0.95 V bulk min 160 VHBR4.8 V o I o V bulk V o (Equation 10) HBR LED 12 HBR ( )HBR 2 2.4 1 2 HBR (L m ) (L lk )( ) ( ) NCL30051 HBR 13 HBR [ 2 ] LLC EMI [4] 1 f s (eq. 27) 2 L lk C r NCL30051 NCL30051 30 khz~150 khz ( 15 khz~75 khz) 35 khz (L C)( ) ( ) C r f sw L lk L lk 100 HC r 0.2 F 14 HBR FET [ 2 ] HBR FET FET V bulk max 300 V FET FET R ds / HBR FET (C oss ) FET R ds on NCL30051 (100 ma ) FET 11
15 HBR [ 2 ] HBR 2 150 V V f LED V o max 1 100 V I out 5 A 10 A 16 HBR2 HBR ( ) ESR 17 CCCV [ 2 ] LED 2 (2 IC) 1 LED LED LED PWM 2 2 CC CV () 1 18 2PFC [ 2 ] NCL30051 PFC / 1 OR NCL30051 Pcontrol Pcontrol PFC 2 PFC NCL30051 PFC 2 19 PWM [ 1 ] PWM PWM 2CCCVPWM 1 PWM 1 ( ) PWM1 PWM HBR HBR PWM NCL30051 PWM ( )PWM NCL30051 OSC PWM PWM PWM LLC ACLED NCL30051 2( 12) 2 1 1 NCL30051 NCL30051 1 NCL30051LED THD 12
1. AND8123/D 2. AND8396/D 3. NCP1608 Design Worksheet, http://www.onsemi.com/powersolutions/supportd oc.do?type=tools&rpn=ncp1608 4. AND8311/D AND9041/D ON SemiconductorONSemiconductor Components Industries, LLC (SCILLC) SCILLC () SCILLCwww.onsemi.com/site/pdf/Patent-Marking.pdf. SCILLC SCILLC SCILLC SCILLC SCILLC SCILLC SCILLC SCILLC SCILLC SCILLC PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303 675 2175 or 800 344 3860 Toll Free USA/Canada Fax: 303 675 2176 or 800 344 3867 Toll Free USA/Canada Email: orderlit@onsemi.com N. American Technical Support: 800 282 9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81 3 5817 1050 13 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative AND9041JP/D