AND9094JP - NCL30002高力率バックLEDドライバ

Transcription

1 LED LED (CFL) (PF = ) 7~5 /W LED 25 /W LED 0 /0 00% 640 /W LED LED LED A9 LED A9 LED ENERGY STAR / ENERGY STAR 5W 0.7 LED W LED 0.9 APPLICATION NOTE 90~264 Vac 50 Hz 60 Hz LED (CrM) 8 LED ~3 V LED 750 ma LED < ±35% 00 Vac~32 Vac 60 Hz 88% 0.9 LED (CCM) (DCM) 2 DCM 0 CrM. CrM EMI EMI Semiconductor Components Industries, LLC, 203 October, 203 Rev. Publication Order Number: AND9094JP/D

2 V in+ Q buck L out V out+ Input D buck C out Output Controller V in R sense V out Figure. Conventional Simplified Buck Converter V in+ V out+ D buck L out Input NCL30002 Q buck C out Output V in R sense V out Figure 2. Inverted or Reverse Buck Converter IC + CrM 2 LED LED 3. (I in =0) Vin Vout 2. (T on = ) T on PF 3. (I peak = ) LED CrM 2

3 Mode 3 I peak = Constant Mode 2 t on = Constant Mode Input Current = Conduction Angle Figure 3. Theoretical Average Input Current over One Half Line Cycle (Conduction Angle) PFC (Ton_max ) RMS Figure Conduction Angle Figure 4. The Bat Effect due to Large T on Across One Half Line Cycle 3

4 ( EMI ) 3 3( ) 60%( 08 ) 0.9 LED Table 3 Table. EFFECT OF TIME IN VARIOUS MODES ON POWER FACTOR AND OUTPUT CURRENT Time in Mode Time in Mode 2 Time in Mode 3 More Less More Less More Less Power Factor Lower Higher Higher Lower Lower Higher Output Current Lower Higher Lower Higher Higher Lower 3 Ipeak Ton PFC PFC NCL30002 AC F Start up Resistors EMI Filter/ Rectifier / Surge Suppression Lemi L4 HVDC Filter Caps Output Filter Cap LED + AC2 Cfilter RV MOV Lemi2 Rtop Rin Rbottom AC + AC2 D4 Rfb Ccomp Ct C6 Rstart U MFP Vcc 2 8 Comp DRV 3 CT GND 4 CS ZCD NCL30002 C4 Dvcc R5 Cvcc Vcc Bootstrap Rzcd Rgdrv ZCD Current Sense R8 Dbuck Qbuck Cout Lout Dovp OVP Zener LED Feed Forward Compensation R2 (Optional) Rsense On Time Capacitor Figure 5. Simplified PFC Buck Application 4

5 NCL30002 V CC 2~3 ma ( ) DC V CC NCL Vdc V CC NCL30002 V CC V CC V CC V CC 35 ms V CC Start Threshold 2.5 V Lock Out Threshold 0 V IVCC 2.6 ma dt 2.6 ma 35 ms C 36.2 F dv 2.5 V 35 F V CC 00 Vac 00 Vac 4 Vdc NCL Vdc V CC 4 Vdc/Rstart Rstart C dv dt I 35 F 2.5 Rstart s 4 V s 4 V Rstart 322 k 35 F 2.5 V NCL30002 Vhigh_line2 322 k mw 322 k HV DC Vcc 330 ms Rstar /3 (00 k ) 74 mw V CC Rstart V CC V CC HV DC HV DC HV DC 20 Vac 30 nf/w ESR HV DC 20 Hz LED 20 Hz LED Figure 6 Cree XLamp XP E LED 8 LED V 20 Hz ±20% 40% ±35% 750 ma ±250 ma LED A DC Cout 70 F.62 70% 2 20 Hz 200 F LED ±00% 500 ma 5

6 LED String Voltage (V dc) y =.673x R 2 = Vled Cree XPE Seris Linear (Vled Cree XPE Series) LED String Current (A dc) Figure 6. Typical V I Curve for an 8 LED String V CC NCL30002 V CC V CC LED ( V CC ) V CC 0.2 V 20 V LED LED LED Vout 22~26 Vdc V CC 20 V CC 26 V OUT V CC V 2 Turns Ratio ( ) 0.6 V CC = = 4.4 V dc V CC Vcc EMI NCL ZCD ( 5) ±0 ma 0 ma NCL30002 ±5 ma (Vin_max Vout_min) Turns Ratio Iclamp_max Rzcd (Vin_max Vout_min) Turns Ratio Rzcd Iclamp_max ( ) k A Rzcd Rzcd NCL

7 LED ( ) LED FET 3 2 CrM NCL Ton_max Ton_max Vin Ton_max Vin Constant Ton_max Vin Ton_max Vin Figure Ideal Ton Linear Ton 3.00 Ton_max ( s) Line Voltage (V ac) Figure 7. Ideal Ton_max vs Linear Ton_max Microsoft Excel NCL30002 Design Guide Design Guide Design Guide m s V &b 5.46 s 7

8 FUNCTION BOX Vin F(Vin) = m Vin + b Ton_max Figure 8. NCL30002 Com MFP 270 A + Voff = 0.4 V Vref = 2.5 V PWM + Ct Figure 9. Simplified Block Diagram of Ton Generator Figure 0 OTA Rfb Gm >> OTA Rfb 00 k ( ) Rfb (Rfb 00 ) Rin 0 M Vin 20 Hz Vin Vrms RMS Design Guide Tool 8

9 to Rectified HVDC R top Optional R in R fb U MFP V CC Comp Gdrv CT Gnd CS ZCD C comp NCL30002 C t Dzener C filter R bottom Figure 0. Partial Schematic Showing Feed Forward Control Design Guide Figure. View of the Feedforward Set Up from the Design Guide MFP CrM Ton_max Design Guide L I khz EMI NCL

10 CrM MOSFET 0 CCM MOSFET EM (Trr) CCM CrM T rr CCM Trr 0 Iout Iout A 2 A A 32 Vac 9 Vdc 200 V 400 V 32 Vac T rr V f MURS230T3G 300 V 66% 2 A 50% MOSFET 32 Vac 200 Vds 300 V 300 V 400 V MOSFET 500 V 500 V Rds (on) MOSFET RMS 675 ma MOSFET R DS(on) 25 C Rds (on) 0.5 STDNM50 Design Guide A sat EE6 Figure 2. Inductor Selection Guide from Design Guide 0

11 LED Design Guide Figure 3. View of the Calculated Results from the Design Guide 0.9 LED V CC V CC

12 D VCC + C VCC 2 MFP Comp V CC Gdrv 8 7 R gdrv Q buck 3 4 CT CS Gnd ZCD 6 5 R zcd NCL30002 Over Temperature Protection RT PTC t R sense Figure 4. Over Temperature Foldback Protection PTC PTC EMI EMI 3 Vin lin Pin lin Pin Vin dlin Pin v2 dvin dvin diin Vin2 Pin Vin Pin 9 0 Vin Sin(45 ) Vin V Pin = 22 W ( ) 00 V 00 V Rin W EMI 454 2

13 Hz khz 0 khz 00 khz MHz 0 MHz Figure 5. EMI Filter Simulation Impedance Plot X-cap EMI DC 4 CISPR Class B AC L 470 H F2 0.5 A SB L3 470 H RV2 MOV AC D5 + C7 330 nf C5 330 nf AC2 AC2 L2 470 H Figure 6. EMI Filter Schematic 3

14 OUTPUT CURRENT (A) V Out 27.9 V Out 2.8 V Out LINE VOLTAGE (V ac) Figure 7. Output Current over Line Voltage Vf LED 22~26 Vdc 750 ma Design Guide EMI 0.9 EFFICIENCY (%) Vf = 27.9 V Out Vf = 24.8 V Out Vf = 2.8 V Out LINE VOLTAGE (V ac) Figure 9. Efficiency over Line Voltage and Load 88% POWER FACTOR V Out 24.8 V Out 2.8 V Out LINE VOLTAGE (V ac) Figure 8. Power Factor over Line Voltage 4

15 Figure 20. Typical Input Current Figure 2. Typical Output Current 8 LED LED ±5% LED A DC LED LED 5

16 APPENDIX: SCHEMATIC AND BILL OF MATERIALS AC_L AC_N F 0A5 25 V RV MOV 30 V C7 0 F R3 6.2 k L2 470 H L3 470 H R0 6.2 k R k R7 0 k D4 MB6S AC AC2 R6 93 k + C9 330 nf 250 V Feed Forward Network R2 464 k C0 nf C2 470 pf NPO L 470 H R2 2 M U NCL30002 MFP VCC Comp Gdrv CT GND CS ZCD R 00 k C3 330 nf 250 V R4 00 k R5 0 + C 22 F 35 V R 0 Q2 MMBT3904 R5 00 R6 470 PTC t D MURS360T3G D7 BAS2M3T5G Q STDNM50 R7 22 k R8.00 k R3 6.2 C5 200 F 35 V DC + 25 H R W L4 LED_P D8 SMB33 LED_N Figure 22. Schematic 6

17 Table 2. BILL OF MATERIALS Reference Value Size/Footprint Manufacturer Part Number C 22 F 35 V 20 Various C2 470 pf 50 V NP0 2% 603 Various C3,C9 330 nf 250 V Radial LS = 5 mm Epcos B32529C3334M*** C5 200 F 35 V Radial LS = 7.5 mm Nichicon UHEV22MHD6 C7 0 F X7R 0 V 0% 603 Various C0 nf 25 V NP0 20% 603 Various D MURS360 SMB ON Semiconductor MURS360BT3G D4 MB6S 4 Pin SMD MCC MB6S D7 BAS2DW5 SC88A (SC70 5) ON Semiconductor BAS2DW5TG D8 SMB33 SMB ON Semiconductor SMB33CAT3G F 0.5 A Slow Blow Axial Littelfuse MRTL L, L2, L3 470 H Radial LS = 2.5 mm Wurth L4 25 H EE6 Core Wurth Q STDNM50 DPAK ST STDNM50 Q2 MMBT3904 SOT 23 ON Semiconductor MMBT3904 R, R5 0 % 603 Various R2 464 k % 603 Various R3, R0 6.2 k 5% 805 Various R4 00 k % 206 Various R5 00 % 603 Various R6 93 k % 603 Various R7 22 k 5% 206 Various R8 k % 603 Various R Various R 00 k % 603 Various R2 2M % 805 Various R % 603 Various R k % 603 Various R Epcos B5960A05A062 R7 0 k Gull Wing Top Mnt TTI 22AR0KLFTR RV 30 V Disc 7mm Littelfuse V30LA2P U NCL30002 SOIC 8 ON Semiconductor NCL30002DR2G ENERGY STAR and ENERGY STAR mark are registered U.S. Marks; Microsoft Excel is a registered trademark of Microsoft Corporation; XLamp is a registered of Cree, Inc. ON Semiconductor ON Semiconductor Components Industries, LLC (SCILLC) SCILLC ( ) SCILLC SCILLC SCILLC SCILLC SCILLC SCILLC SCILLC SCILLC SCILLC SCILLC SCILLC PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 563, Denver, Colorado 8027 USA Phone: or Toll Free USA/Canada Fax: or Toll Free USA/Canada orderlit@onsemi.com N. American Technical Support: Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: Japan Customer Focus Center Phone: ON Semiconductor Website: Order Literature: For additional information, please contact your local Sales Representative AND9094JP/D