HV9906DB3 Off-Line PFC Current Source Controller Introduction Features The Supertex HV9906DB3 demo board is a power factor corrected (PFC) LED driver using the HV9906 IC. A power converter of the demo board consists of an input buck-boost stage and an output buck stage. The output voltage polarity is negative. Due to its unique quadratic input-to-output DC voltage transfer ratio, the converter can operate directly off AC line to produce low-voltage output without need for electrolytic capacitors. The HV9906 is designed for optimally controlling this type of a power converter or other types of two-stage multi-converters. HV9906DB3 demo board features passive power factor correction to PF>0.95. The board is optimized for driving a 500mA (700mA max.) LED array. (Forced cooling or encapsulation is required to achieve an output current higher than 500mA.) • • • • Off-Line Transformerless Power Conversion Power Factor Correction to PF>0.95 Soft Start Low Inrush Current on Start Specification Input Voltage 80 to 135VAC, 47-63 Hz or 100 to 200VDC Output Current 500mA ±10% (700mA max.) Output Voltage 10V max. Power Factor >0.95 Total AC Line Harmonic Distortion (THD) <15% Efficiency 60% (Vo=10V, Io=0.5A, Vin=100VAC) Board Layout and Connections ~ WARNING!!! Do not connect to scope ground or to the ground of other earth-grounded instruments. Doing so will short the AC line, resulting in damage to the circuit and/or instruments. Either use an isolation transformer on the AC line, use a differential probe, or use a floating, battery-powered instrument to make measurements. WARNING!!! No galvanic isolation. Dangerous voltages are present when connected to the AC mains. 1 09/05/2002 Supertex, Inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 TEL: (408) 744-0100 FAX: (408) 222-4895 www.supertex.com HV9906DB3 Instructions Setting Output Current OUT, RTN Output current is preset to 500mA for this board. Output current can be re-programmed by selecting R3 according to the following equation: Connect your LED to these terminals. Make sure that it is connected in the polarity shown on the diagram above. I OUT = E1, E2 R 6 + R1 + R 8 − R 7 ⋅ 1V R 7 ⋅ R3 However, the board must be forced cooled or encapsulated using thermally conductive encapsulant to operate continuously at output current higher than 500mA. Connect 80 to 135VAC line source to these terminals. The input is fuse protected to 0.5A. Schematic Diagram D1 D2 MURS140 B1 F1 1/2A 100uH D3 C1 C2 .033uFd .22uFd OUT M1 R9 MURS120 IRFR320 10 Q1 MMBT2907 D7 30V R4 LED ARRAY C9 10M RTN R10 0.01uF 1M 1 U1 8 6 2 C4&C4A 0.2uFd 90.9K 3 C7 HV9906 4 5 R1 100pF D6 C11 7 0.47uFd C6 R2 100K C10 D5 1N4148 R5 R6 R7 100K 1nF 4.7V D8 R8 14.7K 14.7K C5&C5A C8&C8A 0.2uFd 0.2uFd R3 0.47 1N4148 E1 47uH MURS120 C3 .082uFd L1 E2 L2 15uFd 10K C4&C4A, C5&C5A, C8&C8A are two 0.1uF capacitors in parallel. 2 09/05/2002 Supertex, Inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 TEL: (408) 744-0100 FAX: (408) 222-4895 www.supertex.com HV9906DB3 Part List Item Reference Part Package Manufacturer Part No. 1 B1 Diode Bridge SMD DF-S Diodes Incorporated or equivalent DF04S 2 C1 0.033 uF, 100V, 10% SMD1913 Panasonic Pen Film ECW-U2333KC9 3 C2 0.22uF, 250V, 10% SMD2825 Panasonic Pen Film ECW-U2224KCV 4 C3 0.082 uF, 100V, 10% SMD1913 Panasonic Pen Film ECW-U1823KC9 5 C4 0.1uF, 16V, 5% SMD1210 Panasonic PPS Film ECH-U1C104JB5 6 C4A 0.1uF, 16V, 5% SMD1210 Panasonic PPS Film ECH-U1C104JB5 7 C5 0.1uF, 16V, 5% SMD1210 Panasonic PPS Film ECH-U1C104JB5 8 C5A 0.1uF, 16V, 5% SMD1210 Panasonic PPS Film ECH-U1C104JB5 9 C6 15 uF, 16V, 10%, Tantalum SMD3528 Kemet or equivalent 10 C7 0.47uF Ceramic X7R 16V SMD0805 Panasonic or equivalent 11 C8 0.1uF, 16V, 5% SMD1210 Panasonic PPS Film ECH-U1C104JB5 12 C8A 0.1uF, 16V, 5% SMD1210 Panasonic PPS Film ECH-U1C104JB5 13 C9 0.01uF, 50V SMD0805 Panasonic or equivalent 14 C10 100pF, NPO, 50V SMD0603 Panasonic or equivalent 14 C11 1000pF, NPO, 50V SMD0603 Panasonic or equivalent 15 D1 Ultra Fast, 400V, 1A SMB On Semi or equivalent MURS140T3 16 D2 Ultra Fast, 200V, 1A SMB On Semi or equivalent MURS120T3 17 D3 Ultra Fast, 200V, 1A SMB On Semi or equivalent MURS120T3 18 D5 1N4148 19 D6 Zener, 4.7V SMD DL-35 Diodes Inc. or equivalent ZMM5230B 20 D7 Zener, 30V SMD DL-41 Diodes Inc. or equivalent ZM4751A 21 D8 1N4148 SOD123 On Semi or equivalent 1N4148 22 F1 1/2A, Slow Blow SMD2410 Littlefuse R452.500 23 L1 100uH, 1.7A SMD Sumida CDRH127-101MC 24 L2 47uH, 1.8A SMD Sumida CDRH125-470MC 25 M1 MOSFET, 400V, 3.1A D-Pak International Rectifier IRFR320 26 Q1 BJT, PNP SOT23 On Semi or equivalent MMBT2907 27 R1 14.7K ohm, 1% SMD0805 Panasonic or equivalent 28 R2 10.0K Ohm, 1% SMD0805 Panasonic or equivalent 29 R3 0.47 ohm, 5% SMD1206 Panasonic or equivalent 30 R4 10.0M Ohm, 1% SMD0805 Panasonic or equivalent 31 R5 90.9K ohm, 1% SMD0805 Panasonic or equivalent 32 R6 100K ohm, 1% SMD0805 Panasonic or equivalent 33 R7 100K ohm, 1% SMD0805 Panasonic or equivalent 34 R8 14.7K ohm, 1% SMD0805 Panasonic or equivalent 35 R9 10.0 Ohm, 1% SMD0805 Panasonic or equivalent 36 R10 1.0M Ohm, 1% SMD0805 Panasonic or equivalent 37 U1 PWM/PFM IC SOD123 On Semi or equivalent SOIC8 Supertex, Inc. 1N4148 HV9906 3 09/05/2002 Supertex, Inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 TEL: (408) 744-0100 FAX: (408) 222-4895 www.supertex.com