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| HV9906DB3 Off-Line PFC Current Source Controller Introduction 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.) Features * * * * Off-Line Transformerless Power Conversion Power Factor Correction to PF>0.95 Soft Start Low Inrush Current on Start Specification Input Voltage Output Current Output Voltage Power Factor Total AC Line Harmonic Distortion (THD) Efficiency 80 to 135VAC, 47-63 Hz or 100 to 200VDC 500mA 10% (700mA max.) 10V max. >0.95 <15% 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 OUT, RTN Connect your LED to these terminals. Make sure that it is connected in the polarity shown on the diagram above. E1, E2 Connect 80 to 135VAC line source to these terminals. The input is fuse protected to 0.5A. Setting Output Current Output current is preset to 500mA for this board. Output current can be re-programmed by selecting R3 according to the following equation: I OUT = 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. Schematic Diagram D1 D2 L2 B1 L1 E2 F1 C1 .033uFd MURS140 MURS120 C3 .082uFd 47uH OUT 100uH C2 .22uFd D3 1/2A E1 R9 10 M1 IRFR320 MURS120 Q1 MMBT2907 D7 30V R4 C9 LED ARRAY RTN 10M 0.01uF R10 1M 1 2 8 U1 6 R6 100K R1 R8 R5 D5 1N4148 C4&C4A 0.2uFd C7 0.47uFd C6 R2 10K C10 3 14.7K D6 14.7K HV9906 4 7 5 100pF C11 1nF R7 C5&C5A 0.2uFd C8&C8A 0.2uFd 90.9K 4.7V R3 100K D8 1N4148 0.47 15uFd 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 1 2 3 4 5 6 7 8 9 10 11 12 13 14 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 B1 C1 C2 C3 C4 C4A C5 C5A C6 C7 C8 C8A C9 C10 C11 D1 D2 D3 D5 D6 D7 D8 F1 L1 L2 M1 Q1 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 U1 Part Diode Bridge 0.033 uF, 100V, 10% 0.22uF, 250V, 10% 0.082 uF, 100V, 10% 0.1uF, 16V, 5% 0.1uF, 16V, 5% 0.1uF, 16V, 5% 0.1uF, 16V, 5% 0.47uF Ceramic X7R 16V 0.1uF, 16V, 5% 0.1uF, 16V, 5% 0.01uF, 50V 100pF, NPO, 50V 1000pF, NPO, 50V Ultra Fast, 400V, 1A Ultra Fast, 200V, 1A Ultra Fast, 200V, 1A 1N4148 Zener, 4.7V Zener, 30V 1N4148 1/2A, Slow Blow 100uH, 1.7A 47uH, 1.8A MOSFET, 400V, 3.1A BJT, PNP 14.7K ohm, 1% 10.0K Ohm, 1% 0.47 ohm, 5% 10.0M Ohm, 1% 90.9K ohm, 1% 100K ohm, 1% 100K ohm, 1% 14.7K ohm, 1% 10.0 Ohm, 1% 1.0M Ohm, 1% PWM/PFM IC Package Manufacturer Part No. ECW-U2333KC9 ECW-U2224KCV ECW-U1823KC9 ECH-U1C104JB5 ECH-U1C104JB5 ECH-U1C104JB5 ECH-U1C104JB5 SMD DF-S Diodes Incorporated or equivalent DF04S SMD1913 Panasonic Pen Film SMD2825 Panasonic Pen Film SMD1913 Panasonic Pen Film SMD1210 Panasonic PPS Film SMD1210 Panasonic PPS Film SMD1210 Panasonic PPS Film SMD1210 Panasonic PPS Film SMD0805 Panasonic or equivalent SMD1210 Panasonic PPS Film SMD1210 Panasonic PPS Film SMD0805 Panasonic or equivalent SMD0603 Panasonic or equivalent SMD0603 Panasonic or equivalent SMB SMB SMB On Semi or equivalent On Semi or equivalent On Semi or equivalent MURS140T3 MURS120T3 MURS120T3 1N4148 ZMM5230B ZM4751A 1N4148 R452.500 CDRH127-101MC CDRH125-470MC IRFR320 MMBT2907 ECH-U1C104JB5 ECH-U1C104JB5 15 uF, 16V, 10%, Tantalum SMD3528 Kemet or equivalent SOD123 On Semi or equivalent SMD DL-35 Diodes Inc. or equivalent SMD DL-41 Diodes Inc. or equivalent SOD123 On Semi or equivalent SMD2410 Littlefuse SMD SMD D-Pak SOT23 Sumida Sumida International Rectifier On Semi or equivalent SMD0805 Panasonic or equivalent SMD0805 Panasonic or equivalent SMD1206 Panasonic or equivalent SMD0805 Panasonic or equivalent SMD0805 Panasonic or equivalent SMD0805 Panasonic or equivalent SMD0805 Panasonic or equivalent SMD0805 Panasonic or equivalent SMD0805 Panasonic or equivalent SMD0805 Panasonic or equivalent SOIC8 Supertex, Inc. HV9906 3 09/05/2002 Supertex, Inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 TEL: (408) 744-0100 FAX: (408) 222-4895 www.supertex.com |
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