HV9906DB4 Off-Line Current Source Controller Introduction The HV9906DB4 provides a constant current of 750mA. It contains all circuitry necessary to demonstrate the features of the HV9906 second order power supply controller. 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-tooutput 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 power converter or other types of two-stage multiconverters. HV9906DB4 demo board features passive power factor correction to PF>0.95, open circuit protection and under voltage lockout. Specification Input Voltage 80 to 135VAC, 60Hz Output Current 750mA ±10% Output Voltage 20V Max Efficiency 64% at Io=750mA, Vin=100VAC The board is optimized for driving a 10V-20V, 750mA load. However, it may be modified to meet custom requirements (up to 80V or 1.5A). Board Layout and Connections TOP SIDE BOTTOM SIDE 80-135 VAC Radj (external) 80-135 VAC Radj (external) 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 07/23/2002 Supertex, Inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 TEL: (408) 744-0100 FAX: (408) 222-4895 www.supertex.com HV9906DB4 Instructions OUT, RTN Resistor Radj can change the output current. The output current is: Connect your LED to these terminals: negative to OUT, positive to RTN. Iout = E1, E2 R1 + R 6 + R8 − R 7 //( R11 + Radj ) R 7 //( R11 + Radj ) ⋅ R3 ⋅ 1V Setting Output Current (without Dimmer Control) Connect 80 to 135VAC, 60Hz line source to these terminals: line to E2, neutral to E1. The input is protected with a 0.5A fuse. Output current is preset to 750mA for this board. Output current can be re-programmed according to the following equation: DC, AGND Leave DC, AGND open if dimmer control is not required. Connect DC and AGND with an adjustable Iout = R1 + R 6 + R8 − R 7 ⋅1V R 7 ⋅ R3 Schematic Diagram Radj (external part) 2 07/23/2002 Supertex, Inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 TEL: (408) 744-0100 FAX: (408) 222-4895 www.supertex.com HV9906DB4 Parts List Item REF Part Package Manufacturer 1 B1 Diode Bridge 2 C1 0.033 uFd, 250V, 10% SMD1913 Panasonic Pen Film ECW-U2333KC9 3 C2 0.22uFd, 250V, 10% SMD2825 Panasonic Pen Film ECW-U2224KCV 4 C3 0.082 uFd, 100V, 10% SMD1913 Panasonic Pen Film ECW-U2333KC9 5 C4 0.022uFd, 50V, 5% SMD1210 Panasonic PPS Film ECH-U1H223JB5 6 C5 0.1uFd, 16V, 5% SMD1210 Panasonic PPS Film ECH-U1C104JB5 7 C5A 0.1uFd, 16V, 5% SMD1210 Panasonic PPS Film ECH-U1C104JB5 8 C6 15uFd, 16V, Tantalum SMD3528 Kemet or equivalent ECS-TICX156R 9 C7 0.01uFd, 50V SMD0805 Panasonic or equivalent ECJ-2VB1H103K 10 C8 0.1uFd, 16V, 5% SMD1210 Panasonic PPS Film ECH-U1C104JB5 11 C8A 0.1uFd, 16V, 5% SMD1210 Panasonic PPS Film ECH-U1C104JB5 12 C9 1500pFd, X7R, 50V SMD0603 Panasonic or equivalent ECJ-1VB1H152K 13 D1 Ultra Fast, 400V, 1A SMB On Semi or equivalent MURS140T3 14 D2 Ultra Fast, 400V, 1A SMB On Semi or equivalent MURS140T3 15 D3 Ultra Fast, 200V, 1A SMB On Semi or equivalent MURS120T3 16 D4 1N4148 SOD123 On Semi or equivalent 1N4148 17 D5 Zener, 4.7V SMD DL-35 Diodes Inc. or equivalent ZMM5230B-7 18 19 D6 F1 TVS, 1.5KW 54V 1/2A, Slow Blow SMC SMD2410 Diodes Inc. or equivalent SMCJ54A-13 Littlefuse R452.500 20 L1 100uH PM5022 J.W. Miller or Coilcraft PM5022-101M 21 L2 100uH PM5022 J.W. Miller or Coilcraft PM5022-101M 22 M1 MOSFET, 400V D2-Pak International Rectifier IRF730AS 23 M2 MOSFET, 350V SOT-89 Supertex DN3535N8 24 Q1 BJT, PNP SOT23 On Semi or equivalent FMMT2907 25 R1 15K ohm, 1% SMD0805 Panasonic or equivalent 26 R2 1.0M Ohm, 1% SMD0805 Panasonic or equivalent 27 R3 0.47 ohm, 1% SMD1206 Panasonic or equivalent 28 R4 10.0M Ohm, 1% SMD0805 Panasonic or equivalent 29 R5 84.6K ohm, 1% SMD0805 Panasonic or equivalent 30 R6 105K ohm, 1% SMD0805 Panasonic or equivalent 31 R7 100K ohm, 1% SMD0805 Panasonic or equivalent 32 R8 15K ohm, 1% SMD0805 Panasonic or equivalent 33 R9 1.4M Ohm, 1% SMD0805 Panasonic or equivalent 34 R10 10.0 Ohm, 1% SMD0805 Panasonic or equivalent 35 R11 100K Ohm, 1% SMD0805 Panasonic or equivalent 36 Rth 0 Ohm SMD0805 Panasonic or equivalent 37 U1 PWM/PFM IC SOIC8 Supertex, Inc. BRIDGE-RH06 Diodes Incorporated Part No. RH06 or HD06 HV9906 3 Rev. A 07/23/2002 Supertex, Inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 TEL: (408) 744-0100 FAX: (408) 222-4895 www.supertex.com