HV9931DB5

Supertex inc. HV9931DB5 Universal Input, Single High Brightness, LED Driver Demoboard General Description The Supertex HV9931DB5 demoboard is a high brightness (HB) LED power driver to supply one HB LED, using the HV9931 IC from either a 110 or 220VAC supply. The HV9931DB5 is ideal for incandescent retrofit applications, as it features a very small size and a low component count. Specifications Parameter Value Input 90 – 265V AC, 50/60Hz LED current set point 350mA ± 10% Maximum output voltage The HV9931DB5 avoids the use of electrolytic capacitors, which reduce the lifetime of the circuit in high ambient temperatures (which would be found in the base of a bulb). The demo board can be used to test the performance of the HV9931 as a constant current driver to power LEDs. 4.0V variable (constant off-time, TOFF = 8.0μs) Switching frequency Board dimensions OD = 29mm, HT = 15mm The HV9931DB5 uses a unique cascaded converter circuit, with a single active switch, to achieve the high step down conversion ratio required for operating low voltage LEDs from a high input voltage. This circuit allows the converter to operate at a high switching frequency, about 120kHz, while still regulating the output current at all times. The HV9931DB5 supplies 350mA to a 4.0V(max) LED with input voltages ranging from 90 – 265VAC 50/60Hz. Board Layout and Connections C1 D2 D3 Q1 R12 U1 C4 C5 C3 BR1 R1 L3 C2 R9 R2 L2 R3 R8 R10 L1 D1 D6 R11 AC1 MOV1 AC2 R4 LEDLED+ POS AC Line 90 -260 VAC Connections: 1. Connect the universal input to the AC IN terminals. 2. Connect the output to the LED terminals: - Red wire to anode of LED - Black wire to cathode of LED. Doc.# DSDB-HV9931DB5 A032713 Supertex inc. www.supertex.com HV9931DB5 Testing the HV9931DB5: 300mA. This drop in the current is due to the demo board turning off when the instantaneous input voltage is less than 40V. This dropout at low voltages causes the average current to drop by about 50mA. The output current can be increased or decreased by increasing the value of resistor R10 proportionally. Place an ammeter in series with the LED to measure the LED current. The LED should glow when the AC power is turned on. Note on Current Measurement: The HV9931DB5 is designed to regulate the output current at 350mA (the recommended current level for most 1.0W HB LEDs). This can easily be verified by applying a DC voltage greater than 50V at the input of the demo board. However, when the output current is measured with an AC waveform, the measured current is typically around Open LED Protection: The HV9931DB5 is not protected against open LED conditions. Leaving the LED terminals open while applying an input voltage will damage the circuit. Fig. 1: Output Current at 120V Input Voltage Fig. 2: Output Current at 240V Input Voltage Fig. 3: Input Voltage and Current Waveforms at 120VAC Input Doc.# DSDB-HV9931DB5 A032713 2 Supertex inc. www.supertex.com HV9931DB5 Fig. 4a: Conducted EMI test (CISPR 15) at 120VAC Fig. 4b: Conducted EMI test (CISPR 15) at 240VAC Schematic Diagram D1 AC1 R1 200Ω BR1 AC2 MOV1 430V R2 200Ω - L3 L1 2200µH 470µH + C2 0.033µF 400V R3 10Ω 1 2 VIN CS1 D3 BYD77D R4 1.0Ω C4 4.7µF 10V LED+ 4 3 GATE GND CS2 8 RT R10 1.0kΩ 7 HV9931 R8 50kΩ 6 C5 0.1µF 50V LED- 470µH R12 178kΩ D6 33V R8 35.7kΩ BYD57J C1 0.15µF Q1 250V IRFRC20 C3 0.1µF 400V L2 D2 BYD57J PWMD VDD 5 R11 19.1kΩ HV9931DB5 PCB Layers Top Layer Doc.# DSDB-HV9931DB5 A032713 Bottom Layer 3 Supertex inc. www.supertex.com HV9931DB5 Bill of Materials Quan Ref Des Description Package Manufacturer Manufacturer’s Part Number 1 BR1 Rectifier Bridge GP 600V 0.8A MiniDIP Diodes Inc HD06-T 1 C1 Capacitor 150nF 250VDC polyester film TH Panasonic ECQ-E2154KB 1 C2 Capacitor 33nF 400VDC polyester film TH Panasonic ECQ-E4333KF 1 C3 Capacitor 100nF 400VDC polyester film TH Panasonic ECQ-E4104KF 1 C4 Capacitor 4.7μF 10VDC ceramic X7R 1206 Murata Electronics GRM31CR71A475MA01L 1 C5 Capacitor 0.1μF 50VDC ceramic X7R 1206 Kemet C0805C103K5RACTU 2 D1, D2 Diode ultra fast SW 600V 1A SOD87 Philips BYD57J 1 D3 Diode ultra fast SW 200V 2A SOD87 Philips BYD77D 1 D6 Diode Zener 33V 500mW SOT-123 Diodes Inc BZT52C33-7 1 Q1 MOSFET 600V 2A I-PAK TH IR IRFUC20 1 U1 LED Driver IC SO-8 Supertex Inc HV9931LG 1 MOV1 Varistor 275V RMS TH Littelfuse Inc V430MA7B 2 L1, L2 Inductor radial 470μH TH C&D Technologies 17474 1 L3 2.2mH, 64mA, axial TH Central Technologies CTH6-222K 2 R1, R2 Resistor 200Ω 1/4W 5% Surge 1206 Panasonic 9C12063A2000FKHFT 1 R3 Resistor 10Ω 1/8W 1% 0805 Yageo America RC0805FR-0710L 1 R4 Resistor 1.0Ω 1/4W 1% 1206 SMD 1206 Yageo America 9C12063A1R0FKHFT 1 R9 Resistor 50.0kΩ 1/8W 1% 0805 Yageo America RC0805FR-0750KL 1 R11 Resistor 19.1kΩ 1/8W 1% 0805 Yageo America RC0805FR-0719K1L 1 R8 Resistor 35.7kΩ 1/8W 1% 0805 Yageo America RC0805FR-0735K7L 1 R10 Resistor 1.0kΩ 1/8W 1% 0805 Yageo America RC0805FR-071K0L 1 R12 Resistor 178kΩ 1/8W 1% 0805 Yageo America RC0805FR-07178KL Supertex inc. does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such applications unless it receives an adequate “product liability indemnification insurance agreement.” Supertex inc. does not assume responsibility for use of devices described, and limits its liability to the replacement of the devices determined defective due to workmanship. No responsibility is assumed for possible omissions and inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications refer to the Supertex inc. (website: http//www.supertex.com) Supertex inc. ©2013 Supertex inc. All rights reserved. Unauthorized use or reproduction is prohibited. Doc.# DSDB-HV9931DB5 A032713 4 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com