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HV9906P Datasheet(PDF) 9 Page - Supertex, Inc |
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HV9906P Datasheet(HTML) 9 Page - Supertex, Inc |
9 / 10 page 9 07/23/02 Supertex, Inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 TEL: (408) 744-0100 FAX: (408) 222-4895 www.supertex.com HV9906 Application Information Universal Input Non-Isolated Constant 10mA Average Current LED Lamp Power Supply PS GATE +Vin Vdd AGND HV9906 1mH 220uH Optional 12VDC to 400VDC or 65VAC to 280VAC 1 to 8 LEDs 250 VN2460N8 1uF to 6.8uF 0.01uF 10mA PGND NS 0.1uF C1 D1 D2 D4 D3 C2 L1 L2 C3 C4 MURS120T3 D6 D7 R5 M1 U1 400V 1N4007 D5 MURS120T3 MURS120T3 R1 R2 R3 R4 8M 100k 700k 200k Von - + This circuit provides a constant average current output, which may be used to power LED lamps. The circuit maintains a constant average current and the value of C4 capacitor controls the peak-to- peak ripple, which decreases with increasing capacitor value. If current ripple is permissible then C4 may be omitted. Universal Input Non-Isolated Constant 0.5A Average Current LED Lamp Power Supply PS GATE +Vin Vdd AGND HV9906 56uH 15uH Optional 12VDC to 400VDC or 65VAC to 280VAC 100 IRFBC30AF 1uF to 6.8uF 0.033uF PGND NS 0.047uF C1 D1 D2 D4 D3 C2 L1 L2 C3 C4 MURS160 D6 D7 R5 M1 U1 400V 1N4007 D5 MURS160 MURS160 R1 R2 R3 R4 8M 100k 900k 300k Von LED-1 Row 1 20mA LED-9 Row 1 LED-1 Row 2 20mA LED-9 Row 2 LED-10 Row 2 LED-1 Row 3 20mA LED-10 Row 3 LED-9 Row 3 LED-1 Row 25 20mA LED-9 Row 25 LED-10 Row 25 Q1 Q2 Q3 Q25 NPN Bipolar Transistor Array or Matched 2N2222 Negative Voltage - + This circuit provides 0.5A constant average current output to power 249 LEDs , each operating at 20mA to form a large LED lamp or array. The circuit maintains a constant average current and the value of C4 capacitor controls the peak-to-peak ripple, which decreases with increasing capacitor value. If current ripple is permissible then C4 may be omitted. |
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