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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.
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).
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
Board Layout and Connections
TOP SIDE BOTTOM SIDE
80-135 VAC 80-135 VAC
Radj (external) 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
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HV9906DB4
Instructions
OUT, RTN
Connect your LED to these terminals: negative to
OUT, positive to RTN.
E1, E2
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.
DC, AGND
Leave DC, AGND open if dimmer control is not
required. Connect DC and AGND with an adjustable
Schematic Diagram
Resistor R
output current is:
Iout
Setting Output Current (without Dimmer Control)
Output current is preset to 750mA for this board.
Output current can be re-programmed according to
the following equation:
Iout 1
adj can change the output current. The
RRRRRR
+−++
=
RRRR
3)11//(7
⋅+
adj
−++
7861
=
RRRR
⋅
37
RR
⋅
V
adj
)11//(7861
V
1
⋅
R
adj
(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
Page 3
Parts List
Item REF Part Package Manufacturer Part No.
1 B1 Diode Bridge BRIDGE-RH06 Diodes Incorporated RH06 or HD06
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
HV9906DB4
17 D5 Zener, 4.7V SMD DL-35 Diodes Inc. or equivalent ZMM5230B-7
18 D6 TVS, 1.5KW 54V SMC Diodes Inc. or equivalent SMCJ54A-13
19 F1 1/2A, Slow Blow SMD2410 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. 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
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