HV9931DB2 User Guide

Supertex inc.
HV9931DB2
LED Driver Demoboard
Input 230VAC // Output 350mA, 40V (14W)
General Description
The HV9931 LED driver is primarily targeted at low to
medium power LED lighting applications where galvanic
isolation of the LED string is not an essential requirement.
The driver provides near unity power factor and constant
current regulation using a two stage topology driven by
a single MOSFET and control IC. Triac dimming of this
design is possible with the addition of some components for
preloading and inrush current shaping.
The DB1 and DB2 Demoboards were designed for a fixed
string current of 350mA and a string voltage of 40V for a load
power of about 14W. The boards will regulate current for an
output voltage down to 0V.
Nominal input voltage for the DB1 is 120VAC, for the DB2
230VAC. Design for universal input (85 to 265VAC) is by
all means possible but does increase cost and size while
lowering efficiency.
The input EMI filter was designed to suppress the differential
mode switching noise to meet CISPR15 requirements.
No specific components were added to suppress currents
of common mode nature. Common mode current can be
controlled in many ways to satisfy CISPR 15 requirements.
featured are output current soft start and protections from
line overvoltage, load overvoltage and open circuit. The
driver is inherently short circuit proof by virtue of the peak
current regulation method.
Specifications
Input voltage:
200VRMS to 265VRMS, 50Hz
Output voltage:
0 to 40V
Output current:
350mA +/-5%
Output power:
14W
Power factor
98%
Total harmonic distortion
EN61000-3-2 Class C
EMI limits
CISPR 15 (see text)
Efficiency
83%
Output current ripple
30%PP
Input overvoltage protection
265VRMS, Non-Latching
Output overvoltage protection
46V, Latching
Switching frequency
80kHzNOM
Dimensions:
3.5” x 3.0” x 1.25”
The board is fitted with a number of optional circuits; a
schematic of a simplified driver is given as well. The circuits
Board Layout and Connections
A
V
V
A
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HV9931DB2
Special Note:
The electrolytic capacitor carries a hazardous voltage for an
extended time after the board is disconnected. The board
includes a 1MΩ resistor placed across the electrolytic capacitor which will slowly discharge the capacitor after disconnection from line voltage. The voltage will fall more or
less exponentially to zero with a time constant of about 100
seconds. Check the capacitor voltage before handling the
board.
 Warning!
Working with this board can cause serious bodily harm or
death. Connecting the board to a source of line voltage will
result in the presence of hazardous voltage throughout the
system including the LED load.
The board should only be handled by persons well aware of
the dangers involved with working on live electrical equipment. Extreme care should be taken to protect against electric shock. Disconnect the board before attempting to make
any changes to the system configuration. Always work with
another person nearby who can offer assistance in case of
an emergency. Wear safety glasses for eye protection.
Connection Instructions
voltage and LED string voltage are more or less constant
as well. Duty cycle and bus voltage do adjust in response to
changes in line or load voltage but are otherwise constant
over the course of a line cycle. With the HV9931, OFF time is
fixed by design, being programmed by an external resistor,
whereas ON time adjusts to a more or less constant value,
being under control of the HV9931 peak current regulator.
Step 1.
Carefully inspect the board for shipping damage, loose
components, etc, before making connections.
Step 2.
Attach the board to the line and load as shown in the diagram.
Be sure to check for correct polarity when connecting the
LED string to avoid damage to the string. The board is short
circuit and open circuit proof. The LED string voltage can
be anything between zero and 40V, though performance will
suffer when the string voltage is substantially lower than the
target of 40V. See the typical performance graphs.
Principles of Operation
The input or buck-boost stage is designed for operation
in discontinuous conduction mode (DCM) throughout the
range of line and load voltage anticipated. This can be
accomplished by making the input inductor sufficiently small.
A well known property of the DCM buck-boost stage, when
operated with constant ON time and constant OFF time, is
that input current is proportional to input voltage, whether
in peak value or average value. This results in sinusoidal
input current when the input voltage is sinusoidal, thereby
giving unity power factor operation when operating from the
rectified AC line voltage.
The output or buck stage is designed for operation in
continuous conduction mode (CCM), operating with about 20
to 30% inductor current ripple. This amount of ripple serves
the needs of the HV9931 peak current controller which relies
on a sloping inductor current for setting ON time, and is of an
acceptable level to high brightness LEDs. Duty cycle is more
or less constant throughout the line cycle as the DC bus
When operated in the anticipated range of line and load
voltage, the MOSFET ON time will be under control of the
output stage current controller, which turns the MOSFET
off when sensing that the output inductor current has
reached the desired peak current level as programmed by
a resistive divider at the CS2 pin. Under certain abnormal
circumstances such as initial run-up and line undervoltage,
which both could lead to the draw of abnormally high line
current, ON time is further curtailed by the action of the CS1
comparator, which monitors the input stage inductor current
against a threshold. This threshold can be a simple DC level
or be shaped in time as is performed on the Demoboard. In
particular, when shaping the CS1 threshold with the shape of
the rectified AC line input voltage waveform, the line current
will be bounded by a more or less sinusoidal line current
envelope which results in sinusoidal input current for low line
and other abnormal conditions.
Step 3.
Energize the mains supply. The board can be connected to
mains directly. Alternatively voltage can be raised gradually
from zero to full line voltage with the aid of an adjustable AC
supply such as a Variac or a programmable AC source.
The HV9931 topology can be viewed as a series connection
of two basic power supply topologies, (1) a buck-boost
stage as first or input stage, for purpose of converting AC
line power into a source of DC power, commonly known as
the DC bus, having sufficient capacitive energy storage to
maintain the bus voltage more or less constant throughout
the AC line cycle, and (2) a buck stage as second or output
stage for powering the LED string, stepping down the DC
bus voltage to the LED string voltage in order to produce a
steady LED string current.
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HV9931DB2
The design exercise of an HV9931 LED driver revolves
around establishing component values for (1) the input and
output stage inductors, (2) a value for the bus capacitor, and
(3) a value for switching cycle OFF time, which together
result in (1) acceptable current ripple at the output stage
(say 30%), (2) an acceptable bus voltage ripple (say 5%),
and (3) an input stage which maintains DCM operation over
the desired line and load voltage range.
simulation, which, allows components to be adjusted in an
iterative manner, starting from an initial guess. The tool allows
quick evaluation of nine standard test cases, exercising the
design over line voltage variation and tolerance variation of
three component parameters.
Mathcad design data can be found at the end of this
document. The data tends to be in good agreement with the
actual Demoboard despite the omission of switching losses
in the model. For this design we can see that the calculated
efficiency is off by say 5 percent likely due underestimation
of switching losses and inductor core and winding losses.
For a given HV9931 design, the bus voltage rises and falls
with like changes in line and load voltage. This is unlike a
two stage design having two transistors and control ICs,
where the bus voltage can be set independent of line and
load voltage variation. If the desired ranges of line and load
voltage are particularly large then the latter topology may be
preferable so as to avoid large variation in bus voltage.
The design of an HV9931 based LED driver is not further
discussed here, except for noting that a semi-automatic
design tool is available in Mathcad form, based on behavioral
A Simplified Version of the Design
The Demoboard can be simplified significantly. Below is a
schematic showing the essential elements of the driver.
Contact Supertex Applications Engineering for guidance in
simplifying the design or for adding functions such as triac
dimmability.
Simplified Schematic Diagram
F11
250mA
AC2
L21
2.2mH
L11
2.2mH
C11
47nF
1
E31
22μF
D31
STTH108A
+
R37
6.8kΩ
C21
47nF
D42
STTH1R06A
M31
SPA02N80C3
R51
205kΩ
1
R62
2.43kΩ
THROV
BT168GW
ZOV
BZX84C43
ANO
A
R61
270mΩ
C
ROV
10kΩ
CAT
C37
100pF
4
Optional Output
Overvoltage Protection
L41
3.9mH
D41
STTH1R06A
C
BR11
RH06-T
2
L31
1.2mH
3
C12
47nF
AC1
D32
STTH108A
VIN
2
8
RT
GATE
IC51
CS1
R68
75kΩ
4
R71
680mΩ
R72
2.67kΩ
CS2
HV9931LG
GND
VDD
PWM
3
6
5
7
R73
75kΩ
A
C51
10µF
Note on Inductors:
can be wound for lowest cost without coil former (bobbin).
They may serve well during the development stage, but may
not be the best choice for final design. Keep these type of
inductors away form any metallic surface such as heatsinks,
PCB copper planes, metallic enclosures, and capacitors, as
these unshielded parts can create high eddy current losses
in these parts. For tightly packaged designs or where inductor losses are an issue, drum core style inductors are not
recommended.
This board was fitted with standard (COTS) inductors. These
are not necessarily an optimal choice but present an expedient way to go when evaluating a design. Custom engineered
parts generally give better performance, particularly with respect to efficiency.
Drum core style inductors, whether in radial or axial leaded
versions, are popular for their ready availability and low cost.
Drum core styles have particularly simple construction and
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AC1
AC2
4
R83
1MΩ
R84
1MΩ
MOV11
430V
R82
13.0kΩ
F11
250mA
C12
47nF
Q82
MMBT2907A
C11
47nF
L11
2.2mH
C81
10nF
TVS11
SMAJ
440CA
2
4
R80
200kΩ
Q81
MMBT2222A
R81
10kΩ
3
1
REC
BR11
RH06-T
DN65
BAV99
C65
10µF
2
1
3
L21
2.2mH
L1D
R68
1MΩ
R88
10MΩ
R87
200kΩ
2
R37
6.8kΩ
Q84
MMBT2907A
VDD
6
3
C51
10µF
HV9931
IC51
VDD
ENA
R51
205kΩ
GATE
4
GATE
CS2
5
PWM
RT
8
D39
MMDB914
7
L41
3.9mH
R90
200kΩ
C72
100pF
R79
100Ω
D42
STTH1R06A
SN2
D79
MMBD914
D41
STTH1R06A
M31
SPA02N80C3
R31
10MΩ
+
E31
22μF
GND
CS1
VIN
1
IDD
R39
100Ω
C37
100pF
D31
STTH108A
R99
1kΩ
C62
100pF
R62
2.43kΩ
R86
100kΩ
Q83
MMBT2222A
R85
100kΩ
Z61
BZX84C7V5
R64
1.3MΩ
R63
75kΩ
R65
1.3MΩ
R61
270mΩ
RS1
C21
47nF
D37
STTH108A
L31
1.2mH
D32
STTH108A
R73
75kΩ
R72
2.67kΩ
R71
680mΩ
RS2
C41
10nF
Z90
BZX84C7V5
Z91
BZX84C47
GND2
GND1
ANO
CAT
HV9931DB2
Schematic Diagram
Supertex inc.
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HV9931DB2
Typical Characteristics
String Current [mA] vs. String Voltage [V]
1000
100
900
90
800
80
200VRMS
70
700
265VRMS
600
60
230VRMS
500
50
400
40
300
30
200
20
200VRMS
100
0
Efficiency [%] vs. String Voltage [V]
0
10
265VRMS
230VRMS
10
20
30
40
0
50
0
10
20
30
40
50
THD [%] vs. String Voltage [V]
PF [%] vs. String Voltage [V]
30
100
90
25
80
200VRMS
230VRMS
265VRMS
70
60
50
265VRMS
20
200VRMS
15
230VRMS
40
10
30
20
5
10
0
0
10
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20
30
40
0
50
5
0
10
20
30
40
50
Supertex inc.
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HV9931DB2
Typical Waveforms (1)
Line Voltage and Current at nominal load (350mA, 40V)
200VRMS
230VRMS
265VRMS
IAC
VAC
Line Voltage and Current at half load (350mA, 20V)
200VRMS
230VRMS
265VRMS
Output Current and Drain Voltage at nominal load (350mA, 40V)
VDRAIN
ILED (Peak)
ILED (Valley)
Output Current and Drain Voltage at half load (350mA, 20V)
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HV9931DB2
Typical Waveforms (2) (120VRMS, 40V, 350mA)
Drain Voltage and LED Current
40µs per div
400µs per div
4µs per div
350mAAVE
ILED
VDRAIN
Drain Voltage and Gate Voltage
40ns per div
4µs per div
40ns per div
VG @ IC51
VGATE
VG @ M31
Turn-ON
VDRAIN
Turn-OFF
Recovery of D41
Recovery of D42
Drain Voltage and Current Sense Voltages of Stages 1 and 2
VRS1
Recovery of D42
VRS2
VDRAIN
Recovery of D41
Drain Voltage and Voltages at Test Points REC, SN3, SN2
VREC
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VSN3
7
VSN2
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HV9931DB2
Typical Waveforms (3) (120VRMS, 40V, 350mA)
Drain Voltage and Voltage at the Test Point L1D (3 points along the AC line cycle)
AT ~ 90°
AT ~ 30°
AT ~ 10°
Clamping action of D37
VDRAIN
VL1D
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HV9931DB2
EMI Signature
Board suspended about 3” above reference plane.
Limit Line:
CISPR 15 Quasi Peak (9kHz to 30MHz)
Detector:
Peak Hold
IF Bandwidth:9kHz
Shielding:
2 copper shields, surrounding the power section on top and bottom of the board, terminated at the source of the MOSFET.
Without shielding :
110dBµV
100dBµV
90
80
66
60
56
50dBµV
10kHz
100kHz
10MHz
1MHz
With shielding :
110dBµV
100dBµV
90
80
66
60
56
50dBµV
10kHz
100kHz
1MHz
The performance graphs above were obtained from the
board not having specific measures to suppress common
mode emissions, such as inclusion of a common mode inductor in the AC line input circuitry. The above graphs show
how shielding can significantly reduce emissions, particu-
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10MHz
larly in the upper frequency range. The shielding also was
instrumental in reducing the lower frequency emissions by
reducing magnetic field coupling from the main inductors
to the EMI filter inductors (EMI filter section kept outside of
shielded area).
9
Supertex inc.
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HV9931DB2
Mathcad Design Data
Corner
x
0
0
1
2
3
4
5
6
7
8
Corner
-
-
-
-
L1
uH
0
1320
1200
1080
1320
1200
1080
1320
1200
1080
L1
-
-
-
-
RL1
mR
0
4400
4400
4400
4400
4400
4400
4400
4400
4400
RL1
-
-
-
-
L2
mH
0
3900
3900
3900
3900
3900
3900
3900
3900
3900
L2
-
-
-
-
RL2
mR
0
3000
3000
3000
3000
3000
3000
3000
3000
3000
RL2
-
-
-
-
ILRF2
%
0
28
28
28
28
28
28
28
28
28
ILRF2
-
-
-
-
C2
uF
0.0
17.6
22.0
26.4
17.6
22.0
26.4
17.6
22.0
26.4
C2
-
-
-
-
NF
x
0
2
2
2
2
2
2
2
2
2
NF
-
-
-
-
LF
uH
0
2200
2200
2200
2200
2200
2200
2200
2200
2200
LF
-
-
-
-
RLF
mR
0
2300
2300
2300
2300
2300
2300
2300
2300
2300
RLF
-
-
-
-
CF
nF
0
47
47
47
47
47
47
47
47
47
CF
-
-
-
-
C1
nF
0
47
47
47
47
47
47
47
47
47
C1
-
C2V
135
-
RS
mR
0
1000
1000
1000
1000
1000
1000
1000
1000
1000
RS
-
C2I
1345
-
VD
mV
0
1500
1500
1500
1500
1500
1500
1500
1500
1500
VD
-
-
-
-
TF
us
0.0
9.1
9.1
9.1
9.1
9.1
9.1
9.1
9.1
9.1
TF
-
-
-
-
RT
kR
0
205
205
205
205
205
205
205
205
205
RT
-
-
-
-
FM
Hz
0
50
50
50
50
50
50
50
50
50
FM
-
-
-
-
VMRMS
V
0
200
200
200
230
230
230
265
265
265
VMRMS
-
-
-
-
IMRMS
mA
0
84
81
78
73
70
68
63
61
59
IMRMS
68
73
59
84
IMMAX
mA
0
125
117
112
107
101
98
92
88
84
IMMAX
98
107
84
125
V3AVG
V
0
40
40
40
40
40
40
40
40
40
V3AVG
40
40
40
40
I3AVG
mA
0
360
350
340
360
350
340
360
350
340
I3AVG
340
360
340
360
PM
W
0.0
16.4
16.0
15.4
16.3
15.8
15.4
16.2
15.7
15.2
PM
15.4
16.3
15.2
16.4
P3
W
0.0
14.4
14.0
13.6
14.4
14.0
13.6
14.4
14.0
13.6
P3
13.6
14.4
13.6
14.4
EFF
%
0.0
87.8
87.8
88.3
88.5
88.7
88.3
88.8
89.4
89.4
EFF
88.3
88.7
87.8
89.4
PF
%
0.0
97.6
98.6
99.0
97.6
98.3
98.6
97.1
97.6
97.7
PF
97.6
98.6
97.1
99.0
THD
%
0.0
9.9
5.7
3.6
7.6
4.5
2.9
5.9
3.6
2.5
THD
2.9
7.6
2.5
9.9
H3
%
0.0
9.7
5.6
3.5
7.5
4.3
2.7
5.8
3.4
2.2
H3
2.7
7.5
2.2
9.7
H5
%
0.0
1.8
0.9
0.6
1.2
0.7
0.5
0.9
0.5
0.5
H5
0.5
1.2
0.5
1.8
TAMIN
us
0.0
3.1
3.3
3.4
2.7
2.8
2.9
2.3
2.4
2.5
TAMIN
2.7
2.9
2.3
3.4
TAMAX
us
0.0
4.0
3.8
3.7
3.2
3.1
3.1
2.6
2.6
2.6
TAMAX
3.1
3.2
2.6
4.0
TFMIN
us
0.0
7.3
9.1
10.9
7.3
9.1
10.9
7.3
9.1
10.9
TFMIN
7.3
10.9
7.3
10.9
TFMAX
us
0.0
7.3
9.1
10.9
7.3
9.1
10.9
7.3
9.1
10.9
TFMAX
7.3
10.9
7.3
10.9
DAMIN
%
0.0
30.0
26.8
23.7
27.0
23.8
21.1
24.2
21.1
18.6
DAMIN
21.1
27.0
18.6
30.0
DAMAX
%
0.0
35.3
29.5
25.2
30.7
25.7
22.1
26.7
22.4
19.2
DAMAX
22.1
30.7
19.2
35.3
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HV9931DB2
Mathcad Design Data (cont.)
Corner
x
0
0
1
2
3
4
5
6
7
8
Corner
-
-
-
-
DC1MAX
%
0.0
99.0
77.6
62.0
88.9
69.3
55.5
79.7
61.6
49.0
DC1MAX
55.5
88.9
49.0
99.0
FSMIN
kHz
0.0
89.0
77.7
68.7
95.4
81.9
71.5
100.9
85.5
74.1
FSMIN
71.5
95.4
68.7
100.9
FSMAX
kHz
0.0
96.3
80.7
70.0
100.5
83.9
72.4
104.4
86.9
74.7
FSMAX
72.4
100.5
70.0
104.4
IL1RMS
mA
0
275
275
273
254
253
254
235
234
234
IL1RMS
253
254
234
275
IL1MAX
mA
0
723
810
897
702
789
883
686
772
864
IL1MAX
702
883
686
897
IL2RMS
mA
0
361
351
342
361
351
342
361
351
342
IL2RMS
342
361
342
361
IL2MAX
mA
0
400
400
400
400
400
400
400
400
400
IL2MAX
400
400
400
400
I2RMS
mA
0
300
282
266
280
263
249
262
245
231
I2RMS
249
280
231
300
V2MIN
V
0
121
145
170
139
166
193
160
191
222
V2MIN
139
193
121
222
V2MAX
V
0
142
160
180
158
179
202
177
202
230
V2MAX
158
202
142
230
V2RELPPR
%
0.0
16.0
9.5
5.8
12.6
7.3
4.6
10.0
5.7
3.5
V2RELPPR
5
13
4
16
ISRMS
mA
0
354
343
333
329
318
310
306
295
287
ISRMS
310
329
287
354
ISMAX
mA
0
1122
1209
1296
1101
1189
1282
1085
1172
1263
ISMAX
1101
1282
1085
1296
VSMAX
V
0
415
433
455
473
496
520
542
568
597
VSMAX
473
520
415
597
IDL1AVG
mA
0
191
170
152
167
148
134
147
129
116
IDL1AVG
134
167
116
191
IDF1AVG
mA
0
117
98
83
103
87
74
92
76
65
IDF1AVG
74
103
65
117
IDR2AVG
mA
0
117
98
83
103
86
73
91
76
64
IDR2AVG
73
103
64
117
IDF2AVG
mA
0
243
252
257
257
264
267
269
274
276
IDF2AVG
257
267
243
276
IRS1RMS
mA
0
167
174
180
153
160
167
141
146
153
IRS1RMS
153
167
141
180
IRS2RMS
mA
0
205
186
169
193
175
159
182
164
149
IRS2RMS
159
193
149
205
Doc.# DSDB-HV9931DB2
A062513
11
Supertex inc.
www.supertex.com
HV9931DB2
Simulated Waveforms (Mathcad)
Corner 0 (100VAC) (High Duty)
Corner 1 (100VAC) (Nom Duty)
Corner 2 (100VAC) (Low Duty)
Corner 3 (120VAC) (High Duty)
Corner 4 (120VAC) (Nom Duty)
Corner 5 (120VAC) (Low Duty)
Corner 6 (135VAC) (High Duty)
Corner 7 (135VAC) (Nom Duty)
Corner 8 (135VAC) (Low Duty)
Drain Voltage Envelope
Rectified Line Voltage
Bus Voltage
Input Inductor
Peak Current
Envelope
Line Voltage
Doc.# DSDB-HV9931DB2
A062513
Line Current
12
Supertex inc.
www.supertex.com
HV9931DB2
Bill of Materials
Qty
REF
Description
Manufacturer
Product Number
1
BR11
RECT BRIDGE GP MINIDIP 600V 0.5A
Diodes Inc
RH06-T
2
C62, C72
CAP CER NP0 50V 10% 0805 100PF
Kemet
C0805C101K5GACTU
2
C41, C81
CAP CER X7R 100V 10% 0805 10NF
Kemet
C0805C103K1RACTU
1
C37
CAP CER NP0 1000V 5% 0805 100PF
Vishay/Vitramon
VJ0805A101JXGAT5Z
2
C51, C65
CAP CER X7R 16V 10% 1206 10µF
Murata
GRM31CR71C106KAC7L
3
C11, C12, C21
CAP MKP 305VAC X2 125C 20% 47NF
EPCOS Inc
B32921A2473M
3
D31, D32, D37
DIODE ULTRAFAST 800V 1A SMA
STMicroelectronics
STTH108A
2
D41, D42
DIODE ULTRAFAST 600V 1A SMA
STMicroelectronics
STTH1R06A
2
D39, D79
DIODE ULTRAFAST HI COND SOT-23
Fairchild Semiconductor
MMBD914
1
DN65
DIODE SW DUAL 75V 350MW SOT23
Diodes Inc
BAV99-7-F
1
E31
CAP ALEL ED RAD10X20 250V 20% 22µF
Panasonic ECG
EEU-ED2E220
1
F11
FUSE SLOW IEC TR5 250MA
Littelfuse Wickmann
37202500411
1
HS
HEATSINK TO220 W/TAB W86 D40 H75 21K
Aavid Thermalloy
574502B03700G
1
IC51
IC LED DRIVER 8L SOIC
Supertex
HV9931LG-G
2
L11, L21
CHOKE SH RAD13MM 15% 2.2MH 520MA
Sumida
RCP1317NP-222L
1
L31
CHOKE RAD 450D 710L 10% 1200µH
Renco
RL-5480-4-1200
1
L41
CHOKE RAD 625D 700L 10% 3.9MH
Renco
RL-5480-5-3900
1
M31
MOSFET N-CH 800V 2A 2.7R TO-220FP
Infineon Technologies
SPA02N80C3
1
MOV11
SUR ABSORBER 10MM 430VDC 2500A ZNR
Panasonic ECG
ERZ-V10D431
2
Q81, Q83
TRANSISTOR GP NPN AMP SOT-23
Fairchild Semiconductor
MMBT2222A
2
Q82, Q84
TRANSISTOR GP PNP AMP SOT-23
Fairchild Semiconductor
MMBT2907A
1
R99
RES 1/8W 0805 1% 1.00KΩ
Panasonic ECG
ERJ-6ENF1001V
2
R39, R79
RES 1/8W 0805 1% 100Ω
Panasonic ECG
ERJ-6ENF1000V
1
R62
RES 1/8W 0805 1% 2.43KΩ
Panasonic ECG
ERJ-6ENF2431V
1
R72
RES 1/8W 0805 1% 2.67KΩ
Panasonic ECG
ERJ-6ENF2671V
1
R81
RES 1/8W 0805 1% 10.0KΩ
Panasonic ECG
ERJ-6ENF1002V
1
R82
RES 1/8W 0805 1% 13.0KΩ
Panasonic ECG
ERJ-6ENF1302V
1
R63, R73
RES 1/8W 0805 1% 75.0KΩ
Panasonic ECG
ERJ-6ENF7502V
2
R85, R86
RES 1/8W 0805 1% 100KΩ
Panasonic ECG
ERJ-6ENF1003V
1
R51
RES 1/8W 0805 1% 205KΩ
Panasonic ECG
ERJ-6ENF2053V
3
R80, R87, R90
RES 1/8W 0805 1% 200KΩ
Panasonic ECG
ERJ-6ENF2003V
2
R64, R65
RES 1/8W 0805 1% 1.30MΩ
Panasonic ECG
ERJ-6ENF1304V
3
R68, R83, R84
RES 1/8W 0805 1% 1.00MΩ
Panasonic ECG
ERJ-6ENF1004V
1
R88
RES 1/8W 0805 1% 10.0MΩ
Vishay/Dale
CRCW080510M0FKEA
Doc.# DSDB-HV9931DB2
A062513
13
Supertex inc.
www.supertex.com
HV9931DB2
Bill of Materials (cont.)
Qty
REF
Description
Manufacturer
Product Number
1
R37
RES 1/4W 1206 5% 6.8KΩ
Panasonic ECG
ERJ-8GEYJ682V
1
R31
RES 1/4W 1206 1% 10.0MΩ
Vishay/Dale
CRCW120610M0FKEA
1
R61
RES 1/4W 0805 1% .27Ω
Susumu Co Ltd
RL1220S-R27-F
1
R71
RES 1/4W 0805 1% .68Ω
Susumu Co Ltd
RL1220S-R68-F
1
TVS11
DIODE TVS BIDIR SMA 400W 5% 440V
Littelfuse Inc
SMAJ440CA
2
Z61, Z90
DIODE ZENER 350MW SOT-23 7.5V
Diodes Inc
BZX84C7V5-7-F
1
Z91
DIODE ZENER 350MW SOT-23 47V
Diodes Inc
BZX84C47-7-F
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-HV9931DB2
A062513
14
1235 Bordeaux Drive, Sunnyvale, CA 94089
Tel: 408-222-8888
www.supertex.com