Ultra small size Adjustable output high voltage power supply
2.5W to 3W Mid-high voltage DC-DC converter
0V to 180
V
､300
V
､350V MHV Series
The MHV series is the first high voltage power supply in the industry to use the latest
SMT (surface mount technology) making the size 1/5 to 1/6 of the normal product, with
an adjustable output voltage type mid-high voltage DC-DC converter. Output voltage can
be controlled using an external voltage or external resistor. The MHV series has adopted
a 5 sided metallic shield, with lower ripple and lower noise.
■Features
･PCB mounting type ･Adopted a 5 sided metallic shield case
･Output capacity 2.5W to 3W ･100% Burn in test
･Over current protection ･Adjustable voltage using an external voltage
･Worlds smallest size ･Low ripple noise of 30mVp-p
･Low price ･High reliability, long life
･UL certified product (UL File No. E305960)
■Model/Rating
Note1: The output voltage will be controlled by applying the Vcont voltage. Using an adjustable resistor or an external voltage, voltage should be applied on the Vcont pin
in order to control the output voltage. When Vcont voltage=0V the output voltage (output residual voltage) should be less than 0.5% of the max output voltage(I/O rated).
■Test circuit ■ Block diagram
Warning1: The ground line (2pin, 5pin) between the input/output, and the case
are internally connected. Warning2: Vref is 4V ±0.3V (When external VR=5KΩ)
1
BHV20081113
12V
+
+
+Vin
-Vin
Vout (+ or -)
Vout(com)
Vcont
Vref
Load
1
2
6
5
3
4
DC-AC
switching
circuit
High voltage
oscillating
trance
High voltage
rectification
Control IC
output voltage control
over current protection
standard voltage
generating part
Voltage detection
Case
External volt. (0
〜
4V)
or
VR (5K
Ω
)
12V
+Vin
-Vin
Vout (+ or -
）
Vout (Com)
Vref Vcont
Load
1
2
（
OPEN
）
4
5
3
+
C1 C2
6
+
C1=47
μ
F
C2=4700pF
Output voltage control
(Apply 0V to 4V)
MHV
Line regulation
Load regulation
Temp regulation
Over current protection
Output voltage accuracy
Usage temp range
Storage temp range
Usage humidity range
Isolation between input/output
MTBF expected value
Output voltage control
180V type
：
0.5% typ. 300V, 350V type : 0.2% typ.(Load current varying from 0% to 100%)
±
0.01%/
℃
typ.(Temp varying from -10
℃
to +50
℃
)
-25
℃
to
+85
℃
480,000H min. (Bellnix MTBF formula diagram)
Non isolated type (2pin-5pin and the case are connected internally)
20% to 95%RH(no dewing)
External voltage 0V to +4V or an external resistor 5K
Ω
to adjust
Below
±
5% (Rated output, rated load, and Vcont=4.0V)
Letter
フ
characteristic, auto restart circuit at 105% or more
0.02% typ.(Input current varying from +10.8V to +13.2V)
-10
℃
to
+60
℃
(Derating required for temp higher than +50
℃
)
Output voltage
(Vdc) Note1
Case
Model name
10.8 to 13.2 0 to +180 12 M-8
Output
current
(mA)
Load resistor
(k
Ω
) min
Output
capacity
(W)
Input
current
(mA) typ
Ripple noise
(mVp-p) typ
Input voltage
(Vdc)
2.7 350 30
MHV12-180S15P
MHV12-180S15N
MHV12-300S10P
MHV12-300S10N
0 to -180
3.0
3.0
350
395
395
30
30
30
MHV12-350S07P
MHV12-350S07N
2.5
2.5
330
330
30
30
0 to +300
0 to -300
0 to 15
30
50
M-8
M-8
M-8
M-8
M-8
10.8 to 13.2
10.8 to 13.2
10.8 to 13.2
10.8 to 13.2
10.8 to 13.2
0 to +350
0 to -350
0 to 15
0 to 10
0 to 10
0 to 7
0 to 7
12
30
50
2.7
MHV Series
■Specifications
■Model/Dimensions/Pin configuration (M-8 case)
1)Pin
Weight : 46g typ. Material : Phosphorous bronze
Unit : mm Treatment：Ni base Au coating
Tolerances unless 2)Case
otherwise specified:±0.5 Material : Brass
Treatment : Nickel coating
■Standard usage instructions ■Over current protection
MHV Series (180V, 300V, 350V)
The MHV series has a over load and load short protection
installed, which is the over current protection. When the
product status is in over load or load short mode, the
output voltage will decrease, and once the problem
has been removed, the voltage will increase again.
The MHV series does not require any external parts,
however when the impedance is high, for example:
the distance between the power supply and converter
is long, the input line is thin, or the input side has a filter
then connecting a capacitor C1 to the input side is
recommended.
Place the capacitor as close as possible to the
converter pin side, to lower the lead inductance.
2
BHV20081113
100
80
60
40
20
00Output current
(lo)
100%
100%
output
50%
output
Output voltage set value
(%)
MHV
series
Over current protection
characteristic
Vout (com)
pin-NO. pin name
+Vin
-Vin
Vcont
Vref
Vout (+ or -)
2.54
×
3=7.62
(4.44)
12V
+Vin
-Vin
Vout (+ or -
)
Vout (Com)
Vref Vcont
Load
1
2
(OPEN)
4
5
3
+
C1 C2
6
+
C1=47
μ
F
C2=4700pF
Output voltage control
(apply 0V to 4V)
MHV
UL Certified product
(
UL File No. E305960
)
■Recommended pin pattern
■
Setting output voltage and adjusting feature
The MHV series output voltage can be adjusted by using an
external voltage or external adjustable resistor.
①The MHV series uses a metallic case. When soldering
to a double-sided PCB, the wiring for the converter should
be on the soldering side.
Also, this converter will generate high voltages so the
creepage distance should also be taken into account
when designing.
②When mounting to a double-sided PCB, the high voltage
output pin and land should be as small as possible.
③The MHV series case should be connected to the
-Vin and Vout (Com).
④The metallic case does not need to be touching anything.
However, when using and making contact with the metallic
case, the anti land impedance should be lowered.
■Vref pin (standard voltage output)
When controlling the output voltage with an adjustable resistor,
this pin is used. Vref has a standard output voltage of 4V.
In this case, the external adjustable resistor is 5KΩ.
Since the resistance value from the external adjustable resistor
will decide the output voltage with the effect of the specified
value, use a resistance value with an accuracy of 5KΩ±5%.
The type of resistor does not matter, as long as it is 5KΩ,
however one with a good temp coefficient is recommended.
●The above characteristics (Output voltage -VR resistance value
characteristic) graph is an indication of the resistance value R1
and R2.When setting the voltage to a set rate using a stable
resistor, first decide the adjustable resistor R1 and R2.
●Do not apply voltage higher than 4V+5% on the Vcont.
●Choose an adjustable resistor appliance with good temp characteristics.
●When the resistance value for the adjustable resistor is 5.0KΩ, the max
output voltage of 6.0V which is 100%, should be applied to Vcont pin.
Since the max output voltage largely affects the margin of error for the
resistance value, set the resistance value at 5.0KΩ±5%.
3
BHV20081113
79.6
17.7815.2427.94
2.54
×
3=7.62
6
−
:
φ
1.2 2
−
:
φ
2.5
Hold
diameter
Hold
diameter
100%
80%
60%
40%
20%
0%
Output voltage
−
VR resistance value characteristic
Output voltage
VR resistance value
R1
5K
Ω
R2
0K
Ω
0K
Ω
5K
Ω
12V
+Vin
-Vin
Vout (+ or -)
Vout (Com)
Vref Vcont
Load
1
2
4
5
3
+
C1 C2
6
+
C1=47
μ
F
C2=4700pF
Output voltage
control
Apply 0v to 4V
or
VR (5K
Ω
)R1 R2
MHV
Vout (Com)
Vcont
Vref 34
Standard voltage
generation circuit
External adjustable resistor (5.0K
Ω
)
5
MHV
series
Output control voltage
Output voltage
−
Output control voltage
characteristic
0V
100%
80%
60%
40%
20%
0%
Output voltage
4V
3V
2V1V
MHV Series
■Temp derating ■Decreasing the output noise further
When using the product where the ambient temp is The MHV series does need any external parts, however
higher than 50°C, follow the derating graph below, to lower the output noise farther, connect a
increasing the load resistance as the temp increases. capacitor C2 like the figure below.
The minimum load resistance value is specified for each series.
When lowering the output noise, the wiring of the input
and output should be as short as possible. Place C2
closest to the load, paying attention to creepage and
clearance distances.
① Choose a capacitor with a high-frequency when adding
to the input.
② Earth (COMMON) line should be thick and short in the
■Preventing reverse connections pattern design to lower the common impedance.
The converter may break if the polarities are reversed. ③ The capacitor which is connected to the output side
If there is a possibility in which the connections maybe should be able to withstand the pressure, when
reversed, connect a diode and fuse like below. connected to the loadside. At this time, the capacitor lead
should be shortened. Also when the load response time
is a problem, please be aware of the time constant.
■Safety standards
The MHV series has been certified with the UL／c-UL.
･UL60950-1 1st Ed.
･c-UL(CSA22.2 No.60950-1-03 1st Ed.)
When using this product as a recognized (certified) product,
an input fuse should be mounted like below.
■Recommended solder conditions
Soldering conditions for each part are as follows:
①Using a soldering iron 340 to 360°C 5 sec.
②Using a soldering tub 230 to 260°C 10 sec.
Choose a fuse from below:
･UL Listed products
･DC250V､Rated current 2A type 4
BHV20081113
-20 -10 0 +10 +20 +30 +40 +50 +60
100
80
60
40
20
0
Ambient temp (
℃
)
Though the system may start, reliability is not guranteed.
Output derating
(%)
12V
+Vin
-Vin
Vout (+ or -)
Vout (Com)
Vref Vcont
Load
1
2
(OPEN)
4
5
3
+
C1 C2
6
+
C1=47
μ
F
C2=4700pF
Output voltage control
(Apply 0V
～
4V)
MHV
12V
+Vin
-Vin
Vout (+ or -)
Vout (Com)
Vref Vcont
Load
1
2
(OPEN)
4
5
3
+
C1
C2
6
+
C1=22
〜
47
μ
F
C2=0.047
〜
0.1
μ
F
Output voltage control
(Apply 0V to 4V)
MHV
12V
+
Fuse
+Vin
-Vin
MHV
Point!
