Ultra small size Adjustable output high voltage power supply
2.5W to 3W Mid-high voltage DC-DC converter
0V to 180V、300V、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
Model name
MHV Series
MHV12-180S15P
MHV12-180S15N
Input voltage
(Vdc)
Output voltage
(Vdc) Note1
10.8 to 13.2
10.8 to 13.2
0 to +180
0 to -180
MHV12-300S10P
MHV12-300S10N
10.8 to 13.2
10.8 to 13.2
0 to +300
0 to -300
MHV12-350S07P
10.8 to 13.2
0 to +350
MHV12-350S07N
10.8 to 13.2
0 to -350
Output
current
(mA)
Load resistor
(kΩ) min
Output
capacity
(W)
2.7
2.7
Input
current
(mA) typ
Ripple noise
(mVp-p) typ
Case
30
30
30
M-8
M-8
0 to 15
0 to 15
0 to 10
12
12
30
3.0
350
350
395
0 to 10
30
3.0
395
30
M-8
0 to 7
0 to 7
50
50
2.5
330
30
M-8
2.5
330
30
M-8
M-8
■Specifications
0.02% typ.(Input current varying from +10.8V to +13.2V)
Line regulation
180V type : 0.5% typ. 300V, 350V type : 0.2% typ.(Load current varying from 0% to 100%)
Load regulation
Temp regulation
Over current protection
±0.01%/℃ typ.(Temp varying from -10℃ to +50℃)
Letter フ characteristic, auto restart circuit at 105% or more
Output voltage accuracy
Below ±5% (Rated output, rated load, and Vcont=4.0V)
Output voltage control
External voltage 0V to +4V or an external resistor 5KΩ to adjust
-10℃ to +60℃(Derating required for temp higher than +50℃)
-25℃ to +85℃
Usage temp range
Storage temp range
20% to 95%RH(no dewing)
Non isolated type (2pin-5pin and the case are connected internally)
Usage humidity range
Isolation between input/output
MTBF expected value
480,000H min. (Bellnix MTBF formula diagram)
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
1
+Vin
Vout (+ or -)
6
+Vin
1
+
12V
MHV
C1
C2
Load
+
-Vin
Vref
4
(OPEN)
Vout (Com)
Vcont
3
5
-Vin
C1=47μF
C2=4700pF
High voltage
oscillating
trance
are internally connected. Warning2: Vref is 4V ±0.3V (When external VR=5KΩ)
Vout (+ or -)
6
Load
output voltage control
over current protection
standard voltage
generating part
5
2
Vout(com)
Voltage detection
+
Output voltage control
(Apply 0V to 4V)
Warning1: The ground line (2pin, 5pin) between the input/output, and the case
High voltage
rectification
Control IC
12V
2
DC-AC
switching
circuit
Vref
4
Vcont
External volt. (0∼4V)
or
VR (5KΩ)
Case
3
+
1
BHV20081113
UL Certified product(UL File No. E305960)
■ Model/Dimensions/Pin configuration (M-8 case)
(4.44)
2.54×3=7.62
pin-NO.
pin name
+Vin
-Vin
Vcont
Vref
Vout (com)
Vout (+ or -)
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
1
Vout (+ or -)
+Vin
6
installed, which is the over current protection. When the
product status is in over load or load short mode, the
+
C1
C2
MHV
2
-Vin
Vref
4
(OPEN)
Vout (Com)
Load
output voltage will decrease, and once the problem
has been removed, the voltage will increase again.
5
Vcont
3
C1=47μF
C2=4700pF
+
Output voltage control
(apply 0V to 4V)
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.
Output voltage set value
12V
100
80
100% output
60
40 50% output
20
(%) 0
0 Output current (lo)
100%
MHV series
Over current protection
characteristic
Place the capacitor as close as possible to the
converter pin side, to lower the lead inductance.
2
BHV20081113
■ 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.
1
2.54×3=7.62 27.94
15.24
17.78
+Vin
C1
2−
Hold
diameter
: φ2.5
2
C1=47μF
C2=4700pF
Output voltage
control
Apply 0v to 4V
or
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.
VR (5KΩ)
Also, this converter will generate high voltages so the
C2
MHV
79.6
Hold
6
+
12V
6− diameter : φ1.2
Vout (+ or -)
-Vin
Vref
4
Vout (Com)
Load
5
Vcont
3
+
R1
R2
creepage distance should also be taken into account
Output voltage−VR resistance value characteristic
when designing.
100%
②When mounting to a double-sided PCB, the high voltage
80%
Output 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.
60%
40%
20%
However, when using and making contact with the metallic
0%
case, the anti land impedance should be lowered.
R1 5KΩ
R2 0KΩ
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,
0KΩ
5KΩ
Output voltage−Output control voltage
characteristic
100%
Output voltage
■ Vref pin (standard voltage output)
VR resistance value
80%
60%
40%
20%
however one with a good temp coefficient is recommended.
0%
1V
2V
4V
3V
Output control voltage
● The above characteristics (Output voltage -VR resistance value
characteristic) graph is an indication of the resistance value R1
Standard voltage
generation circuit
0V
and R2.When setting the voltage to a set rate using a stable
MHV series
Vref
4
Vcont
3
External adjustable resistor (5.0KΩ)
resistor, first decide the adjustable resistor R1 and R2.
Vout (Com)
5
● 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
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.
1
12V
Output derating
MHV
C1
80
(%)
2
-Vin
Load
5
Vcont
3
4
(OPEN)
60
C2
Vout (Com)
Vref
C1=22∼47μF
C2=0.047∼0.1μF
+
Output voltage control
(Apply 0V to 4V)
When lowering the output noise, the wiring of the input
and output should be as short as possible. Place C2
40
closest to the load, paying attention to creepage and
20
0
-20
6
Vout (+ or -)
+
Though the system may start, reliability is not guranteed.
100
+Vin
clearance distances.
-10 0 +10 +20 +30 +40 +50 +60
Ambient temp (℃)
Point!
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.
Fuse
+
+Vin
■ Safety standards
MHV
12V
-Vin
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
1
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.
+Vin
Vout (+ or -)
6
+
12V
MHV
C1
2
-Vin
Vref
4
(OPEN)
C2
Vout (Com)
Vcont
3
Choose a fuse from below:
・UL Listed products
・DC250V、Rated current 2A type
Load
5
C1=47μF
C2=4700pF
+
Output voltage control
(Apply 0V~4V)
4
BHV20081113