Ultracompact, Adjustable Output High-Voltage Power Supply 1.5Watt Medium-High Voltage DC-DC Converter

Ultracompact, Adjustable Output High-Voltage Power Supply 1.5Watt Medium-High Voltage DC-DC Converter
Ultracompact, Adjustable Output High-Voltage Power Supply
1.5Watt Medium-High Voltage DC-DC Converter
1000V, 1500V, 2000V VHV Series
Volgen
The VHV series is our new line of medium-high voltage DC-DC converters featuring an ultracompact size with the footprint
reduced by about 60% as compared to conventional models.
With a pentahedron metal shield case, ripple noise has been reduced to as low as 10mVp-p. Output voltage can be adjusted by
external voltage or external variable resistor. The built-in short circuit and overcurrent protection provide high reliability and a long
life.
■ Features
・Ultralow ripple noise 10mVp-p
・World's smallest size (about a 60%
reduction from comparable
conventional models)
・Adjustable output voltage from 0 to
100%
・Control voltage 0 to +6V
・Built-in over current protection circuit
・Output capacity 1.5W
・ON/OFF Control
・Adjustable voltage by variable resistor or
external voltage
・Use of pentahedron metal shield case
・PCB mount type
・High reliability and long life
・Supports 24V input with an external DC-DC converter
■ Model/Standard
Input V
(Vdc)
Output V
(Vdc) *1
Output I
(mA)
Load Resistance
(KΩ) min
Input I
(A) typ
Ripple Noise
(mVp-p) typ
11.0-13.0
11.0-13.0
11.0-13.0
11.0-13.0
11.0-13.0
11.0-13.0
0 to +1000
0 to -1000
0 to +1500
0 to -1500
0 to +2000
0 to -2000
0-1.5
0-1.5
0-1.0
0-1.0
0-0.7
0-0.7
666.7
666.7
1500
1500
2857
2857
0.28
0.28
0.28
0.28
0.28
0.28
5
5
7
7
10
10
Models
OHV Series
VHV12-1.0K1500P
VHV12-1.0K1500N
VHV12-1.5K1000P
VHV12-1.5K1000N
VHV12-2.0K700P
VHV12-2.0K700N
Note 1: See P5 on how to use with a 24V input voltage.
■ Specifications
Line regulation
0.01% typ. (for a line regulation of 11.0 to 13.0V)
Load regulation
0.02% typ. (for a load current regulation of 0 to 100%)
Temperature regulation
70ppm/°C typ. (for temperature regulation of -10°C to +50°C)
Over current protection
Drooping characteristic, built-in automatic return circuit, activated at 105% or more
Output voltage setting accuracy
±2% or less (when controlling a 6.0V external voltage)
Output voltage control
Either with 0V to +6V external voltage or a 5KΩ external variable resistor
ON/OFF control
Between 2pin and 5pin, OFF when opened and ON when short-circuited
Operating temp range
-10°C to +50°C (no temperature derating needed
Storage temp range
-25°C to +85°C
Operating humidity range
20% to 95% RH (no condensation)
Isolation between input and
output
Non-isolated type (2pin through 6pin are connected inside)
MTBF expectation
Min. 390,000 to 400,000H (calculated from Bellnix MTBF calculation table)
Note 2 Output voltage is controlled by applying Vcont voltage. Apply voltage to the Vcont terminal by either variable resistor or external voltage to control output voltage.
Note 2 When Vcont voltage is zero, output voltage (output residual voltage) will be within 0.5% of maximum output voltage (input/output rating).
Note 3 Details are subject to change for improvement, etc., without prior notice.
■ Test circuit
■ Block diagram
VHV
1
+Vin
7
Vout (+ or -)
+Vin
12V
2
5
Output voltage control circuit
Over current protection circuit
Reference voltage generator
6
Vref
ON/OFF
SW1
Load
12V
Com (Vout)
-Vin
Short=ON
7
Control IC
+
CASE
Open=OFF
Vout (+ or -)
High-voltage
rectifier
Load
C1
SW1
High-voltage
oscillation
transformer
DC-AC
converter
1
+
Vcont
4
-Vin
C1=47μF
6
3
2
(OPEN)
+
case
Output voltage control
(0V to 6V applied)
(1) The input-output ground lines and the case are connected
(1) internally.
(2) Vref is 6V (when external VR is 5KΩ)
(3) ON/OFF can be controlled by a transistor.
SW1
Open=OFF
Short=ON
Com(Vout)
Voltage detection circuit
ON/OFF
Control
ON/OFF
5
Vref
4
Vcont
3
External voltage (0 to 6V)
or
VR (5kΩ)
+
Volgen
■ Shape, dimensions and terminal composition
16.0
Pin-NO.
1
2
3
4
5
6
7
0.5
30.0
44.0±0.5
6
1 23 4 5
7
Pin name
+Vin
-Vin
Vcont
Vref
ON/OFF
Com (Vout)
Vout (+ or -)
Weight: TBD
Unit: mm
4.0
2.0
Unspecified dimensional tolerance ±0.5
0.5
1) Terminal
Material: Phosphor bronze
7-0.64□L=4.2 min
Treatment: Ni base Au plating
35.5
2) Case
Material: Brass
7.0
Treatment: Nickel plating
5.08
±0.3
7.62
±0.3
7.62
±0.3
2×CASE PIN
2.54±0.1
2.54×4=10.16
■ Standard method of use
■ ON/OFF Control
Output voltage can be turned ON/OFF by closing/opening between the
ON/OFF terminal and -Vin terminal.
VHV
1
Vout (+ or -)
+Vin
7
Between ON/OFF terminal (5) and -Vin terminal (2)
(1) Output OFF when opened
+
12V
C1
Load
CASE
2
SW1
Open=OFF
Short=ON
Com (Vout)
-Vin
SW1
6
Vref
ON/OFF
5
4
(OPEN)
Vcont
3
C1=47μF
(2) Output ON when short-circuited (0 - 0.4V, 1mA max.)
As the ON/OFF terminal is pulled up to +Vin inside the power supply,
pay attention to the voltage of elements (photocoupler, transistor, etc.)
to switch the ON/OFF terminal.
Short-circuit when ON/OFF is not controlled.
+
Output voltage control
(0V to 6V applied)
The VHV series does not basically require
additional parts, but add capacitor C1 to the input
terminal if input impedance is high due to a long
distance between the power supply and
converter, the input line is thin, a filter is inserted
on the input side, etc. When fitting a capacitor, try
to add on the converter terminal side so as to
reduce lead inductance.
ON/OFF
(5)
ON/OFF
(5)
(2)
(2)
-Vin
-Vin
Non-isolated type
Isolated type
Ensure that there is no chattering to the ON/OFF terminal which affects
output voltage. Output residual voltage is 0.5% or less when output is
OFF under ON/OFF control (at the rated input-output).
Volgen
■ Overcurrent protection circuit
■ Setting and adjustment of output voltage
The output voltage of the VHV series can be set and adjusted by
external voltage and external variable resistor.
The VHV series has a built-in over current
protection circuit against overload and load
short- circuit. The circuit reduces output voltage
in case of overload or load short-circuit and
automatically returns the output to normal when
the cause is eliminated.
VHV
1
7
Vout (+ or -)
+Vin
+
Output voltage setting value (%)
12V
10
0
Load
C1
CASE
100% output
80
2
SW1
60
6
Vref
ON/OFF
Open=OFF
SW1
Short=ON
40
Com (Vout)
-Vin
4
(OPEN)
5
50% output
C1=47μF
+
Output voltage control
(0V to 6V applied)
20
0
Vcont
3
0
Output current (lo)
100%
Output voltage – VR resistance characteristic
Output voltage (%)
100%
The overcurrent protection circuit shows a
drooping characteristic. Ensure that the load to be
used is at least with the minimum resistance
specified for each series.
80%
60%
40%
20%
0%
R1 5kΩ
■ Recommended pattern
0kΩ
VR resistance
R2 0kΩ
5kΩ
[Top View]
17.75
17.75
Output voltage – output control voltage characteristic
80%
Output voltage (%)
8.75
6.75
100%
60%
40%
20%
0%
0V
2.54±0.1
2.54×4=10.16
5.08
±0.3
7- Hole dia. : φ1.2
7.62
±0.3
7.62
±0.3
1.5V
3V
4.5V
6V
Output control voltage
2- Hole dia. : φ2.5
[mm]
(i) The VHV series uses a metal case. When mounting
onto a double-sided board, wiring to this converter
should be on a soldered surface. When wiring, pay
enough attention to creepage distance because of
the high voltage of this converter.
(ii) When mounting onto a double-sided board, make
the land on the parts surface of the high voltage
output terminal as small as possible.
(iii) Connect the case of the VHV series to -Vin or Com.
Try to reduce impedance to the ground as much as
possible.
● In the above characteristic graph (output voltage - VR
resistance characteristic), the resistance R1 and R2
are a guideline. When setting output at a fixed voltage
with a fixed resistor, do so after determining R1 and
R2 using a variable resistor.
● Do not apply 6V+3% or more voltage to Vcont.
● Use a variable resistor with a good temperature coefficient.
● It is preset that when the resistance of the variable
resistor is 5.0KΩ, 6.0V is applied to the Vcont terminal
to obtain 100% output voltage. Since the tolerance of
the resistance value largely affects the maximum
output voltage, set the resistance value at 5.0KΩ±5%.
Volgen
■ Description of Vref terminal
(reference voltage output)
■ Recommended soldering conditions
This terminal is used for controlling output voltage
with a variable resistor. Vref outputs a reference
voltage of 6V. A 5KΩ external resistor is used in
this case.
Since resistance value (tolerance) of an external
resistor affects the Vref terminal voltage preset
value and determines output voltage, ensure that
the resistor has high accuracy of 5KΩ±5%. The
type of the variable resistor (5KΩ) does not matter,
but those of a good temperature coefficient are
recommended.
Observe the following conditions for soldering each part.
(i) Soldering iron
340 - 360°C
5 seconds
(ii) Dip solder bath
230 - 260°C
10 seconds
■ To reduce output noise further
The VHV series basically does not require any additional parts,
but to reduce output noise further, add Capacitor C2 as shown
below.
VHV
Vref voltage: 6±0.3V
1
Reference voltage
generating circuit
Vcont
4
7
+
VHV series
Vout (com)
6
Vref
Vout (+ or -)
+Vin
12V
C1
C2
CASE
2
3
Load
SW1
Open=OFF
Short=ON
Com (Vout)
-Vin
ON/OFF
SW1
6
Vref
5
4
(OPEN)
Vcont
3
C1=47μF
C2=0.047 to 0.1μF
+
Output voltage control
(0V to 6V applied)
External variable resistor (5.0KΩ)
■ Temperature derating
Can be activated in this area but without
performance warranty.
To reduce output noise even further, position C2 near the Load
with the shortest input-output wiring while paying attention to
creepage and spatial distances .
Output derating rate (%)
100
Point!
(i) Add a capacitor of a good high frequency
characteristic to the input side.
(ii) Design a pattern for the ground (common) line to be
thick and short so as to reduce common impedance.
80
60
(iii) Ensure that a capacitor to add to the output side shall
have a sufficient withstand voltage and shall be
attached to the terminal end. Try to make the lead
wires of the capacitor the shortest possible in this case
as well. In addition, with a load requiring a
certain response speed, pay attention to the time
40
20
0
-20
-10
0
+10 +20 +30 +40 +50
Ambient temperature (°C)
■ Protection against reverse connection
Reverse connection of input voltage may result in the breakage of a
converter. If there is any possibility for a reverse connection, add a
diode and a fuse to the input terminal as shown below.
Fuse
+
12V
+Vin
VHV
-Vin
Volgen
How to use for a 24V input voltage
By connecting a 24V-input 12V-output DC-DC converter to the
front of the VHV series, the VHV series can be used for a 24V
input voltage.
External DC-DC converter
24V
Vin
+
Vout
Circuit diagram of 12V input
12V
Vout (+ or -)
+Vin
DC/DC
C1
GND
C2
VHV
C3
CASE
Com (Vout)
-Vin
Vref
SW1
ON/OFF
Vcont
(OPEN)
+
Output voltage control
Warranty
The warranty term of the product is one year after
shipment. Should the product become defective
within the warranty period due to our design or
workmanship, the product will be repaired free of
charge or replaced. However, this warranty does not
cover products which have been subjected to
unauthorized inner modifications, etc.
The scope of our warranty is limited to that of the
said product.
Contact
If you have any further technical questions for this
product, please contact us.
E-mail: [email protected]
URL: www.volgen.com
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement