Ultracompact, Adjustable Output High-Voltage Power Supply
1.5Watt Medium-High Voltage DC-DC Converter
1000V, 1500V, 2000V OHV Series
The OHV 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)
･ON/OFF Control
･Adjustable voltage by variable resistor or
external voltage
･Adjustable output voltage from 0 to
100%
･Use of pentahedron metal shield case
･PCB mount type
･Control voltage 0 to +6V
･Built-in over current protection circuit ･High reliability and long life
･Output capacity 1.5W
･Supports 24V input with an external DC-DC converter
■ Model/Standard
Models
OHV Series
Load Resistance
(KΩ) min
Input I
(A) typ
Input V
(Vdc)
Output V
(Vdc) *1
Output I
(mA)
Ripple Noise
(mVp-p) typ
OHV12-1.0K1500P
OHV12-1.0K1500N
OHV12-1.5K1000P
OHV12-1.5K1000N
OHV12-2.0K700P
OHV12-2.0K700N
0.28
0.28
0.28
0.28
0.28
0.28
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
666.7
666.7
1500
1500
2857
2857
5
5
7
7
10
10
0-1.0
0-0.7
0-0.7
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
Over current protection
Output voltage setting accuracy
70ppm/°C typ. (for temperature regulation of -10°C to +50°C)
Drooping characteristic, built-in automatic return circuit, activated at 105% or more
±2% or less (when controlling a 6.0V external voltage)
Output voltage control
ON/OFF control
Either with 0V to +6V external voltage or a 5KΩ external variable resistor
Between 2pin and 5pin, OFF when opened and ON when short-circuited
-10°C to +50°C (no temperature derating needed
-25°C to +85°C
Operating temp range
Storage temp range
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
OHV
1
7
+Vin
Vout (+ or -）
+Vin
Vout (+ or -）
High-voltage
oscillation
transformer
DC-AC
converter
High-voltage
rectifier
1
+
7
12V
C1
Load
+
Control IC
CASE
-Vin
Load
12V
Output voltage control circuit
Over current protection circuit
Reference voltage generator
Com (Vout)
6
2
Vref
4
SW1
ON/OFF
5
Vcont
3
-Vin
2
C1=47μF
6
Open=OFF
Short=ON
SW1
Com(Vout)
(OPEN)
Voltage detection circuit
+
case
ON/OFF
Output voltage control
(0V to 6V applied)
Control
SW1
Open=OFF
Short=ON
(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.
Vcont
External voltage (0 to 6V)
ON/OFF
5
Vref
4
3
+
or
VR （5kΩ）
1
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