High Accuracy, Low Noise Mid-to-High Voltage DC-DC Converter

10,000V, 15,000V NHV Series

5

DC-DC Converter

BHV20170526_B01

8-3 Reference voltage

Reference voltage output terminal, the Vref (5pin) generates reference voltage of 10V. This terminal is used

when controlling output voltage by a variable resistor (5k

Ω min.). Leave this terminal open when output

voltage is adjusted by external voltage. Do not allow reference current to exceed 2mA.

8-4 Overcurrent protection

If output current becomes 105% or more of the rated current value, over current protection (OCP) functions to

lower the output voltage. Since this overcurrent protection is an auto restart type, output will resume upon

release of the overcurrent state.

8-5 ON/OFF control

Output voltage can be turned ON/OFF by opening or short-circuiting between the ON/OFF (6Pin) and the

SGND (3Pin) without turning on/off the input voltage. In the case of not using the ON/OFF control, short-circuit

these two terminals. Use an open collector type.

・Open between 6 and 3 (6V max.):

Output Off

・Short between 6 and 3 (0

– 0.3V, 2mA max.): Output On

8-6 Thermal shutdown

This function works upon the abnormal rise of the ambient temperature or the temperature inside this power

supply to stop the oscillation of the converter and the supply of output power. If the thermal shutdown

functioned, shut down the input and wait some time for the temperature to come down sufficiently (after

eliminating the cause) before reclosing.

10

3

NHV

SGND

4

Vcont

Vref

(10V)

R1

R2

VR

100％

80％

60％

40％

20％

0％

Output voltage – VR resistance characteristic

VR resistance

R1　max.Ω

R2　 0kΩ

0kΩ

max.Ω