page

date

DESCRIPTION: chassis mount dc-dc converter

7 of 9

08/2009

20050

phone

phone 503.612.2300 fax

www.v-infinity.com

fax 503.612.2383

PART NUMBER: VHK75W

10. OUTPUT OCP AND SHORT-CIRCUIT PROTECTION

Output overload and short circuit conditional will cause the output voltage to decline or shutdown altogether.

If the case temperature

is not over 85°C, the output recovers automatically when the short or OCP conditions are removed. In the case of slight overloading,

the output voltage may not shut down, but the converter may build up heat over time, causing over-temperature shutdown.

11. OVER-TEMPERATURE PROTECTION

When the case temperature reaches about 85°C, the converter's built-in protection circuit will shut down the output. When the

temperature is reduced enough to a safe operating level, the converter will recover to normal operations automatically.

12. OUTPUT OVP

In case the output voltage exceeds the OVP threshold, the converter shuts down.

13. OUTPUT PARALLEL CONNECTIONS

The converter is not designed for load share on the output. One may be inclined to use this circuit to force current sharing by

trimming the output voltages for each converter. However, this circuit me not reliably or accurately divide the load current, as the

device characteristics of the converters or the diodes may not be balanced over a range of operating conditions. We generally do not

recommend this circuit to increase power output over a single converter. Instead, we recommend this setup for redundancy only,

having one converter as a backup in case of a failure. Make sure the OR-ing diodes can handle the voltage and full load current.

+Vin

-Vin

+Vo

-Vo

+Vin

-Vin

+Vo

-Vo

FIGURE 6. OUTPUT

PARALLEL CONNECTIONS