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UF224 Converter Kit

5. Input OVP

To suppress voltage transients of short durations, the kit includes a Zener diode. For converter inputs

of up to 18V, the Zener diode used has a rated breakdown voltage of 20V. For converter inputs of

up to 36V, the Zener diode has a rated voltage of 39V. For inputs up to 72V, the Zener voltage rated

is 82V. Notice, however, that these Zener diodes can only dissipate a small amount of power. It is

necessary to ensure the input voltage does not exceed the maximum rated converter input. Otherwise

the converter and the Zener diode may suffer permanent damage.

6. Input reversal

If the input voltage is reversed for any reason, the built-in protection circuits in the UF224 kit will limit

the reverse voltage to one diode drop or no more than 1V. The input fuse will open and thus remove

power from the converter. Check the wiring and make corrections as needed. The input fuse will need

to be replaced. Make sure the new fuse is of the same type and rating.

7. Output trimming (optional)

The UF224 Kit provides the space and pads for a trimming potentiometer. To adjust the output volt-

age, install a 5KΩ potentiometer, (Digikey part # 3306F-502-ND or 307UC502E-ND or equivalent).

The potentiometer is not needed if no trimming function is desired. Please note that only converters

listed in the Model Configurations table can achieve output trimming.

8. Output OCP and short-circuit

Output overload and short circuit protections are provided by the converter itself only. Please see the

converter datasheet for reference.

9. Output OVP

Output over-voltage protection is provided by the converter itself only. Refer to converter datasheet.

10. Output On/Off control

The converter output can be enabled or disabled through the On/Off pin. Refer to converter data

sheet.

11. Isolation

The input and output of the converter are electrically isolated. The isolation voltage rating is the same

as that of the converter. Refer to converter data sheet.

12. Input filtering and EMI interference

The UF224 kit has built-in components for input filtering, leading to reduced current ripple and the

associated EMI interference. The kits are designed to meet EN55022 class B conducted standards. If

the entire system powered by this converter kit needs to pass an EMI standard, it is recommended to

have entire system tested against that standard.

13. Output filtering

The UF224 kit has a small output capacitor to help reduce ripple and noise.

V-Infinity reserves the right to make changes to its products or to discontinue any product or service

without notice, and to advise customers to verify the most up-to-date product information before plac-

ing orders. V-Infinity assumes no liability or responsibility for customer's applications using V-Infinity

products other than repair or replacing (at V-I's option) V-Infinity products not meeting V-I's published

specifications. Nothing will be covered outside of standard product warranty.

All specifications typical at nominal line, full load and 25°C unless otherwise noted.