Hold-up time

The input side of the DC/DC converter is equipped with a bulk capacitor which keeps the output voltage alive for a certain period of time when the input voltage dips or is removed. The bulk capacitor can be discharged by loading the DC/DC converter on the output side or through a load which is parallel to the input. There is no protection in the DC/DC converter which prevents current from flowing back to the input terminals. If prevention is needed, an external diode should be used.

At no load, the hold-up time can be up to several seconds. The green DC-OK LED is also on during this time.

Hold-up time

Typ.

8ms

At 24Vdc input voltage, 24V, 5A output, see Fig. Hold-up time vs. input voltage

Min.

6.5ms

At 24Vdc input voltage, 24V, 5A output, see Fig. Hold-up time vs. input voltage

Typ.

4ms

At 24Vdc input voltage, 24V, 10A output, see Fig. Hold-up time vs. input voltage

Min.

3.2ms

At 24Vdc input voltage, 24V, 10A output, see Fig. Hold-up time vs. input voltage

Hold-up time 1:
Hold-up time vs. input voltage
Hold-up time 2:
Shut-down test setup; Shut-down behavior, definitions