Datasheet

QTD20.241
Q-Series
24V, 20A, DC INPUT
Mar 2012 / Rev. 1.2 DS-QTD20.241-EN
All parameters are specified at 24V, 20A, 600Vdc input, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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7. OUTPUT
Output voltage
nom. 24V
Adjustment range
min. 24-28V guaranteed, multi turn potentiometer
max. 30V at clockwise end position of potentiometer
Factory setting
24.1V
±0.2%, at full load, cold unit
Line regulation
max. 10mV 480Vdc Æ 840Vdc Æ 480Vdc, 24V, 20A
Load regulation max. 100mV static value, 0A Æ 20A Æ 0A
Ripple and noise voltage
max. 100mVpp 20Hz to 20MHz, 50Ohm
Output capacitance
typ. 1 000μF The energy of the bulk capacitor on the input side will be
transferred to the output to supply short load peaks.
Continuous output power capability
Output current
nom. 20A at 24V see Fig. 7-1,
Note: derating below 480Vdc and above 840Vdc, see
Fig. 7-2
nom. 17.5A
at 28V see
Fig. 7-1,
a derating is required below 480Vdc and above 840Vdc
Output power
nom. 480W at 24-28V, between 480Vdc and 840Vdc
Note: derating below 480Vdc and above 840Vdc, see Fig. 7-2
Short-circuit current min. 20A load impedance 50mOhm, see Fig. 7-1
max. 23A load impedance 50mOhm, see Fig. 7-1
BonusPower
®
, short term output power capability (up to typ. 4s)
The power supply is designed to support loads with a higher short-term power requirement without damage or
shutdown. The short-term duration is hardware controlled by an output power manager. The BonusPower
®
is
repeatedly available. Detailed information can be found in chapter 26.1 .
Once BonusPower
®
has been stopped by the output power limiter, a timer disables the next BonusPower
®
capability.
This timer (recovery time) will start as soon as the output voltage reaches the adjusted value again, which usually
happens after the load has been reduced.
Output current
nom. 25A at 24V, between 480Vdc and 840Vdc, see Fig. 7-1
Note: derating below 480Vdc and above 840Vdc, see
Fig. 7-2
nom. 21.4A
at 28V, between 480Vdc and 840Vdc, see
Fig. 7-1
a derating is required below 480Vdc and above 840Vdc
Output power
nom. 600W 24-28V, short term
Short-circuit current min. 25A load impedance 50mOhm, see Fig. 7-1
max. 28A load impedance 50mOhm, see Fig. 7-1
Bonus time typ. 4s at 24V, > 25A, duration until the output voltage dips,
min 3.5s see Fig. 7-3
max. 4.5s
BonusPower
®
recovery time
typ. 7s Overload free time to reset power manager, see Fig. 7-4