Datasheet

UCQ-1.2/30-D48 UCQ-1.5/25-D48 UCQ-1.5/40-D48 UCQ-1.8/30-D48 UCQ-1.8/40-D48
Isolation Voltage
Input to Output,
Volts min.
2250
Input to baseplate,
Volts min.
1500
Baseplate to output,
Volts min.
1500
Isolation resistance, MΩ 10-100, model dependent
Isolation capacitance, pF 1000
Isolation safety rating Basic insulation
Miscellaneous
Current limit inception
(98% of Vout, after
warmup), Amps
35 35 49 35 49
Short circuit protection
method
Current limiting, hiccup autorestart. Remove overload for recovery.
Short circuit current,
Amps
5
Short circuit duration Continuous, output shorted to ground. No damage.
Overvoltage protection,
Volts (via magnetic
feedback)
1.8 1.8 1.95 2.7 V max 2.2
Dynamic characteristics
Dynamic load response
(50-75-50% load step)
200 µSec to ±1%
of final value
200 µSec to ±1%
of final value
50 µSec to ±1% of
final value
100 µSec to ±1%
of final value
50 µSec to ±1% of
final value
Start-up time
Vin to Vout regulated,
mSec
10 max.
Remote On/Off to Vout
regulated, mSec
10 max.
Switching frequency, KHz 350 ± 20 440 ± 40 400 ± 40 400 380 ±40
Environmental
Calculated MTBF 2M hours 2.1M hours 2.2M hours 2M hours 2.1M hours
Operating temperature
range, °C
See Derating curves.
−40 to +85, with derating
Operating case
temperature, °C
(no derating)
−40 to +120, model dependent
Storage temperature
range, °C
−55 to +125
Thermal protection/
shutdown, °C
110-125, model dependent
Relative humidity To +85°C/85%, non-condensing
FUNCTIONAL SPECIFICATIONS
➀ Specs are typical unless noted.
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Single Output UCQ Models
Low-Profile, Quarter Brick, 8.3-40 Amp
Isolated DC-DC Converters
MDC_UCQ Models.E02 Page 6 of 24