5W-20W
MODULAR DC-DC CONVERTERS WITH NON-ISOLATED I/O
✔ Wide Input Voltage Ranges
✔ Pi Input Filters—Built-in EMI Suppression
✔ 20W Model Includes
Remote Shutdown
Remote Load Sensing
Remote Output Voltage Adjustment
✔ Short-Circuit/Over-Voltage Protection
✔ Compact Packages
✔ Six-Sided Shielding
✔ High Efficiency Ratings
✔ 2-Year Warranty
✔ 200,000-Hour Minimum MTBF
CHARACTERISTICS
EMI Suppression.......................Pi input filter, standard.
Input Current
No Full Output Output
Min. Nom.Max. Load LoadVoltageCurrent Line Load Effi-
Max.
Input Voltage
Reflected Ripple Current...........DCU1-5, 50 mA , max.
pp
DCU1-20, 75 mA , max.
pp
Model
(V) (V) (V) (A)
(A)
(V)
(A) Reg. Reg. ciency
Continuous Output Power.........See output voltage/current ratings.
Output Voltage Tolerance..........DCU1-5, 2%.
DCU1-20WR/5, 2%.
All other DCU1-20 models, 1%.
External Output Trim.................DCU1-20-WR/5, +5%; other DCU1-
20 models, 5%.
DC-DC 5W Single Output
DCU1-5-WR/5 7.0 12 32 0.025 0.600 5.10
1.0 0.5% 0.5% 74%
4.0 0.5% 1.0% 82%
DC-DC 20W Single Output
DCU1-20-WR/5 8.0 24 36 0.015 1.020 5.05
Output Noise and Ripple...........DCU1-5, 75 mV , max.
pp
Notes
DCU1-20, 50 mV , max. (Note 2).
pp
1. Use of an external input line fuse is recommended:
DCU1-5, use a 1.0A/125V slow-blow fuse.
DCU1-20, use a 5A/125V slow-blow fuse.
Short-Circuit Protection.............DCU1-5, pulsed overload type.
DCU1-20, cycle-by-cycle current
limiting; internal thermal shutdown.
2. Peak-to-peak and RMS metering equipment must have a 20 MHz frequency
response with probes and cables that maintain a frequency response of 20
Hz to 20 MHz. Output ripple and spikes are measured directly at the output
terminals of the converter with a 0.1 µF ceramic capacitor. The probe
ground band must make direct contact with the output return or the common
terminal of the converter to prevent erroneous noise measurements.
3. All measurements are at nominal input, full load, and +25°C unless other-
wise specified.
Over-Voltage Protection............130% of rated output voltage, typ.
Reverse Voltage Protection ......Internal shunt diode.
Transient Response..................DCU1-5, 500 µs recovery to within
1% of the regulation band after
25% step load change with no more
than 200 mV deviation.
DCU1-20, 200 µs recovery to within
1% of the regulation band after
50% step load change with no more
than 5% deviation.
4. MTBF is calculated using the parts stress method in MIL-HDBK 217F
(ground benign, T = +25°C).
A
Frequency of Operation............DCU1-5, 125 kHz.
DCU1-20, 72 kHz.
Remote Shutdown ....................DCU1-20, ON = 0.5V to VIN(MAX) or
open circuit; OFF = 0.25V or less.
Standby Mode Current Drain....DCU1-20 series, less than 1.0 mA
at VIN = 24V.
Temperature Range ..................-25°C to +70°C, no de-rating.
Temperature Coefficient............ 0.02%/°C over the entire operating
temperature range.
Relative Humidity......................0 to 95%, non-condensing.
Altitude......................................0 to 10,000 feet.
Cooling......................................Convection cooling is adequate.
Moving air is recommended for
operation in a confined area.
Storage Temperature ................-40°C to +100°C.
Storage Humidity ......................0 to 95%, non-condensing.
Mean Time Between Failures ...DCU1-5, >250,000 hours.
DCU1-20, >200,000 hours. (Note 4.)
POWER
152 Will Drive · Canton, MA 02021 USA · Phone 781-828-6216 · Fax 781-830-1155 · Email power@nidecpg.com · http://www.nidec.com
GENERAL
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