Page 2 - MPD MD900RU Datasheet
P. 2



Model Selection Guide www.micropowerdirect.com
Input Output Fuse
Capacitive
Model Effi ciency Rating
Load
Number Voltage (VDC) Current (mA) Voltage Current Current (%, Typ) (µF, Max) Slow-Blow
(VDC) (mA, Max) (mA, Min) (mA)
Nominal Range Full-Load No-Load
MD924S-03RU 24 9.0 - 36.0 335 9 3.3 2,000 0.0 82 2,600 2,000
MD924S-05RU 24 9.0 - 36.0 392 9 5.0 1,600 0.0 85 1,300 2,000
MD924S-09RU 24 9.0 - 36.0 426 9 9.0 1,000 0.0 88 800 2,500
MD924S-12RU 24 9.0 - 36.0 426 9 12.0 750 0.0 88 560 2,500
MD924S-15RU 24 9.0 - 36.0 421 9 15.0 600 0.0 89 560 2,500
MD924S-24RU 24 9.0 - 36.0 421 9 24.0 375 0.0 89 200 2,500
MD924D-05RU 24 9.0 - 36.0 392 9 ±5.0 ±800 ±0.0 85 800 2,000
MD924D-12RU 24 9.0 - 36.0 426 9 ±12.0 ±375 ±0.0 88 390 2,500
MD924D-15RU 24 9.0 - 36.0 431 9 ±15.0 ±300 ±0.0 87 200 2,500
MD948S-03RU 48 18.0 - 75.0 168 5 3.3 2,000 0.0 82 2,600 1,000
MD948S-05RU 48 18.0 - 75.0 196 5 5.0 1,600 0.0 85 1,300 1,000
MD948S-09RU 48 18.0 - 75.0 216 5 9.0 1,000 0.0 87 800 1,500
MD948S-12RU 48 18.0 - 75.0 213 5 12.0 750 0.0 88 560 1,500
MD948S-15RU 48 18.0 - 75.0 211 5 15.0 600 0.0 89 560 1,500
MD948S-24RU 48 18.0 - 75.0 211 5 24.0 375 0.0 89 200 1,500
MD948D-05RU 48 18.0 - 75.0 196 5 ±5.0 ±800 ±0.0 85 800 1,000
MD948D-12RU 48 18.0 - 75.0 216 5 ±12.0 ±375 ±0.0 87 390 1,500
MD948D-15RU 48 18.0 - 75.0 216 5 ±15.0 ±300 ±0.0 87 200 1,500
2:1 Input Models Are Also Available
See The MD900xRW Derating Curve
Notes:
1. The specifi ed maximum capacitive load is for each output.
2. Start up time is specifi ed at the nominal Voltage input and with a constant
resistive load.
3. Load regulation is specifi ed for a load change of 0% to 100%.
4. Cross regulation is specifi ed with one output at full load while the other
output is varied from 25% to 100% load.
5. Output ripple is measured with a 1 μF ceramic capacitor and a 10 μF
electrolytic capacitor connected in parallel.
6. Transient recovery is measured to within a 1% error band for a load
step change of 25%. Single 3.3 & 5 VDC output models have a response
deviation of ±5.0% Max.
7. Isolation voltage ratings are for 60 seconds.
8. With the addition of external fi lter and protection components, all models will
meet the requirements of EN 55032 class A. Suggested input circuits are shown
in the connection diagrams on page 3. Contact the factory for more information.
9. To meet the requirements of EN 61000-4-4 (±2 kV), external components
are needed. The connection diagrams on page 3 shows external components
that would typically achieve this. Contact the factory for more information.
10. To meet the requirements of EN 61000-4-5 (±2 kV), external components are
needed. This can be done as shown in the connection diagrams on page 3.
Contact the factory for more information.
11. Operation at no-load will not damage the unit, but they may not meet all
specifi cations.
12. It is recommended that a fuse be used on the input of a power supply for
protection. See the Model Selection table above for the correct rating.
Remote ON/OFF Control


The MD900x-RU may be started or shutdown by the control pin
input (pin 3). This input is current controlled. The unit operates
when this input is left open. When the input is “high” (current is
fl owing into the pin), the converter shuts down. The input current
to this pin must be kept between 2 mA to 4 mA.

The diagram at right shows a simple input circuit for the control
pin. Closing the switch causes 2 - 4 mA to fl ow through the 1 k
resister, shutting the unit off.





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