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500 Watt Military DC/DC Power Supply, Cooled Base Plate   600 Watts Military Grade 5 Output VME Power Supply   
440 Watts Radar Power Supply System

500 Watt Military DC/DC Power Supply, Cooled Base Plate

1 • Scope
This preliminary specification outlines the electrical and mechanical characteristics for a 500 watt, single output, military grade, dc to dc converter designed to operate under harsh environmental conditions for airborne applications.

2 • DC Input
2.1 Voltage Input Range: 18-36Vdc (24Vdc nominal)
2.2 Power ON Voltage Range: 16.5 - 17.9Vdc (Typical)
2.3 OFF State Input Current: 6mA (Typical)
2.4 Input Transient Protection: MIL-STD 704A/D (80Vdc for 100mSec)
2.5 Voltage Surge Protection: MIL-STD 1275A/D (100Vdc for 50mSec)

3 • DC Output
3.1 Output Power: 500W
3.2 Output Voltage: 7.0Vdc
3.3 Output Current: 71A Continuous (No minimum loading required)
3.4 Line Regulation: ±0.2% Typical
3.5 Load Regulation: ±0.2% Typical (No load to full load; nominal input)
3.6 Output Ripple/Noise: 70mV Typical (P-P; nominal input; full load; 20MHz bandwidth)
3.7 Set Point Accuracy: ± 1.0% of Output Voltage (Nominal input; full load; 25°C)
3.8 Transient Response: Output voltage returns to within nominal output voltage with in 1500uSecs for a 50 to 75% load change.
3.9 Overshoot: Turn-on and turn-off overshoot should not exceed 5% over nominal voltage.
3.10 Output Voltage Adjustment Range: ±10%

4 • Electrical Characteristics
4.1 Efficiency: 89% Minimum (Measuring at 7Vdc and full load, nominal voltage input)
4.2 Turn On Delay: 50 to 250mS (To nominal output voltage)
4.3 Isolation Voltage:
Input to Output: 2000Vrms
Input to Chassis: 1000Vrms
Output to Chassis: 1000Vrms

5 • Protection
5.1 Over Current Limit: 115 to 130% Auto-Recovery after removal of overload condition.
5.2 Over-Voltage Protection: 108 to 125% of nominal output voltage. Unit latched, recycle DC input to reset.
5.3 Short Circuit: Auto-Recovery after short circuit condition is removed.
5.4 Over temperature Protection: The power supply is protected for over temperature conditions with thermal shutdown. Auto-Recovery when temperature returns to normal.

6 • Environmental
6.1 Operating Temperature: -55º to 85º C (Baseplate temperature)
6.2 Storage Temperature: -55º to 100º C
6.3 Operating Humidity: 5% to 90% RH, Non-condensing
6.4 Storage Humidity: 5% to 95% RH, Non-condensing
6.5 Operating Altitude: Sea-level to 40,000 ft. in pressurized environment
6.6 Shock & Vibration: Per MIL-STD-810D/E
6.7 Conducted EMI: MI-STD-461C/D/E/F
 
7 •  Cooling
7.1 Cooling: Conduction. Baseplate must not exceed 85°C to maintain full rated output.

8 •  Mechanical
8.1 Outline Dimensions: ~3.5" x 5.5" x 2.25"
8.2 Enclosure:  Metal Chassis, Aluminum
8.3 Weight:  300 grams (Estimate)
8.4 DC Input Connector:  
8.5 DC Output Connector:

9 • Controls/Signals/Alarms
9.1 Sync Frequency: N/A
9.2 Output Voltage Adjust Control: TBD
9.3 Remote On/Off: N/A

500 Watt Military DC/DC Power Supply, Cooled Base Plate

10 • Notes
10.1 Product specifications subject to change without notice. All rights reserved
10.2 The information and specifications contained in this document

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16075 Vineyard Blvd. Suite B Morgan Hill, CA 95037
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