Vicor Power Assembly

Template:Hierarchy header The MCE can alternatively be equipped with a 18–36Vin (24Vin nominal) switching supply designed for use in balloon-based experiments. The Vicor supplies are trimmed to accomodate losses of up to 2m cable, so they can be located up to 2m away from the actual MCE crate.

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Schematics

• Schematics for the Vicor Supplies can be found here
• The schematics for the Wiring harness in the box and the pinout for the Winchester connector: pdf

Check the schematics for Input/Output connector pinout.

Output Connector

Winchester MRA34SG

Input Connector

Amphenol PTC-2A-14-5P

Specification

DC Input Type

18-36V

3A from 24V to power one 3-MDM MCE48 crate (6A for two)

DC output

pVa: 6.1 to 6.3 V

nVa: -6.1 to -6.3 V

Vlvd: 4.4 to 4.7 V

Vcore: 2.9 to 3.2 V

Watts

100W

Regulated

Yes

Efficiency

75%

Dimensions (L x W x H)

24cm x 20cm x 5cm

Weight

< 2kg and a 1m power cable is ~1kg

Notes

1. The Vicor supply is equipped with two Winchester connectors to power two MCE48 crates. So far, we are able to use a Y cable and power two MCE48 from one connector. When we tried to use each connector separately, with separate cables, oddly enough, the noise performance was degraded.
2. We have not used the Vicor supply to power a 5-MDM MCE72 yet. The power requirements for a 5-MDM MCE are disctributed slightly differently than twice an MCE48 mainly due to LN_BIAS circutries.

Testing

• Testing VPA