Difference between revisions of "MCE Power"
| Line 38: | Line 38: | ||
;Switching Supplies (AC-powered) | ;Switching Supplies (AC-powered) | ||
| − | The MCE can be equipped with a switching supply (PSA) that is powered through a front-panel Amphenol connector that takes +-150V DC. The +-150V is generated by an external AC-DC unit that can reside far from the MCE. The ACDC unit | + | The MCE can be equipped with a switching supply (PSA) that is powered through a front-panel Amphenol connector that takes +-150V DC. The +-150V is generated by an external AC-DC unit that can reside far from the MCE. The ACDC unit is designed and supplied by UBC. |
So far, there has only been one incident that the switching noise was reported to be unacceptable. | So far, there has only been one incident that the switching noise was reported to be unacceptable. | ||
| − | See picture of 5-MDM MCE (72HP) | + | See picture of 5-MDM MCE (72HP) powered by PSA+ACDCU[] |
| + | See picture of 3-MDM MCE (48HP) powered by PSA+ACDCU[] | ||
;Switching Supplies (24V-in) | ;Switching Supplies (24V-in) | ||
The MCE can alternatively be equipped with a 24V-in Switching supply to be used in balloon-based experiments. We are currently debugging the prototype design. | The MCE can alternatively be equipped with a 24V-in Switching supply to be used in balloon-based experiments. We are currently debugging the prototype design. | ||
Revision as of 17:39, 26 March 2010
The MCE power requirements are:
| +Vcore | 3V | 5A |
| +Vlvd | 4.5V | 3A |
| +Va | 6.2V | 15A |
| -Va | -6.2V | 2A |
| +Vah 1 | 10V | 0.1A |
1: 10V supply only used when Readout Card Rev. B or Bias Card Rev. D is present in a subrack. 10V was used to generate reference voltages for DACs.
There are different solutions for powering up an MCE.
- Linear Supplies
A straight-forward method is to use linear supplies configured to satisfy the above requirements. In that case the MCE has to be equipped with the right Linear-Feed connector.
The 5-MDM MCE (72HP, SCUBA2 style) has 2 Circular Amphenol connectors in the front panel. Pinout is here:Amphenol pinout]
The 3-MDM MCE (48HP, Spider Style) has a Winchester MRA-34P-G connector in the front panel. Pinout can be found under Winchester connector, here : 48HP PSU Connector
As an example, here is how we setup our linear supplies in the lab.
- Switching Supplies (AC-powered)
The MCE can be equipped with a switching supply (PSA) that is powered through a front-panel Amphenol connector that takes +-150V DC. The +-150V is generated by an external AC-DC unit that can reside far from the MCE. The ACDC unit is designed and supplied by UBC.
So far, there has only been one incident that the switching noise was reported to be unacceptable.
See picture of 5-MDM MCE (72HP) powered by PSA+ACDCU[] See picture of 3-MDM MCE (48HP) powered by PSA+ACDCU[]
- Switching Supplies (24V-in)
The MCE can alternatively be equipped with a 24V-in Switching supply to be used in balloon-based experiments. We are currently debugging the prototype design.
