Difference between revisions of "MCE Power"
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<sup>1</sup>: +V<sub>ah</sub> or 10V supply only used when Readout Card Rev. B or Bias Card Rev. D is present in a subrack. | <sup>1</sup>: +V<sub>ah</sub> or 10V supply only used when Readout Card Rev. B or Bias Card Rev. D is present in a subrack. | ||
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* [http://www.phas.ubc.ca/~mce/mcedocs/hardware/schematics/PLA/ELE-C585-500_RevB_Linear_Open_Frame_PSU_Blk_Diagram.pdf Open Frame Linear Supplies Wiring Diagram] | * [http://www.phas.ubc.ca/~mce/mcedocs/hardware/schematics/PLA/ELE-C585-500_RevB_Linear_Open_Frame_PSU_Blk_Diagram.pdf Open Frame Linear Supplies Wiring Diagram] | ||
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| − | * Option 2 | + | * ''Option 2'' |
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Revision as of 12:34, 8 February 2012
Contents
Power Requirements
There are two types of MCE subracks:
- MCE72: contains up-to 10 cards, including a power supply module, and can read up to 32 columns.
- MCE48: contains up-to 7 cards and can read up to 16 columns.
The power requirements of a few typical subrack configurations are given below. To compute power and current requirements for a particular configuration, use: http://e-mode.phas.ubc.ca/mce/cgi-bin/power.cgi .
| Configuration | MCE48 RC_RevE BC_RevF1 |
MCE48 RC_RevB BC_RevF0 |
MCE72 RC_RevE BC_RevD |
MCE72 RC_RevB BC_RevD | |
|---|---|---|---|---|---|
| Voltage | |||||
| Vcore1 | 3.0V | 3.2A | 2.7A | 5.3A | 4.3A |
| Vlvd | 4.5V | 2.9A | 2.9A | 3.1A | 3.1A |
| Va+ | 6.2V | 3.5A | 8.6A | 5.7A | 14.5A |
| Va− | −6.2V | 1.0A | 1.3A | 1.8A | 1.4A |
| Vah2 | 10.0V | — | 0.01A | 0.06A | 0.09A |
| Total Power | 50.1W | 82.5W | 77.2W | 125.7W | |
1: Minimum Vcore supply for older version of cards can be as low as 2.5V, but newer RC and BC require minimum 3V see note. The numbers in this table assume a Vcore of 3V.
2: The 10V Vah supply only used when Readout Card Rev. B (or older) or Bias Card Rev. D (or older) are present in the subrack. Vah was used to generate reference voltages for DACs.
For card specific power requirements, see MCE Card Specific Power Requirements
Powering up an MCE
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 in the front.
- The 5-MDM MCE, SCUBA2 style (72HP) has 2 Circular Amphenol connectors in the front panel. Pinout is here:Amphenol pinout]
- The 3-MDM MCE (48HP, Spider Style) and newer 5-MDM MCE have a Winchester MRA-34P-G connector in the front panel. Pinout can be found under Winchester connector, here :
48HP Front-Panel Power Connection
The Winchester connector is to be used with either linear supplies or switching supply (PSA). When using linear supplies, you can ignore connections that are "white" on that pinout. Those lines are few digital lines to monitor voltages of the switching supply and unused when used with Linear supplies.
The set of linear supplies listed below (or similar supplies) are suitable. 1: +Vah or 10V supply only used when Readout Card Rev. B or Bias Card Rev. D is present in a subrack.
- Option 1
| +Vcore | IHC5-6/OVP (adjustable) | 3V | 5A |
| +Vlvd | IHB5-3/OVP | 4.5V | 3A |
| +Va | IHE5-18/OVP | 6.2V | 15A |
| -Va | IHB5-3/OVP | -6.2V | 2A |
| +Vah 1 | IHA15-0.5 | 10V | 0.1A |
- Option 2
| +Vcore | Kepco JQE 6-22M (adjustable) |
| +Vlvd | Power One HC5-6/OVP |
| +Va | Kepco JQE 15-25M (adjustable) |
| -Va | Kepco JQE 15-25M (adjustable) |
| +Vah 1 | Power One HAD15-0.4-A |
1: +Vah or 10V supply only used when Readout Card Rev. B or Bias Card Rev. D is present in a subrack.
As a slightly out-of-date example, here is how we setup our linear supplies in the lab (for 1 MCE).
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 (ACDCU) that can reside far from the MCE. The ACDCU is designed and supplied by UBC.
The PSA is equipped with a controller card that allows monitoring voltage/current levels of the MCE by issuing a command from the MCE control PC. See psc_status.
Vicor Switching Supplies (24V-in)
The MCE can alternatively be equipped with a 18–36Vin (24Vin nominal) switching supply designed for use in balloon-based experiments. We are currently debugging a prototype design based on Vicor supplies. A preliminary schematics can be found here
