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# Current consumption:
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The CONV-TTL-BLO board generates the +27V required for the blocking
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output stage, from the +12V provided on the ELMA crate. To do so, it
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uses the TI TSP 40210 boost controller.
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In terms of power ELMA specifies 66W available on the +12V power supply
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(corresponding to 5.5A maximum current) compared with the 200W on the
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+5V power supply.
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As the board can potentially operate six blocking channels, each with 3
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outputs, the +27V supply may not be able to cope with current demand.
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Therefore it is necessary to define a limiting value in terms of
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blocking outputs/crate, that can be supported by the design.
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## Measurement procedure:
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A conv-ttl-board is plugged on an ELMA crate with an RTM board.
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A worst case 2MHZ pulse is fed to the board (Board running with gateware
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v4 release)
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