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Altera_Forum's avatar
Altera_Forum
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15 years ago

power supply requirement

Hi, we are going to use FPGA EP4CGX50. In your AN 592: Cyclone IV Design Guidelines Device Power-Up topic (page 15) says '' Cyclone IV devices support power up or power down of the VCCINT, VC...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

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Will this phase affect the FPGA powering up ?

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No.

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Can you specify the importance of the phase shift ?

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It will signifcantly reduce the input current ripple of the converter.

Sufficient bypassing at the input of the switch mode converter and filtering of the output voltages should be provided anyway.