Hi,
On 2021-09-27 16:28, Lux, Jim wrote:
On 9/27/21 7:22 AM, John Ackermann N8UR wrote:
Indeed, Dana. Texas Instruments has a nice "designer workbench" for
their switching regulators like the TPS53400 to help select the
components. Using that worked much better than trying to follow the
data sheet circuits.
I also found that high ESR caps, particularly on the output, are
important. And also that you don't want to slowly ramp up the input
voltage for testing, as the thing will start sqealing if fed with
voltage way below the output. You want a quick start at the working
input voltage.
yes, you don't want to be too "soft start" on the upstream converter.
Indeed. It may result in brown-out like conditions and creat wonderful
magic states in equipment. Another similar enough thing is
power-sequence, enabling power up in the right sequence.
It's not the old "predictable" TTL designs anymore.
Cheers,
Magnus
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