balamanikandan
Member level 1
hi,
"....To reduce the rms current in the bulk capacitors the ripple voltage amplitude must be reduced using
ceramic capacitors....."
I can understand the purpose of ceramic capacitors and Bulk capacitors.
But I could not understand How Ceramic reduces the input ripple voltage when bulk does not?
it looks like....ceramic acts as a safeguard for bulk. Since ceramic limits input ripple voltage , Bulk handles less ripple current. But both are in parallel.
Please explain the physics behind this.
I referred the application note at https://www.ti.com/lit/an/slta055/slta055.pdf
"....To reduce the rms current in the bulk capacitors the ripple voltage amplitude must be reduced using
ceramic capacitors....."
I can understand the purpose of ceramic capacitors and Bulk capacitors.
But I could not understand How Ceramic reduces the input ripple voltage when bulk does not?
it looks like....ceramic acts as a safeguard for bulk. Since ceramic limits input ripple voltage , Bulk handles less ripple current. But both are in parallel.
Please explain the physics behind this.
I referred the application note at https://www.ti.com/lit/an/slta055/slta055.pdf