Hello all,
Here's my schematic so far:
The circuit's input is a 24V DC carrier with a 2.176 MHz frequency that needs to be filtered out. Steady state current is about 700mA when the supply has its load.
I need the inrush current to be at about 400 mA or less. Here's what I measure with the circuit as pictured above:
That first spike is about 980mA and the second spike is about 660mA. A bit higher than I need.
My understanding is that the first spike is my inrush before the regulator turns on (input caps) and the second spike is after the regulator turns on (output caps).
If I remove the 1uF capacitor on my 5V output I get the following:
Only the initial current spike 980mA remains.
Here's a closer picture of that first spike if it helps:
Any advice someone can offer me to reduce this inrush current would be appreciated.
Thanks!
Here's my schematic so far:
The circuit's input is a 24V DC carrier with a 2.176 MHz frequency that needs to be filtered out. Steady state current is about 700mA when the supply has its load.
I need the inrush current to be at about 400 mA or less. Here's what I measure with the circuit as pictured above:
That first spike is about 980mA and the second spike is about 660mA. A bit higher than I need.
My understanding is that the first spike is my inrush before the regulator turns on (input caps) and the second spike is after the regulator turns on (output caps).
If I remove the 1uF capacitor on my 5V output I get the following:
Only the initial current spike 980mA remains.
Here's a closer picture of that first spike if it helps:
Any advice someone can offer me to reduce this inrush current would be appreciated.
Thanks!