LM2766: LM2766 to power audio equipment. Special design precautions for charging high capacity.

RIGAS MAKROPOULOS

Part Number: LM2766

Tool/software:

Hi there!! As I have no previous experience with switching voltage converter ICs, I'd like to ask if there are any special precautions to be taken in order to power hifi audio equipment.

I plan to use a 10uF/10v MLCC ceramic (0805) cap (for C1) and to further minimise the power supply footprint

a few 47u/10V 0805 MLCCs. Also a 680uH choke from the output of the chip to the rest of the circuit. Are there any inrush current issues?

Any precautions during startup or power off?

Do I need to put any flyback diode in parallel with the choke? Are there any voltage spikes regarding the IC operation?

I have attached a quick schematic of what I plan to do. Let me know if there are any issues that I have to be aware of.

7 months ago

0 Nini Zhong 7 months ago

TI__Genius 10185 points

there maybe inrush current issues, because you add so many capacitance at the vout. Could I ask what the choke used for?

0 RIGAS MAKROPOULOS 7 months ago in reply to Nini Zhong

Prodigy 10 points

Thanks for your input! The purpose of the choke is to eliminate any switching frequency noise that may spread to the rest of the circuit. Do you think that my configuration could be harmful to the IC? The load circuit draws about 6-8mA @6V max.

0 RIGAS MAKROPOULOS 7 months ago in reply to RIGAS MAKROPOULOS

Prodigy 10 points

Apart from the IC, do you think that the rest of the circuit is in potential failure risk, due to the above power supply configuration?

0 Nini Zhong 7 months ago in reply to RIGAS MAKROPOULOS

TI__Genius 10185 points

Actually the 6-8mA should be okay. But for other part I can' t be sure.

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LM2766: LM2766 to power audio equipment. Special design precautions for charging high capacity.