TAS5825M: Schematic review

Tom Shih

Part Number: TAS5825M

Tool/software:

Hi TI：

1. Please assist with schematic review (PVDD=20V ; Speaker 5W/4Ω x2)

2. PVDD electrolytic capacitor need 2pcs 100uF/35V? electrolytic capacitor can change use 1pcs 100uF/35V？

3. Bootstrap Capacitor 0.22uF voltage minimum need？

4. output inductor use TAITECH_HPC5040NF -100M is ok？

Thanks!

0 Jesse Ji 3 days ago

hi Tom

pls refer below answer:

1.if 5w is rms, pk is 10w. then the sch seems no big problem.

2.for 5w output, it should be no problem. the THD can be confirmed to see whether be worse.

3.as pvdd is 24v, 25v is recommended without using 50v.

4.you can refer the inductor selection section in DS for selecting inductor.

0 Tom Shih 1 day ago in reply to Jesse Ji

Hi Jesse:

PVDD=20V , L=10uH , C=0.68uF , Fsw=384000Hz , θ=0.5 or 0.14 , Speaker 5W/4-ohm

Ipeak_power_up = 0.04545A(BD Modulation) ; 0.01273A(1SPW Modulation or Hybrid Modulation)

Ipeak_clipping = 2.60417A(BD Modulation) ; 4.47917A(1SPW Modulation or Hybrid Modulation)

Ipeak_output_power = 1.581139A

inductor selection Isat > 4.47917A is correct?

0 Jesse Ji 21 hours ago in reply to Tom Shih

hi, Tom

yes, it's correct.

thanks

jesse

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