Dears ,
I use TPS53015 as DCDC , Vin=12V ,Vout= 5V /4A, Please help to Review sch as feil ,many thanks !
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Dears ,
I use TPS53015 as DCDC , Vin=12V ,Vout= 5V /4A, Please help to Review sch as feil ,many thanks !
The inductor value is quite low the ripple current is greater than the output current.
Increase the inductor to 3.3uH to 4.7uH you want to have ~30% ripple current in the inductor see eq 3 in datasheet.
Add a diode from GND to SW and a resistor between SW pin to SW node between the FETs.
See Figure 1 in https://www.ti.com/lit/ug/sluu944/sluu944.pdf?ts=1592322850416
Do not install R913 and C1247.
Change R911 to 10k and R912 to 1.82k
Dear David
many thanks, the File was as you suggested ,please help to review ,is there any wrong ,many thanksTPS53015.pdf
Looks good.
On your pcb layout, review the layout in the evm guide and follow the suggestions on page 20 of the datasheet.
https://www.ti.com/lit/ds/symlink/tps53015.pdf https://www.ti.com/tool/TPS53015EVM-126/