Other Parts Discussed in Thread: TPS54228, , TPS54228EVM-686
Hi support.
We will test the control board on which TPS561201DDCR was mounted.
If we will test Radiated Emission,Which of the following is effective?
Please answer in 1 to 5.
1[Getting worse] ⇔ 3 [It does not affect] ⇔ 5 [Improve]
1.Insert a chip bead in front of the VIN pin.
→How do you think about this.
By inserting a chip bead into the input loop, Only the noise component passes through a high impedance loop, and we believe that the noise may be reduced.
2.Make the Input loop short and thick.
→How do you think about this.
We believe that the noise can be reduced as much as possible by reducing the inductance component of the board wiring.
3.Make the SW loop short and thick.
SW loop is ,
Input Cap(VDD side) → H-MOS → L → Output Cap VDD side → Output Cap GND side → Input CapGND side
→How do you think about this. Which is more effective than No. 2 or No.3?
4.Insert a resistor in series with the bootstrap capacitor
→How do you think about this. I think, The slow charging speed of the bootstrap capacitor slows the speed at which H-Mos turns on.
5.Apply an effective RC snubber to the ringing that occurs when H&L-Mos is ON
→How do you think about this.
6.Apply an effective RC snubber to the Free vibration generated at pulse skip control.
→How do you think about this.Which is more effective than No.5 or No.6?
7.Other
Are there any effective measures other than NO.1 to No.6?
Best regards.
