Figure 2-1 is the schematic of TPS929240-Q1 EVM.

• Placing a 4.7 μF (C9) and a 100 nF (C16) decoupling ceramic capacitors close to the VBAT pin of each TPS929240-Q1 is highly recommended to obtain good EMC performance.
• Adding the same value capacitors is also required for SUPPLY input (C10 and C17) and VLDO output (C11 and C18).
  • C10 and C17 can be added after anti-reverse diode D57. D57 acts as a filter to pass positive noise and block negative noise so that the common-mode noise entering the control module decreases.

• Placing a typically 1 nF ceramic capacitor (C20) in parallel with R_REF close to the VREF pin to improve the noise immunity.
  • The capacitance of C20 can up to 2.2 nF.
• To achieve good EMC performance, TI recommends adding a 1 nF ceramic capacitor (C30-C53) on each of the output channels.
• TPS929240-Q1 EVM jumpers configuration during test:
  • On board buck is used to output 5.5V for SUPPLY.
  • R_REF is set to 6.34kΩ.