Other Parts Discussed in Thread: TPS563206
The customer used TPS563203 for 8.4V input and 4.2V/3A output, and found that there was oscillation in the SW pin output (see Figure 1 and Figure 2). An RC filter circuit was added later, which made some improvements. However, there was another hysteresis burr in the middle of the rising edges (see the red circled in Figure 3). The schematic diagram is attached. I have suggested that the customer increase the output capacitance and change the two 10uF parallel capacitors to 22uF and cp39 to 18pf. The customer has tried them all, but there has been no improvement.
The attachment file is the SCH and PCB file,could you pls help review and give some suggestion? Thanks.
