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tps54335A PWM sometimes add a pulse at 1A load

Other Parts Discussed in Thread: TPS54335A

Dear Team:

 Our customer used TPS54335A and got a strange PWM waveform (add a puls ) as attached file, when load =1A.

Because TPS54335A is current mode, it should fix PWM frequency. Circuit design: VIn=20V, Vout=12V, Iout(max)=3A

Could you explain the symptom?