Other Parts Discussed in Thread: TPS62172
Hi team,
My customer faced an output voltage ripple problem during using TPS62172. The schematic is given following.
They found a high-frequency ripple/glitch at the output voltage. It is around 60mV. The glitch/ringing occurs at each switching action.
And here gives the schematic they designed, the inductor is 8.2uH, the capacitor is 100uF+100nF+10uF.
They have tried to add a series resistor connected with the inductor. The first-stage choice is 6.8Ohm.
After adding this resistor, the output voltage ripple/glitch is decreased to around 30mV.
Thus, the questions I want to ask is:
1. Why our TPS62172 has a ripple/glitch like this?
2. Is this kind of adding resistor reasonable? Do you have any other recommendations that can relieve this phenomenon?
