Other Parts Discussed in Thread: TPS63020, , TPS63805, TPS63802
Tool/software: WEBENCH® Design Tools
When driving TEC, it was abnormal when working in BUCK mode. The whole circuit input 3.3v voltage and output 1.3v-5.4v voltage range.TEC generates 300-400ma current;At present, when the circuit is in boost mode, it works normally. In BUCK mode, the Vfb voltage is abnormally increased.
For example, set output 1.3v, actual Vout output 2.2v, Vfb= 0.56v;May I ask how he caused it? How can I modify the circuit to solve it? Thank you