Oct 14, 2005 #1 S schwang1970 Member level 2 Joined Mar 11, 2005 Messages 48 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,286 Activity points 1,639 1 Did anyone know that the SC charge pump need a soft start circuit? 2 What is the purpose of soft start circuit? Thank you!
1 Did anyone know that the SC charge pump need a soft start circuit? 2 What is the purpose of soft start circuit? Thank you!
Oct 15, 2005 #2 T tsanlee Member level 3 Joined Jul 9, 2004 Messages 67 Helped 8 Reputation 16 Reaction score 1 Trophy points 1,288 Activity points 643 schwang1970 said: 1 Did anyone know that the SC charge pump need a soft start circuit? 2 What is the purpose of soft start circuit? Thank you! Click to expand... 1. I think that we do not need soft start circuit in charge pump circuit. beacuse the flying cap is so small, in charge phase the inrush is so samll. Note:Charge phase :the VIn charge flying cap. Discharge Phase :Flying Cap discharge to Vo. 2. The Soft Start purpose. 1.reduce vin inrush current. 2.smooth vout waveform.
schwang1970 said: 1 Did anyone know that the SC charge pump need a soft start circuit? 2 What is the purpose of soft start circuit? Thank you! Click to expand... 1. I think that we do not need soft start circuit in charge pump circuit. beacuse the flying cap is so small, in charge phase the inrush is so samll. Note:Charge phase :the VIn charge flying cap. Discharge Phase :Flying Cap discharge to Vo. 2. The Soft Start purpose. 1.reduce vin inrush current. 2.smooth vout waveform.