Transcription of Capacitor Calculation for Buck converter IC : Power …
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Capacitor Calculation for Buck converter IC : Power …
1 of 6 - Rev. C 2014 ROHM Co., Ltd. All rights reserved. VIN CO DL RLQ1 VOUTIO ONOFFCINICINIINIDDILIDICO tONtOFFtON tOFFtON tOFF ttttttQ1 IDDIOIOIDIINILIO ILICOICINC urrent which flows at tOFFC urrent which flows at tONSwitching Regulator IC series Capacitor Calculation for buck converter IC This application note explains the Calculation of external Capacitor value for buck converter IC circuit. buck converter Figure 1 is the basic circuit of buck converter . When switching element Q1 is ON, current flows from VIN through the coil L and charges the output smoothing Capacitor Co, and the output current Io is supplied. The current which flows into the coil L at this time induces a magnetic field, and electric energy is transformed into magnetic energy and accumulated for storage. When switching element Q1 is OFF, free-wheeling diode D turns ON and energy stored in L is then released to the output side. Calculation of Input Capacitor Rated voltage of input Capacitor must be higher than the maximum input voltage.
Application Note 3 of 6 © 2014 ROHM Co., Ltd. All rights reserved. Capacitor Calculation for Buck converter www.rohm.com 2014.02 - Rev. C …
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