TPS40210-Q1: Equations for SEPIC configuration

Jared Becker

Genius 11845 points

Part Number: TPS40210-Q1

Hi Team,

If I am using the TPS40210-Q1 as a SEPIC instead of boost, do the following equations still apply in the same manner?

Thank you in advance,

Jared

over 7 years ago

0 Garrett Roecker over 7 years ago

TI__Mastermind 21720 points

Hi Jared,

Since the topology is a SEPIC the equations will change slightly. In a SEPIC the switch will see the output current as well as the input current. This means that the peak current during CCM operation will be equal to the input current plus the output current plus the inductor ripple current. Please see the attached document for equations.

Thanks,

Garrett

TPS40210_SEPIC_switch_peak_current.pdf

Power management

Power management forum

TPS40210-Q1: Equations for SEPIC configuration