SLVSBD4E May 2012 – September 2021 TPS55340
PRODUCTION DATA
The TPS55340 has internal slope compensation to prevent subharmonic oscillations. The sensed current slope of boost converter can be expressed as Equation 4:
The slope compensation dv/dt can be calculated using Equation 5.
In a converter with current mode control, in addition to the output voltage feedback loop, the inner current loop including the inductor current sampling effect as well as the slope compensation on the small signal response should be taken into account, which can be modeled as seen in Equation 6:
where
If Sn << Se, the converter operates in voltage mode control rather than current mode control, and Equation 6 is no longer valid.