ZHCSK35C March 2019 – March 2021 TPS92682-Q1
PRODUCTION DATA
Switching converters with peak current mode control are subject to subharmonic oscillation for duty cycles greater than 50%. To avoid instability, the control scheme adds an artificial ramp to the sensed switch current (shown in Figure 7-9). The required slope of the artificial ramp depends on the input voltage, VIN, output voltage, VO, inductor L, and switch current sense resistor RIS. The TPS92682-Q1 device provides a programmable slope compensation with seven levels of slope magnitude to simplify and enhance the performance of common switching converter topologies, such as boost, boost-to-battery, and SEPIC. The slope magnitude can be programmed through CHxISLP in the ISLOPE Register. The Application and Implementation section includes calculations for the choice of correct slope magnitude for a given application.