Current mode control arrangement with load dependent ramp signal added to sensed current waveform

摘要

A switching converter in which current mode voltage regulation is implemented includes circuitry to add ramp compensation to the sensed current signal at light load and reduce or disable this ramp signal compensation at heavy load 257, 258, 259, 260. This load dependent ramp signal improves the stability of the converter and maintains its inherent current limit performace over a wide range of loading.