Patent ID: 8441245
Filing Date: 2013-05-14
Classification: H02M

Abstract:
1. A hysteretic power converter comprising: a reference input signal; a switched mode power supply comprising an inductor and an electronically controlled switch, wherein the output of the switched mode power supply increases responsive to a first state of the electronically controlled switch and decreases responsive to a second state of the electronically controlled switch, said second state opposing said first state; a comparator coupled to a feedback signal and a threshold value signal and arranged to compare the feedback signal with the threshold value signal and to change the state of the electronically controlled switch of said switched mode power supply to the first state responsive to the feedback signal falling below the threshold value signal, wherein the feedback signal is responsive to the instantaneous output voltage of said switched mode power supply and the threshold value signal is responsive to said reference input signal; a reset circuit arranged to change the state of the electronically controlled switch of said switched mode power supply to the second state responsive to a predetermined condition; and an adjustment circuit comprising a low pass filter and arranged to output one of the threshold value signal and the feedback signal, said adjustment circuit arranged to adjust the output one of the threshold value signal and the feedback signal so as to reduce the difference between the reference input signal and the average output voltage of said switched mode power supply responsive to the low pass filter.