Patent ID: 7898218
Filing Date: 2011-03-01
Classification: H02M,Y02B

Abstract:
1. A converter comprising: a generator generating a pulse width modulation signal for controlling an inductor; and a control circuit coupled to said generator for controlling a switching frequency of said pulse width modulation signal, wherein a first switching frequency is selected when a load current is less than a predetermined current level, and wherein a second switching frequency that is greater than said first switching frequency is selected when said load current is greater than said predetermined current level, wherein a peak-to-peak ripple current of said inductor decreases from a first ripple current level to a second ripple current level that is less than said first ripple current level in response to said switching frequency of said pulse width modulation signal if said load current increases from a first current level that is less than said predetermined current level to a second current level that is greater than said predetermined current level.