Patent ID: 9608520
Date: 2017-03-28
CPC Classifications: H02M

Claim:
1. A voltage converter comprising: a voltage conversion circuit including an inductor configured to be charged and discharged to facilitate conversion of an input voltage to an output voltage, the voltage conversion circuit further including a switch configured to allow the inductor to be charged and discharged; a logic drive unit configured to provide a drive signal to the switch to control the charging and discharging of the inductor; and a mode control unit configured to provide a mode-switching signal to the logic drive unit to control switching between a pulse width modulation (PWM) mode and a pulse frequency modulation (PFM) mode based on an inductance current associated with the inductor and a load-current threshold that is substantially constant and substantially independent of the input voltage and the output voltage, the mode control unit further configured to provide compensation for a change in the input voltage and the output voltage to facilitate the substantially constant load-current threshold and to generate a switching threshold signal representative of the compensation.