Loading patent…
AssigneeRenesas Electronics America Inc.
InventorsVinod Aravindakshan Lalithambika, Allan Warrington, Vipul Raithatha
Estimating the term…
A method of operating a hysteretic synthetic current-mode switching regulator is disclosed. In the switching regulator, PWM pulses (PWM) are generated by a PWM generator (20; FIG. 7) in dependence upon a ramp voltage (VR) which oscillates between upper and lower window voltages (VW+, VW−). The ramp voltage depends on a control voltage (VC) which depends on current (IL) through an inductor (6). The method comprise determining whether a period (T) equal to or greater than a given period (TREFRESH) has elapsed without a PWM pulse being generated, upon a positive determination, causing the ramp voltage to be pulled up to or above the upper window voltage (VW+) for a given duration (ΔT) and when said given duration has elapsed, causing the ramp voltage to decrease until a rising edge of a PWM pulse is generated.
A method of operating a hysteretic synthetic current-mode switching, wherein pulse-width modulation (PWM) pulses are generated by a PWM generator in dependence upon a ramp voltage which oscillates between upper and lower window voltages and which depends on a control voltage which depends on a current through an inductor, the method comprising:
A control circuit for controlling a hysteretic synthetic current-mode switching regulator wherein pulse-width modulation (PWM) pulses are generated by a PWM generator in dependence upon a ramp voltage which oscillates between upper and lower window voltages and which depends on a control voltage which depends on a current through an inductor, the device configured to:
Dependencies are inferred from the claim text.