Abstract: A load line regulated switched-mode power converter supplies an output voltage (Vo) and an output current (Io) to a load (Zo). The power converter comprises an inductor (L), a switch (SW2) coupled to the inductor (L), a first impedance (Z1, Rs, Rcu), a second impedance (Z2, Rs), and a power converter controller (10). The power converter controller (10) comprises a first sense circuit (100) to obtain momentary information (SI) on a first current (11) which flows through the first impedance (Z1), and which is related to the output current (Io). A difference between a zero load voltage (VID) and the output voltage (Vo) is determined (101) to obtain a difference level (FD). A second sense circuit (102) supplies further information (FI) on a second current (12) which flows through the second impedance (Z2, Rs), and which is related to the first current (11). An integrator (103) integrates a difference between the further information (FI) and the difference level (FD) to obtain a correction signal (CS).

Abstract: There is provided a switch mode power supply circuit (10) including at least one inductive component (TRI) coupled to an associated switching device (FET SW1) for cyclically connecting the inductive component (TR1) to a source of power (Vmains). The circuit (10) includes a signal output (Vsec1) representative of a voltage (Vprim) at a junction of the at least one inductive component (TR1) to the switching device (FET SW1). The circuit (10) further comprises a hard switching amplitude detector 300) for deriving a measure of hard switching amplitude (Vhard) occurring in operation in the switching device (FET SW1), the detector (300) including a signal processing path for receiving the signal output (Vsec1) and generating the measure of hard switching amplitude (Vhard) therefrom.

Abstract: A DC-DC converter comprises a switch (S1) which periodically connects an inductor (L) to a DC-input voltage (Vi) during an on-period (Ton) of a period time (Tp), an operating frequency (fo) of the DC-DC converter is the inverse of the period time (Tp). An output (O1) of the DC-DC converter is coupled to the inductor (L) to supply an output voltage (Vo). A controller (CO) controls the operating frequency (fo) of the DC-DC converter to be substantially proportional to the output voltage (Vo) to obtain a substantially constant average duration of the on-period (Ton) as function of the output voltage (Vo).

Abstract: A power converter comprises an inductor (LP) and a controllable switch (CF) coupled to the inductor. A switch controller (1) supplies a periodic switching signal (VC1) which has a repetition time and a duty cycle to the controllable switch (CF) to generate a periodical inductor current (IL) through the inductor. A generator (2) generates an emulated signal (IE) based on timing information (TI) which represents the repetition time and the duty cycle to emulate a current signal being representative of the inductor current. A comparator (3) compares the emulated signal (IE) with the current signal (CS) to obtain an error signal (E). A generator controller (4) receives the error signal (E) to supply a control signal (VD) to the generator (2) to adapt a property of the emulated signal (IE) to become substantially equal to a property of the current signal (CS).

Abstract: A DC-DC converter with an inductor (L) and a switch (S1, S2) comprises an averaging circuit (2) which generates an average correction signal (ACS) representative for the difference of the peak current (IPEAK) and the actual average current (IAVE) through the inductor (L). A controller (2, 3, 4) controls the output voltage (VOUT) of the DC-DC converter based on regulating the duty-cycle of the switch (S1, S2) dependent on a sense signal (SES) passing a reference current level (RPCS), as in prior art peak current or valley current controlled DC-DC converters, but now using a reference current level (RPCS) that is also based on the average correction signal (ACS) and not only on the output voltage (VOUT). This enables the converter to control the output voltage (VOUT) more precisely.