Digitale Schaltwandlersteuerung

Details

Veröffentlichungs-Nr.

EP2573575

Aktenzeichen

EP11182620

Anmeldetag

23. September 2011

Veröffentlichung

13. April 2016

Erteilung

13. April 2016

Rechtsraum

EP

IPC

G05F1/46H05B33/08

Abstract

A control circuit for controlling the operation of a switching converter to provide a regulated load current to a load is disclosed. The switching converter includes an inductor and a high-side and a low side-transistor for switching the load current provided via the inductor. The circuit includes: a digital modulator configured to provide a modulated signal having a duty cycle determined by a digital duty cycle value; a current sense circuit coupled to at least one of the transistors and configured to regularly sample a load current value; a comparator, coupled to the current sense circuit and configured to compare the sampled load current value with a first threshold and provide a respective comparator output signal, the first threshold being dependent on a defined desired output current and the comparator output signal being indicative of whether the sampled current value is lower or greater than the desired output current; and a regulator configured to receive the comparator output signal and to calculate an updated digital duty cycle value. Furthermore, a corresponding method for controlling the operation of a switching converter is disclosed.

Anmelder

Firma

Infineon Technologies AG

Land

🇩🇪 Deutschland

Fachgebiete