Patent ID: 11955877
Assignee: STMICROELECTRONICS S.R.L.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 13:
14. A system to set a sampling frequency of an output voltage of a DC-DC power converter during a low power burst mode of the DC-DC power converter, the system comprising:
a frequency-adaptation circuit configured to receive a clock signal having a first frequency and output an adapted clock signal having an adapted frequency that depends on the output voltage of the DC-DC power converter;
a voltage-monitoring circuit enabled by the adapted clock signal to sample the output voltage of the DC-DC power converter with the adapted frequency; and
a tracking circuit coupled to the frequency-adaptation circuit, the tracking circuit configured to receive data indicating when a burst for the low power burst mode is initiated and output a frequency-selection signal depending on the data, the tracking circuit comprising:
an up counter in communication configured to be incremented when bursts are initiated and reset when bursts are not initiated, and
a saturating up-and-down counter configured to receive an overflow signal from the up counter and increment a count each time the up counter overflows, and configured to decrement the count when up counter is reset twice consecutively, the count be provided to the frequency-adaptation circuit as the frequency-selection signal.