Patent ID: 11916428
Assignee: INFINEON TECHNOLOGIES AUSTRIA AG
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. The apparatus as in claim 1, wherein the main battery source is hard-wired coupled in series with a first auxiliary battery source in the set via a first connection node;
wherein the first auxiliary battery source is hard-wired coupled in series with a second auxiliary battery source in the set via a second connection node;
the apparatus further comprising:
first switch circuitry controlled by the controller;
second switch circuitry controlled by the controller; and
wherein the controller is operative to: i) control the first switch circuitry to an ON state and the second switch circuitry to an OFF state to produce the battery supply voltage from a voltage at the first connection node during a first condition in which a magnitude of the main battery voltage is above the threshold level, and ii) control the second switch circuitry to an ON state and the first switch circuitry to an OFF state to produce the battery supply voltage from the second connection node in response to detecting a second condition in which the magnitude of the main battery voltage falls below the threshold level.