Patent ID: 9685867
Date: 2017-06-20
CPC Classifications: H02M

Claim:
1. An electrical power supply circuit for delivering power from a power source to a load, the electrical power supply circuit comprising: an power input node coupleable to the power source; a step-up converter having an input coupled to the power input node; a step-down converter having a step-down converter node and an output coupleable to the load; a conductive bypass path; a switching stage that includes: a first switch configured to selectively couple the step-down converter node of the step-down converter to the input of the step-up converter via the bypass path that bypasses the step-up converter; a second switch configured to selectively couple an output of the step-up converter to the step-down converter node of the step-down converter; and a third switch configured to selectively couple the step-down converter node of the step-down converter to a ground; and a controller configured to: