Patent ID: 9680375
Date: 2017-06-13
CPC Classifications: H02M

Claim:
1. A switching mode power supply, comprising: an output filter configured to provide output of the switching mode power supply; a driver coupled to the output filter and configured to switch current to the output filter; and a pulse width modulator configured to generate pulses that control switching of current by the driver, the pulse width modulator including: spread spectrum logic configured to randomize timing of the pulses generated by the pulse width modulator, including a counter configured to control the randomized timing of the pulses that control switching of current by the driver; and pulse adaptation circuitry; wherein the pulse adaptation circuitry is configured to: identify an instantaneous excursion of the output of the switching mode power supply beyond a predetermined threshold; and change a count value of the counter to modify the randomized timing of the pulses produced by the pulse width modulator based on the identified instantaneous excursion.