Patent · US Active

Fast transient load response device for switched-mode power supply

US10720830B2 · kind B2 · utility

0Cited by

8References

15Claims

0Family size

Assignee

NXP B.V. · NL

Inventors

Melaine Philip · Caen, FR
Fabien Boitard · Feldkirchen in Kärnten, AT

Key dates

Filing date	Apr 25, 2019
Grant date	Jul 21, 2020
Priority date	—
Expiry date	Apr 25, 2039

Classification

Technology area (CPC H)Electricity
CPC primaryH02M3/1566
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

This specification discloses methods and systems for reducing negative undershoot during transient load response for a PWM (Pulse Width Modulation) boost power converter. In some embodiments, reduction of negative undershoot during transient load response is achieved by overriding the PWM duty cycle to a maximum duty cycle when VDDBOOST drops during load step. This maximum duty cycle (“max”) mode is triggered when VDDBOOST is within a hysteresis window. Setpoint for maximum duty cycle is versus DCDC converter output and input voltage. In some embodiments, a lookup table is implemented for determining the setpoint for maximum duty cycle.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.