US 10,651,730 B2 · Methods and apparatus for simultaneously generating multiple output voltage levels utilizing switched capacitor DC-DC converter

Abstract

A switched capacitor DC-DC converter, which includes a pulse frequency modulation circuit, a multiplexing pulse-width modulation circuit, and a switched capacitive element, is disclosed. The switched capacitive element is coupled between the pulse frequency modulation circuit and the multiplexing pulse-width modulation circuit. The pulse frequency modulation circuit uses a DC source signal to charge the switched capacitive element. The pulse frequency modulation circuit provides a group of output signals by multiplexing the switched capacitive element and reduces reverse current to the switched capacitive element when updating each of the group of output signals.

Claims20

Dependent claims

A modulated switched capacitor DC-DC converter comprising:

a switched capacitive element coupled between a pulse frequency modulation (PFM) circuit and a time multiplexing and pulse-width modulation (PWM) circuit;
the PFM circuit configured to use a DC source signal to charge the switched capacitive element;
and
the time multiplexing and PWM circuit configured to:
provide a plurality of output voltages via a corresponding plurality of output connection nodes by multiplexing the switched capacitive element to each of the plurality of output connection nodes;
and
reduce a reverse current to the switched capacitive element when updating each of the plurality of output voltages.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/039,551Filed 19 Jul 2018 · us provisional application

Priority

11 Sep 2017

Published

US 2019/0081558 A114 Mar 2019

Granted

12 May 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification3 codes

H02M 3/07
Using resistors or capacitors, e.g. potential divider: using capacitors charged and discharged alternately by semiconductor devices with control…
H02M 1/009
Converters characterised by their input or output configuration: having two or more independently controlled outputs
H02M
Apparatus for conversion between ac and ac, between ac and dc, or

Methods and apparatus for simultaneously generating multiple output voltage levels utilizing switched capacitor DC-DC converter

Life of this patent

Methods and apparatus for simultaneously generating multiple output voltage levels utilizing switched capacitor DC-DC converter

Life of this patent

Abstract

Claims20