US 10,707,758 B2Granted

Power converter with predictive pulse width modulator control

AssigneeSilanna Asia Pte Ltd

InventorTrevor M. Newlin

Life of this patent

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Abstract

Various methods and devices that involve control circuits for power converters are disclosed. One method comprises controlling a switch using a control signal based on a comparison signal. The switch controls a transfer of power between an input node, which receives an input, and an output node. The method comprises measuring an output of the power converter, generating an error signal based on the output, generating a periodic ramp signal with a varying period, providing the error signal to a first input terminal of a comparator, providing the ramp signal to a second input terminal of the comparator, and generating the comparison signal based on the error signal and the ramp signal using the comparator. The method comprises increasing a slope of the ramp signal in response to an increase in the input, and increasing the slope of the ramp signal in response to a decrease in the varying period.

Claims16

Dependent claims

A power converter comprising:

an input node to receive an input voltage;
an output node to provide an output voltage;
a first switch configured to control a transfer of power from the input node to the output node;
a periodic ramp generator circuit to generate a ramp signal with a slope and a varying period, the first switch being configured to be controlled based on the ramp signal;
a first control circuit communicatively coupled to the periodic ramp generator circuit and that is configured to cause a change of the slope of the ramp signal based on a change in the input voltage;
a second control circuit communicatively coupled to the periodic ramp generator circuit and that is configured to cause a change of the slope of the ramp signal based on a change in the varying period of the ramp signal;
and
a third control circuit communicatively coupled to the periodic ramp generator circuit and that is configured to cause a change of the slope of the ramp signal based on a change in the output voltage.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/382,546Filed 12 Apr 2019 · continuation
Priority: 26 Oct 2016
Published: US 2019/0238056 A11 Aug 2019
Granted: 7 Jul 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

H02M 3/158
With automatic control of output voltage or current, e.g. switching regulators: including plural semiconductor devices as final control devices…
H03K 7/08
Modulating pulses with a continuously-variable modulating signal: duration or width modulation ; Duty cycle modulation
H02M
Apparatus for conversion between ac and ac, between ac and dc, or
H03K
Pulse technique

Family

Application62/413,005Us provisional application · filed 26 Oct 2016
Application15/347,693Parent of this continuation · filed 9 Nov 2016
Application15/877,869Parent of this continuation · filed 23 Jan 2018
US 9,893,621 B1Parent of this continuation · filed 13 Feb 2018
US 2019/0238056 A1Pre-grant publication · published 1 Aug 2019
US 10,263,521 B2Parent of this continuation
US 2018/0152106 A1Published application
US 10,707,758 B2This patent

From the US filing history. Foreign family members aren’t listed.