IP Library › Granted Patent US 8,493,049
Granted Patent B2
US 8,493,049 · App. 12/960,505 · Granted Jul 23, 2013

Converter with crossover frequency responsive to switching frequency

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Quick Facts
Patent No.
US 8,493,049
App. No.
12/960,505
Granted
Jul 23, 2013
Kind
B2
Abstract

A power converter constituted of: a reference source; a clock generator exhibiting a variable frequency output, the value of the frequency of the variable frequency output responsive to an external resistor value; and an error amplifier in communication with the reference source, the error amplifier exhibiting a gain whose value is responsive to the external resistor value. Preferably the error amplifier is a transconductance amplifier. In one embodiment the power converter further exhibits a current squarer, arranged to produce a squared value of a current whose value is responsive to the external resistor and provide the squared value to the transconductance amplifier.

Claims (40)

1. A power converter comprising:

a converting unit; and

a resistor external of said converting unit,

said converting unit comprising:

a reference source;

a clock generator arranged to output a periodic clocking signal with a frequency determined responsive to the value of said external resistor, said converting unit arranged to convert an input power signal to an output power signal at a switching frequency responsive to said periodic clocking signal; and

an error amplifier in communication with said reference source and with an output sample of the power converter, said converting unit arranged to control the output of the power converter responsive to said error amplifier, said error amplifier exhibiting a gain whose value is responsive to the value of said external resistor.

2. The power converter of claim 1 , wherein said converting unit further comprises:

a current generator in communication with said external resistor, said current generator arranged to produce a reference current whose value is determined responsive to said external resistor,

wherein the value of the frequency of said clock generator is proportional to the value of said produced reference current.

3. The power converter of claim 2 , wherein the value of the frequency of said clock generator is linearly proportional to the value of said produced reference current.

4. The power converter of claim 1 , wherein said error amplifier is constituted of a transconductance amplifier.

5. The power converter of claim 4 , wherein said converting unit further comprises:

a current generator in communication with said external resistor; and

a current squarer,

said current generator arranged to produce a reference current whose value is determined responsive to said external resistor,

said current squarer arranged to produce a squared value of said reference current and provide said squared value to said transconductance amplifier, the gain of said transconductance amplifier responsive to said squared value.

6. The power converter of claim 4 , wherein said gain of said transconductance amplifier is proportional to said produced reference current.

7. The power converter of claim 4 , wherein said gain of said transconductance amplifier is linearly proportional to said produced reference current.

8. A method of controlling a power converter such that the crossover frequency of a feedback error amplifier is responsive to the switching frequency, the method comprising:

generating a current whose value is responsive to the value of an external resistor;

generating a periodic clocking signal with a frequency determined responsive to the value of said generated current;

converting an input power signal to an output power signal at a switching frequency responsive to said periodic clocking signal;

providing an error amplifier, said provided error amplifier forming a feedback circuit to control said converting so as to converge to a provided reference value; and

setting the gain of said provided error amplifier responsive to the value of said generated current.

9. The method of claim 8 , wherein the frequency of the generated periodic clocking signal is proportional to the value of said generated current.

10. The method of claim 8 , wherein the frequency of the generated periodic clocking signal is linearly proportional to the value of said generated current.

11. The method of claim 8 , wherein said provided error amplifier is a transconductance amplifier.

12. The method of claim 8 , further comprising:

producing a squared value of said generated current; and

providing said squared value to said provided error amplifier,

said setting of said gain responsive to said provided squared value.

13. The method of claim 12 , wherein said set gain of said error amplifier is proportional to the value of said generated current.

14. The method of claim 12 , wherein said set gain of said error amplifier is linearly proportional to the value of said generated current.

15. A power converter comprising:

a clock generator arranged to produce a periodic output signal with a frequency responsive to the value of an external component, the power converter arranged to convert an input power signal to an output power signal at a switching frequency responsive to said periodic clocking signal;

a means for receiving an indication of one of output voltage and current of the power converter; and

an error amplifier in communication with said means for receiving an indication of one of output voltage and current of the power converter, said error amplifier exhibiting a gain whose value is responsive to the value of said external component.

16. The power converter of claim 15 , wherein said error amplifier is constituted of a transconductance amplifier.

17. The power converter of claim 15 , wherein said gain is linearly proportional to the value of said external component.

Assignments (15)
RELEASE OF SECURITY INTEREST Recorded Mar 14, 2022
From: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT
To: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
Reel/Frame 060894/0437 →
RELEASE OF SECURITY INTEREST Recorded Mar 11, 2022
From: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT
To: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
Reel/Frame 059363/0001 →
RELEASE OF SECURITY INTEREST Recorded Mar 10, 2022
From: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT
To: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
Reel/Frame 059863/0400 →
RELEASE OF SECURITY INTEREST Recorded Mar 9, 2022
From: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT
To: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
Reel/Frame 059358/0001 →
RELEASE OF SECURITY INTEREST Recorded Feb 25, 2022
From: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
To: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
Reel/Frame 059333/0222 →
SECURITY INTEREST Recorded Jun 4, 2021
From: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
To: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT
Reel/Frame 057935/0474 →
SECURITY INTEREST Recorded Dec 24, 2020
From: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
To: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Reel/Frame 055671/0612 →
SECURITY INTEREST Recorded Jun 5, 2020
From: MICROCHIP TECHNOLOGY INC.; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
To: WELLS FARGO BANK, NATIONAL ASSOCIATION
Reel/Frame 053468/0705 →
RELEASE OF SECURITY INTEREST Recorded May 30, 2020
From: JPMORGAN CHASE BANK, N.A, AS ADMINISTRATIVE AGENT
To: MICROCHIP TECHNOLOGY INC.; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
Reel/Frame 053466/0011 →
SECURITY INTEREST Recorded Apr 24, 2020
From: MICROCHIP TECHNOLOGY INC.; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 053311/0305 →
SECURITY INTEREST Recorded Sep 18, 2018
From: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
To: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT
Reel/Frame 047103/0206 →
SECURITY INTEREST Recorded Jun 25, 2018
From: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 046426/0001 →
RELEASE OF SECURITY INTEREST Recorded May 29, 2018
From: MORGAN STANLEY SENIOR FUNDING, INC.
To: MICROSEMI CORPORATION; MICROSEMI SEMICONDUCTOR (U.S.), INC.; MICROSEMI FREQUENCY AND TIME CORPORATION; MICROSEMI COMMUNICATIONS, INC.; MICROSEMI SOC CORP.; MICROSEMI CORP. - POWER PRODUCTS GROUP; MICROSEMI CORP. - RF INTEGRATED SOLUTIONS
Reel/Frame 046251/0391 →
PATENT SECURITY AGREEMENT Recorded Feb 3, 2016
From: MICROSEMI CORPORATION; MICROSEMI SEMICONDUCTOR (U.S.) INC. (F/K/A LEGERITY, INC., ZARLINK SEMICONDUCTOR (V.N.) INC., CENTELLAX, INC., AND ZARLINK SEMICONDUCTOR (U.S.) INC.); MICROSEMI FREQUENCY AND TIME CORPORATION (F/K/A SYMMETRICON, INC.); MICROSEMI COMMUNICATIONS, INC. (F/K/A VITESSE SEMICONDUCTOR CORPORATION); MICROSEMI SOC CORP. (F/K/A ACTEL CORPORATION); MICROSEMI CORP. - POWER PRODUCTS GROUP (F/K/A ADVANCED POWER TECHNOLOGY INC.); MICROSEMI CORP. - RF INTEGRATED SOLUTIONS (F/K/A AML COMMUNICATIONS, INC.)
To: MORGAN STANLEY SENIOR FUNDING, INC.
Reel/Frame 037691/0697 →
RELEASE OF SECURITY INTEREST Recorded Jan 19, 2016
From: BANK OF AMERICA, N.A.
To: MICROSEMI CORPORATION; MICROSEMI CORP.-ANALOG MIXED SIGNAL GROUP, A DELAWARE CORPORATION; MICROSEMI SOC CORP., A CALIFORNIA CORPORATION; MICROSEMI SEMICONDUCTOR (U.S.) INC., A DELAWARE CORPORATION; MICROSEMI FREQUENCY AND TIME CORPORATION, A DELAWARE CORPORATION; MICROSEMI COMMUNICATIONS, INC. (F/K/A VITESSE SEMICONDUCTOR CORPORATION), A DELAWARE CORPORATION; MICROSEMI CORP.-MEMORY AND STORAGE SOLUTIONS (F/K/A WHITE ELECTRONIC DESIGNS CORPORATION), AN INDIANA CORPORATION
Reel/Frame 037558/0711 →