POWER INTEGRATIONS INC 10-Q

ITEM 1A. RISK FACTORS As of the date of this filing, the risk factors have not changed substantively from those disclosed in Part I Item 1A in our Annual Report on Form 10-K for the year ended December 31, 2020, which risk factors are incorporated by reference in this report. ​ 29 Table of Contents ​ ​ ITEM 6. EXHIBITS ​ ​ ​ ​ ​ Incorporation by Reference EXHIBIT NUMBER Exhibit Description ​ Form File Number Exhibit/Other Reference Filing Date Filed Herewith 3.1 ​ Restated Certificate of Incorporation ​ 10-K ​ 000-23441 ​ 3.1 ​ 2/29/2012 ​ ​ 3.2 ​ Amended and Restated Bylaws ​ 8-K ​ 000-23441 ​ 3.1 ​ 4/26/2013 ​ ​ 4.2 ​ Reference is made to Exhibits 3.1 to 3.2 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 10.1 ​ 2021 Compensation Arrangements with Named Executive Officers ​ 10-K ​ 000-23441 ​ Item 9B ​ 2/5/2021 ​ ​ 10.2 † ​ Amendment Number Twelve to the Amended and Restated Wafer Supply Agreement, between Power Integrations International, Ltd. and Lapis Semiconductor Co., Ltd. (formerly OKI Semiconductor Co., Ltd.), effective as of September 17, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ X 31.1 ​ Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 ​ ​ ​ ​ ​ ​ ​ ​ ​ X 31.2 ​ Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 ​ ​ ​ ​ ​ ​ ​ ​ ​ X 32.1** ​ Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 ​ ​ ​ ​ ​ ​ ​ ​ ​ X 32.2** ​ Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 ​ ​ ​ ​ ​ ​ ​ ​ ​ X 101.INS ​ XBRL Instance Document - The instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document. ​ ​ ​ ​ ​ ​ ​ ​ ​ X 101.SCH ​ Inline XBRL Taxonomy Extension Schema Document ​ ​ ​ ​ ​ ​ ​ ​ ​ X 101.CAL ​ Inline XBRL Taxonomy Extension Calculation Linkbase Document ​ ​ ​ ​ ​ ​ ​ ​ ​ X 30 Table of Contents ​ 101.DEF ​ Inline XBRL Taxonomy Extension Definition Linkbase Document ​ ​ ​ ​ ​ ​ ​ ​ ​ X 101.LAB ​ Inline XBRL Taxonomy Extension Label Linkbase Document ​ ​ ​ ​ ​ ​ ​ ​ ​ X 101.PRE ​ Inline XBRL Taxonomy Extension Presentation Linkbase Document ​ ​ ​ ​ ​ ​ ​ ​ ​ X 104 ​ Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ All references in the table above to previously filed documents or descriptions are incorporating those documents and descriptions by reference thereto. † Portions of this exhibit (indicated by asterisks) have been omitted as being immaterial and is the type of information that Power Integrations, Inc. treats as private or confidential . ** The certifications attached as Exhibits 32.1 and 32.2 accompanying this Form 10-Q, are not deemed filed with the SEC, and are not to be incorporated by reference into any filing of Power Integrations, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, whether made before or after the date of this Form 10-Q, irrespective of any general incorporation language contained in such filing. ​ 31 Table of Contents ​ SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. ​ ​ POWER INTEGRATIONS, INC. ​ ​ ​ ​ Dated: April 29, 2021 By: /s/ S ANDEEP N AYYAR ​ ​ ​ Sandeep Nayyar ​ ​ ​ Chief Financial Officer ​ ​ ​ (Duly Authorized Officer, Principal Financial Officer and Principal Accounting Officer) ​ ​ ​ 32