# EDGAR Filing Document

**Accession Number:** 0001684663
**File Stem:** 0000833640-26-000002
**Filing Date:** 2026-1
**Character Count:** 7325
**Document Hash:** 5c408aea3f098990a2a770b506c81bf0
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000833640-26-000002.hdr.sgml**: 20260113

**ACCESSION NUMBER**: 0000833640-26-000002

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20260105

**FILED AS OF DATE**: 20260113

**DATE AS OF CHANGE**: 20260113

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Erba Nancy
- **CENTRAL INDEX KEY:** 0001684663

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-23441
- **FILM NUMBER:** 26531070

**MAIL ADDRESS:**
- **STREET 1:** PDF SOLUTIONS, INC.
- **STREET 2:** 2858 DE LA CRUZ BLVD.
- **CITY:** SANTA CLARA
- **STATE:** CA
- **ZIP:** 95050
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** POWER INTEGRATIONS INC
- **CENTRAL INDEX KEY:** 0000833640
- **STANDARD INDUSTRIAL CLASSIFICATION:** SEMICONDUCTORS & RELATED DEVICES [3674]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 943065014
- **STATE OF INCORPORATION:** CA
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 5245 HELLYER AVE
- **CITY:** SAN JOSE
- **STATE:** CA
- **ZIP:** 95138
- **BUSINESS PHONE:** 4084149200

**MAIL ADDRESS:**
- **STREET 1:** 5245 HELLYER AVE
- **CITY:** SAN JOSE
- **STATE:** CA
- **ZIP:** 95138

## Ex-24

```

LIMITED POWER OF ATTORNEY FORSECTION 16 REPORTING OBLIGATIONS

Know all by these presents, that the undersigned hereby
constitutes and appoints each of Robert Eric Verity and
Ian Walsh, or either of them acting singly and with full
power of substitution, the undersigned's true and
lawful attorney-in-fact to:

1. Execute for and on behalf of the undersigned,
in the undersigned's capacity as an officer or director
or both of Power Integrations, Inc. (the "Company"),
Forms 3, 4 and 5 (and any amendments thereto) in
accordance with Section 16(a) of the Securities Exchange
Act of 1934, as amended (the "Exchange Act"), and
the rules thereunder;

2. Do and perform any and all acts for and on behalf
of the undersigned which may be necessary or desirable
to complete and execute any such Form 3, 4 or 5,
complete and execute any amendments thereto, and timely
file such form with the U.S. Securities and Exchange
Commission (the "SEC"), including without limitation
the filing of a Form ID or any other documents necessary
or appropriate to enable the undersigned to file the
Forms 3, 4 and 5 electronically with the SEC; and

3. Take any other action in connection with the
foregoing which, in the opinion of such
attorney-in-fact, may be of benefit to, in the best
interest of, or legally required by or for,
the undersigned, it being understood that the documents
executed by such attorney-in-fact on behalf of the
undersigned pursuant to this Limited Power of Attorney
shall be in such form and shall contain such information
and disclosure as such attorney-in-fact may approve in
such attorney-in-fact's discretion.

The undersigned hereby grants to each such
attorney-in-fact full power and authority to do and
perform any and every act and thing whatsoever required,
necessary or proper to be done in the exercise of any of
the rights and powers herein granted, as fully to all
intents and purposes as the undersigned might or could
do if personally present, with full power of substitution
or revocation, hereby ratifying and confirming all that
such attorney-in-fact, or such attorney-in-fact's
substitute or substitutes, shall lawfully do or cause
to be done by virtue of this Limited Power of
Attorney and the rights and powers herein granted.

The undersigned acknowledges that the foregoing
attorneys-in-fact, in serving in such capacity at the
request and on the behalf of the undersigned, are not
assuming, nor is the Company assuming, any of the
undersigned's responsibilities to comply with, or any
liability for the failure to comply with, any
provision of Section 16 of the Exchange Act.

This Limited Power of Attorney shall remain in full
force and effect until the undersigned is no longer
required to file Forms 3, 4 or 5 with respect to the
undersigned's holdings of and transactions in
securities issued by the Company, unless earlier
revoked by the undersigned in a signed writing
delivered to each of the foregoing attorneys-in-fact.

________________________________________
 IN WITNESS WHEREOF, the undersigned has executed this
Limited Power of Attorney as of this
9th day of January 2026.
Signed and acknowledged:

Signature

/s/Nancy Erba
Printed Name

```

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Erba Nancy<br><sub>(Last) (First) (Middle)</sub><br>5245 HELLYER AVE<br><sub>(Street)</sub><br>SAN JOSE, CA 95138<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>POWER INTEGRATIONS INC [ POWI ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2026-01-05 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director   [ ] 10% Owner<br>[X] Officer (give title below)   [ ] Other (specify below)<br>_Chief Financial Officer_ | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |

---

**Signature:** By: /s/ Eric Verity Attorney In Fact For: Nancy Erba  
**Date:** 2026-01-13

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**