EXHIBIT 23.1 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in this registration statement on Form S-8 (File No. 33-43691) of our report dated April 23, 1999, relating to the consolidated financial statements and financial statement schedule of Supertex, Inc., which appears in Supertex, Inc.'s Annual Report on Form 10-K for the year ended March 31, 1999. PricewaterhouseCoopers LLP San Jose, California September 29, 1999