The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 03, 2016
Filed:
Oct. 08, 2014
Stmicroelectronics International N.v., Amsterdam, NL;
Stmicroelectronics S.r.l., Agrate Brianza, IT;
Ranajay Mallik, Ghaziabad, IN;
Luigi Abbatelli, Catania, IT;
Giuseppe Catalisano, Carlentini, IT;
Akshat Jain, Nahan, IN;
STMICROELECTRONICS INTERNATIONAL N.V., Amsterdam, NL;
STMICROELECTRONICS S.R.L., Agrate Brianza, IT;
Abstract
A drive transistor is connected to a resonant load in a low-side drive configuration. The voltage across the conduction terminals of the drive transistor is sensed and compared to an over-voltage threshold. An over-voltage signal is asserted in response to the comparison. The drive transistor is controlled by a PWM control signal in normal mode. In response to the assertion of the over-voltage signal, the drive transistor is forced to turn on (irrespective of the PWM control signal) to relieve the over-voltage condition. Operation of the circuit may be disabled or forced into soft start mode in response to the assertion of the over-voltage signal. Additionally, the pulse width of the PWM control signal may be reduced in response to the assertion of the over-voltage signal.