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:
Dec. 12, 2000
Filed:
Dec. 17, 1998
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A DC-DC converter that generates a sense signal representing a voltage drop across a low-side switch when the low-side switch is on. The sense signal is inverted and stored in a 'hold' capacitor until the beginning of the next switching cycle. More specifically, an input node receives an input voltage V.sub.IN. A driver stage coupled to the input node and to a reference node chops V.sub.IN into a square wave under control of a PWM signal. The chopped V.sub.IN signal is coupled to an intermediate output node. An output stage coupled to the intermediate output node converts the chopped V.sub.IN signal to an output voltage V.sub.OUT to a load coupled to an output node. A sense unit coupled to sense a voltage on the intermediate output node generates a voltage signal indicating current flowing in the load.