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:
Aug. 20, 2018
Filed:
Apr. 15, 2015
Intersil Americas Llc, Milpitas, CA (US);
Nicholas Ian Archibald, San Francisco, CA (US);
Allan Richard Warrington, Kent, GB;
INTERSIL AMERICAS LLC, Milpitas, CA (US);
Abstract
A circuit for generating an output voltage to a top node of a plurality of LED strings. The circuit includes an inductor having a load current flowing therethrough and a switching transistor responsive to a switching control signal. An integrator generates a compensation voltage responsive to a voltage at a bottom node of the LED string and a reference voltage. Circuitry for combiningana correctionoffset with the compensation voltage is responsive to the compensation voltage and the load current through the inductor.The offset is generated only during a step load change of the load current and substantially reduces voltage transients from the compensation voltage and the output voltage.A summation circuit sums the compensation voltage including thecorrectionoffset with at least the voltage at the bottom node of the LED string to generate a first control signal. A latch generates the switching control signal responsive to the first control signal and a leading edge blanking signal.