Patent · US Active

Self-oscillating resonant converter-based light emitting diode (LED) driver

US9185767B2 · kind B2 · utility

3Cited by

5References

27Claims

0Family size

Assignee

CIRRUS LOGIC, INC. · US

Inventors

Ramin Zanbaghi · Austin, US
Arnab Kumar Dutta · Austin, US
Firas Azrai · Austin, US

Key dates

Filing date	Jan 17, 2014
Grant date	Nov 10, 2015
Priority date	—
Expiry date	Jan 17, 2034

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02B70/10
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A self-oscillating resonator (SOR) may be used to control current through light emitting diodes (LEDs). The SOR may be started and stopped by a controller coupled to a transistor switch in the SOR. The controller may output a control signal that starts and stops the SOR by coupling a supply voltage or a ground to a base of the transistor switch in the SOR. Additional control over the current output to the LEDs may be gained through a resistive DAC coupled to the SOR and duty cycling the SOR.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.