Patent ID: 8729815
Filing Date: 2014-05-20
Classification: H05B,Y02B

Abstract:
1. A current control system, comprising: front end circuitry configured to receive an input voltage and provide a regulated front end direct current (DC) voltage; current source circuitry coupled to the front end circuitry, wherein the current source circuitry comprises a first input voltage terminal and a second input voltage terminal, wherein the current source circuitry is configured to receive the regulated front end DC voltage at the first input voltage terminal and to output a current using the regulated front end DC voltage and based on an input voltage received at the second input voltage terminal, wherein the current source circuitry comprises DC-to-DC converter circuitry, the DC-to-DC converter circuitry including a controller configured to cause the DC-to-DC converter circuitry to output a peak current based on an analog voltage monitored at an analog current adjustment input in the controller; dimming interface circuitry configured to output a pulse width modulation signal; and conversion circuitry coupled to the current source circuitry and the dimming interface circuitry, the conversion circuitry configured to receive the pulse width modulation signal and to output an analog voltage to the input voltage terminal of the current source circuitry, such that the current output by the current source circuitry is based on the output analog voltage of the conversion circuitry.