US 10,368,406 B2
Feed forward controlled voltage to current source for LED driver
Isaac Cohen, Dix Hills, NY (US)
Assigned to Texas Instruments Incorporated, Dallas, TX (US)
Filed by Texas Instruments Incorporated, Dallas, TX (US)
Filed on Jan. 26, 2017, as Appl. No. 15/416,936.
Application 15/416,936 is a division of application No. 13/597,000, filed on Aug. 28, 2012.
Claims priority of provisional application 61/528,619, filed on Aug. 29, 2011.
Claims priority of provisional application 61/670,002, filed on Jul. 10, 2012.
Claims priority of provisional application 61/546,155, filed on Oct. 12, 2011.
Claims priority of provisional application 61/546,159, filed on Oct. 12, 2011.
Prior Publication US 2017/0142789 A1, May 18, 2017
Int. Cl. H05B 33/08 (2006.01); G05F 1/46 (2006.01); H05B 37/02 (2006.01); H02M 7/44 (2006.01); H02M 1/42 (2007.01); H02M 3/156 (2006.01); H02M 1/08 (2006.01); H02M 1/44 (2007.01); H02M 3/04 (2006.01); H02M 7/04 (2006.01); H02M 1/00 (2006.01)
CPC H05B 33/0815 (2013.01) [G05F 1/468 (2013.01); H02M 1/08 (2013.01); H02M 1/4225 (2013.01); H02M 1/44 (2013.01); H02M 3/04 (2013.01); H02M 3/156 (2013.01); H02M 7/04 (2013.01); H02M 7/44 (2013.01); H05B 33/0824 (2013.01); H05B 37/02 (2013.01); H02M 2001/0009 (2013.01); Y02B 20/347 (2013.01); Y02B 70/126 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A device, comprising:
a DC input configured to receive a DC input voltage;
a DC output configured to deliver a DC output voltage;
a current sensor for measuring a DC input current and generating a current signal related to the DC input current;
a comparator circuit for comparing a reference signal derived from a DC output voltage with the current signal to generate a comparison signal;
a control circuit coupled to the comparator circuit, and responsive to the comparison signal, the control circuit is configured to regulate an output current to be directly proportional to a DC input voltage and independent of the DC output voltage.