Tuesday, June 16, 2009
Linear has announced a two terminal constant current device.
http://www.linear.com/pc/productDetail.jsp?navId=H0,C1,C1003,C1040,C1055,P88400
This is a programmable current source that can be set to anything up to 200ma and upwards of 40 volts.
It's a good, cheap power controller for LEDs.
http://cds.linear.com/docs/Datasheet/3092p.pdf
Cost is in the $2.00 range. It might be necessary to parallel them or to use a current mirror to get the right current for specific LED strings.
http://www.linear.com/pc/productDetail.jsp?navId=H0,C1,C1003,C1040,C1055,P88400
This is a programmable current source that can be set to anything up to 200ma and upwards of 40 volts.
It's a good, cheap power controller for LEDs.
http://cds.linear.com/docs/Datasheet/3092p.pdf
Cost is in the $2.00 range. It might be necessary to parallel them or to use a current mirror to get the right current for specific LED strings.
Cypress has released a version of the PSoC that includes up to 4 MOSFETs for the purpose of controlling LEDs. Paired with the Cree LEDs this is a powerful tool for control of the devices. It would support calibration with a reference sensor, and accurate timing. Lots of options.
PowerPSoC® Embedded Power Controller
http://www.cypress.com/?id=2109
PowerPSoC® Embedded Power Controller
http://www.cypress.com/?id=2109
Labels: PSoC for LEDs
