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How to use analog dimming with TPS6116x

Posted: 05 Aug 2011 ?? ?Print Version ?Bookmark and Share

Keywords:white LED? drivers? analog dimming?

The TPS6116x family of devices are simple, white LED drivers that can drive up to 10 LEDs in series. The CTRL pin on these devices is the input for the integrated analog dimming circuitry but can only be used for PWM signals switching higher than 5kHz. This application report shows a simple, external circuit that can be used to perform analog dimming from PWM signals that are below 5kHz as well as from other analog sources. The method discussed in this document can also be applied to other voltage-controlled switching regulators. An Excel spreadsheet design tool is discussed that can aid designers in choosing proper components.

View the PDF document for more information.





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