You are here

AN47372 - PrISM™ Technology for LED Dimming | Cypress Semiconductor

AN47372 - PrISM™ Technology for LED Dimming

Last Updated: 
Apr 05, 2021
Version: 
*F
This is an Obsolete Application Note
The document AN47372 - PrISM™ Technology for LED Dimming has been marked as obsolete. The obsolete version of this application note is still available with the below description but may not be complete or valid any longer. If you have any questions or require support in regards to the below application note content, please click here and create a technical support case.

AN47372 presents an overview of precision illumination signal modulation (PrISM™) technology for LED dimming applications. It also discusses the challenges faced in implementing high resolution PrISM and recommends solutions to address these issues.

Precision Illumination Signal Modulation (PrISM) is a Cypress technology that uses stochastic signal density modulation, which can be used for controlling the intensity of LEDs in lighting applications. This document describes the key characteristics of PrISM and its implementation using PSoC user modules. The application note also explains the challenges faced in implementing high resolution PrISM and recommends solutions to address these issues.

PrISM uses stochastic signal density modulation to generate the average signal density equivalent to dimming value.

Comparator Diagram AN47372

PrISM based dimming modulation is available as a configurable hardware block in the PowerPSoC family of devices. These devices can be used to design highly integrated LED driver circuits with power supply and LED dimming.