AN47372 - PrISM™ Technology for LED Dimming | Cypress Semiconductor
AN47372 - PrISM™ Technology for LED Dimming
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.
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.