SLVAFQ9 January   2024 TPS92201

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Why Building Automation Need IR LED in Video Doorbell, Security Cam System
  5. 2Basic Dimming Knowledge – PWM and Analog Dimming
    1. 2.1 Analog Dimming
    2. 2.2 PWM Dimming
  6. 3Video Doorbell, Security Cam Industry Common Design for IR LED
    1. 3.1 External PWM Low Pass Filter
    2. 3.2 Industry Application Advantage and Disadvantage
  7. 4TPS92201 Design in Video Doorbell, Security Cam
  8. 5Summary
  9. 6References

Abstract

With the progress of building automation, more and more end equipments use IR LEDs for infrared sensing, especially for video doorbell and security cam. But the current IR LED driver design has many criticisms. This application report showcases how to use TPS92201 in such application with the advantages of better accuracy of reference voltage, smaller size, and the ripple for output voltage.