SLUUCQ0A may   2023  – june 2023 TPS922052 , TPS922053 , TPS922054 , TPS922055

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Warnings and Cautions
  6. 3Description
    1. 3.1 Typical Applications
  7. 4Test Setup
    1. 4.1 Connector Description
    2. 4.2 Input/Output Connection
  8. 5Typical Characteristics Curves and Waveforms
    1. 5.1 Efficiency
    2. 5.2 Line Regulation
    3. 5.3 Load Regulation
    4. 5.4 Analog Dimming Performance
    5. 5.5 PWM Dimming Performance
    6. 5.6 Hybrid Dimming Performance
    7. 5.7 Flexible Dimming Performance
  9. 6Schematic
  10. 7Layout
  11. 8Bill of Materials
  12. 9Revision History

3 Description

The TPS92205xEVM provides an LED driver based on the TPS92205x buck switching regulator. It is designed to operate with an input voltage in the range of 4.5 V to 65 V. The EVM is set up for a default output current of 4A and can work in four configurable dimming options. Please refer to TPS92205x datasheet (literature number: SLVSGG9) for more detailed information on configurable dimming options. By applying 0-100% duty cycle PWM signal on ADIM/HD pin or PWM/EN pin, device is able to operate in analog dimming or PWM dimming respectively. For analog dimming, it can provide dimming ratio up to 256:1. For PWM dimming, it can output pulse with width down to 200 ns. The TPS92205x integrates hybrid dimming mode that combines analog dimming and PWM dimming with a fixed transition point (1/8 target current) to maximize dimming performance. To further increase the flexibility of dimming control, flexible dimming mode is also available to independently control LED current value and the on/off behavior. The TPS92205x can provide features like wide voltage range, high current rating and ultra-deep dimming range.