SDAA391 June   2026 TPS922050 , TPS922051 , TPS922052 , TPS922053 , TPS922054 , TPS922055

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2EN/PWM Timing Design to Avoid Repeated Soft-Start
    1. 2.1 TPS922050/1 Fast PWM Dimming Behavior
    2. 2.2 TPS922052/3/4/5 Fast PWM Dimming Behavior
    3. 2.3 Timing Design Guideline
    4. 2.4 Test Verification and Results
  6. 3Peripheral Circuit Parameter Optimization
    1. 3.1 Compensation Network
    2. 3.2 C O U T
  7. 4Summary
  8. 5References

2.1 TPS922050/1 Fast PWM Dimming Behavior

For TPS922050/1, the LED current follows the DIM input with fast response during PWM dimming. As Figure 2-1 shows, when the PWM input is high, inductor current ramps to the regulated value. When the PWM input is low, the LED current falls to zero. Because the device is intended to support fast PWM dimming, TPS922050/1 is a good fit for lower-current strobe designs.

TPS922050/1 LED Current Response During Fast PWM Dimming Figure 2-1 TPS922050/1 LED Current Response During Fast PWM Dimming