SLUAAN5 February   2023 TPS61376

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
  4. 2TPS61376 in Barcode Scanner Application
  5. 3TPS61376 Features
    1. 3.1 Inrush Current Control During Start-up
    2. 3.2 Input Average Current Limit During Load Transient
    3. 3.3 True Load Disconnect During Shutdown
  6. 4References

3.1 Inrush Current Control During Start-up

#GUID-E171594C-35F1-4F0C-891C-ED87A271373E shows the startup waveform with an average input current limit set to 500 mA.

TPS61376 has the soft-start and input average current limit function to prevent high inrush current during startup. During start-up when Vin is higher than Vout, the ISO FET between VP and SW pin will limit the current across the inductor. This current will increase linearly as the Vin and Vout delta decreases. When Vout is higher than Vin, TPS61376 will regulate the input average current programmed through ILIM pin.

Figure 3-2 Start-up with 500 mA Avarage Input Current Limit