TIDT329 june   2023

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Considerations
    3. 1.3 Dimensions
  6. 2Testing and Results
    1. 2.1 Efficiency Graph
    2. 2.2 Efficiency Data
    3. 2.3 Bode Plots
  7. 3Waveforms
    1. 3.1 Switching
      1. 3.1.1 2.7-V Input Voltage
      2. 3.1.2 2.1-V Input Voltage
      3. 3.1.3 1.5-V Input Voltage
    2. 3.2 Output Voltage Ripple
    3. 3.3 Load Transients
      1. 3.3.1 0.2-A to 2.2-A Load Transient
      2. 3.3.2 2-A to 4.5-A Load Transient
    4. 3.4 Start-Up Sequence

Description

This reference design uses the LM5155-Q1 boost controller to supply an 8-V, 4.5-A load and has been optimized to operate from a single-cell supercapacitor at the input. The converter can discharge a supercapacitor as low as 1.5 V to leverage as much as possible of the stored energy to open a car door in an emergency situation, where the KL30 car battery voltage is not present anymore.