TIDT199A January   2021  – December 2022

 

  1.   Description
  2.   Features
  3.   Applications
  4. 1Input Characteristics
    1. 1.1 DC Input Voltage Requirements
  5. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Standby Power
    3. 2.3 Regulation
    4. 2.4 Current Limit
    5. 2.5 Thermal Images
    6. 2.6 Bode Plots
  6. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Output Voltage Ripple
    3. 3.3 Load Transients
    4. 3.4 Dynamic Response

Description

This reference design is a USB Type-C® dual-output buck with 65-W output power and 98.8% efficiency. The design uses two LM61460 buck converters to step down a 21-V input and includes the option for a 5-V bias voltage input to maximize efficiency. The USB Type-C design offers dual-output voltages of 5 V, 9 V, 15 V, and 20 V and was tested using the PMP22426 daughter card. The PMP22426 uses the TPS25740B, a USB Type-C Power Delivery (PD) controller, to control each output separately.