SLUUCU2A March   2023  – September 2023 UCC14130-Q1 , UCC14131-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 U1 Component Selection
    2. 1.2 Pin Configuration and Functions
  5. 2Description
    1. 2.1 EVM Electrical Performance Specifications
  6. 3Schematic
  7. 4EVM Setup and Operation
    1. 4.1 Recommended Test Equipment
    2. 4.2 External Connections for Easy Evaluation
    3. 4.3 Powering the EVM
      1. 4.3.1 Power on for Start-up
      2. 4.3.2 Power off for Shutdown
    4. 4.4 EVM Test Points
    5. 4.5 Probing the EVM
  8. 5Performance Data
    1. 5.1  Efficiency Data
    2. 5.2  Regulation Data
    3. 5.3  Steady State Input Current
    4. 5.4  Start-Up Waveforms
    5. 5.5  Inrush Current
    6. 5.6  AC Ripple Voltage
    7. 5.7  EN and Timing
    8. 5.8  RLIM
    9. 5.9  Shutdown
    10. 5.10 Thermal Performance
  9. 6Assembly and Printed Circuit Board (PCB) Layers
  10. 7Bill of Materials (BOM)
  11. 8Revision History

4.5 Probing the EVM

Using TP3 ([+5V]), TP6 ([+12V]) and TP9 (VIN) oscilloscope probe PCB test points (see Figure 4-1 and Figure 4-2), the UCC14131-Q1 is a high frequency DC-DC module that requires careful measurement for accurately capturing transient events and measuring high frequency, AC ripple voltage. Remove the witch hat probe tip cover and ground lead from the scope probe. If scope probe ground springs are not available, wrap a piece of 22 AWG bare wire around the scope probe ground ring or use a fitted ground spring and insert the probe tip and ground into the EVM as shown in Figure 4-2.


GUID-C05E2AAC-50C6-4EF5-8F6F-85142D2F72A0-low.png

Figure 4-2 UCC14131EVM-070, PCB Scope Probe Test Points

The EVM output nomenclature (VDD, VEE) corresponds to what is commonly used when referring to isolated gate driver ICs for [+12V] and GNDS of this evaluation board. As shown in Figure 4-2, [+5V](TP4) is the [+5V] output (ref Table 4-1). When the UCC14131-Q1 is used to bias a gate driver IC, [+12V] (VDD to VEE) and [+5V] (capacitor-middle to VEE) are referred to with respect to VEE (= GNDS). When testing the EVM as a stand-alone bias power supply, oscilloscope probing of the secondary-side outputs are limited to [+5V](TP3) and [+12V](TP6), which are referenced to VEE or GNDS.