SLVUD36 November   2024 LM25190-Q1

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 Test Setup and Procedure
      1. 2.1.1 EVM Connections
      2. 2.1.2 Test Equipment
      3. 2.1.3 Recommended Test Setup
        1. 2.1.3.1 Input Connections
        2. 2.1.3.2 Output Connections
      4. 2.1.4 Test Procedure
        1. 2.1.4.1 Basic Test Procedure
  8. 3Implementation Results
    1. 3.1 Test Data and Performance Curves
      1. 3.1.1 Efficiency
      2. 3.1.2 Operating Waveforms
        1. 3.1.2.1 Start-Up and Shutdown With EN
        2. 3.1.2.2 Switching
        3. 3.1.2.3 Load Transient (CV), ISET Modulation (CC)
      3. 3.1.3 Thermal Performance
      4. 3.1.4 Bode Plot
      5. 3.1.5 EMI Performance
  9. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layout
    3. 4.3 Bill of Materials
  10. 5Additional Information
    1. 5.1 Trademarks
  11. 6Device and Documentation Support
    1. 6.1 Device Support
      1. 6.1.1 Development Support
    2. 6.2 Documentation Support
      1. 6.2.1 Related Documentation
        1. 6.2.1.1 PCB Layout Resources
        2. 6.2.1.2 Thermal Design Resources

2.1.1 EVM Connections

The recommended test setup is shown in Figure 2-1. Working at an ESD-protected workstation, make sure that any wrist straps, boot straps, or mats are connected and referencing the user to earth ground before handling the EVM.

LM25190QEVM-2100 EVM Test Setup Figure 2-1 EVM Test Setup
CAUTION:
LM25190QEVM-2100

Hot surface. Contact can cause burns. Do not touch.
Table 2-1 Power Connections
REF DES LABEL DESCRIPTION
J1 VIN+ Positive input voltage power connection
J1 VIN– Negative input voltage power connection
J2 VIN_EMI+ Positive input voltage power connection for EMI test
J2 VIN_EMI– Negative input voltage power connection for EMI test
J5 VOUT+ Positive output voltage power connection
J5 VOUT– Negative output voltage power connection
Table 2-2 DVM Connections
REF DES LABEL DESCRIPTION
TP1 VIN+ Positive input voltage sensing
TP2 VIN– Negative input voltage sensing
TP3 VOUT+ Positive output voltage sensing
TP4 VOUT– Negative output voltage sensing
Table 2-3 J8 Jumper
NUMBER LABEL DESCRIPTION
1 VOUT VOUT connection
2 BIAS BIAS connection. If VOUT is in the range of 10V to 28V, connect #1 to #2 for the external BIAS supply from VOUT.
3 VCC VCC connection
4 FB FB connection
5 COMP COMP connection
6 PG PGOOD connection. An open-collector output is connected to VCC through 100kΩ pullup resistor.
7 ISET ISET connection. Dynamic current setting pin for the constant current operation.
8 AGND Ground connection
9 ILIM/IMON IMON connection. Current monitor and current limit programming pin.
10 AGND Ground connection
11 EN ENABLE input. Connect #10 to #11 to disable the device.
Table 2-4 J3 Jumper
NUMBER LABEL DESCRIPTION
1 AGND Ground connection
2 FPWM/SYNC FPWM/SYNC connection. Connect #1 to #2 for PFM. Connect #2 to #3 for FPWM. Apply external clock synchronization pulse if required.
3 VCC VCC connection
Table 2-5 J4 Jumper
NUMBER LABEL DESCRIPTION
1 VCC VCC connection
2 RT Connection to RT resistor. Connect #1 to #2 during initial start-up for DRSS. Connect #2 to #3 during initial start-up for the fixed switching frequency operation.
3 AGND Ground connection
Table 2-6 J7 Jumper
NUMBER LABEL DESCRIPTION
1 VCC VCC connection
2 FB FB connection. Connect #1 to #2 for the 12V fixed output using internal feedback. Connect #2 to #3 for the 5V fixed output using internal feedback. Populate proper VOUT feedback components before using J7 jumper.
3 AGND Ground connection
Table 2-7 J6 Jumper
NUMBER LABEL DESCRIPTION
1 TRIM Apply an external voltage to change the output regulation target dynamically. Populate proper VOUT feedback components before using J6 jumper.
2 BODE– 50Ω injection point for CV loop response measurement. Connected to feedback resistor.
3 BODE+ 50Ω injection point for CV loop response measurement. Connected to output capacitor.