SNVU809 February   2022 LMQ66430 , LMQ66430-Q1

 

  1.   Trademarks
  2. 1Setup
    1. 1.1 Test Points
    2. 1.2 Jumpers
  3. 2Operation
    1. 2.1 Quick Start
  4. 3Schematic
  5. 4Board Layout
  6. 5Bill of Materials
  7. 6Test Results
    1. 6.1 LMQ66430-2EVM Test Results
      1. 6.1.1 Efficiency and Load Regulation
      2. 6.1.2 Load Transients
      3. 6.1.3 Output Ripple and Thermal Picture

1.1 Test Points

The test points on the board can be used to connect to the input of a power supply and output load for the EVM. See Figure 1-1 for typical test setup. The functions of the test point connections are:

  • Vin_EMI — Input supply to EVM including an EMI filter. Connect to a suitable input supply. Connect at this point for EMI tests.
  • GND_EMI — Ground connection for the input supply
  • Vin — Input supply to the IC. Can be connected to a digital multimeter to measure the input voltage after EMI filter.
  • VOUT — Output voltage test point of EVM. Can be connected to a desired load.
  • GND — Ground test points
  • PG — This test point is connected to the PGOOD pin from the IC. Can be tied to an external supply through a pullup resistor or left open.
  • SYNC — In a MODE/SYNC trim part, this test point is connected to the SYNC pin of the IC. This test point can also be connected to an external clock to synchronize the IC. Make sure the RT resistor is not installed when applying a synchronous clock input. If RMOD is installed, JMODE/SYNC jumper must not short pin 2 to either adjacent pins while applying a synchronous clock input. For evaluating RT trim parts, see the JMODE/SYNC jumper description in Section 1.2.
  • Vcc — This test point is connected to the Vcc pin of the IC.
  • AGND— This test point represents the analog ground test point and is connected to the ground plane.
Figure 1-1 EVM Board Connections