SLVUBX0A July   2021  – January 2022 TPSM8A28 , TPSM8A29

 

  1.   Trademarks
  2. 1Introduction
  3. 2Description
  4. 3Getting Started With the TPSM8A29EVM
    1. 3.1 J1 - Input Voltage Supply Connector
    2. 3.2 J4 and J7 - Positive and Negative Output Connectors
    3. 3.3 J2 - Enable Header
    4. 3.4 J5 - Switching Frequency and Operating Mode
    5. 3.5 J6 - Output Voltage Selection Header
  5. 4Test Point Description
    1. 4.1 TP12 - SS/REF_IN
    2. 4.2 TP14 - VCC
  6. 5Test Setup and Results
    1. 5.1 Startup Procedure
    2. 5.2 Efficiency
    3. 5.3 Load Regulation
    4. 5.4 Line Regulation
    5. 5.5 Output Voltage Ripple
    6. 5.6 Startup and Shutdown
    7. 5.7 Load Transient
    8. 5.8 Bode Plot
  7. 6TPSM8A29EVM Schematic
  8. 7TPSM8A29EVM PCB Layers
  9. 8TPSM8A29EVM Bill of Materials
  10. 9Revision History

4 Test Point Description

This section explains the test points found on the TPSM8A29EVM, as well as how to use them. Test points that may benefit from further explanation are addressed after Table 4-1.

Table 4-1 Description of Test Points
Test Point Function Description
TP1 PGND Connection to PGND
TP2 VIN_SNS- Negative side of input voltage sensing point, connected to PGND
TP4 VIN_SNS+ Positive side of input voltage sensing point, connected to VIN
TP5 EN Enable pin of TPSM8A29 - can be used to monitor the EN voltage, or can be used to connect external EN signal, max 5.5 V. See Section 3.3
TP7 PGND Connection to PGND
TP11 AGND Connection to AGND - reference point for TRIP and MODE resistors. AGND connected to PGND through single point, NT1, on bottom of EVM
TP12 SS/REF_IN Soft-start and reference voltage tracking, max 1.5 V. See Section 4.1
TP13 PGOOD Open-drain power good status signal. Pulled up to VCC when voltage on FB pin is within limits of correct operation
TP14 VCC Monitor internal LDO voltage or override internal LDO with external bias for improved efficiency. See Section 4.2
TP15 VSNS- Negative return signal for remote sensing applications, connected to PGND through cuttable jumper net tie NT1 by default.
TP16 BODE-/VSNS+ Negative connection point for Bode measurements, connected to VOUT
TP17 BODE+ Positive connection point for Bode measurements
TP18 VOUT_SNS+ Positive sense point for VOUT measurements. Do not use to connect to load
TP19 VOUT_SNS- Negative sense point for VOUT measurements. Do not use to connect to load
TP21 PGND Connection to PGND