SLVUBW7 May   2020

 

  1.   TPS7H4001QEVM-CVAL Evaluation Module User's Guide
    1.     Trademarks
    2. 1 TPS7H4001QEVM-CVAL Overview
      1. 1.1 Features
      2. 1.2 Applications
    3. 2 TPS7H4001QEVM-CVAL Default Configuration
    4. 3 TPS7H4001QEVM-CVAL Initial Setup
    5. 4 TPS7H4001QEVM-CVAL Testing
      1. 4.1 Output Voltage Regulation
      2. 4.2 Quadrature Phases
      3. 4.3 Output Voltage Ripple
      4. 4.4 Soft Startup
      5. 4.5 Transient Response to Positive/Negative Load Step (27 A to 67 A to 27 A)
      6. 4.6 Loop Frequency Response
      7. 4.7 Efficiency
      8. 4.8 Current Limiting
      9. 4.9 Current Sharing
    6. 5 TPS7H4001QEVM-CVAL EVM Schematic
    7. 6 TPS7H4001QEVM-CVAL Bill of Materials (BOM)
    8. 7 Board Layout
    9. 8 Appendix A

3 TPS7H4001QEVM-CVAL Initial Setup

This section provides the test instruments required and the connections to the EVM as shown in Figure 2.

  1. Remove Jumper J9 so that enable pins to all devices is no longer grounded.
  2. Input DC power supply
    1. Set for 5-V DC, 30-A current limit
    2. Connect positive output of DC supply to pin 1 of connector J2 (PVIN) and negative terminal of supply to pin 2 of connector J2 for ground using 16 AWG wire or larger. [Note: For more precise measurements, eliminating the IR voltage drop in the input cables is achieved by using a power supply source with sensing ports and connecting between TP4 to PVIN and TP18 to GND.]
  3. DC electronic load
    1. Connect positive DC input of e-load to pin 2 of connector J4 (VOUT) using 16 AWG wire.
    2. Connect negative DC input of e-load to pin 1 of connector J4 (VOUT) using 16 AWG wire.
    3. Connect voltage monitoring sensing ports of e-load across test points TP15 (VOUT1) and TP20 (GND). A voltage meter can be used to monitor this voltage also.
  4. Oscilloscope
    1. CH1 - Connect voltage scope probe to scope probe test point J6 (PH1) to monitor the phase node. DC coupled, Full BW, 2 V/div, Rising Edge Trigger at 0.5 V.
    2. CH2 - Connect voltage scope probe to scope probe test point J13 (PH2) to monitor the phase node. DC coupled, Full BW, 2 V/div, Rising Edge Trigger at 0.5 V.
    3. CH3 - Connect voltage scope probe to scope probe test point J12 (PH3) to monitor the phase node. DC coupled, Full BW, 2 V/div, Rising Edge Trigger at 0.5 V.
    4. CH4 - Connect voltage scope probe to scope probe test point J10 (PH4) to monitor the phase node. DC coupled, Full BW, 2 V/div, Rising Edge Trigger at 0.5 V.
TPS7H4001QEVM-CVAL Setup.pngFigure 2. TPS7H4001QEVM-CVAL Initial Setup

Table 2. Summary of Connections

Reference Designator Silkscreen Function
J2 PVIN Input power: pin 1 = 5 V, pin 2 = GND (Vsupply)
J4 VOUT Output voltage: pin 1 = GND, pin 2 = Vout ≈1 V (e-load)
J6 PH1 Phase switching node scope probe test point (Scope CH-1)
J13 PH2 Phase switching node scope probe test point (Scope CH-2)
J12 PH3 Phase switching node scope probe test point (Scope CH-3)
J10 PH4 Phase switching node scope probe test point (Scope CH-4)
TP15 VOUT1 VOUT1 test point (e-load monitor)
TP4 PVIN PVIN test point (Vsupply_sense)
TP17, TP18 GND GND test points (Vsupply_sense, e-load monitor)