TIDUC65 April   2022 TPSI3050 , TPSI3050-Q1 , TPSI3052 , TPSI3052-Q1

 

  1.   Description
  2.   Resources
  3.   Features
  4.   Applications
  5.   5
  6. 1System Description
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Highlighted Products
    3. 2.3 Design Considerations
      1. 2.3.1 Overcurrent Protection (OCP)
        1. 2.3.1.1 Immediate Overcurrent Protection
        2. 2.3.1.2 Adjustable Delay Overcurrent Protection
      2. 2.3.2 Overtemperature Protection (OTP)
        1. 2.3.2.1 TMP392
        2. 2.3.2.2 ISO7310
  8. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Test Setup
    3. 3.3 Test Results
  9. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
      3. 4.1.3 Altium Project
      4. 4.1.4 Assembly Drawings
      5. 4.1.5 Gerber Files
    2. 4.2 Documentation Support
    3. 4.3 Support Resources
    4. 4.4 Trademarks
  10. 5About the Author

3.2 Test Setup

To test the overcurrent protection reference design it is recommended to connect an oscilloscope to EN (enable), OC Event (output of the isolated comparator AMC23C14), and a differential probe to the AC source. Connect a 5 V power source and ensure that the TPSI3050-Q1 has powered up by measuring VDDH (10 V) and VDDM (5 V). Finally, connect the AC or DC source and the load to test the design.

To test the overtemperature protection reference design it is recommended to connect an oscilloscope to EN (enable), OT Event (output of the digital isolator), and a differential probe to the AC source. Connect a 5 V power source and ensure that the TPSI3050-Q1 has powered up by measuring VDDH (10 V) and VDDM (5 V). Finally, connect the AC or DC source and the load to tests the design.

The circuit should look as Figure 3-1.

Table 3-1 Test Points and Connectors
NameDescription
J1, J6, TP2, TP19SW1AC/DC source connection
J2, J7USER_INPUTExternal signal to control TPSI3050-Q1 EN signal
VDDPPower supply for primary side
VSSPGround supply for primary side
J3, J9Power transfer selection
J4, J10, TP9, TP28SW2Load connection
J5USER_INPUTExternal signal to control TPSI3050-Q1 EN signal without overtemperature protection
ENTPSI3050-Q1 Active high driver enable
OTP_ENOvertemperature enable signal to control TPSI3050-Q1
J11USER_INPUTExternal signal to control TPSI3050-Q1 EN signal without overcurrent protection
ENTPSI3050-Q1 Active high driver enable
OCP_ENOvercurrent enable signal to control TPSI3050-Q1
TP1, TP18VDDPTPSI3050-Q1 Power supply for primary side
TP3, TP20VDRVTPSI3050-Q1 Active high driver output
TP4, TP21VGGate voltage of the power switches
TP5, TP22ENTPSI3050-Q1 Active high driver enable
TP6, TP23VDDHTPSI3050-Q1 Generated high supply
TP7, TP24PXFRTPSI3050-Q1 Increase or decrease power transfer
TP8, TP25VDDMTPSI3050-Q1 Generated mid supply
J8, TP10, TP11, TP26, TP27VSSSGround supply for secondary side
TP12, TP13, TP29, TP30VSSPGround supply for primary side
TP14SETBTemperature sensor debug input
TP15OT_EVENTActive high signal that is pull down when overtemperature event above 90 °C occurs.
TP16OUTAOutput of the temperature sensor
TP17SETATemperature sensor debug input
TP31OC_EVENTActive high signal that is pull down when overcurrent event above 2 A occurs.

Steps to Test the Reference Design:

  1. J3/J9 Connector should be connecting R3 (20 kΩ). This allows for the highest power transfer.
  2. J5/J11 Connector should be connecting OTP_EN/OCP_EN to EN. This allows the TPSI3050-Q1 to be controlled by the overtemperature/overcurrent detection logic.
  3. Connect 5-V supply to VDDP.
  4. Check that VDDM and VDDH rails are 5-V and 10-V respectively.
  5. Connect DC source with a load.
  6. Connect 5-V supply to USER_INPUT
GUID-20220406-SS0I-HHT6-3DFV-W0STVXX8BLXP-low.pngFigure 3-1 Test Setup