SLVUCE5A April   2022  – June 2022

 

  1.   TPS25981EVM: Evaluation Module for TPS25981 eFuse
  2.   Trademarks
  3. 1Introduction
    1. 1.1 EVM Features
    2. 1.2 EVM Applications
  4. 2Description
  5. 3Schematic
  6. 4General Configurations
    1. 4.1 Physical Access
    2. 4.2 Test Equipment and Setup
      1. 4.2.1 Power Supplies
      2. 4.2.2 Meters
      3. 4.2.3 Oscilloscope
      4. 4.2.4 Loads
  7. 5Test Setup and Procedures
    1. 5.1 Hot-Plug Test
    2. 5.2 Overcurrent Test
    3. 5.3 Output Hot-Short Test
    4. 5.4 Wakeup into Short Test
    5. 5.5 Overvoltage Test
  8. 6EVAL Board Assembly Drawings and Layout Guidelines
    1. 6.1 PCB Drawings
  9. 7Bill Of Materials (BoM)
  10. 8Revision History

4.1 Physical Access

Table 4-1 lists the TPS25981EVM eFuse Evaluation Board input and output connector functionality. Table 4-2 and Table 4-3 describe the test point availability and the jumper functionality. Table 4-4 describes the function of signal LEDs.

Table 4-1 Input and Output Connector Functionality

Channel

ConnectorLabelDescription
CH1J9VIN1(+), PGND(–)Input of CH1
J14VOUT1(+), PGND(–)Output of CH1
Table 4-2 Test Points Description

Channel

Test PointsLabelDescription

CH1

TP26

VIN1

CH1 input voltage

TP30

VOUT1

CH1 output voltage

TP24

EN/UVLO1CH1 EN/UVLO signal

TP25

OVLO1CH1 OVLO signal

TP18

ITIMER1CH1 ITIMER signal

TP16

dVdt1CH1 output voltage ramp control

TP17

ILM1CH1 current limit and monitor signal

TP22

FLTb1

CH1 fault signal

TP23

PG1

CH1 Power Good signal

TP21

VCC_EXT1

CH1 external VCC voltage point for U8 LDO

TP15

GND1

CH1 IC GND signal

TP14,TP19

PGND1

CH1 power GND signal
Table 4-3 Jumper Descriptions and Default Positions

Channel

JumperLabelDescription

Default Jumper Position

CH1

J13

VCC connection2-3 position connects onboard generated voltage, VCC as reference for digital signals of U1

2-3

J15

dVdt1

1-2 position sets the output slew rate to 1 mV/us

3-4

3-4 position sets the output slew rate to 0.33 mV/us
5-6 position sets the output slew rate to 0.15 mV/us

J12

ILM1

1-2 position sets the current limit to 1.5 A

7-8

3-4 position sets the current limit to 4.5 A
5-6 position sets the current limit to 8 A
7-8 position sets the current limit to 11 A

J10

ITIMER1

1-2 position sets the transient current blanking period to 170 us

3-4

3-4 position sets the transient current blanking period to 1.7 ms
5-6 position sets the transient current blanking period to 17 ms

J1

OVLO1

1-2 position sets input OVLO threshold at 3.77 V

5-6

3-4 position sets input OVLO threshold at 5.67 V

5-6 position sets input OVLO threshold at 13.76 V

Table 4-4 LED Descriptions

LED

Description

D3

 When ON, indicates that PG is asserted for channel 1

D13

 When ON, indicates that FLTb is asserted for channel 1