SLVUD40 November   2024 TPS25984B

 

  1.   1
  2.   TPS25984BEVM: Evaluation Module for TPS25984B eFuse
  3.   Trademarks
  4. 1Introduction
    1. 1.1 EVM Features
    2. 1.2 EVM Applications
  5. 2Description
  6. 3Schematic
  7. 4General Configurations
    1. 4.1 Physical Access
    2. 4.2 Test Equipment
      1. 4.2.1 Power Supplies
      2. 4.2.2 Meters
      3. 4.2.3 Oscilloscope
      4. 4.2.4 Loads
  8. 5Test Setup and Procedures
    1. 5.1  Hot Plug
    2. 5.2  Start-Up With Enable
    3. 5.3  Difference Between Current Limit and DVDT Based Start-Up Mechanisms
    4. 5.4  Power Up Into Short
    5. 5.5  Overvoltage Lockout
    6. 5.6  Transient Overload Performance
    7. 5.7  Overcurrent Event
    8. 5.8  Output Hot Short
    9. 5.9  Quick Output Discharge (QOD)
    10. 5.10 Thermal Performance of TPS25984BEVM
  9. 6EVAL Board Assembly Drawings and Layout Guidelines
    1. 6.1 PCB Drawings
  10. 7Bill of Materials (BOM)

4.1 Physical Access

Table 4-1 lists the TPS25984BEVM eFuse Evaluation Board input and output connectors functionalities. Table 4-2 and Table 4-3 describe the availability of test points and the functionalities of the jumpers. Table 4-4 presents the functions of the signal LEDs.

Table 4-1 Input and Output Connector Functionality
ConnectorLabelDescription
T1VIN (+)Positive terminal for the input power to the EVM
T2VOUT (+)Positive terminal for the output power from the EVM

T3

PGND (–)Negative terminal for the EVM (Common for both input and output)
Table 4-2 Test Points Description
Test PointsLabelDescription

TP1

S1_P

Kelvin sensing points to measure on-resistance: Primary Device (U1)

TP2S1_N

TP3

S2_P

Kelvin sensing points to measure on-resistance: Secondary Device (U2)

TP4

S2_N

TP5

VIN

Input Voltage

TP6

VOUT

Output Voltage

TP7

MODE2

MODE selection: Secondary Device

TP8

FLTb2

Open-drain active low fault indication: Primary Device

TP9

NC/Vinf

Pin 7 from Primary Device

TP10

FLTb

Open-drain active low fault indication: Primary Device

TP11

D_OC

Open-drain signal to indicate and control power switch ON and OFF status

TP12

TEMP

Maximum device die temperature monitor analog voltage output with two (2) TPS25984B eFuses in parallel

TP13

DVDT

Start-up output slew rate control

TP14

VREG

Internal LDO output from Primary device

TP15

IMON

Load current monitor and overcurrent and fast-trip thresholds during steady state

TP16

ILIM2

Current limit and fast-trip threshold during start-up: Secondary Device

TP17

ILIM

Current limit and fast-trip threshold during start-up: Primary Device

TP18

IREF

Reference voltage for overcurrent and short-circuit protections, and active current sharing blocks

TP19

MODE

MODE selection: Primary Device

TP20

PG

Open-drain active high power good indication

TP21

VREG2

Internal

LDO output from Secondary device

TP22

EN

Active high enable input

TP23

NC/Vinf2

Pin 7 from Secondary Device

TP24

VDD PULLUP

5V pullup power supply generated using a LDO from VIN

TP25

VCC EXTERNAL

External pullup power supply

TP26

GD EXTERNAL

External gate signal for custom load transient

TP27

PGND

Supply Ground

QGND1

QGND

Device Ground

G1

QGND

G2

QGND

Table 4-3 Jumper Descriptions and Default Positions
JumperLabelDescription

Default Jumper Position

J1

D_OC

1-2 Position: The D_OC pull-up supply is generated from VIN using a LDO

Through a 100kΩ resistor

1-2

2-3 Position: The D_OC pin is connected to the VREG (internal LDO from the device) of the Primary Device through a 100kΩ resistor

J2

DVDT

1-2 Position sets the output slew rate to 1.8V/ms

5-6

3-4 Position sets the output slew rate to 12V/ms
5-6 Position sets the output slew rate to 1.2V/ms

J4

IMON

1-2 Position sets the VIMON to 1V at 110A

1-2

3-4 Positionsets the VIMON to 1V at 75A

J5

ILIM

1-2 Position sets the inrush current limit to 29A and the active current sharing threshold to 55A with VIREF of 1V: Primary Device

1-2

3-4 Position sets the inrush current limit to 20A and the active current sharing threshold to 38A with VIREF of 1V: Primary Device

J6

IREF

1-2 Position sets the reference voltage for overcurrent and short-circuit protection blocks to 1V when testing with two devices or 0.5V when only testing with Primary device

3-4

3-4 Position sets the reference voltage for overcurrent and short-circuit protection blocks to 2V when testing with two devices or 1V when only testing with Primary device

J7

ILIM2

1-2 Position sets the inrush current limit to 29A and the active current sharing threshold to 55A with VIREF of 1V: Secondary Device

1-2

3-4 Position sets the inrush current limit to 20A and the active current sharing threshold to 38A with VIREF of 1V: Secondary Device

J8

VDD PULL-UP POWER SUPPLY

1-2 Position provides the VDD pull-up supply from the external power source

2-3

2-3 Position provides the VDD pull-up supply from the onboard 12V to 5V LDO

J9

EXTERNAL GATE SIGNAL1-2 Position provides the GATE signal to the MOSFETs (Q4 – Q6) from the onboard mono-shot

1-2

2-3 Position provides the GATE signal to the MOSFETs (Q4 – Q6) from the external signal generator
Table 4-4 LED Descriptions

LED

Description

DG1

When ON, indicates that PG is asserted

DR1

When ON, indicates that FLTb is asserted

DR2

When ON, indicates that FLTb2 is asserted