SLVUCH6A July   2023  – November 2023 TPS25984

 

  1.   1
  2.   TPS25984EVM: Evaluation Module for TPS25984 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  Provision to Apply Load Transient and Overcurrent Event Using an Onboard Switching Circuit
    9. 5.9  Output Hot Short
    10. 5.10 Quick Output Discharge (QOD)
    11. 5.11 Thermal Performance of TPS25984EVM
  9. 6EVAL Board Assembly Drawings and Layout Guidelines
    1. 6.1 PCB Drawings
  10. 7Bill of Materials (BOM)
  11. 8Revision History

4.1 Physical Access

4 lists the TPS25984EVM eFuse Evaluation Board input and output connectors functionalities. Table 4-2 and 6 describe the availability of test points and the functionalities of the jumpers. 5 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

VDD-PRI

Controller input power: Primary Device

TP10

FLTb

Open-drain active low fault indication: Primary Device

TP11

SWEN

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) TPS25984 eFuses in parallel

TP13

DVDT

Start-up output slew rate control

TP14

ITIMER

Overcurrent blanking timer: 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

ITIMER2

Overcurrent blanking timer: Secondary Device

TP22

EN

Active high enable input

TP23

VDD-SEC

Controller input power: Secondary Device

TP24

VDD PULLUP

5 V 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

SWEN

1-2 Position: The SWEN pull-up supply is generated from VIN using a Zener diode (RZ2 populated and RZ3 depopulated) or using a LDO (RZ2 depopulated and RZ3 populated)

1-2

2-3 Position: The SWEN pin is connected to the ITIMER pin of the Primary Device through a 100-kΩ resistor

J2

DVDT

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

5-6

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

J3

ITIMER

1-2 Position sets the overcurrent blanking timer to 1.4-ms

3-4

3-4 Position sets the overcurrent blanking timer to 14-ms

J4

IMON

1-2 Position sets the circuit breaker threshold to 120-A with VIREF of 1-V

1-2

3-4 Position sets the circuit breaker threshold to 70-A with VIREF of 1-V

J5

ILIM

1-2 Position sets the inrush current limit to 38-A and the active current sharing threshold to 59-A with VIREF of 1-V: Primary Device

1-2

3-4 Position sets the inrush current limit to 22-A and the active current sharing threshold to 35-A with VIREF of 1-V: Primary Device

J6

IREF

1-2 Position sets the reference voltage for overcurrent, short-circuit protection, and active current sharing blocks to 0.8-V

3-4

3-4 Position sets the reference voltage for overcurrent, short-circuit protection, and active current sharing blocks to 1-V

J7

ILIM2

1-2 Position sets the inrush current limit to 38-A and the active current sharing threshold to 59-A with VIREF of 1-V: Secondary Device

1-2

3-4 Position sets the inrush current limit to 22-A and the active current sharing threshold to 35-A with VIREF of 1-V: 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 12-V to 5-V 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