SLVUC35A May   2021  – August 2021 TPS25946

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 EVM Features
    2. 1.2 EVM Applications
  3. 2Description
  4. 3Schematic
  5. 4General Configurations
    1. 4.1 Physical Access
    2. 4.2 Test Equipment and Set up
      1. 4.2.1 POWER SUPPLIES
      2. 4.2.2 METERS
      3. 4.2.3 OSCILLOSCOPE
      4. 4.2.4 LOADS
  6. 5Test Setup and Procedures
    1. 5.1 Hot Plug Test
    2. 5.2 Startup With a Combination of Capacitive and Resistive Loads
    3. 5.3 Power-Up into Short Test
    4. 5.4 Overvoltage Lockout Test
    5. 5.5 Transient Overload Performance
    6. 5.6 Overcurrent Test
    7. 5.7 Output Hot Short Test
    8. 5.8 USB On-The-Go (OTG) Performance
  7. 6EVAL Board Assembly Drawings and Layout Guidelines
    1. 6.1 PCB Drawings
  8. 7Bill Of Materials (BOM)
  9. 8Revision History

4.1 Physical Access

Table 4-1 lists the TPS25946EVM 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 function of the signal LED.

Table 4-1 Input and Output Connector Functionality
ConnectorLabelDescription
J1VIN (+), PGND (–)Intput Power to the eFuse
J2VOUT (+), PGND (–)Output Power from the eFuse
Table 4-2 Test Points Description
Test PointsLabelDescription

TP1

VIN

Input voltage

TP2

VOUT

Output voltage
TP3

VCC_EXT

External VCC voltage for Power Good indicator

TP4

EN/UVLO

EN/UVLO signal

TP5

OVLO

OVLO signal

TP6

ITimer

ITimer signal

TP7

dVdt

Output voltage ramp control

TP8

ILM

Current limit and monitor signal

TP9

PG

Power Good signal

TP10

PGTH

Power Good threshold signal

TP11 and TP12

PGND

Power GND signal

TP13

GND

IC GND signal
Table 4-3 Jumper Descriptions and Default Positions
JumperLabelDescription

Default Jumper Position

J3(1)

PGTH Selection for TPS259460x variants

1-2 PGTH is respect to VOUT

1-2

2-3 PGTH is respect to VIN

J4

dVdt1-2 Position sets Output Slew Rate to 0.6 mV/µs

3-4

3-4 Position sets Output Slew Rate to 0.2 mV/µs
5-6 Position sets Output Slew Rate to 0.09 mV/µs

J5

ITimer

1-2 Position sets the transient current blanking period to 183 µs

3-4

3-4 Position sets the transient current blanking period to 1.83 ms
5-6 Position sets the transient current blanking period to 18.3 ms

J6

ILM

1-2 Position sets the current limit to 0.5 A

7-8

3-4 Position sets the current limit to 2 A
5-6 Position sets the current limit to 4.5 A
7-8 Position sets the current limit to 6 A

J7

VCC Connection

1-2 Position connects external voltage, VCC_EXT as reference for PG

2-3

2-3 Position connects on board generated voltage, VCC as reference for PG
(1) In order to evaluate the performance of TPS259461x variants, the jumper J3 needs to be at 2-3 position.
Table 4-4 LED Descriptions

LED

Description

D3

When ON, indicates that PG is asserted