SLVUBX8B October   2020  – December 2021 TPS2661

 

  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 Setup
      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 Overload Protection Test
    2. 5.2 Output Short-Circuit Test
    3. 5.3 Input Undervoltage Protection Test
    4. 5.4 Output Undervoltage Protection Test
    5. 5.5 Output Overvoltage Protection Test
    6. 5.6 TPS26612 Overload Protection Test
    7. 5.7 Current Limiting for VIN < –Vs
    8. 5.8 Surge Protection Test (Current Input, CH1)
    9. 5.9 Surge Protection Test (Analog Output, CH2)
  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 TPS2661EVM evaluation board input and output connector functionality. Table 4-2 and Table 4-3 describe the test point availability and the jumper functionality.

Table 4-1 Input and Output Connector Functionality
ConnectorChannelLabelDescription
J1CH1I_IN_1, AGND_1CH1 - Signal input connector
J3CH1I_OUT_1, AGND_1CH1 - Signal output connector

J2

CH1

+VS1, AGND_1, -VS1

CH1 - Supply for powering the device

J13CH2I_IN_2, AGND_2CH2 - Signal input connector
J9CH2I_OUT_2, AGND_2CH2 - Signal output connector

J8

CH2

+VS2, AGND_2, -VS2CH2 - Supply for powering the device
Table 4-2 Test Points Description
Test Points Label Description
TP1 +VS1 Positive supply for U1
TP2 SGOODb_1 Signal good indicator for CH1
TP3 I_OUT_1 Signal output for CH1
TP4 I_IN_1 Signal input for CH1
TP5 -VS1 Negative supply for U1
TP6 EN_1 Enable control for CH1
TP7, TP8 AGND_1 Reference ground for CH1

TP9

 +VS2 Positive supply for U3
TP10 SGOODb_2 Signal good indicator for CH2
TP11 I_OUT_2 Signal output for CH2

TP12, TP13

 AGND_2 Reference ground for CH2
TP14 EN_2 Enable control for CH2
TP15 -VS2 Negative supply for U3

TP16

 I_IN_2 Signal input for CH2
Table 4-3 Jumper and LED Descriptions
JumperLabelDescription
J4, J10MODEOverload Response Setting
Leaving J4 OPEN sets MODE = OPEN
1–2 Position connects MODE pin to GND
2–3 Position connects 180 kΩ from MODE pin to GND
J5, J11ENEN has internal pullup and it can be left floating to enable the device
Pull EN low to turn off the device

J6

R_burden

Jumper to select burden resistor
1–2 Position connects 49.9 Ω as burden resistor
3–4 Position connects 100 Ω as burden resistor
5–6 Position connects 249 Ω as burden resistor
Leave J6 OPEN to connect load externally

J7–VS1Install to use U1 in single supply configuration

J12

–VS2Install to use U3 in single supply configuration

J14

Feedback selection jumper

Jumper to select the feedback point
1–2 Position does not compensation the voltage drop in the eFuse
2–3 Position compensates the voltage drop in the eFuse

J15

Feedback gain selection

Jumper to select the feedback gain
1–2 Position sets gain of 4
2–3 Position sets gain of 2.5

J16, J18

Bias resistors

Install to connect bias resistors on the signal lines

J17, J19

AGND_1

Install to connect signal return to the ground

J20

—

Install to configure the device U3 as power supply protection for 2-wire transmitter