SLUUCB4 June   2020 TPS25980

 

  1.   TPS25980EVM: Evaluation Module for TPS25980x efuse
    1.     Trademarks
    2. 1 Introduction
      1. 1.1 EVM Features
      2. 1.2 EVM Applications
    3. 2 Description
    4. 3 Schematic
    5. 4 General 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. 5 Test Setup and Procedures
      1. 5.1 Hot-Plug Test
      2. 5.2 Current Limit Test
      3. 5.3 Output Hot-Short Test
      4. 5.4 Wakeup into Short Test
      5. 5.5 Overvoltage Cut-off Test
    7. 6 EVAL Board Assembly Drawings and Layout Guidelines
      1. 6.1 PCB Drawings
    8. 7 Bill Of Materials (BoM)

4.1 Physical Access

Table 2 lists the TPS25980EVM eFuse Evaluation Board input and output connector functionality. Table 3 and Table 4 describe the test point availability and the jumper functionality. Table 5 describes the auto-retries and retry-delay settings.

Table 2. Input and Output Connector Functionality

Connector Label Description
J1 VIN Power input connector to the positive rail of the input power supply
J3 PGND Ground connection for the power supply
J2 VOUT Power output connector to the positive side of the load
J5 PGND Ground connection for the load

Table 3. Test Points Description

Test Points Label Description
TP1 VIN Input power supply to the EVM
TP2 VOUT Output from the EVM
TP3 EN/UVP Active high enable and undervoltage input
TP4 VCC_EXT External power supply input for Power Good pullup
TP5 PG Power Good test point
TP6 LDSTRT Load handshake signal input point
TP7 PGND System ground
TP8 GND GND(IC GND)
TP9 GND GND(IC GND)
TP10 GND GND(IC GND)
TP11 ITIMER Fault timer voltage
TP12 ILIM Sets current limit threshold
TP13 RETRY_DLY Sets retry delay time
TP14 DVDT Output voltage ramp control
TP15 IMON Load current monitor

Table 4. Jumper and LED Descriptions

Jumper Label Description
J4 NRETRY NRETRY setting number of auto-retries. Please refer Table 5 for details
1-2 Position shorts to ground
3-4 Position sets 68 nF
J6 IMON Current scale setting
1-2 Position sets 0.13 V/A
3-4 Position sets 0.25 V/A
J7 PG Pull-Up PG Pull-Up voltage setting
1-2 Position sets external source “VCC_EXT”
3-4 Position sets 3.3 V
J8 LDSTRT LDSTRT setting
Install J8 to disable the LDSTRT function
OPEN J8 to feed LDSTRT signal externally
J9 ITIMER ITIMER setting (sets delay before entering into current limit)
OPEN sets ‘0’sec delay
1-2 Position sets 200 µs delay
3-4 Position sets 2 ms delay
5-6 Position sets 20 ms delay
J10 ILIM Current Limit Setting
OPEN disables the device
1-2 Position sets Rilim to short and disables the device
3-4 Position sets 3 A
5-6 Position sets 5 A
7-8 Position sets 8 A
J11 RETRY_DLY Retry delay setting
OPEN sets 200 µs
1-2 Position sets “NO auto-retry” (latches OFF the device)
3-4 Position sets 1 s retry delay
5-6 Position sets 50 ms retry delay
J12 DVDT Output voltage slew rate setting
1-2 Position sets 1.5 V/ms
3-4 Position sets 0.5 V/ms
D3
(GREEN – LED) 		D3 Power good indicator. LED turns on when the internal FET fully turns ON

Table 5. Auto-retries and Retry Delay Settings

RETRY_DLY
(J11 Position)		 Retry Delay NRETRY
(J4 Position)		 Number of Auto-Retries
OPEN 200 µs OPEN 4
1-2 Infinite
2-3 16
1-2 Position Latches OFF X 0
3-4 Position 1 s OPEN 4
1-2 Infinite
2-3 16
5-6 Position 50 ms OPEN 4
1-2 Infinite
2-3 64