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

5.1 Overload Protection Test

Use the following instructions to evaluate current limit behavior of the TPS26610 (U1):

  1. Set the jumper setting J4 in 2–3 position to set MODE = 180 kΩ
  2. Install jumper J6 in 1-2 position to connect 49.9 Ω as burden resistor
  3. Set dual polarity regulated power supply to +15 V : 0 V : –15 V and apply the power at connector J2
  4. Apply a voltage of 1.6 V at I_IN_1 and then step-up to 8 V to emulate overload situation on TPS26610
  5. The device limits the current to 60 mA for approximately 50 ms and after that the current is limited to 30 mA for approximately 100-ms time and then auto retries for every 1.6 s
  6. Step-down the voltage at I_IN_1 to 1.6 V to remove the overload fault

Figure 5-2 and Figure 5-3 show current limit behavior captured on the TPS2661EVM eFuse Evaluation Board. Figure 5-4 shows device response during recovery from overload fault.

GUID-20201015-CA0I-5LNP-JJ7C-G2KXDKP4HVH2-low.png Figure 5-2 Current Limit Behavior of TPS26610 for IOUT > 2 × IOLWith MODE = 180 kΩ
GUID-20201015-CA0I-WMDB-XW59-WFRX83TLR0Z2-low.png Figure 5-3 Current Limit Behavior of TPS26610 for IOUT > 2 × IOL With MODE = 180 kΩ (Zoomed)
GUID-20201015-CA0I-ZFVD-ZSCZ-TH36QVGVPZQ8-low.png Figure 5-4 TPS26610 Response During Recovery From Overload Fault