SLVSFE3C November   2020  – December 2021 TPS2661

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Overload Protection and Fast-Trip
      2. 8.3.2 Reverse Current Blocking for Unipolar Current Inputs TPS26610, TPS26611 and TPS26612 (4–20 mA, 0–20 mA)
      3. 8.3.3 OUTPUT and INPUT Cutoff During Overvoltage, Undervoltage Due to Miswiring
        1. 8.3.3.1 Output Overvoltage With TPS2661x Devices
        2. 8.3.3.2 Output or Input Undervoltage With TPS26610, TPS26611 and TPS26612
        3. 8.3.3.3 Output Undervoltage With TPS26613 and TPS26614
      4. 8.3.4 External Power Supply (±Vs)
      5. 8.3.5 Loop Testing Without ±Vs Supply (Loop Power Mode in TPS26610, TPS26613 Only)
        1. 8.3.5.1 Supply Sensing With VSNS for Loop Power Mode With TPS26610 and TPS26613
      6. 8.3.6 Enable Control With TPS26611, TPS26612, and TPS26614
      7. 8.3.7 Signal Good Indicator (SGOOD)
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application: Analog Input Protection for Current Inputs with TPS26610
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure for Current Inputs with TPS26610
        1. 9.2.2.1 Selecting ±Vs Supplies for TPS26610
        2. 9.2.2.2 Selecting RBurden
        3. 9.2.2.3 Selecting MODE Configuration for TPS26610
      3. 9.2.3 Application Performance Plots for Current Inputs with TPS26610
    3. 9.3 Typical Application: Analog Input Protection for Multiplexed Current and Voltage Inputs with TPS26611
      1. 9.3.1 Design Requirements
      2. 9.3.2 Detailed Design Procedure for Analog Input Protection for Multiplexed Current and Voltage Inputs with TPS26611
        1. 9.3.2.1 Selecting ±Vs Supplies for TPS26611
        2. 9.3.2.2 Selecting MODE Configuration for TPS26611
        3. 9.3.2.3 Selecting Bias Resistors R1, R2 for Setting Common Mode Voltage for Voltage Inputs
      3. 9.3.3 Application Performance Plots for V/I Inputs with TPS26611
    4. 9.4 System Examples
      1. 9.4.1 Power Supply Protection of 2-Wire Transmitter with TPS26612
      2. 9.4.2 Protection of 3-Wire Transmitters and Analog Output Modules With TPS26611, TPS26612
      3. 9.4.3 UART IO Protection With TPS26611, TPS26612
      4. 9.4.4 Higher Loop Impedance With TPS26613 and TPS26614
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 Support Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

8.4 Device Functional Modes

The device can provide higher current up to 2 × IOL for short durations. MODE pin of the device configures the behavior of the device for higher current. Table 8-3 and Figure 8-24 describe the device behavior in different modes for IOL > 0.

With MODE = GND, the device limits the current to IOL value for IOUT > IOL.

With MODE = OPEN, the device limits the output current as:

  • For IOL < IOUT < 2 × IOL, the device allows current up to 2 × IOL for a duration of tOL_Pulse_Expiry and then limits the current to IOL value for a duration tOL_Expiry.
  • For 2 × IOL < IOUT < I(FASTRIP), the device limits the current 2 × IOL value and for a duration of tOL_Pulse_Expiry and then limits the current to IOL value for a duration tOL_Expiry.
After the completion of tOL_Expiry period, the device goes into auto-retry.

With MODE = 180 kΩ, the device limits the output current as:

  • For IOL< IOUT < 2 × IOL, the device allows current up to 2 × IOL for a duration of tOL_Extend and then limits the current to IOL value for a duration tOL_Expiry.
  • For 2 × IOL < IOUT < I(FASTRIP), the device limits the current 2 × IOL value and for a duration of tOL_Pulse_Expiry and then limits the current to IOL value for a duration tOL_Expiry.
After the completion of tOL_Expiry period, the device goes into auto-retry. If the device heats up during overload and the device temperature exceeds T(TSD) value, the device turns off the internal pass FETs. As the device cools down and its temperature goes below [T(TSD) – T(TSDHyst)] value, the device goes into auto-retry.

Table 8-3 Device Operation Under Different MODE Configurations for IOL > 0
MODE Pin ConfigurationIOUT < IOL (32 mA)IOL (32 mA) < IOUT < 2 × IOL (60 mA)2 × IOL (60 mA) < IOUT < I(FASTRIP)Auto-Retry Time
Shorted to GNDCurrent flows normallyCurrent limited to IOL for a duration of tOL_Expiry (100 ms).
tOL_Expiry (100 ms) timer starts when IOUT exceeds IOL.		Current limited to IOL for a duration of tOL_Expiry (100 ms).
tOL_Expiry (100 ms) timer starts when IOUT exceed IOL.		tRETRY1 (800 ms)
OpenCurrent flows normallyDevice allows current for tOL_Pulse_Expiry (50 ms) time after which it is limited to IOL for tOL_Expiry (100 ms) time and then auto retry.
tOL_Pulse_Expiry (50 ms) timer starts when IOUT exceeds IOL.		Current limited to 2 × IOL for tOL_Pulse_Expiry (50 ms) time after which it is limited to IOL for tOL_Expiry (100 ms) time and then auto retry.
tOL_Pulse_Expiry (50 ms) timer starts when IOUT exceeds IOL.		tRETRY1 (800 ms)
180 kΩ from MODE to GNDCurrent flows normallyDevice allows current for tOL_Extend (5 s) time after which it is limited to IOL for tOL_Expiry (100 ms) time and then auto retry.
tOL_Extend (5 s) timer starts when IOUT exceeds IOL.		Current limited to 2 × IOL for tOL_Pulse_Expiry (50 ms) time after which it is limited to IOL for tOL_Expiry (100 ms) time and then auto retry.
tOL_Pulse_Expiry (50ms) timer starts when IOUT exceeds IOL.		tRETRY2 (1.6 s)
GUID-20200721-CA0I-DH8L-LQPB-F67BRVTFJPXQ-low.gifFigure 8-24 Device Operation Under Different MODE Configurations for IOL > 0

Table 8-4 and Figure 8-25 describe the device behavior in different modes for IOL < 0.

Table 8-4 Device Operation Under Different MODE Configurations for IOL < 0
MODE Pin Configuration IOUT > –IOL (–32 mA) –2 × IOL(–60 mA) < IOUT < –IOL (–32 mA) –I(FASTRIP) < IOUT < –2 × IOL (–60 mA) Auto-Retry Time
Shorted to GND or Open or 180 kΩ from MODE to GND Current flows normally Current limited to IOL for a duration of tOL_Expiry (100 ms).
tOL_Expiry (100 ms) timer starts when IOUT exceeds IOL.		 Current limited to IOL for a duration of tOL_Expiry (100ms). tOL_Expiry (100ms) timer starts when IOUT exceed IOL. tRETRY1 (800 ms)
GUID-20200914-CA0I-6HDM-XV5Q-RFNWSH6WS7WL-low.gif Figure 8-25 Device Operation Under Different MODE Configurations for IOL < 0