SLVAEX0 October   2020 TPS1H000-Q1 , TPS1H100-Q1 , TPS1H200A-Q1 , TPS1HA08-Q1 , TPS1HB16-Q1 , TPS1HB50-Q1 , TPS2HB16-Q1 , TPS2HB50-Q1 , TPS4H000-Q1 , TPS4H160-Q1

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
  4. 2Normal Operation Diagnostics
    1. 2.1 Configuring Diagnostics With SEL/SELx Pin
      1. 2.1.1 Diagnostics Select Pin: SEL1
      2. 2.1.2 Diagnostics Select Pin: SELx
    2. 2.2 Operating Current Measurements Using the SNS/CS Pin
      1. 2.2.1 Internal/External Factor: Load Current Through Device
      2. 2.2.2 External Factor: Analog-to-Digital Converter (ADC)
      3. 2.2.3 External Factor: Probe Ground Termination
      4. 2.2.4 External Factor: Component Tolerances
    3. 2.3 Device Temperature on the Sense (SNS) Pin
  5. 3Fault State Diagnostics
    1. 3.1 Fault Behavior Configurations: Latch/THER/Delay Pin
      1. 3.1.1 Latch Pin
      2. 3.1.2 THER Pin
      3. 3.1.3 Delay Pin
    2. 3.2 Open Load Fault
    3. 3.3 Short to Battery Fault
    4. 3.4 Thermal Shutdown
    5. 3.5 Loss of Ground or Power Supply
    6. 3.6 Summary
  6. 4References

2.1.2 Diagnostics Select Pin: SELx

For devices that have multiple SEL pins such as the TPS1HA08, the device is able to be configured in three ways: device temperature, load current, or supply voltage. As with the single SEL pin devices, device temperature allows for measuring the internal junction temperature and the load current measurement allows for a proportionate voltage signal that reflects the load current. An additional setting allows for monitoring the supply voltage that is supplying power to the output, which is helpful in applications where a battery is involved such as in the automotive industry. For devices with multiple channels, additional SEL pins are used to select which channel to monitor.

Table 2-4 shows the different diagnostics that are used in the SELx pins on the TPS1HA08-Q1 and how to configure them. Table 2-5 shows the configurations that available on the SELx pins on the TPS2HB16 and the settings associated with them.

Table 2-4 SELx Configuration for the TPS1HA08-Q1
SEL1 State SEL2 State SNS Pin Output
Low Low Load Current
Low High No Diagnostics
High Low Device Temperature
High High Supply Voltage
Table 2-5 SELx Configuration on the TPS2HB16-Q1
SEL1 State SEL2 State SNS Pin Output
Low Low Channel 1 Load Current
Low High Channel 2 Load Current
High Low Device Temperature
High High N/A