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 Normal Operation Diagnostics

Aside from simple on-off operation, most TI smart high-side switch devices come with diagnostics that help monitor regular operation. Some devices have pins that allow measuring the operating load current on the Current Sense [CS] pin. As the device is best kept operating below a certain temperature threshold, the device junction temperature may also be of interest when monitoring device operation. The following sections discuss how to configure the different operations on devices that are able to and also how to optimize current measurements. Table 2-1 lists the devices that are able to measure load current or both device temperature and load current by using their Current Sense (CS) or Sense (SNS) pins.

Table 2-1 Devices With Current Sense or Sense Pins
Feature Devices
Current Sensing: CS or Current Sense (ISNS) Pin TPS1H100-Q1, TPS27S100, TPS2H160-Q1, TPS4H160-Q1, TPS2H000-Q1, TPS4H000-Q1
Current and Temperature Monitoring: SNS Pin TPS1HA08, TPS1HBxx, TPS2HBxx
No Current Sensing or Temperature Monitoring TPS1H200A-Q1, TPS1H000A-Q1