Overview of the TPS2321IDR

The TPS2321IDR is a Hot Swap controller manufactured by Texas Instruments, designed to provide protection to downstream components when connecting to an external or upstream supply. It\'s suitable for use in high power hot plug applications and is capable of controlling current up to 20 amps and supply voltages up to 48 volts.

Application Field

This controller can be used in a range of applications, particularly for high power hot plug systems. These include; telecom, Ethernet, Automotive and Industrial applications.

Features

  • Constant Current: This feature ensures the downstream components are protected from excessive current overload and thermal stress.
  • Push-Pull Cathode: This feature provides a fast fault response, ensuring maximum safety even when dealing with high power applications.
  • Voltage Transient Protection: This feature prevents over-voltage and transient voltage spikes which can cause component damage or system failure.
  • Reverse Current Protection: This feature prevents reverse current flow which can damage or cause system failure.

Working Principle

The TPS2321IDR is designed to provide transient protection and reduce the current flowing into the system when connecting to an external or upstream supply. It uses a two-transistor current setting push-pull cathode that is implemented with an externally adjustable resistor to set the current limit. The current is then monitored by a sense resistor which is connected between the sourcing node and ground, and the output current is adjusted accordingly depending on the sensed value. This also forms an integral part of the thermal protection by limiting the operating temperature of the device.

In addition, the TPS2321IDR features an integrated start-up control to regulate the output voltage, voltage transient protection to control inrush current, reverse current protection to prevent back-flow of current, and a soft-start capability to reduce over-voltage spikes during its powering up.

Conclusion

The TPS2321IDR is a Hot Swap controller designed to provide protection and adjust current while connecting to an external or upstream supply. It offers a range of features such as a constant current setting push-pull cathode, voltage transient protection, reverse current protection and soft start capability for safe and efficient power delivery in high power applications.