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PMIC – Hot Swap Controllers

The TPS239xDGK devices are hot swap controllers and Voltage Supervisors from Texas Instruments’ family of integrated hot swap power solutions. They are used in systems that need in-rush current limiting, accurate overvoltage protection, and undervoltage detection. The TPS239xDGK devices are used in many applications since they are robust, reliable, and easy to design with.

Application Field

The TPS239xDGK hot swap controllers and voltage supervisors are used to switch peripheral boards in an inverter/charger, such as a charging capacitor, motor drive, or isolated DC rail. Inverters serve an integral function in all sorts of electronic systems, from renewable energy systems and telecom towers to vehicles or uninterruptible power supplies.

In system units, the device can be used to safely power peripherals, protecting both the unit and the peripheral from damage due to excessive power or voltage. In some cases, the device can also be configured for other applications, such as protecting system peripherals from overvoltage and reversing current.

Moreover, TPS239xDGK hot swap controllers can be used in various I/O protection applications, from LAN switches and power over Ethernet (PoE) modems to universal serial bus (USB) ports and any other system where in-rush current, overvoltage, or undervoltage protection is required.

Working Principle

The TPS239xDGK hot swap controllers and voltage supervisors consist of a switching regulator that can be used to provide in-rush current limiting, as well as an overvoltage and undervoltage supervisor. They also provide a fail-safe circuit monitor, fault reporting, and overtemperature protection.

The switching regulator is responsible for limiting the in-rush current to the peripheral device by controlling the gate voltage of the external MOSFET. This is particularly useful for system applications that are connected to an AC or DC source, such as inverters or chargers. The overvoltage / undervoltage supervisor monitors the system voltage and will sound an alarm if the voltage goes above or below the programmed threshold. This feature is useful in protecting system peripherals from voltage surges or dips, which could potentially damage the system.

The device also provides a fail-safe circuit monitor that checks for any open or shorted electrical contacts. Finally, the device provides an overtemperature protection feature, ensuring the system operates safely within the given temperature limits.

Conclusion

The TPS239xDGK hot swap controllers and voltage supervisors are widely used in operational systems that require in-rush current limiting, overvoltage and undervoltage protection, and overtemperature protection. They provide robust, reliable, and easy to design with solutions for system units and I/O protection applications.

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