TPS2391DGKG4

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The TPS2391DGKG4 integrated circuit (IC) from Texas Instruments is an advanced low-voltage hot swap controller designed to control the power distribution of a high-current system. It works in conjunction with external power switches and voltage supervisors to reduce the power risk of hot-swapping devices in high-current applications. The device uses an uncalibrated low-side current sense circuit, together with a digital control loop feedback and limit circuitry, to provide accurate and reliable overcurrent protection. This makes the TPS2391DGKG4 an ideal solution for applications involving high-current, high-voltage systems, such as hot-swappable drives and backplanes, power-supply distribution systems, and networking and telecom systems.

The TPS2391DGKG4 has multiple functions that enable greater control and safety when hot-swapping devices. The first is the delay-on turn-on feature, which allows the device to turn on the power switch after a configured delay—giving the system time to boot up and avoid any critical start-up failures. The second function is the zero-crossing turn-on feature, which ensures that the power switch turns on during the gap between alternating current cycles, reducing the inrush current to the system and providing greater system stability. Furthermore, the device offers adjustable slew rate control, allowing users to adjust the amount of current that is supplied to the system during the power-up phase. This helps to reduce the possibility of an over-current fault due to the firing of the power switch.

The TPS2391DGKG4 has two Power Good output options that allow further customization of the power sequencing. When enabled, the device will activate the power switch only after both the voltage present output and the power good output have been asserted. This ensures that the system has been properly powered up before the power switch is turned on, allowing for greater control of the power requirements for the system. These outputs can be configured to operate at either the micro-power or regular power supply levels, allowing for greater flexibility when powering multiple loads.

Aside from the control features, the TPS2391DGKG4 offers several safety features. One such feature is programmable overcurrent detection and protection, which helps to prevent outages and damage that could be caused by a sudden increase in current draw. The device can also be programmed with a maximum operating temperature threshold, which can help to protect the system in the event of a temperature rise. Finally, the device is capable of shut offing the power supply in the event that an undervoltage or overvoltage condition occurs, protecting components and circuits from potential damage due to voltage spikes or drops.

The TPS2391DGKG4 is a versatile and reliable hot swap controller that allow users to ensure that power distribution is accurately and safely managed in high-current applications. Its features, such as the adjustable slew rate, power good output, delay-on turn-on, and temperature monitoring, make it an ideal solution for hot-swapping drives and backplanes, networking and telecom systems, and power supply distribution systems. The device is also capable of shutting off the power supply in the event of an undervoltage or overvoltage condition to keep components safe from potential damage.

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