TPS259571DSGR

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TPS259571DSGR application field and working principle

As an advanced Hot Swap controller, TPS259571DSGR can provide an elegant solution to effectively control inrush current while plugging power into a system. This kind of integrated circuit (IC) monitors the voltage of a system and accurately controls the GATE node of the synchronous buck converter. With its excellent current monitoring capabilities, firmware programming, and advanced protection functions, TPS259571DSGR makes the architecture of power systems smaller and simpler.

Application Field

TPS259571DSGR serves as a gate driver for Hot Swap applications. It is widely used in system architectures that require inrush current protection, such as for peripherals, dual-port memory, and multi-voltage power systems. It could also be used in data centers, storage systems, and distributed architectures.

Working Principle

TPS259571DSGR is based on a synchronous buck topology. It features an internal current monitor, an over-temperature protection, brownout detection, and an adjustable programmable turn-on/turn-off voltage setting. The gate driver monitors the supply voltage VIN connected to the system and the GATE of the synchronous buck converter.

When the VIN voltage drops below a certain threshold, the device turns off the GATE node of the synchronous buck converter to prevent inrush current. The controller supports a range of input supply voltages from 4.5V to 14V and provides an adjustable soft-start control to control the startup current. The device also supports an adjustable programmable turn-on/turn-off voltage setting.

In addition, the device has an internal current monitor and an over-temperature protection feature. The current monitor continuously measures the current flowing through the synchronous buck converter. If the current value is higher than the threshold value, the device will turn off the GATE node to reduce the current. The over-temperature protection feature monitors the die temperature and will shut down the device if the temperature rises above the set temperature threshold.

Moreover, the device has a wide operating temperature range of -40°C to 125°C, which makes it suitable for a variety of environments. It also has a low leakage current at the GATE of 2μA to minimize any effects on the external circuit.

Conclusion

TPS259571DSGR is an advanced Hot Swap controller with excellent current monitoring capabilities and advanced protection functions. It uses a synchronous buck topology and ensures predictable start-up behavior and low inrush current. With its wide operational temperature range of -40°C to 125°C, it is suitable for a wide range of applications, such as dual-port memory, data centers, and distributed power systems.

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