TPS25944ARVCT

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TPS25944ARVCT Application Field and Working Principle

The TPS25944ARVCT, which belongs to the family of hot swap controllers, is an input voltage supervisor that helps protect the system against overvoltage conditions and inrush current during hot plug-in events.A hot swap controller is a power solution that allows an electronic device, such as a capacitive or inductive load, to be safely inserted or removed while power is applied. A hot swap controller maintains a desired acceptable voltage range within the system during hot plug-ins in order to protect the system’s circuitry and components, thus preventing damage and system malfunction.The TPS25944ARVCT serves as an internal voltage supervisor and ideal protection solution for hot swapping of LED and LCD panels, AC/DC power supplies, USB cables and charging ports, and for any system that interfaces with external power sources.The TPS25944ARVCT’s application field includes AC/DC and DC/DC applications that require hot-swap capabilities. The controller also supports hot-swapping of multiple power sources, such as wall adapters, USB ports and car adapters.The TPS25944ARVCT is an integrated hot swap controller with on-chip input overvoltage protection. The device provides a simple and complete solution to directly connect five LED strings in series configuration with two levels of output current capability.It features an on-chip overvoltage protection comparator circuit with adjustable threshold levels and built-in programmable logic to protect the system against high voltage levels during hot plug-in events. An optional feature allows the input overvoltage protection comparator to be externally enabled or disabled.The TPS25944ARVCT operating principles are designed to protect the system against undesired overvoltage conditions. The TPS25944ARVCT hot swap controller features a low side switch that is connected to the system ground or within a range of 0.6V to 6V.Once the input voltage is applied to the device, the comparator inside the TPS25944ARVCT compares the input voltage to the set threshold value, and either enables the low side switch and allows the current to flow or turns off the switch, depending on the voltage level.In addition, the TPS25944ARVCT hot swap controller also offers input current limitation, output current limitation and hysteretic control to protect the system against excessive input current and system overloading brought about by hot plug-in events.

Conclusion

In conclusion, the TPS25944ARVCT hot swap controller is designed to provide protection against overvoltage conditions and inrush current during hot plug-in events. It features on-chip input overvoltage protection, low side switch with an adjustable range, input current limitation, output current limitation and hysteretic control. The TPS25944ARVCT is suitable for hot swapping of LED and LCD panels, AC/DC and DC/DC power supplies, USB cables and charging ports, and any system that interfaces with external power sources.

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