TPS2483PW

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TPS2483PW Application Field and Working Principle

PMIC (power management IC) Hot Swap Controllers are integrated circuits that are used to protect a system from inrush currents (surges) when new loads or power supplies are added to a circuit. Hot swap controllers, such as the TPS2483PW, provide a regulated-voltage output, over-current protection, and control functions while allowing one or more power supplies to be switched on and off (and connected in parallel) without turning off the main power input. The TPS2483PW is a product of the Texas Instruments family of hot swap controllers.

Application Field

The TPS2483PW is designed to provide protection and control functions for up to three parallel power supplies in systems where surges of inrush current could potentially cause harm or overload the components. It is particularly useful for applications that require high current, such as servers, storage systems, switches and routers, as well as LED lighting and motor control systems. In addition, the TPS2483PW is compliant with the IEC 60950-1 standard, ensuring that electromagnetic interference does not cause problems with system performance.

Working Principle

The TPS2483PW is a compact, high-voltage, current limited hot swap controller specifically engineered to allow three power supplies to be switched on and off while keeping the main input power on. It has a wide operating voltage range of 6V to 26V and can handle up to 3.6A of current. The basic principle of operation is to control the output voltage of the controller and monitor the current in the system. If the system exceeds its operational limits, the controller will shut down the outputs in order to protect the system from damage that could be caused by an inrush current.

How does the TPS2483PW protect the system? This is achieved using advanced feed-forward and current-mode control circuitry, in combination with an external MOSFET, to regulate the output voltage of the power supplies. The controller monitors the current across the MOSFET, detects any discrepancy between the actual current and the limit set by the external current-limit resistor, and, if necessary, shuts down the MOSFET to protect the system from further damage.

In addition, the TPS2483PW also offers several features to enhance system performance and safety, including brown-in and brown-out protection, over-temperature protection, automatic N-channel FET circuit breaker and fault detection. It also features a host of option settings and adjustable parameters, enabling system designers to customize the response of the controller to the specific needs of their application.

Conclusion

The TPS2483PW is a high-voltage, current limited hot swap controller specifically designed by Texas Instruments to provide protection and control for three parallel power supplies. It provides a wide operating voltage range, current limiting, over-temperature protection, as well as a host of additional features that enhance system safety. The advanced feed-forward and current-mode control circuitry make the TPS2483PW an ideal choice for protecting systems from inrush currents and other unwanted electrical disturbances.

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