TPS2306DW

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TPS2306DW Application Field and Working Principle

The TPS2306DW is a hot swap controller that allows the insertion and removal of a load while the system is powered up. It is an ideal solution for any system requiring hot-swap protection in high-voltage applications. This device is designed to provide safe and efficient current-sharing control during hot-swap applications and is optimized for the following applications.:

• High-current, multi-rail power distribution systems.
• Multiple, parallel hot-swap power.
• Dynamic current sharing.
• Server & Networking.
• Active parallel redundancy.
• Distributed power designs.

Basic Operation

Unlike a typical hot-swap controller, the TPS2306DW manages the current distribution throughout hotswap insertion and removal. It acts as a medium between the power source and load and allows the load to be hot-swapped without overloading the power source. As the load is connected or disconnected, the TPS2306DW monitors the voltage across the power rails and adjusts the current distribution to ensure that the power is delivered in a safe and consistent manner. The device is also capable of addressing over-current conditions and provides short circuit protection by cutting off the source voltage when the voltage across the power rail exceeds a predetermined level. In addition, the TPS2306DW also provides thermal protection.

Architecture

The TPS2306DW features a high-frequency, variable-current architecture which allows the device to support a wide range of output voltages and currents. The device consists of two main components, the PowerControl and the Synchronous Power Converter. The PowerControl is a programmable current amplifier that regulates the output current to the load. It operates in closed-loop mode, enabling the device to maintain a predictable current output with minimal variation. The Synchronous Power Converter consists of two stages, the driver stage, and the power stage. The driver stage is responsible for providing the necessary gate drive to the power stage and the power stage controls the power delivered to the load. The power stage operates in an open-loop mode, meaning that the output voltage is determined by the supply voltage and the load. As the load is enabled or disabled, the output voltage can be adjusted to maintain a consistent current delivery.

Operation

In order to operate, the TPS2306DW must be connected to a supply voltage and unloaded voltage sense inputs. The unloaded voltage sense inputs are used to detect the voltage across the power rails when the load is enabled or disabled. Once enabled, the TPS2306DW will monitor the voltage across the power rails and determine the current needed to adequately supply the load. It then modulates the current accordingly and ensures a consistent current delivery during hot-swap operations. The device also provides over-current protection, under-voltage protection, thermal protection, and short-circuit protection by monitoring the voltage levels and cutting off the supply voltage when they exceed predetermined levels.

Conclusion

The TPS2306DW is an efficient and reliable hot-swap controller designed for high-current, multi-rail power distribution systems. It allows the insertion and removal of a load while the system is powered up and provides overcurrent protection, under-voltage protection, thermal protection, and short-circuit protection. The device is optimized for applications requiring dynamic current sharing and is an ideal solution for server & networking, active parallel redundancy, and distributed power designs.

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