TPS25921LDR Integrated Circuits (ICs)

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Introduction:

TPS25921LDR, produced by Texas Instruments, is a Hot Swap Controller. It is used in applications ranging from mobile computing to consumer electronics, enabling power supply design flexibility, battery charging, thermal management, overload and fault protection. This article will discuss its application field and working principle.

Application Field:

The TPS25921LDR Hot Swap Controller is typically used in applications such as charging removable battery packs, eliminating the need for a high-side power switch and providing thermal management, protection, and other functions. It can be used in low-voltage hot-swapping applications such as smartphones, tablets, and other consumer electronics. Additionally, the TPS25921LDR can be used in prototyping applications, providing quick, easy, and cost-effective system-level hot-swapping, protecting the attached circuitry from potential damage.

Working Principle:

The TPS25921LDR Hot Swap Controller is comprised of two components: a Hot Swap MOSFET, and a current limit circuit. The Hot Swap MOSFET is used to control the power supply to the system, and the current limit circuit is used to protect the system from overcurrent conditions. When the Hot Swap MOSFET is off, the system power supply is disconnected and the TPS25921LDR is in a standby mode. When the Hot Swap MOSFET is on and the system power supply is connected, the current limit circuit is enabled and will protect the system from overcurrent conditions by limiting the current to a predetermined value. The TPS25921LDR also includes an overvoltage protection circuit, an open drain overcurrent protection circuit, and an adjustable thermal shutdown circuit. These features provide additional protection for the system.

Conclusion:

The TPS25921LDR Hot Swap Controller is used in applications ranging from mobile computing to consumer electronics. It is comprised of two components: a Hot Swap MOSFET, and a current limit circuit. The Hot Swap MOSFET is used to control the power supply to the system, and the current limit circuit is used to protect the system from overcurrent conditions. Additionally, the TPS25921LDR includes an overvoltage protection circuit, an open drain overcurrent protection circuit, and an adjustable thermal shutdown circuit, providing additional protection for the system.

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