UCC3912DP

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The UCC3912 series Hot Swap Controllers are ultra low-power and high efficiency power switches designed to protect the circuits from inrush current, overvoltage, overcurrent and overtemperature. As a Power Management IC (PMIC), these Hot Swap Controllers allow safe and reliable hot-swapping of high power loads into highly sensitive systems.

These controllers are available in fixed and adjustable voltage versions, offering flexible options for different applications. The UCC3912 series Hot Swap Controllers feature an on-chip FET device and programmable current limit, along with other advanced features like adjustable and programmable deglitch. The high-current, low-Rds(on) FET provides efficient hot plugging and short-circuit protection.

Applications

The UCC3912 series Hot Swap Controllers can be used in a wide range of hot-swap applications, such as system hot-plugging, power-up sequencing, overcurrent protection and fault-tolerant systems. These controllers are ideal for applications that require low power consumption and reliable protection, such as industrial and automotive systems, data communication systems and smartphone batteries.

Working Principle

The UCC3912 series Hot Swap Controllers feature an on-chip FET device, which can be configured as N-channel or P-channel. The internal FET device is normally off and only turns on when a valid input signal is applied. Once the valid input signal is applied, the FET device starts to conduct to control the current flow.

The controller also features multiple safety and protection functions, including inrush current limit, overvoltage protection and overcurrent protection. The inrush current limit prevents large inrush currents from damaging the system due to sudden power surge. The overvoltage protection feature prevents overvoltage from damaging the system by cutting off the power when the output voltage exceeds the pre-defined threshold. The overcurrent protection function cuts off the power when the output current is above the programmed limit.

The controller also features a programmable deglitch feature, which removes the overshoot and undershoot of power surges. This feature prevents various transient phenomena from damaging the system. In addition, the controller features an adjustable fault response, which allows the controller to respond to various types of fault conditions.

Conclusion

The UCC3912 series Hot Swap Controllers are ultra low-power and high efficiency power switches ideal for a wide range of hot-swap applications. These controllers feature on-chip FET device and programmable current limit, along with other advanced features like adjustable and programmable deglitch and adjustable fault response for reliable protection of hot-swapping systems.

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