LTC4253IGN#PBF

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The LTC4253IGN#PBF is a part of PMIC (Power Management Integrated Circuit) Hot Swap Controllers. It is used for controlling the power supply transistors to switch on/off board power to an external supply. The controller can be used in hot swap applications such as medical, telecom, point-of-sale, industrial, server/workstation and other portable devices.

The LTC4253IGN#PBF has many features that make it desirable for hot swap applications. These features include:

• Adjustable current limit with independent logic control.
• Independent power control and driver circuitry.
• Capacitive Load Sensing:The LTC4253IGN#PBF has a capacitive load sensing circuit that monitors the capacitive load on the supply rail. When the capacitive load exceeds a threshold value, the controller begins to increase the current limit in order to protect the power device from overloading or even worse, damage.
• Protection from Over-voltage Conditions:The LTC4253IGN#PBF also contains a voltage monitoring circuit that monitors the external voltage and will activate the protection circuitry when the voltage rises above a certain threshold. This ensures the power device is protected from over-voltage conditions.
• Thermal Shutdown:The LTC4253IGN#PBF contains a thermal shutdown circuit to protect the power device from overheating. When the temperature of the power device exceeds a certain threshold, the controller will shut down the power supply to the power device.
• Under-voltage Cutoff:The LTC4253IGN#PBF also contains an under-voltage detection circuit that monitors the external voltage and shuts down the power supply to the power device when the voltage falls below a certain threshold. This provides protection against overloading or damage to the power device.

Working Principle: The LTC4253IGN#PBF uses a proprietary Setpoint Voltage Regulation (SVR) architecture to sense and regulate the output voltage of the power supply to the external load. When the output voltage of the power supply drops below the SVR threshold, the controller begins to increase the current limit in order to maintain the output voltage of the power supply. When the current limit reaches its predefined limit, the controller initiates a runaway detection circuit that shuts down the power supply to the external load. This provides protection against overloading or damaging the power device.

The LTC4253IGN#PBF also contains an adjustable slew rate control. This allows the user to set the speed at which the output voltage is ramped up or down when the supply voltage changes, ensuring that the power device is protected from overloading or damaging.

In addition to the SVR and slew rate control, the LTC4253IGN#PBF contains a fault timer that monitors the output voltage of the power supply and initiates the protection circuitry when it exceeds a predefined time limit. This ensures the power device is protected from overloading or damage in the event of a sustained overload or underload.

The LTC4253IGN#PBF provides comprehensive protection for hot swap applications, ensuring the power device is safe from both overloading and underloading conditions. This makes the LTC4253IGN#PBF an excellent choice for applications requiring a robust, reliable and safe power management solution.

The specific data is subject to PDF, and the above content is for reference