LTC4216CMS#PBF

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The LTC4216CMS#PBF is a hot swap controller belonging to the PMIC (Power Management Integrated Circuits) family. It is primarily used for managing inrush currents for hot swapping of power sources and for protecting against fault conditions. This integrated circuit is designed to provide a low-cost, easy to use solution for controlling power supply applications. It is able to schedule adaptive load fault recovery, load current monitoring, and hot insertion. Additionally, it also provides a control circuit to enable and disable the output, guaranteeing steady operation of the connected devices.

Overview of the Features

• Fault Management: The LTC4216CMS#PBF is designed to provide fault management for high currents and dynamic inrush control. It supports fault monitoring and signaling for configuration of output voltage and current limits and even for programming ENABLE thresholds.
• Current Monitoring: This integrated circuit allows for monitoring of load current in the positive or negative cycles. A signal is sent to enable or disable the output voltage supply when the output current exceeds the set current limit.
• Hot Insertion: The LTC4216CMS#PBF is particularly useful for hot plugging power sources as it offers a robust hot insertion circuit to reduce risk of damaging the connected equipment. By providing sufficient control of the insertion and removal current, it helps to prevent uncontrolled power surges.
• Adaptive PSRR Clamping: The circuit utilises adaptive power supply rejection clamping which can reduce the output voltage slew rate during hot insertion, thereby preventing large inrush currents from being drawn.

Application Fields

The LTC4216CMS#PBF is used in a wide range of hot swap applications, such as PC MODEMS, PCMCIA cards and DB9 connectors. It is also used to support a broad range of equipment, including LCDs and storage, as well as for hot pluggable power supplies. Further applications include routers, laptops, CPUs, DIMMs and PCI cards.

Working Principle

The LTC4216CMS#PBF first turns on the current limit after monitoring the positive or negative cycle of the current. If the chosen limit is exceeded, it shuts down the circuit, preventing any further damage. It then turns on the UVLO (Under Voltage Lock Out) feature, allowing the output to turn on when the voltage is once again above the set voltage. In the case of fault conditions or over current events, the device quickly shuts off the output voltage, protecting it from damage and allowing it to recover.

The LTC4216CMS#PBF also features adaptive PSRR (Power Supply Rejection Ratio) clamping, which helps to reduce the output voltage slew rate during hot insertion. This helps to prevent large inrush currents from being draw, ensuring the safety and efficiency of the connected components. Finally, the integrated circuit is capable of easily configuring a set of outputs, allowing for the monitoring and control of multiple devices.

Conclusion

The LTC4216CMS#PBF is a hot swap controller designed to provide a low-cost, easy to use solution for controlling power supply applications. It offers fault management, current monitoring, hot insertion, and adaptive PSRR clamping, making it ideal for use in a range of hot swap power supply applications. By taking advantage of its features, it is possible to ensure the safe and efficient transfer of power sources in applications ranging from PCs to routers.

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