LTC4252-1IMS#PBF

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LTC4252-1IMS#PBF belongs to the classification of PMIC - Hot Swap Controllers. It is a highly integrated hot swap controller family which enables two peripheral device channels and one control channel operating at up to 6A of output current. The primary application of this IC is as a Hot Swap controller in telecom, data storage and other industrial applications where output power is to be managed safely and remotely. Being able to monitor and control up to two output power supplies, the user can easily implement power cycling and protection against fault conditions.

The LTC4252-1IMS#PBF includes several protection circuits, such as an over voltage protection (OVP) circuit, an over current protection (OCP) circuit and a short circuit protection (SCP) circuit. It can detect the presence of a negative voltage on the VL- pin and then the source of the fault is indicated on the INTB output pin. This controller also features an Under Voltage Lockout (UVL) circuit that prevents output power up to a predefined level. This is a useful feature for controlling when a power supply can be enabled or disabled. Additionally, an adjustable dead time feature for the output enable pins delays the startup time of the supply after reset or disable. This can be used to limit the inrush current of the supply to a safe level.

The LTC4252-1IMS#PBF is an ideal hot swap controller for powering critical applications. Its easy implementation and the wide range of features enable a complete control of output power and power-up sequencing. This effectively reduces the risk of overload, over voltage, and short circuits on the output power lines. The device is capable of operating in temperatures ranging from -40℃ to +85℃ and has a maximum junction temperature of +125℃. The integrated thermal shutdown feature can help prevent the IC from operating outside of a safe temperature limit.

The basic working principle of the LTC4252-1IMS#PBF is quite simple. The IC has two integrated MOSFET drivers which can be used to control two power channels. The power paths are each independently enabled via an ENx input or an SPI command. If the voltage or current levels exceed the preset limits, the appropriate OVP, OCP or SCP fault flag and alarm will be set. Additionally, the IC is equipped with an OVERTHERMAL pin which is used to monitor the power board’s thermal conditions. This pin can also be externally connected to a temperature sensing diode for precise temperature monitoring.

In summary, the LTC4252-1IMS#PBF is a cost-effective hot swap controller solution that enables the protection and monitoring of two power supplies. In addition to its extensive set of protection features, it also provides a flexible way of controlling the output power with an adjustable dead time feature and a programmable overvoltage limit. With its excellent temperature and over-current protection, this hot swap controller is an ideal choice for any telecom, data storage and industrial applications in need of a reliable, cost-effective power management solution.

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