LTC4251BCS6-2#TRPBF

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PMIC - Hot Swap Controllers

The LTC4251BCS6-2#TRPBF is a member of a family of hot swap controllers, designed to control and protect power load switching on hot plugging system. These controllers offer protection against overvoltage and short circuit, and feature power good, active current limit and inrush current control capabilities. The LTC4251BCS6-2#TRPBF provides a unique level of system design flexibility and functionality, making it suitable for a wide range of applications.

Application Field

    The LTC4251BCS6-2#TRPBF is designed to monitor, protect, and limit inrush current in hot plugging systems, allowing smooth system power-up. The controller operates a wide operating temperature range of -55°C to +125°C, thus making it suitable for a wide range of applications. Its unique level of integration comprises an additional level of system protection that ensures greater reliability and presents an ideal solution for systems where reliability is of utmost importance. The device is ideal for applications that demand protection and current limit control at the system level, such as:

• Data storage systems
• Battery charging systems
• Network infrastructure applications
• Telecommunications equipment
• Industrial systems
• Medical systems
• Automotive systems

Working Principle

    The LTC4251BCS6-2#TRPBF is a precision two-level hot swap controller. The device provides two channels of inrush current control. The first channel is adjustable and its output current may be configured to cut-off at any level up to 10A. The second channel is fixed and cuts-off at 8A, thus providing an additional level of protection. The two channels have separate enable pins, which allows the user to enable each channel independently.

The device features a high accuracy power good output voltage monitoring circuit, which monitors for both over-voltage and under-voltage conditions. When the output voltage rises above the set point, the device issues a power good signal through its power good output pin. Additionally, the device has an output voltage auto-reset capability, which allows it to automatically reset the power good output voltage on the rising edge of output voltage.

The device features an active current limit circuitry which constantly monitors the load current, and limits it to a fixed maximum level of 10A. It also features an on-chip thermal shutdown feature which shuts down the device in the event of excessive thermal conditions. The device also provides short circuit protection by monitoring the load current and triggering a fault condition if the current falls below a pre-determined level.

The device can be programmed to enable or disable one or both of its channels via software. When the enable pins are asserted, the device will enable the corresponding channels and initiate a power-up sequence. The device will then monitor the output voltage and the load current and will adjust the power good output voltage level appropriately.

In addition, the device also provides an external enable control pin, which can be used to immediately disable either or both channels in the event of an over-current or short circuit condition. This allows the user to quickly shut down the system and prevent damage to connected components.

Overall, the LTC4251BCS6-2#TRPBF is an ideal device for those applications that require a high degree of protection and current limit control at the system level. Its comprehensive protection features make it an ideal solution for those applications that demand reliability and superior system protection.

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