LTC1643ALCGN#TRPBF

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The LTC1643ALCGN#TRPBF is a high performance Hot Swap Controller, part of Linear Technology’s Power Management Integrated Circuit (PMIC) range. This part is designed to control and protect load devices that require a steady supply of power, and consists of a Hot Swap control circuit suitable for handling large currents, N-channel MOSFET current source, charge pump, and power path control circuit. The LTC1643ALCGN#TRPBF is designed to provide the primary control and protection of the power supply and load, and it can be used in a wide variety of applications including:

• Server, network and communications equipment power supplies
• Hot pluggable drives
• Automotive applications
• Battery supplies
• Low voltage distributed power architectures
• Sensor architectures

It can also be used to control and protect a wide range of other devices, such as mobile phones, laptop computers and portable media players.

Features of the LTC1643ALCGN#TRPBF

• Monitors current directly or indirectly through a shunt resistor
• Current limit and over-current protection features
• Fully-programmable start-up sequence for controlling inrush current
• Configurable auto-retry and auto-shutdown operation with input pins programs the limit current and over-current trips
• High current sense accuracy with typical 0.45% error rate
• Supports N-channel MOSFETs in switching applications up to 10A loads
• Dual MOSFETs for up to 20A loads

Working Principle of the LTC1643ALCGN#TRPBF

The LTC1643ALCGN#TRPBF Hot Swap Controller employs a current monitoring technique to measure the load current. The output protects and controls the load over current and over temperature conditions. The load current is monitored by a sensing circuit that converts the sensed load current into an output voltage proportional to the load current. This output voltage is then compared against an internal reference voltage to set an over current threshold. When the load current reaches the programmed threshold, the controller switches off the load until it is reset. It also provides power sequencing, over temperature protection and over voltage protection.

The controller also features a range of programmable features that allow the system to be easily configured for different applications. This includes a current limit setting for both constant and programmable current levels, as well as a range of options for triggering over current protection. It also includes a thermal protection mode for when the system detects an over temperature condition, which automatically shuts down the load circuit and prevents further damage to the device.

Conclusion

The LTC1643ALCGN#TRPBF is an advanced Hot Swap Controller designed to protect and monitor a wide range of applications. It is designed to provide over current and over temperature protection, power sequencing and configurable auto-retry and auto-shutdown operations. It is suitable for use in a variety of applications, including server, network and communications equipment power supplies, hot pluggable drives, automotive applications, battery supplies, low voltage distributed power architectures and sensor architectures.

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