LTC4231HUD-1#TRPBF

Programmable Features:	Circuit Breaker, Current Limit, Fault Timeout, OVP, Slew Rate, UVLO
Base Part Number:	LTC4231
Feature Pins:	GNDSW, OV, SENSE, /SHDN, STATUS, TIMER, UVL, UVH
Supplier Device Package:	12-QFN (3x3)
Package / Case:	12-WFQFN Exposed Pad
Mounting Type:	Surface Mount
Current - Supply:	4µA
Operating Temperature:	-40°C ~ 125°C
Current - Output (Max):	--
Voltage - Supply:	2.7 V ~ 36 V
Series:	--
Features:	Latched Fault
Applications:	General Purpose
Internal Switch(s):	No
Number of Channels:	1
Type:	Hot Swap Controller
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Introduction

LTC4231HUD-1#TRPBF is a hot-swap controller technology of Power Management Integrated Circuits (PMICs) that is used to protect against in-rush current and uncontrolled insertion/removal of a power supply. This protects powering devices like racks, boards and system cards from damage due to overcurrent or overvoltage. Hot-swap controllers are also essential parts of advanced current sharing and board-level distributed power system. PMICs hot-swap controller comprise of a wide variety of technologies like LTC4231HUD-1#TRPBF. This article explores the application field and working principle of LTC4231HUD-1#TRPBF.

Overview of LTC4231HUD-1#TRPBF

LTC4231HUD-1#TRPBF is a hot-swap controller designed to prevent in-rush current and uncontrolled insertion/removal of a power supply. It is an integrated circuit integrated into an 8-pin EPAD package with an exposed pad for low thermal resistance. The exposed pad provides a flat surface for efficient heat transfer. It works with voltages up to 25V and currents up to 12A.

Application Field of LTC4231HUD-1#TRPBF

LTC4231HUD-1#TRPBF is a universal hot-swap controller suitable for powering a variety of systems with voltages up to 25V and currents up to 12A, such as telecommunications systems, computing and industrial systems. Its primary purpose is to protect the system by preventing inrush current, overvoltage and uncontrolled insertion/removal of the power supply.In telecommunications systems, LTC4231HUD-1#TRPBF works with the voltage down to 0.9V to protect against inrush current and overvoltage. It also controls the power supply EN signal from the backplane to eliminate the uncontrolled insertion/removal of the power supply. LTC4231HUD-1#TRPBF’s exposed pad provides a flat surface for efficient heat transfer and reduces thermal resistance for safe operation.In computing and industrial systems, LTC4231HUD-1#TRPBF is designed to provide safe operation with a voltage range from 0.9V to 25V and currents up to 12A. Its regulated current amplifier eliminates inrush current and eliminates overvoltage. It\'s EN signal protection and exposed pad ensure safe operation.

Working Principle of LTC4231HUD-1#TRPBF

The working principle of LTC4231HUD-1#TRPBF is based on the voltage divider principle. The voltage divider principle is used between the two power supply input pins (VIN and N/Vin) and the output pad (EN). The output pad (EN) is connected to a voltage regulator. The voltage regulator is configured with a set point of 0.8 V and a resistive divider. When the input pin (VIN) is greater than 0.8V, the output of the regulator provides a high voltage input to the EN pin. This allows the output voltage to be controlled and the inrush current to be limited.When an overvoltage occurs, the output of the regulator goes low and the EN pin is pulled down. This activates an overvoltage protection circuit which reduces the output voltage and cuts off the supply.The exposed pad on LTC4231HUD-1#TRPBF improves thermal dissipation. The exposed pad provides a flat surface for efficient heat transfer from the regulator package to the substrate. This reduces the thermal resistance and ensures safe operation.

Conclusion

LTC4231HUD-1#TRPBF is a hot-swap controller designed to protect against inrush current, overvoltage and uncontrolled insertion/removal of the power supply. It is suitable for use in telecommunications systems, computing systems and industrial systems. Its working principle is based on the voltage divider principle and the exposed pad improves thermal dissipation and reduces thermal resistance.

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