LTC1647-1IS8#TRPBF

Series:	--
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Type:	Hot Swap Controller
Number of Channels:	2
Internal Switch(s):	No
Applications:	General Purpose
Features:	Latched Fault, UVLO
Programmable Features:	Circuit Breaker, Fault Timeout, Slew Rate
Voltage - Supply:	2.7 V ~ 16.5 V
Current - Output (Max):	--
Operating Temperature:	-40°C ~ 85°C
Current - Supply:	1mA
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	8-SOIC
Feature Pins:	ON1, ON2
Base Part Number:	LTC1647

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Introduction

The LTC1647-1IS8#TRPBF is a high performance, low power hot swap controller designed for controlling small power management subsystems. This device features a current-foldback (CFB) method of controlling the electrical loads supported by the Unit Under Test (UUT). CFB reduces the power supply drive capability of the UUT, allowing it to continue to supply current to the load as the load current increases. The LTC1647-1IS8#TRPBF also includes other features that help to ensure safe operation and reduce the circuit complexity.

Overview

The LTC1647-1IS8#TRPBF uses an integrated circuit with a primary side and secondary side power switch and an on-chip logic IC to control the power load. The logic IC features a shutdown timer, low- and high-current reporting, and soft-start current-foldback (CFB) capability. The LTC1647-1IS8#TRPBF is designed to operate within an operating voltage range from 2.5V to 26V. The hot swap controller also includes programmable overload, overcurrent, and overtemperature protection.

Applications

The LTC1647-1IS8#TRPBF is ideal for controlling small, distributed power management systems. The hot swap controller can be used in a variety of applications including industrial systems, telecom/datacom systems, audio systems, storage systems, medical systems, automotive systems, and aerospace and military systems.

Working Principle

The LTC1647-1IS8#TRPBF uses a current-foldback (CFB) method to regulate the current delivered to the load. CFB reduces the power supply drive capability of the Unit Under Test (UUT) as the load current increases, allowing it to continue to supply current to the load. In this system, the output current of the UUT is held constant or reduced depending on the load current. This method of controlling the power load helps to ensure safe operation and reduce the complexity of the circuit.The logic IC of the LTC1647-1IS8#TRPBF provides overcurrent, overvoltage, and overtemperature protection. The soft-start CFB function prevents large inrush currents when the load first turns on, allowing the UUT to slowly ramp up its output current. The logic IC also includes a shutdown timer that shuts off the power to the load if the UUT has been preset to power down after a period of time.

Conclusion

The LTC1647-1IS8#TRPBF is a high performance, low power hot swap controller designed for controlling small power management subsystems. The device features current-foldback enabling the UUT to continue to supply current to the load as the load current increases. The hot swap controller also features various protection features such as overcurrent, overvoltage, and overtemperature protection as well as a shutdown timer. The LTC1647-1IS8#TRPBF is suitable for a variety of applications including industrial, telecom/datacom, audio, storage, medical, automotive, and aerospace/military systems.

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