ADM1171-2AUJZ-RL7

Programmable Features:	Current Limit, Fault Timeout, Turn On Voltage
Base Part Number:	ADM1171
Feature Pins:	ON (ON-/CLR), SS, TIMER
Supplier Device Package:	TSOT-23-8
Package / Case:	SOT-23-8 Thin, TSOT-23-8
Mounting Type:	Surface Mount
Current - Supply:	650µA
Operating Temperature:	-40°C ~ 85°C
Current - Output (Max):	--
Voltage - Supply:	2.7 V ~ 16.5 V
Series:	--
Features:	I²C, Latched Fault, UVLO
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 to PMIC - Hot Swap Controllers

The term Power Management Integrated Circuit (PMIC) generally refers to a type of integrated circuit (IC) that enables integrated control, monitoring and protection functions in most of modern electronic circuits and products. PMICs are designed to simplify the implementation of circuit designs in a number of electrical applications. Along with power ICs, hot swap controllers are one of the most important components of PMICs.

What Are Hot Swap Controllers

Hot swap controllers are designed to provide protection to circuits from high inrush currents and large transients associated with connector hot swapping. It is also designed to switch transducers on and off without turning off the power going to the connected load. This prevents the connectors from experiencing damage due to hot swapping. Hot swap controllers also have the capability to monitor voltage level, current draw and temperature.

ADM1171-2AUJZ-RL7 Application Field and Working Principle

The ADM1171-2AUJZ-RL7 Hot Swap Controller is a highly integrated IC designed to provide circuit protection in high voltage, connector hot swapping applications. It is a low-power, low-voltage power MOSFET controllers capable of controlling up to 2A/15V/100W power MOSFETs. It contains two independent MOSFET drivers with an integrated LED driver that can be used for status indication and alarm outputs. The ADM1171-2AUJZ-RL7 Hot Swap Controller is designed to ensure safe operation during the plug-in and unplugging of the connectors. This is done by monitoring current, temperature and voltage levels. It provides overvoltage protection, thermal shutdown and a soft start feature to protect the devices against high inrush currents. The overvoltage protection monitors the input voltage against the voltage on the power supply rail and is activated if the voltage exceeds the pre-set voltage threshold. In addition, it includes an adjustable soft start feature that limits the inrush current to a safe level during start-up and helps protect the system from dangerously high inrush currents. It is also designed to ensure a smooth transition from standby to active state, reducing the power dissipation associated with the on/off switching. The ADM1171-2AUJZ-RL7 Hot Swap Controller also features an integrated temperature sensing circuit that monitors the temperature of the power MOSFETs and the circuit environment. It will trigger the thermal shutdown mode if the temperature has exceeded the pre-set temperature threshold. The LED driver allows for both LED on/off control and LED current regulation output. In conclusion, the ADM1171-2AUJZ-RL7 Hot Swap Controller is an integrated circuit specifically designed to provide protection and monitoring functions in high voltage, connector hot swapping applications. It contains several safety features such as overvoltage protection, thermal shutdown and a soft start feature that help protect the system from high inrush currents and help ensure a smooth transition from standby to active state. In addition, it includes an integrated LED driver and temperature sensing circuit.

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