ISL61853FIRZ-T

Programmable Features:	--
Base Part Number:	ISL6185
Feature Pins:	/EN1, /EN2, /FLT1, /FLT2
Supplier Device Package:	10-DFN (3x3)
Package / Case:	10-VFDFN Exposed Pad
Mounting Type:	Surface Mount
Current - Supply:	50µA
Operating Temperature:	-40°C ~ 85°C
Current - Output (Max):	600mA
Voltage - Supply:	2.3 V ~ 5.5 V
Series:	--
Features:	Auto Retry, Fault Timeout, Thermal Limit, Turn On Voltage, UVLO
Applications:	USB
Internal Switch(s):	Yes
Number of Channels:	2
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

Power management integrated circuits (PMICs) are responsible for providing power to electrical and electronic systems. The most popular PMICs are Hot Swap Controllers and the ISL61853FIRZ-T is one example of these. In this article, we will discuss the application field and working principle of the ISL61853FIRZ-T.

Application Field

The ISL61853FIRZ-T Hot Swap Controller can be used in a wide range of applications, from server farms to consumer electronics devices such as tablets, phones, and PCs. It is designed to help protect the device in a power-up sequence by controlling the inrush current, preventing over-current fault conditions, and managing power system sequencing. The ISL61853FIRZ-T Hot Swap Controller supports two load enable inputs, allowing it to be used in either dual redundant or NAND configurations. The NAND configuration is used in applications where the load needs to be powered on and powered off quickly and with minimum energy consumption. The dual redundant configuration is more suitable for high-availability applications. It allows two external controllers to simultaneously control the load.

Working Principle

In order to understand the working principle of the ISL61853FIRZ-T Hot Swap Controller, it is necessary to understand the basic principles of hot swapping. Hot swapping is a process by which electronic or electrical components are removed and replaced without disrupting the power supply or the device’s operation.The main function of the ISL61853FIRZ-T Hot Swap Controller is to ensure that the load is powered up in the safest, most efficient way. It does this by limiting the current drawn by the load during power-up and by providing a user-adjustable time-delay prior to power-up. In addition, the ISL61853FIRZ-T Hot Swap Controller provides over-current protection and power system sequencing.

Over-Current Protection

The ISL61853FIRZ-T Hot Swap Controller provides over-current protection during power up. It monitors the load’s current to detect over-current faults and will shut off the load if the fault is detected. This ensures that the load is not damaged or exposed to dangerous levels of current.

Power System Sequencing

Power system sequencing is a function of the ISL61853FIRZ-T Hot Swap Controller that ensures that the load is powering up and powering down in the correct order to prevent any dangerous events. The controller can sequence up to eight loads.

Conclusion

The ISL61853FIRZ-T Hot Swap Controller is an important tool for safely and efficiently powering up and powering down loads in a variety of applications. It provides over-current protection and power system sequencing to ensure that the load is powered up in the safest, most reliable way. With its two load enable inputs, it can be used in either dual redundant or NAND configurations, making it an ideal choice for high-availability applications.

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