ISL61853LIRZ

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):	1.5A
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:	Tube

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ISL61853LIRZ Application Field and Working Principle

The ISL61853LIRZ(hereafter referred to as the ISL61853) is a hot swap controller developed by Maxim Integrated, which offers significant protection and energy efficiency for a wide range of industrial and consumer applications. The ISL61853 is a PMIC (Power Management Integrated Circuit) that provides superior turn-on, inrush current and over-voltage protection for hot-swap loads. Its features and combination of programmable features give designers the flexibility to meet the specific requirements of their design.

Applications

Hot Swap applications are becoming increasingly important as the possible applications where application losses need to be protected increases. Hot Swap Controllers, like the ISL61853, provide protection to the load by monitoring and filtering the outputs when they are being turned on or off. The hot swap controller is especially important for telecom systems and those that use high power supplies.The ISL61853 provides the hot swap solution for modern power delivery subtended by an FPGA or other digital logic or microcontroller. It offers up to 8 channels of current shunt measurement and over-voltage protection that monitors the voltage of the load. The ISL61853 also has a high efficiency PWM/Synchronous Buck topology for minimizing power losses.Hot Swap applications are not limited to just telecom systems, however. The ISL61853 is suitable for a wide range of applications. These include, but are not limited to:-Data centers-Network switches-Disk and Solid State Drive (SSD) enclosures-Appliances and portable devices-Automotive, industrial and consumer applications

Features

The ISL61853 offers many features that makes it a reliable and versatile hot swap controller for a variety of applications. These include:-Over-voltage Protection: The ISL61853 monitors and filters the outputs when they are being turned on or off, maintaining voltage margins with hysteresis.-Inrush Current Prevention: The ISL61853 offers up to eight channels of current shunt monitoring and over-voltage protection that monitors the voltage of the load.-High Efficiency: The ISL61853\'s PWM/Synchronous buck topology minimizes power losses, allowing up to 95% efficiency where possible.-Soft Start: The ISL61853 provides soft start control to limit inrush current and ensure the safe power on and off of the load.-Undervoltage Protection: Undervoltage is detected and the hot swap controller is disabled to prevent any further damage. -Over-temperature and Over-current Protection: The hot swap controller can be programmed to protect against over-temperature and over-currents, ensuring the device and its applications are safe.-Fault Reporting: The hot swap controller can detect errors or faults and report them to the system, allowing it to react to the issue quickly.

Working Principle

The ISL61853LIRZ is a hot swap controller that offers superior turn-on, inrush current, and over-voltage protection for hot-swap loads. The hot swap controller maintains voltage margins with hysteresis and monitors the load output voltages and currents.The ISL61853 then monitors the load output voltages and currents and initiates a power-on or power-off sequence according to programmed thresholds. The outputs of the hot swap controller are then shut off in a controlled manner in order to prevent any potential damage to the load.When the load requires more current to start, the ISL61853 switches to a higher voltage and a soft start control is initiated. The hot swap controller then lowers the voltage in a gradual manner to prevent the system form inrush current. A fault is reported if an over-voltage or over-temperature situation is detected.

Conclusion

The ISL61853LIRZ is a PMIC (Power Management Integrated Circuit) specifically designed as a hot swap controller. It is especially useful for telecom systems as it provides superior turn-on, inrush current, and over-voltage protection for hot-swap loads, as well as for a variety of other applications such as those found in data centers, network switches, and appliances and portable devices.The ISL61853 has many features, including over-voltage protection, inrush current prevention, high efficiency PWM/synchronous Buck topology, soft start control, undervoltage protection, and over-temperature and over-current protection. Finally, the ISL61853 enables the fault reporting of errors and faults to the system.

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