ISL61861HIBZ-T

ISL61861HIBZ-T application field and working principle

The ISL61861HIBZ-T is a power management integrated circuit (PMIC) designed for hot-swap control and redundancy application. Specifically, the ISL61861HIBZ-T provides hot-swap monitoring, hot-swap control, and node voltage monitoring for large, high-current systems. The hot-swap capability includes a configurable current limit and overvoltage protection, thus allowing the device to be used in a variety of application fields.

Application Fields

The ISL61861HIBZ-T is ideal for use in any system where hot-swap capability is necessary to prevent damage during power-on and power-off sequences. It can be used in telecommunications, data processing, server configurations and high density systems where a large number of components are connected together and require effective power management. It can also be used in distributed power architectures such as Point-of-Load (POL) and server systems that require redundancy and load balancing control.

The ISL61861HIBZ-T can be used in applications such as storage area network (SAN) systems, servers, switches, routers, base stations and media gateways to provide hot-swap power management. Other applications include fuses and switches, load balancing and current sensing, as well as PC motherboards and PC cards.

Working Principle

The ISL61861HIBZ-T is a power-management integrated circuit (PMIC) designed to provide a comprehensive hot-swap control function in a variety of applications. The device operates under two modes, dynamic hot-swap mode and redundancy mode. In dynamic hot-swap mode, the device can protect and manage a single hot-swap point from overcurrent, overvoltage and short circuit. In redundancy mode, the device can provide protection and manage multiple hot-swap points from overcurrent, overvoltage or short-circuit.

The ISL61861HIBZ-T provides a configurable output current limit. The device can be set to a fixed output current limit level, or it can be programmed to increase or decrease the output current limit based on a load current limit. The device also includes an adjustable overvoltage protection level that can be adjusted to prevent overvoltage conditions while preventing false overvoltage events.

In addition, the device includes a series of protection features that provide immunity against ESD and surges, reverse-current protection and temperature protection. The device is also protected against reverse-current through the integrated reverse-current limiters. These integrated features provide higher levels of protection compared to external versions.

The ISL61861HIBZ-T also provides a configurable node voltage monitoring feature that monitors the voltage level at critical points in a system. The device monitors the voltage level through a dual-threshold level and provides an alarm when the voltage level is outside of the acceptable level.

Finally, the ISL61861HIBZ-T supports a variety of communications protocols such as I2C, SMBus, SPI and PMBus for system monitoring and diagnostics. The I2C and SPI interfaces are designed for easy implementation in a variety of systems and provide low power consumption. The PMBus interface provides a standard interface to a variety of power management solutions.

Conclusion

The ISL61861HIBZ-T is a highly integrated PMIC device designed specifically for hot-swap control and redundancy applications. Its features include a configurable current limit, an adjustable overvoltage protection level, protection against ESD and surges, reverse-current protection and temperature protection. The device also provides a configurable node voltage monitoring feature and supports a variety of communications protocols. The ISL61861HIBZ-T is ideal for use in telecommunications, data processing, server configurations and high density systems that require effective power management.