ISL61853FIRZ

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ISL61853FIRZ, an off-the-shelf Integrated Hot Swap Controller, is seen as an integrated component developed to provide total Hot Swap solution for reliable power system design, from the point of start-up and steady state control to over temperature and overcurrent protection. It is a perfect component for intensive Hot Swap applications, bringing users utmost design flexibility, such as unids and boards, hot swap protection in different levels, such as individual peripherals and wall panels, as well as isolated and non-isolated applications.

The broad spectrum of innovative and unique features of the ISL61853FIRZ makes it distinct and a popular choice among power supply designers, ranging from industrial and consumer to medical and networking applications. As a Hot Swap Controller, it provides control and protection functions required in most scenarios like ICs, modules, and blue LEDs. Designers may utilize its internal 15V ccm MOSFET to implement Hot Swap protection, such as overcurrent, overvoltage, and over temperature protection.

The working principle of ISL61853FIRZ is quite simple. The circuit comprises of two independent sections, a power path controller, and a digital control unit. The power path controller combines a 6A MOSFET, driver circuit and shunt with diagnostic capabilities to execute Hot Swap control. It enables the system to condition the power supply to the load before enabling the connection. The digital control unit on the ISL61853FIRZ ties everything together and further allow designers to configure various protection strategies.

The core function of this embodiment is the patented soft start technology. Soft start commands the IPM to disable its MOSFET and simply build up the power supply voltage to the load, through internal 9ms/V slow voltage ramping, before switching of the load power. This effectively prevents an inrush current during the load power up, while offers a measure of protection against shorts, overload and overvoltage conditions. Other protection strategies are further enabled by configuring other protection parameters such as current threshold setting.

In addition to providing protection strategies, designers can also make the most of a number of unique features, such as forcing the output voltage to follow a 7-bit setting code stored in the EEPROM, digital edge detection and delay. On top of that, ISL61853FIRZ supports an extremely wide variety of supply voltage, from 3V to 28V, making it much more versatile for various application needs.

As an integrated hot swap controller, the ISL61853FIRZ implements an array of protection and control functions for digital ICs, modules, and blue LEDs with up to 28V supply. With features well-suited for a range of industries from industrial and consumer to medical and networking, ISL61853FIRZ has been a great enabling technology for reliable power system design.

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