ISL61863KIRZ-T

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The ISL61863KIRZ-T is a high-performance, single-channel hot-swap controller featuring an integrated MOSFET driver and a wide input voltage range. It is part of the Intersil Power Management Integrated Circuit (PMIC) family – specifically the Hot Swap Controllers category. This device effectively manages computer system hot-plugging events and prevents inrush currents or unstable system conditions during power on, power off, and fault conditions, as well as short-term over-currents. The ISL61863KIRZ-T offers better reliability and saves board space and cost compared to optocoupler and discrete solutions. This device also features fault reporting and hot-swap sequencing.

The ISL61863KIRZ-T’s Application FieldThe ISL61863KIRZ-T is an extremely versatile IC and has a variety of potential applications. The device can be used to manage the power to a range of computer systems, electronic devices, and circuit boards with active backplanes. In addition, the IC can be employed to safeguard power control and security systems, defense and aerospace applications, automotive engine management and navigation systems, industrial control systems, medical device applications, and home or office automation.

The ISL61863KIRZ-T’s Working Principle The ISL61863KIRZ-T is equipped with an on-board Under Voltage Lock Out (UVLO) alarm and a foldback current limiting circuitry. When the input voltage (VIN) falls below the UVLO threshold, the device latches off, preventing any further current draw. Once the VIN rises above the UVLO threshold, the device is re-enabled and normal operation continues. The device also has a Frequency Dependent Current Limiting (FDCL) feature, which monitors power system frequency and increases current limit as the frequency drops. This helps ensure system stability.

The integrated MOSFET driver can drive power MOSFETs up to 30A and is equipped with a gate drive range up to 30V for enhanced performance. The device also has a fixed over-voltage threshold of 17V and a variable over-temperature threshold of 105°C (typical) by using an external surface-mount NTC thermistor.

In order to effectively regulate power to an application, the ISL61863KIRZ-T utilizes a simple and effective sequential power-up and power-down control scheme. The device has two PVCC control pins - PWRON and PGOOD, which regulates power to an application based on its own fault reporting, as well as signals from the system microcontroller or power supply.

The PWRON pin signals the power is switched on when VIN falls below the UVLO threshold, and the PGOOD pin signals when the PVCC of the application is at the correct voltage. Both the PWRON and PGOOD pins have glitch detect features, which rapidly detect voltage fluctuations and initiate a power cycle. In addition, the ISL61863KIRZ-T also has an over-temperature lockout feature which shuts down the device when the temperature reaches a preset limit.

Overall, the ISL61863KIRZ-T is an effective solution for quickly and safely controlling power to a variety of applications. The device\'s integrated MOSFET driver, wide input voltage range, fault reporting, and hot-swap sequencing, coupled with its cost and space saving features make the ISL61863KIRZ-T the perfect choice for managing power in even the most demanding applications.

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