ISL61851FCBZ-T

PMIC - Hot Swap Controllers: ISL61851FCBZ-T Application Field and Working Principle

The ISL61851FCBZ-T is an advanced high performance power management integrated circuit (PMIC) designed for hot swap (HS) applications. It features an advanced adaptive on-time control loop to minimize output voltage overshoot and undershoot during current step load transients and an adjustable cycle-by-cycle current limit for improved protection and performance in current limiting circuits. The ISL61851FCBZ-T includes an analog current comparator and voltage reference which is used to provide precise over-current and over-voltage protection by sensing the input current and output voltage of the Hot Swap application. The Analog current comparator works in conjunction with the overvoltage protection (OVP) logic circuit to provide robust overvoltage protection and overcurrent protection for Hot Swap applications.

The ISL61851FCBZ-T integrates several key features to enable robust HS applications. A low W enable logic circuit with an enable turn on time of 6 us is included to enable low logic level active-low enable input and prevent Hot Swap applications from seeing long enable transitions. The control and protection logic also provides a configurable sense power limit, hysteresis, slew rate limitation and Open DRAIN enable output capability to ensure proper Hot Swap functionality. The adjustable overvoltage threshold can be configured to meet a wide range of system requirements.

The ISL61851FCBZ-T is a highly integrated solution for Hot Swap applications in the communication, computing and storage industries. It is designed to provide a consistent, reliable and cost-effective solution for hot swap operational reliability and performance through the integration of control and protection logic. The ISL61851FCBZ-T also offers functional safety features such as overvoltage and overcurrent protection, adjustable overvoltage limits, and adjustable sense power limit.

The ISL61851FCBZ-T is designed for hot-plugging applications in communication, computing and storage applications. It provides consistent and reliable performance by controlling the output voltage and current during insertion and removal of the load. The hot-plugging control and protection logic is designed to ensure proper Hot Swap functionality and protection through the use of adjustable sense power limit, over-voltage protection (OVP), and over-current protection. The ISL61851FCBZ-T also includes slew rate and enable delay circuitry to ensure low voltage transition during load insertion and removal.

The adjustable output voltage and current limit of the ISL61851FCBZ-T are used to ensure safe and reliable operation of the Hot Swap application. The adjustable output voltage and current limit enable the device to be used in any Hot Swap application which requires precise output voltage and current regulation. The ISL61851FCBZ-T offers a wide operating temperature range of -40°C to +105°C and offers a wide input voltage range of 4.5 V to 28 V.

The ISL61851FCBZ-T is a highly integrated solution for hot swap applications. It features on-time control loop, adjustable current limit, overvoltage protection, low logic level active-low enable input, adjustable hysteresis, slew rate limitation, and Open DRAIN enable output. By providing a comprehensive set of features for hot swap applications, the ISL61851FCBZ-T helps to ensure robust operational reliability and performance.