ISL91133IIM-EVZ

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The ISL91133IIM-EVZ is a programmable and adjustable stand-alone offline PFC controller in an easy-to-use and convenient board format. The device integrates high voltage, low shunt current, high IR and low RDSON components in a 1mm pitch advanced package technology. This innovative design provides excellent electrical characteristics without sacrificing the necessary design performance.

The ISL91133IIM-EVZ is designed for applications such as LED lighting, UPS systems, solar blade/or power distribution, emergency lighting, and battery operated power systems. The controller features a straightforward circuit design, combined with high integration and excellent thermal protection, offering a cost-effective solution for many commonly used applications.

The ISL91133IIM-EVZ is controlled by a PWM signal generated by an external controller. In operation, the PWM signal is fed into the on-chip pulse width modulation (PWM) logic, which is then used to control the output voltage. The PWM frequency and duty cycle can be adjusted by the user to optimize power output and efficiency of the system. The adjustable PWM frequency can also be used to regulate output current and protect the power system from overload.

The ISL91133IIM-EVZ also has an adjustable boost voltage regulation loop. This allows the user to maintain a constant output voltage regardless of fluctuations in the input voltage. This feature is useful in applications such as battery operated systems, where the input voltage may vary significantly with time.

The ISL91133IIM-EVZ uses a buck and boost topology. The boost circuit provides an adjustable voltage output, while the buck uses switched inductor technology to produce a constant output voltage. This topology provides excellent power density and high efficiency, making it an ideal solution for portable applications. The switching frequency can be adjusted by the user to optimize efficiency and performance.

The ISL91133IIM-EVZ also has an adjustable UVLO (Under Voltage Lock-out) threshold, which detects when the input voltage drops below a pre-set level, preventing the controller from overloading. This feature helps to protect the power system from over-current conditions.

The ISL91133IIM-EVZ is an ideal solution for a wide range of DC/DC and AC/DC (off-line) SMPS applications. It is an easy-to-use and convenient board format, which provides excellent electrical characteristics and excellent thermal protection. It is an adaptable and cost-effective solution for many common applications, and its adjustable PWM frequency and adjustable boost voltage regulation loop make it well suited to portable applications.

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