ISL68200IRZ-T7A

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The ISL68200IRZ-T7A is a virtual remote sensing, Primary-Side Regulation (VSR) and Pulse Frequency Modulation (PFM) controller IC designed for use in high performance switching power supplies. With integrated loop compensation based on the current sensing voltage, the device can save valuable board space by eliminating the need for an external compensation network. This enables the design to achieve best-in-class performance with fewer components and a smaller overall system size. The ISL68200IRZ-T7A is especially ideal for applications that require high efficiency, low ripple, fast transient response, and high power density. It can be used in a variety of different application fields, such as cellular base stations, servers, industrial control systems, commercial IT products, and home networking devices.

Application Field

The ISL68200IRZ-T7A provides a wide range of application fields. It is suitable for boosting, inverting, and buck-boosting, as well as powering non-isolated step-down DC/DC converters. It is especially useful in applications with high power levels, since its 1MHz operating range helps to limit the size of the magnetics and improve efficiency. The device also features an integrated VSR loop compensation scheme, allowing it to achieve fast transient response while keeping magnetics, capacitors, and output ripple to a minimum. By taking advantage of the high frequency operating range, the part can be used in high power, high efficiency solutions, such as telecommunications base transceiver stations, solar power inverters, and industrial motor control systems.

Working Principle

The ISL68200IRZ-T7A operates on the Pulse Frequency Modulation (PFM) principle, which enables it to maintain high efficiency operation at different loads. When a load is connected to the output of the converter, the ISL68200IRZ-T7A compares the feedback voltage with its internal reference voltage. If the output voltage drops, the part will increase its pulse frequency to restore the voltage. Similarly, if the voltage rises, the part will reduce its pulse frequency to compensate. This allows the part to maintain stable output voltage despite varying load conditions. Additionally, the part also includes an integrated, low-ripple current sensing circuit that prevents output voltage overshoot or undershoot.

In addition to its PFM mode of operation, the ISL68200IRZ-T7A also features a Virtual Remote Sensing scheme that helps to improve line regulation. This feature allows the part to sense the voltage at the load and adjust its switching frequency accordingly, ensuring that the delivered voltage is properly regulated across line variations. The part also features peak current mode control, which helps to prevent output voltage undershoot during load transients.

Conclusion

The ISL68200IRZ-T7A is an ideal choice for high power switching applications. It offers a wide range of features, such as an integrated loop compensation circuit, a virtual remote sensing scheme, and peak current mode control. With its 1MHz operating range, the part is capable of achieving very high efficiency. In addition, the part also offers fast transient response and low output ripple. All these features make it perfectly suited for applications such as base transceiver stations, solar power inverters, and industrial motor control systems.

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