MP9928GF

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MP9928GF Application Field and Working Principle

MP9928GF voltage regulator is a DC-DC switching controller used in a wide range of applications. It features a high-efficiency current mode control with cycle-by-cycle current limiting and an internal 5.0V reference. The device is capable of delivering up to 2.0A of continuous output current. Internal soft-start reduces voltage overshoot during current limiting events. The MP9928GF is optimized to provide a simplified power supply design.Key features of the MP9928GF include programmable frequency and dead time controls, as well as ON/OFF control.

The MP9928GF DC-DC switching controller is used in various types of applications such as microprocessor-based systems, embedded power systems, automotive power systems and industrial power systems. Specifically, it supports applications like telecom, test and measurement and health care. In addition, the controller is suitable for use in portable products, high performance point-of-load modules and medical instrumentation products.

By virtue of its design, the MP9928GF offers a wide range of circuit programmable features. It allows the user to set a wide range of frequency and duty-cycle control parameters. For example, the frequency can be programmed between 50KHz and 1MHz. The duty cycle can be set between 0% and 100%. In addition, the controller provides a low-voltage current-burst drive mode to provide light-load efficiency.

At the heart of the MP9928GF, a unique current mode architecture provides a wide load range with improved line and load regulation. The controller also features a fast transient response and accurate output regulation over a reduced input range. This makes it ideal for use in switching voltage regulator designs and for tight regulation off-line ac-dc power supplies, such as those used in AC adapters and adapter/charger products.

The MP9928GF is also designed with an internal 5.0V reference threshold and an adjustable minimum operating voltage. The device’s current-mode regulation loop ensures fast transient response with good output voltage regulation over a wide input voltage range. The adjustable minimum operating voltage ensures accurate regulation for low-voltage input applications. In addition, the device supports inrush current limiting with a programmable soft-start time.

The device also features integrated system protection features like over-voltage protection (OVP) and under-voltage lockout (UVLO). The OVP sensing key enables users to adjust an over-voltage shut-down threshold over a range of 0.1V to 5.5V. The UVLO provides a simple way to enable or disable the output voltage based on a user-defined input voltage limit. The device also features a thermal shutdown feature to prevent it from operating beyond the limits of the operating temperature.

In summary, the MP9928GF switching controller is perfectly suited to a wide range of applications where it is required to provide adjustable frequency and duty-cycle control. Its wide range of programmable features and current mode architecture enable it to be used in switching voltage regulator designs, AC adapters, and portable devices with high line and load regulation. Its system protection features also ensure reliable power supply operations.

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