MP2613ER-LF-Z

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Modern electronic devices are becoming increasingly reliant on different sources of power. From powering up mobile phones, laptops, computers and automobiles, various batteries are used to store, manage and supply power for a range of applications. To ensure the reliable and safe operation of such devices, a battery charging circuit is employed. The MP2613ER-LF-Z from Monolithic Power is a complete, stand-alone synchronous buck regulator ideal for charging Li-Ion batteries in a variety of devices such as smartphones, tablets and medical equipment. It features monolithic integration of a buck converter, MOSFETs and a Li-Ion battery charging controller.

Applications

The MP2613ER-LF-Z is suitable for applications requiring high-current Li-Ion or LiFePO4 battery charging, such as smartphones, tablets, medical equipment, wearables, power tools and portable equipment. It offers a multiphase buck regulator for input voltages up to 20V, perfect for any USB PD application.

Features

The MP2613ER-LF-Z provides a number of advantages over other battery charging solutions. It includes a programmable switching frequency up to 1.5MHz, adjustable current limit, soft-start ramp rate, dynamic voltage scaling and current foldback operation in dropout and under-voltage lockout. Its synchronous topology also improves light-load efficiency and provides greater system accuracy and power delivery.

Safety features are also included, such as full cycle thermal shutdown protection and charge termination. It also features over-voltage protection and reverse-battery protection as well as current limit and thermal limit protection.

Working Principle

The MP2613ER-LF-Z follows the popular buck converter topology. A buck converter reduces a high DC voltage to a lower DC voltage with efficiency, low ripple and tight regulation. It is made up of four main parts: the input capacitor, the switching transistor, the inductor and the output capacitor.

In operation, the circuit works as follows: when the switch (In this case the MP2613ER-LF-Z) is closed, the current in the inductor builds up. This causes a voltage drop searching the inductor and the output capacitor. When the switch is opened, the inductor current continues to flow and it discharges into the output capacitor, thus maintaining the output voltage.

Conclusion

The MP2613ER-LF-Z integrates a complete stand-alone synchronous buck regulator for charging Li-Ion batteries safely and efficiently. It features a low voltage input range and adjustable current limit as well as a number of safety features to protect the system. This makes it ideal for a range of applications, such as smartphones, tablets and medical equipment.

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