MP9942AGJ-P

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The MP9942AGJ-P is a DC-DC switch-mode battery charger. It is a highly integrated, low-cost solution for charging single-cell Li-ion or LiFePO4 batteries from a variety of input sources. It offers a wide input voltage range of 3V - 35V and high efficiency, thanks to its synchronous step-down design with integrated FETs. It also features low standby current, programmable output voltage, microcontroller interface, automatic power saving mode, and thermal shutdown protection.

Applications

The MP9942AGJ-P is suitable for applications that require a high-efficiency DC-DC switch-mode battery charger for single-cell Li-ion or LiFePO4 batteries. Typical applications include notebooks, ultrabooks, PDAs, personal digital assistants, and other portable devices with limited battery space. The wide input voltage range make it an ideal choice for charging from AC adapters, USB power supplies, or from solar panels.

Working Principle

The MP9942AGJ-P is a synchronous step-down switching regulator that utilizes two integrated FETs and an internal voltage reference. When the input voltage exceeds the set value, the MP9942AGJ-P switches on and steps down the regulated voltage to the set level. The regulated voltage is then monitored by the internal voltage reference, and any over-voltage occurrences are sensed and the switching frequency is automatically reduced to minimize current consumption. The device also features a low quiescent current mode, enabling it to achieve high efficiency and achieve a longer battery life.

The MP9942AGJ-P also features programmable output voltage, over-voltage protection, automatic power saving mode, and thermal shutdown protection. The programmable output voltage ensures that the output voltage level is maintained within the acceptable range, while the over-voltage protection prevents the unregulated voltage from exceeding the set level. The power saving mode allows the device to reduce its power consumption during low power loading for further energy savings. The thermal shutdown protection activates when the chip temperature exceeds a certain level, offering a safe and reliable operation.

Conclusion

The MP9942AGJ-P is a highly integrated DC-DC switch-mode battery charger, suitable for applications that require a wide input voltage range and high efficiency. It features programmable output voltage, over-voltage protection, automatic power saving mode, and thermal shutdown protection, making it an ideal solution for single-cell Li-ion and LiFePO4 batteries such as those found in portable devices. With its integrated FETs and low standby current, it is an excellent choice for efficient and reliable battery charging.

The specific data is subject to PDF, and the above content is for reference