The best choice for portable product power supply - Fujitsu Semiconductor MB39C326

Urban white-collar workers lead a fast-paced life and have a lot of work pressure. Thanks to the wide variety of portable products such as smart phones, tablets, e-readers, etc., white-collar workers can improve their working conditions and enrich their spare time. An ultra-thin, power-saving, and stylish portable product always makes you love it and makes your friends envious. For these portable products, "small size" and "low power consumption" are the two most critical indicators. These indicators are also increasingly demanding for power chips for portable products. Fujitsu Semiconductor's buck-boost DC/DC converter MB39C326 can fully meet these requirements, especially the ability to dynamically control the output voltage through DAC signals and support APT and ET functions.

　　Fujitsu Semiconductor's MB39C326 buck-boost DC/DC converter can reduce the size of the RF amplifier, inductor, and PCB board on portable products, thereby reducing the size of the portable product as a whole. The MB39C326 product switches at a frequency of 6MHz, allowing the use of smaller inductors than conventional products in portable products while reducing the PCB area of ​​the power supply circuit by half.

　　It is worth mentioning that Fujitsu Semiconductor's MB39C326 buck-boost DC/DC converter is a high-efficiency, low-noise synchronous buck/boost DC/DC converter designed and developed for mobile devices using a single lithium-ion battery. It integrates APT (Average Power Tracking) and ET (Envelope tracking) functions into the PA front stage, greatly reducing the power consumption of the entire device. The MB39C326's APT function adjusts its own output according to the size of the portable product PA power, changes the PA input power, and increases the PA efficiency to a fixed high level, helping the PA save about 40% of power consumption. The MB39C326 has a unique PFM function built in. The PWM mode and PFM/PWM automatic switching mode can be selected through the mode terminal. In the PFM/PWM automatic switching mode, it works in PFM mode when the load is light, and automatically switches to PWM mode when the load increases. This function can be used to work efficiently in the full load range. The MB39C326 can extend the battery life by increasing the output voltage level.

　　MB39C326 power chip internal block diagram

　　Fujitsu Semiconductor has been committed to implementing solutions based on APT and ET, and has a clear roadmap and a strong technical support team in promoting power management solutions for industrial electronics and consumer electronics. Currently, there are large R&D and technical support teams in Shanghai and Chengdu. Fujitsu Semiconductor believes that the importance of these power management technologies in smartphones will continue to increase, which will help the company take full advantage of its comprehensive leadership in power amplifiers and RF power management, and expand excellent power management chip solutions suitable for power supply voltages for portable products, digital TVs, game consoles, HDD recorders, etc.

　　For engineers, in addition to choosing excellent buck-boost DC/DC converters to complete the development and design of "small size" and "low power" portable products, they also need leading power management IC online design simulation tools. Fujitsu Semiconductor's power management IC online design simulation tool Easy DesignSim can help save time in the design process of portable power supplies. This tool can automatically calculate the main power supply parameters such as I/O voltage, load current, power efficiency and switching frequency, and then simulate the action of the power supply online. Engineers then only need to observe the corresponding reactions generated by the simulation in the circuit diagram when changing the operating conditions and external device parameters. After selecting a power management solution, engineers can also use EasyDesignSim to generate a bill of materials (BOM) that meets project requirements and circuit diagrams from the supplier's electronic component database, and can choose to output it as a Microsoft Excel or Adobe PDF document. Engineer friends use MB39C326 buck-boost DC/DC converters in portable product power products, and use Fujitsu Semiconductor's Easy DesignSim, which is really like adding wings to a tiger and getting twice the result with half the effort.