NXP officially joined Quick Charge 2.0, following Power Integrations. In addition, power management integrated circuit (PMIC) manufacturer NXP will also publish a fast charging solution for mobile phones and tablets supporting Qualcomm Quick Charge 2.0 standard in the fourth quarter of this year. It hopes to catch up with mobile phone chargers and transformers with ultra-low standby power consumption and ideal charging efficiency, creating business opportunities.

        Zhang Xiliang, senior product marketing manager of NXP, points out that mobile devices with fast charging capability will be widely used next year.

        Zhang said that in recent years, the screen size and processor specifications of smartphones and tablets have greatly improved. Although it has brought more consuming experience to consumers, it has also accelerated the power consumption of mobile devices. Therefore, chargers and transformers manufacturers in the field of appliances are working hard to develop fast charging solutions to support Quick Charge 2.0 standards, while power chipmakers are introducing ultra-low standby power consumption and high charging efficiency products to respond to market demand.

        Zhang further pointed out that nowadays, the design of power transformer and charger for mobile devices often accompanies multiple universal serial bus (USB) connectors. For example, 90 W/19 V transformers are often equipped with one or two 5-volt USB interfaces, while 10.5 W/5-volt chargers have as many as four USB interfaces. Moreover, the power density of both transformers and chargers must be greatly increased, and manufacturers need to provide higher power charging function in smaller product volumes.

        In fact, the pressure of power scheme manufacturers comes not only from the expectations of consumers, but also from the increasingly stringent provisions of global environmental regulations on standby power consumption and charging efficiency of transformers. Taking the Code of Conduct (CoC) developed by the European Commission as an example, starting in January 2014, 49-250 watts of charging products will be required to meet the average efficiency of 89% in the active mode, and at least 79% of the charging efficiency will be maintained at 10% of the load. In addition, CoC also stipulates that standby power consumption of 90-watt transformers should be reduced from 0.21 to 0.15 watts in 2016.

        Zhang said that in order to assist customers in introducing products conforming to environmental regulations, NXP will introduce Flyback controllers for 15-65 W transformers and Primary Sense plus external bipolar transistor (Bipolar Transistor) for chargers or transformers less than 12.5 W at the end of the fourth quarter of this year, which meet Quick Charge 2.0 standard.

        Because NXP strives to reduce the transmission loss and switching loss of the above fast charging scheme, the former can operate efficiently with less than 30 mW standby power consumption and 90-91% efficiency, while the latter can provide less than 10 mW standby power consumption and more than 82% efficiency for mobile charge.