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1MHz active clamp flyback chipset and the industry's first 6A three step-down battery charger

 (TI) (NASDAQ: TXN) recently launched several new power management chips, which can help designers improve the efficiency of personal electronic devices and handheld industrial equipment, and reduce the size of power and charger solutions.   
 The new chipset launched by TI combines the UCC28780 active clamp flyback controller and UCC24612 synchronous rectifier controller. The working frequency is as high as 1MHz, which helps to reduce the size of the power supply of the AC/DC adapter and USB PD charger. For battery powered electronic devices that need to maximize the charging efficiency in small size solutions, TI's new bq25910 6A three level buck battery charger can reduce the size of the solution by 60% in smart phones, tablet computers and electronic sales terminals (EPOS).           
TI high voltage power supply solutions vice president Steve Lambouses said: "consumers hope to achieve more rapid charging with smaller size, these new solutions can not only achieve this goal, but also enables the designer to achieve lower power consumption than before more function."           

To explore these new power management devices, understand other innovation, design and learning tool for engineers to provide TI, welcome to visit the application of Power Electronics Conference held in Sanantonio city in the United States Texas local time on March 4, 2018 to 8 (APEC) TI booth No. 501.

Active clamp flyback chipset conforms to modern efficiency standards           

UCC28780 supports both gallium nitride (GaN) and silicon (Si) FET, and advanced adaptive functions make the active clamp flyback topology meet the requirements of modern efficiency standards. The multimodal control based on input and output conditions is used to change operation. After matching UCC28780 with UCC24612, it can achieve high efficiency under full load and light load conditions. For more information,

 The power density is doubled. The chipset can run efficiently at the frequency of up to 1MHz. Compared with the current solution, the chip size can be reduced by 50%, and the power density will be higher.           

High efficiency: multimodal control can achieve up to 95% efficiency under full load condition. Standby power consumption is less than 40mW, exceeding CoC Tier 2 and DoE level VI energy efficiency standard. For the design above 75W, the engineer can also match the chipset with the new 6 pin power factor correction (PFC) controller UCC28056. The controller is optimized for light load efficiency and low standby power consumption, which is in line with the 61000-3-2 AC current harmonic limitation of the mandatory International Electrotechnical Commission (IEC).           

Simplified design: by using adaptive zero voltage switching (ZVS) control functions, engineers can easily design the system by combining resistance setting and self-tuning controller.           
Three stage depressor battery charger can achieve higher charging efficiency           

Using the innovative three stage power conversion technology, the bq25910 can significantly reduce the heat loss and increase the charging speed by 50% compared with the traditional architecture.

Small size solution: bq25910 integrates MOFSET and lossless current sensing function, which can reduce printed circuit board (PCB) space and allow designers to use small 0.33 H inductors, which saves more space.           
Faster charging speed: bq25910 can achieve 95% charging efficiency, and it can charge the standard smart phone battery from air to 70% in less than 30 minutes.           

Flexible system design: even if the battery is placed in the system charger, the differential battery voltage detection line can also quickly charge by bypass the parasitic resistance in PCB, providing more accurate voltage measurement.