NuVolta Launched Highest 100W Charge Pump IC - NU2205

­­­SHANGHAI,Aug. 24,2021 -- NuVoltaTechnologies,a leading provider of fast charging power ICs with world's highest charging power and highest efficiencies,today announced itssecond-generation charge pump fast charging IC -- NU2205,which is the first 100W charge pump fast charging IC in the whole industry. NU2205 is the leading fast charging IC for 2S battery with 4:2 charge pump fast charging architecture for ultra-fast charging applications in flagship smartphones and other mobile devices. The innovative 2S battery fast charging architecture enables the charging power from 60W to 120W,and further increasesto 200W.

1. The 2nd Gen Charge Pump Fast Charging IC

In the 5G era,the power consumption of smartphoneshas increased significantly,and the demand for fast charging has become much stronger. As we all know,the world'sfirst generation of fast charging IC was launched by TI in 2017,whichimproved smartphone charging from 10W to 30W,even 40W.However,the battery anxiety keeps increasing with more and more powerful APPs and games on our smartphone. It keeps pushing for higher charging power up to 60W,or even 120W to shorten the charging time and cool the charging temperature. 1S battery charging limitation becomes the bottleneckto push for higher charging power.NU2205 brings an innovative 2S battery charging architecture,which changes the charging solution fundamentally to meet the increased charging power.

With the launch of NU2205,NuVolta will provide mobile phone customers with a fast-charging solution of up to 200W.

2. Performance Advantages of Charge Pump ICNU2205

NU2205 utilizes an innovative 2S battery architecture to bring all-round advantages in power levels greater than 60W. The following are the experimental results of efficiency,temperature rise and current.

Higher Efficiency

High efficiency is the most critical parameter in fast charging applications. The NU2205 not only improves the work efficiency through the innovative internal structure,but can adjust the efficiency through the operating frequency. In Figure 1,under the 4:2 mode,the highest efficiency can reach 98%. Under the 10V ACDCadapter input,the charging efficiency of 2S battery in the 2:2 mode can reach up to 99.2%.

Temperature Rise Test Chart

As shown in Figure 2,under the conditions of 25°C ambient temperature and 16V input,when 2S batteriesare charged at 10A and 20A current,the temperature rise is 44.9°C/46.8°C respectively shown as follows.

Multi-mode

In addition to the 4:2 2S battery charge pump mode,NU2205 also supports 2:2 2S battery direct charging mode. In the 2:2 direct charging mode,the charging efficiency is as high as 99.2%. In high power charging application,it provides the possibility of pulse switching between 4:2 and 2:2 modes to reduce the system's heat. Due to the innovative design,NU2205 can also support both 2:1 and 1:1 1S battery fast charging modes.

3. Advantages of 2S Battery Architecture

NU2205 adopts NuVolta's2S battery 4:2 charge pump fast charging architecture,and it supports charging power up to 100W with single chip. What are the advantages of 2S battery charging?

3.1 The Breakthrough of 2S Battery Architecture

Along with OPPO launched the first generation of low-voltage high-current fast charging (VOOC) in 2014,the fast charging solution has dramatically changed the way of battery charging in smartphones. In 2017,the 1S battery charge pump solution was commercially available by TI,and the charging power exceeded 40W,50W and 60W in 1S battery charging. The current charges into the 1S battery have also increased from the initial 5A to 12A. That means when the battery's internal resistance is only 5mΩ,the power loss of battery exceeds 0.7W. The higher current brings more heat that induces huge challenges to the design of the battery protection board and the internal resistance of the battery cell.

Taking battery protection MOSFET as an example. Inorder to meet the application of fast charging and high current,the resistance of MOSFET has been reduced from 5mΩ to 1.1mΩ. Itmeans the battery protection MOSFET performance has approached the device limit. Therefore,the 1S battery fast charging encounters the charging power limitation.

In Figure 3,let's compare Generation One and Two on wireless charging history. The 2S battery fast charging solution doubles the battery voltage at the charging output terminal,reduces the current into the battery by half atthe same charging power,and reduces the battery's heat to 25%. In the same 60W charging power level,the current to the battery drops to 6A. When the battery pack'sinternal resistance keeps5mΩ,the power loss of the battery is significantly reduced to 180mW; When the current to battery keep 12A,2S battery fast charging can break through the charging power limit to 120W,or even 200W.

The second-generation charge pump fast charge IC- NU2205 adopts 4:2 charge pump architecture. This architecture and integrated FET have been optimized to achieve a 50% duty cycle. The architecture lowers downthe current of USB cable to half of charging current to battery,reducingthe loss of the charging cable and limitingthe temperature rise in the application. The two-phase architecture lowersdown the input capacitance requirements while improvingthe output voltage ripple.

As shown in Figure 4, the input 20V voltage is reduced by 50%at battery packs sideand the charging current of batteryis increased to12A current,which is twice of the input current. In light ofthe current doublestructure,the input current is limited to 6Athat canrealizehigh power transmission while no need to upgrade the charging cable,demonstrating advantages of the 2S battery architecture.

Furthermore,NU2205supports charging parallelly. WhentwoNU2205ICs are usedin parallel,the charge pump ICs will output 120W power. Whenthree NU2205 ICs arein parallel,the charging power exceeds200W.

4. Completed Safety Protections

In high-power charging applications,efficiency and heat are the most important considerations. However,in a charging system,besides efficiency,the most important consideration is charging safety. NU2205 integrates up to 34 levels of safety protections,such as protections of input and output voltage and current,battery voltage and current,and temperature,etc. That protects the system and prevents abnormal conditions damaging the battery and system. We care more about charging safety than you.

5. Offers both Wireless Charging and Wired Fast Charging Solutions

NuVolta'scompetitive advantage is also reflected in the existing leading wireless fast charging technology. Together with the world-leading wireless fastcharging solution,the newly launched 100W fast charging solutionenablesNuVolta to be a unique high-performance power semiconductor company with competed wireless and wired fastcharging solution.

Summary

NuVolta launched the second-generation charge pump fast charging IC,which aimsto empowersmartphone customers to solvethe problems of high-power consumption and heating during fast charging,and achieve the best charging efficiency in the industry. With excellent product quality,NuVolta has cooperated with many brand customers in fast charging projects. With the improvement of charging power and efficiency,NuVolta fast charging series products will help customers and greatly improve the charging experience of users.

About NuVolta Technologies

Founded in 2014 in Silicon Valley,NuVolta Technologies is the industry'sleading supplier of ICs and solutions. We are committed to providing high-performance power management ICs and power system solutions for Consumer Electronics,Automotive,Industrial and Healthcare.Our products cover wireless charging receiving and transmitting ICs,fast charging ICs,display power ICs and protection ICs. NuVolta has become a core supplier of international mainstream smartphonebrands and few mobile accessory manufacturers. Meanwhile,our one-stop power management solution has become primary choice of internationally renowned consumer electronics brands. For more information,please visit en.nuvoltatech.com,or send an email to sales@nuvoltatech.com for technical support.

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