Compared with the radical strategy of digital chips that constantly pursue new processes and processes to achieve higher performance and seize the frontier market, analog chips often use mature manufacturing processes and maintain a small market growth for a long time, which is somewhat tepid. . In recent years, with the sudden emergence of IoT applications, under the calm blue ocean on the surface, the market pattern of analog chips is surging and changing quietly. Taking power chips, an important branch of analog chips, as an example, according to statistics, out of the top 60 power chip manufacturers, there are more than 30 Chinese companies. Although the market share of Chinese power chip manufacturers is still at a disadvantage, the overall shipments are rising every year. It is not difficult to find that the cake of IoT applications continues to grow. The most typical increment is the TWS headset products that must be shipped in hundreds of millions per year!

In TWS applications, in addition to important functions such as human-computer interaction, sound quality, and noise reduction, there is also a challenge that cannot be ignored - battery life. Limited by the size of the TWS headset, the built-in battery capacity of the headset is destined to become a short board. Then, under the premise that the single battery life of the earphone cannot be improved, the solution given by the industry is to improve the efficiency of the earphone charging, which is why the TWS charging bin gradually adds the fast charging function, and effectively promotes the breakthrough and innovation of the power management chip. !

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The TWS market is entering a period of continuous growth,

Local chip manufacturers open up a new track for PMIC

The power management chip (PMIC for short) is the power supply heart of electronic equipment and plays a vital role in TWS applications. For example, the earphone compartment PMIC has two main functions: one is responsible for charging the battery inside the charging compartment, and the other is responsible for boosting the output of the battery inside the charging compartment and charging the earphones quickly. In addition, the real-time safety protection function also needs to rely on the PMIC to prevent the built-in lithium battery from overcharging, overdischarging, overcurrent, and short circuit.

Relevant data shows that in 2020, the global brand TWS headset shipments will be about 250 million pairs. It is estimated that by 2024, the global brand TWS headset shipments will reach 551 million pairs, with a compound annual growth rate of 19.8%; The quantity is "only more and less". This means that PMIC shipments will also match it, reaching the order of hundreds of millions of units per year, and maintaining unsaturated market demand in the next few years. At the same time, Chinese chip manufacturers are actively flocking to the PMIC track, and it is expected that the latecomers will catch up and compete head-to-head with international manufacturers in the TWS market.

Figure 1: 2019-2024 Global Brand TWS Headphone Shipment Forecast

Zhaoyi's innovative new power management chip - GD30WS8805 series has achieved further breakthroughs in high efficiency and high integration. This series of chips has ultra-low quiescent current. In sleep mode, the current consumption is less than 5μA; it supports a maximum charging current of 1.2A for the battery and a maximum charging current for the earphones of 600mA; using switching charging, the BOOST conversion efficiency reaches 95%. Industry-leading level and lower heat loss; coupled with the industry's mainstream Arm® Cortex®-M23 series GD32E230 series entry-level MCUs, it can provide a complete TWS headset charging compartment power management solution.

Watch the full GD30WS8805 review,

Learn about the superior performance of Zhaoyi's innovative PMIC products!

 

GigaDevice,

Decrypt the pivotal power management chip #PMIC in TWS earphones, and see how Chuangxin Circuit can leverage the hundreds of millions of markets [celebration][celebration][celebration] Please come out #Zhaoyi innovative PMIC chip GD30WS8805: fast charging, low power consumption , high efficiency, high integration... Layout TWS, opening a new prelude to Zhaoyi's innovative "digital + analog" strategy

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PMIC also involute? Each program competes,

A lot of fast charging, low power consumption, and high integration

This new GD30WS8805 power management chip has the characteristics of low power consumption and high efficiency, which helps to increase the service life of the earphone battery. Generally speaking, the loss of TWS earphone battery mainly occurs in the charging process. At this time, the internal circuit boosts the voltage through the boost converter to achieve the purpose of charging. Therefore, choosing a low-power boost converter can effectively reduce battery loss and prolong battery life; GD30WS8805 has the advantage of low static power consumption, making it the preferred choice for market competitiveness. Of course, the factors that affect the battery life are the number of charging cycles, the use environment, the material of the battery, etc. Zhaoyi Innovation is also actively working with partners to explore technical methods to reduce the battery loss of earphones.

Figure 2: The physical map of Zhaoyi's GD30WS8805-EVAL full-featured development board, U1 is the PMIC

At the same time, with the development and iteration of TWS applications, not only human-computer interaction, high-definition sound quality, active noise reduction and other functions have become more complete, but also the integration of power management chips has become higher and higher, and charging management two-in-one has gradually appeared. One, three-in-one, and even six-in-one power solutions, not to mention fast charging, wireless charging and other technologies are constantly being included.

For example, Zhaoyi's innovative power management chip GD30WS8805 integrates six functions such as charging, discharging, communication, protection, earphone detection, and LDO. In terms of charging management, it can supply power to the battery of the charging box, the battery of the earphone and the MCU to realize the three-in-one charging management. It can also cooperate with the GD32 MCU to freely configure the constant current charging current and constant current charging jump voltage during the charging process through the I2C bus. and other parameters to realize intelligent control of TWS power management system. It is worth mentioning that the built-in LDO of GD30WS8805 can provide 50mA, 3.3V power supply for external circuits without additional components, thus reducing the overall cost of the solution, which is a very rare practice in the industry, so it has won the TWS industry Widespread attention from customers, some leading customers in the industry have begun to import and achieve mass production.

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MCU+PMIC,

TWS Blue Ocean opens a new prelude to GigaDevice's innovative "digital + analog" strategy

Compared with purchasing power management chips separately, OEMs and ODMs in the downstream of the industry chain tend to prefer a one-stop power management solution, which can reduce the cost of research and development and accelerate the time to market of products. For this type of customer demand, Zhaoyi Innovation has simultaneously launched the "MCU+PMIC" TWS power management platform framework, based on the advantages of the widely used MCU product line, combined with the actual needs of customers, formed A new, market-competitive one-stop solution.

The GD32E230F-TWS board shown in the figure below is a power management development platform mainly promoted by Zhaoyi Innovation. The development board uses the GD32E230F4V6 chip with the Cortex®-M23 core as the main control MCU, and communicates with the PMIC GD30WS8805 through the I2C interface to realize the charge and discharge management of the single-cell lithium battery and the headset. Not every original factory can provide this type of packaging solution, and it also tests the R&D capabilities of the original factory. At the same time, the selection of the main control MCU is also very flexible. According to the needs of different customers, MCUs with different performance, price, number of pins, and sizes can be selected. Zhaoyi Innovation itself has a very rich MCU product line for customers to choose. Customers can freely combine to realize various high-performance and low-cost TWS application solutions.

Figure 3: GigaDevice launches GD32E230F-TWS solution

In the above scheme, the power management chip GD30WS8805 has three modes, namely USB mode, BAT mode and Sleep mode. When the USB is inserted, the earphone is inserted, and the charging is completed, the corresponding bits of the internal register will change, and an interrupt pulse will be issued at the same time, allowing the MCU to read the changed value of the register and perform corresponding charge and discharge management. In USB mode, the solution can charge the lithium battery of the charging box and the lithium battery of the headset at the same time, and the charging of the headset takes priority. The two earphones have independent two-way charging circuits, which can charge one earphone separately. In addition, GD30WS8805 also has a variety of protection and detection functions, such as battery overvoltage, overcurrent, overtemperature protection, earphone overvoltage, overcurrent protection, USB insertion and extraction detection, earphone insertion and extraction detection, etc. .

Figure 4: Schematic diagram of the working mode of the power management chip GD30WS8805

At present, the power management chip GD30WS8805 has successfully entered the market and has been shipped in batches; and Zhaoyi's innovative next-generation PMIC products are also continuing to develop in the TWS market, which will further improve the charging current. Breakthrough, accelerate the popularization of the fast charging function of the headphone compartment; and further reduce the package size, which is suitable for portable development needs. There is no doubt that Zhaoyi Innovation is expanding the application territory of the IoT field. In the diversified layout of MCU, storage and sensing, it will further explore the innovation of analog chips such as power supply and signal chain, so as to form the excellent competitiveness of a broad product portfolio!

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