Slkor's technical team comes from Tsinghua University. The company is a national high-tech enterprise that developed silicon carbide power devices early on and has grown into a company integrating R&D, design, sales, and application technical services, with an inclusive, open, and innovative corporate culture. The "SLKOR" brand has gained international recognition and reputation, with continuously increasing market share, and has obtained ISO9001, RoHS, REACH, California 65, and other certifications. Slkor has R&D institutions in Beijing and Suzhou, and its Shenzhen headquarters includes a laboratory and central warehouse. The main products include three major series: diodes and transistors, power devices, and power management chips. New products such as Hall sensors, ADCs, BMS, high-speed optocouplers, and crystal oscillators are gradually being introduced. These products are used in smartphones, laptops, robots, power tools, telematics, 3C digital products, AIoT, and other industries, cooperating with more than 10,000 global partners! "Slkor Micro Chips Driven Future". Slkor's official website has been built into a platform for semiconductor peers to learn and exchange ideas, creating an industrial ecosystem in cyberspace to serve the company's operation and development. The company's vision is that after 30 years of unremitting efforts, colleagues will make Slkor a "leading enterprise in the semiconductor industry"! 1.1 Name: Slkor DW03 Lithium Battery Protection Application Solution 1.2 Application: Single-cell lithium-ion battery pack; lithium polymer battery pack 2. The chip comes in a SOT23-5 package. 2.1 Product Features The DW03 product is a highly integrated solution for protecting single-cell lithium-ion/lithium polymer rechargeable battery packs. The DW03 includes an advanced power MOSFET, high-precision voltage detection circuits, and delay circuits. The DW03 provides all necessary battery protection functions such as overcharge, over-discharge, overcurrent, and short circuit, with very low power consumption during operation. This chip is not only designed for mobile phones but is also suitable for all kinds of information products that require lithium-ion or lithium polymer rechargeable batteries for long-term power supply. 2.2 The DW03 monitors battery voltage and current, and protects a single-cell rechargeable lithium battery from damage due to overcharge voltage, over-discharge voltage, overcharge current, over-discharge current, and short circuit by disconnecting the charger or load. The system has a simple external circuit. The MOSFET is built-in, with a typical equivalent resistance of 65mΩ. 3.1 Charger detection; 0V battery charging function; internally set delay time; high-precision voltage detection. 3.2 Low quiescent current: Normal operating current: 2.8uA; Standby current: 1.5uA; RoHS and lead-free compliant. 4. Slkor DW03 Lithium Battery Protection Application in Electric Shaver Solution: Figure 1 Figure 2 Figure 3 Application Principle Slkor single-cell lithium battery protection DW03. The DW03 includes an advanced power MOSFET, high-precision voltage detection circuits, and delay circuits, and is widely used in small household appliances. In the shaver application circuit shown in the figure, USB Type-C supplies power to charge the single-cell lithium battery. During charging, the MCU's ADC I/O port collects the charging voltage and displays the battery level on a digital tube. The charging circuit is built with Slkor SL4056 charging management and simple peripheral circuits. In the motor drive section, Slkor 3400 MOSFET is used, and the MCU I/O port collects key signals to control the motor on/off. DRV is the gate drive signal. When the MCU detects that the key is pressed, DRV outputs a high level and the shaver starts to rotate. 5.1 Figure 1 is only a reference circuit for the MCU to collect lithium battery charging. Note that the DW03 connects to the positive terminal of the lithium battery through a 100R resistor, pin 2 of the chip connects to the negative terminal of the lithium battery, and pins 4 and 5 connect to GND. Users can follow the specifications to design and easily build a corresponding single-cell lithium-ion battery protection circuit. The DW03 protects a single-cell rechargeable lithium battery from damage due to overcharge voltage, over-discharge voltage, overcharge current, over-discharge current, and short circuit. If no abnormal conditions are detected, the output transistor remains on, and charging and discharging can switch freely. This is called normal operation mode. During normal discharging, when the battery voltage drops below the over-discharge detection voltage (VDL) and the duration reaches or exceeds the over-discharge voltage detection delay time (TDL), the DW03 disconnects the battery from the load and stops discharging. This is called over-discharge voltage condition. In normal operation mode, when the discharge current is equal to or higher than the set value (VM voltage is equal to or higher than the overcurrent detection voltage) and the duration reaches the over-discharge current detection delay time, the DW03 turns off the discharge FET and stops discharging. This is called over-discharge current condition. During normal charging, if the VM voltage drops below the charge detection voltage (VCHA) and the duration exceeds the overcharge current detection delay time (TCU), the DW03 turns off the charge FET and stops charging. This is called abnormal charge current detection, etc. 5.2 In Figure 2, the bidirectional TVS for surge protection is Slkor SMF5.0CA, with VRWM voltage of 5.0V and excellent clamping capability, with a peak pulse power capability of 200W under 10/1000 µs waveform. Q2 and Q4 are both Slkor MOSFETs. The MCU enable signal controls Q2 to turn on Q4, and after Q4 conducts, Type-C outputs voltage VCC to power the load. 5.3 In Figure 3, D4 and D5 mainly serve as a battery and Type-C power switching circuit. When the charger is unplugged, the lithium battery supplies power. D4 and D5 are Slkor 1N5819WT Schottky diodes, with reverse leakage current of 1uA, voltage rating of 40V, maximum forward current of 1A, and low forward voltage drop, making them very suitable for low-current applications such as MCUs. 6. Slkor DW03 Lithium Battery Protection Application BOM Table Information is as follows: Slkor Semiconductor provides end customers and distributors with convenient access to new products under the "Slkor" brand, strengthens technical support services for customers, and offers detailed product information. Please consult our staff for more details.

On May 16, 2026, Song Yuanming, International Director of Kinghelm/Slkor, was invited to speak at the Huaqiang Lecture. Centering on the theme "The Path to Global Branding for Domestic Brands," he shared practical experience in globalizing Chinese semiconductor brands with fellow professionals in the electronic components industry. Drawing on Kinghelm and Slkor's recent explorations and achievements in overseas markets, he systematically deconstructed how domestic brands can break through from "being seen" to "being chosen," from building a digital marketing matrix to listing on international platforms. Song Yuanming, International Director of Kinghelm/Slkor Global Strategy: From "Passive Involution" to "Proactive Breakthrough" During his speech, Song Yuanming pointed out that the domestic electronic components market is facing intensified homogeneous competition, with price wars continuously squeezing profit margins, making going global an imperative choice. At the same time, the evaluation criteria of overseas customers are also changing: technical capability, delivery stability, and brand credibility are gaining more importance. Engineers and procurement personnel increasingly prefer to find suppliers through Google, Bing search, and industry platforms. "Whoever is seen first and appears more professional gets more inquiries and orders." Based on this insight, Kinghelm and Slkor have systematically built an overseas digital marketing matrix in recent years, gradually developing a global path of "search → inquiry → sampling → repeat purchase." Song Yuanming sharing SEO and GEO optimization Four Core Levers to Build an Overseas Marketing Closed Loop Song Yuanming summarized overseas marketing into four core stages, forming a complete closed loop from traffic to orders. Kinghelm and Slkor's Four-Step Overseas Marketing Approach Independent Website Construction. Kinghelm and Slkor have completed the setup of their English independent websites, covering key modules such as brand positioning, certifications, product parameters, Datasheet downloads, inquiry portals, and sample requests. Song emphasized: "The official website is not just an e-business card, but a business front desk that continuously receives traffic, retains customers, and drives inquiry conversion." SEO and GEO Optimization. Song Yuanming showed live Google indexing data: to date, the Kinghelm brand keyword has 521,000 indexed entries, while the Slkor brand keyword has as many as 15,000,000 indexed entries. "SEO helps customers find us on search engines; GEO helps customers see us in large model answers – this is the next key strategic high ground for our brand's customer acquisition." Press Release & Content Marketing. Kinghelm and Slkor continuously produce high-quality content on industry media, tech blogs, LinkedIn, and other platforms, achieving both enhanced brand credibility and SEO backlink building. Currently, a full matrix on TikTok, YouTube, Douyin, Weibo, Xiaohongshu, and LinkedIn has been completed. Slkor has 24,500 followers on TikTok, 150,000 likes and 45,000 followers on Douyin, demonstrating the phased success of their promotional matrix. Listing on International Platforms. Being listed on platforms like DigiKey, Mouser, Element14, Supplyframe, and Corestaff is the "entry ticket" for domestic brands to enter the global supply chain. Citing DigiKey backend data, Song showed that Slkor's diodes, transistors, sensors, power management ICs, optocouplers, and other categories have seen continuously rising order volumes from July 2024 to April 2026, exceeding 1,700 orders in April 2026. Slkor's order volume trend on the DigiKey platform This approach has been validated in the practice of Kinghelm and Slkor. Song Yuanming concluded: "The internet-based globalization of domestic electronic component brands is not just about promotion. It is centered on the independent website, uses SEO, GEO, and content as growth engines, relies on a promotional matrix for traffic entry and trust endorsement, and uses platform listings as order amplifiers." In his view, platforms bring exposure, the website carries the brand, and content builds trust – only when these three work together can long-term repeat purchases be formed. Song Yuanming showing Google indexing volumes for Kinghelm and Slkor The achievements of the Kinghelm and Slkor brands in going global are inseparable from the "daring to venture, innovative, tenacious, and pragmatic" Huaqiangbei culture advocated by Mr. Song Shiqiang. This sharing event provided a stage for Kinghelm and Slkor to showcase their overseas practical achievements, convey brand value, and exchange ideas with peers. In his concluding remarks, Song Yuanming invited more peers to join the development of Kinghelm and Slkor, working together for the internationalization of domestic brands! Mutual learning and exchange Company Profile: Core technical members of Kinghelm and Slkor come from Tsinghua University and the University of Electronic Science and Technology of China, and also include many overseas returnees. Kinghelm has been deeply involved in microwave RF technology for nearly 20 years. Its central laboratory in Shenzhen is well-equipped, capable of independently completing new product R&D and testing. Its production base in Luzhai County, Guangxi Province, is equipped with intelligent production lines, enabling mass product delivery. Products include Beidou/GPS antennas, Bluetooth and WiFi antennas, and a series of RF jumper cables; signal connectors, board-to-board connectors, board-end sockets and connectors, switch series products; and customized medical and automotive wiring harnesses, non-standard probes and connector development, as well as drawing, mold opening, testing, mass production and other supporting services. "Slkor, move the future with heart." Slkor treats colleagues and peers sincerely, continuously driving the company and industry development with new materials, technologies, products, and service models. Slkor's main products include TVS diodes, transistors, MOSFETs, IGBTs and other power devices; power management ICs, etc. It has also launched new products such as Hall sensors, BMS, high-speed optocouplers, and passive crystals. Mr. Song Shiqiang founded Shenzhen Kinghelm Electronics Co., Ltd. and Shenzhen Slkor Micro Semicon Co., Ltd. in Huaqiangbei. The companies have always adhered to the corporate culture of "integrity, diligence, tenacity, and attention to detail," as well as the corporate ethics of fairness, openness, cooperation, and win-win, enabling steady development. Kinghelm and Slkor have now grown into globally influential and reputable brands, providing products and supporting technical services to more than 40,000 customers worldwide.