Wireless charging PCBA OEM: supporting wireless power supply experience with manufacturing precision

　　In the wave of popularization of wireless charging technology, the demand for wireless charging PCBA (printed circuit board assembly) of various terminals, from mobile phones, headphones to smart home devices, has shown explosive growth. Wireless charging PCBA OEM (original equipment manufacturing) service is centered on large-scale production capacity, strict quality control and deep supply chain integration, becoming the key support for brand owners to transform design solutions into stable mass-produced products, especially adapting to the needs of customers who already have mature design solutions and need to achieve efficient large-scale delivery.

　　1. OEM core advantage: ensuring product landing efficiency with mass production capacity

　　(I) Full power range production adaptation

　　Wireless charging PCBA needs to cover the full range of scenarios from low power to high power. OEM manufacturers achieve stable mass production of multiple power ranges through standardized production lines and process optimization:

　　Consumer electronics level: supports 5W (Qi standard basic version), 10W (Samsung fast charging), 15W (Qi EPP standard) mobile phone/earphone charging PCBA, using highly integrated dedicated chips (such as TI BQ51013, Dialog DA4100), and the production yield is stable at more than 99.5%;

　　Medium and high power level: adapt to 30W (tablets) and 65W (laptops) PCBA, by optimizing the coil drive circuit and heat dissipation design, ensure that the chip temperature is ≤85℃ during continuous charging, and meet the reliability requirements of fast charging scenarios;

　　Industrial customization: for special scenarios such as in-vehicle wireless charging (15W~45W), it can produce tolerance - The PCBA has a wide temperature range of 40℃~85℃ and has passed the AEC-Q100 automotive certification test to adapt to the harsh environment of automotive electronics.

　　(II) Strict quality control system

　　The safety and stability of wireless charging PCBA directly affect the user experience. OEM services ensure product quality through full-process testing:

　　Electrical performance test: Each PCBA must pass the withstand voltage test (AC 3000V, 1 minute without breakdown), insulation resistance test (≥100MΩ), charging efficiency test (≥75% under Qi standard), and key parameters are recorded and archived;

　　Electromagnetic compatibility (EMC) test: Before mass production, pass FCC Part 15, CE EMC and other certification tests to ensure that the radiation interference is ≤40dBμV/m (30MHz~1GHz) to avoid signal interference with mobile phones and other devices;

　　Reliability verification: Randomly select 1% of mass-produced products for 1000 charge and discharge cycle tests and 85℃/85% RH humidity test (500 hours), and the functional attenuation rate is ≤5% to ensure long-term stability.

　　(III) Supply Chain Collaboration and Cost Optimization

　　Original equipment manufacturers can reduce production costs for customers by relying on large-scale procurement and supply chain management capabilities:

　　Material Integration: Establish long-term cooperation with mainstream chip manufacturers (TI, NXP, Renesas) and coil suppliers (Sunlord Electronics, Maxtech) to ensure the stable supply of core materials (such as wireless charging chips and high-frequency capacitors), and shorten the delivery cycle to 7~10 days;

　　Process Optimization: Adopt automated SMT production lines (chip accuracy ±0.03mm) and selective wave soldering processes to reduce manual operation errors, and reduce unit energy consumption through lean production. The comprehensive production cost is reduced by 10%~15% compared with small batch production;

　　Flexible Delivery: Supports mixed orders of multiple batches, small batches (1000~5000 units) and large batches (more than 100,000 units), with a minimum order quantity (MOQ) as low as 500 units, meeting the flexible needs of brand owners for trial production and mass production.

　　2. Technical features: production guarantee for wireless charging scenarios

　　(I) Coil drive and efficiency optimization

　　The core of wireless charging PCBA is the coil drive circuit. OEM production needs to accurately control key parameters:

　　Resonant frequency control: high-precision SMD components (ceramic capacitors with a tolerance of ±1%) are used to ensure that the resonant frequency is stable at 110kHz~205kHz (Qi standard range) to avoid efficiency loss caused by frequency deviation (efficiency loss ≤2% when the frequency deviation is ±5kHz);

　　Dynamic power regulation: For PCBAs that support the Qi 1.2.4 standard, the response speed (≤100ms) of automatically adjusting the output power (5W~15W seamless switching) according to the needs of the receiving end needs needs to be verified during production to ensure compatibility with different brands of equipment.

　　(II) Production implementation of safety functions

　　The safety of wireless charging depends on the stable operation of the hardware circuit, and the OEM process needs to focus on the following:

　　Foreign object detection (FOD): By calibrating the current sampling resistor on the PCBA (accuracy ±0.5%), ensure that metal foreign objects ≥5g (such as keys, coins) can be detected, and the power supply will be stopped within 0.5 seconds, and the surface temperature is ≤60℃;

　　Overtemperature/overcurrent protection: During production, the trigger threshold of the protection circuit needs to be tested piece by piece (overtemperature protection 65℃±5℃, overcurrent protection 2A±0.2A) to ensure that the output is quickly cut off under abnormal conditions to avoid equipment damage.

　　(III) Structural and heat dissipation adaptation

　　In response to the form requirements of different terminals, PCBA production needs to take into account both miniaturization and heat dissipation:

　　Ultra-thin design: Adopt 4-layer PCB (thickness 0.8mm~1.2mm), support integrated bonding of coil and PCBA, and adapt to ultra-thin wireless charging plates with a thickness of ≤5mm (such as mobile phone back clip charger);

　　Heat dissipation enhancement: For high-power PCBA above 30W, by selectively coating thermal conductive silicone grease (thickness 50μm±10μm) and optimizing the grounding layer design, the thermal resistance is controlled within 2℃/W, ensuring that the core chip temperature is ≤80℃ during continuous operation.

　　3. OEM service process: precise execution from design to mass production

　　(I) Design file reception and review

　　File confirmation: Receive Gerber files, BOM lists, and test specifications provided by customers, conduct DFM (Design for Manufacturability) analysis, check whether the number of PCB layers, component packaging, and pad size meet the mass production requirements, and output the "Manufacturability Analysis Report";

　　Standard alignment: clarify customer requirements for certification (such as Qi certification, CE, FCC), reliability (such as vibration and impact testing), and formulate targeted production and testing plans.

　　(II) Trial production and verification

　　First piece production: Produce 3~5 first pieces according to customer design, conduct full-function testing (charging efficiency, FOD, protection function) and dimensional inspection (key dimensional tolerance ±0.1mm), and provide the "First Article Inspection Report" (FAI);

　　Customer confirmation: Adjust production parameters (such as solder paste thickness, reflow temperature curve) according to customer feedback until the first piece fully meets the design requirements and locks the production process.

　　(III) Batch production and delivery

　　Complete set of materials: Purchase materials according to the BOM list and conduct IQC (incoming material inspection). Key chips need to provide original certification reports to ensure material compliance;

　　Automated production: Use SMT production line (equipped with SPI solder paste detection and AOI optical detection) to achieve patch, use ICT online test to detect circuit connectivity, and FT functional test to verify charging performance. The defect rate is controlled within 0.5%;

　　Packaging and delivery: Use anti-static packaging (each PCBA has an independent anti-static bag), provide batch test reports and material traceability information, support multiple delivery methods such as sea and air transportation, and batch delivery cycle ≤10 days.

　　4. Typical application scenarios

　　(I) Consumer electronics accessories

　　15W wireless charging board PCBA manufactured for mobile phone brands:

　　Adapt to Qi standard, support fast charging of Apple and Android phones, pass Qi certified interoperability test during production, ensure compatibility with more than 95% mainstream models;

　　1 million units in batch production, 99.6% yield, 8 days delivery cycle, help customers respond quickly to market demand.

　　(II) Smart home integration

　　5W wireless charging PCBA manufactured for smart desk lamp manufacturers:

　　Integrated in the desk lamp base, it needs to meet ultra-thin design (PCB thickness 1.0mm) and low noise (fan less design), focus on controlling EMC radiation (≤30dBμV/m) during production to avoid interfering with the dimming function of the desk lamp;

　　Flexible production supports customers' multiple batches of small batch orders (5,000 units per batch), shortening the delivery cycle to 7 days.

　　(III) In-car wireless charging

　　15W in-car wireless charging PCBA manufactured for automotive parts manufacturers:

　　Meet AEC-Q100 Grade 2 automotive regulations (operating temperature - 40℃~105℃), pass 1000 hours of high temperature aging test and vibration test (10Hz~2000Hz, 10g acceleration) during production;

　　Cooperate with customers to complete automotive certification, provide complete test data and traceability documents, and ensure vehicle installation reliability.

　　5. Comparison with ODM: Focus on the value positioning of production

　　Dimensions Wireless Charging PCBA OEM Wireless Charging PCBA ODM

　　Core capabilities Large-scale production, quality control, supply chain design and development, customized solution development

　　Customer demand adaptation Customers already have mature designs, and customers who need mass production need to develop products from 0 to 1

　　Cycle advantages Short trial production cycle (7~10 days) Long design cycle (30~45 days)

　　Cost structure relies on scale effect to reduce production costs Including design costs, the unit price is relatively high

　　This positioning makes wireless charging PCBA OEM particularly suitable for brands with independent design teams, pursuing mass production efficiency and cost control, especially in consumer electronics, smart home and other fields with fast iterations and large demand, which can quickly transform designs into market products.

　　Conclusion

　　Wireless charging PCBA OEM services focus on "mass production accuracy, stable quality, and efficient delivery". By deeply focusing on the manufacturing link, it provides brands with seamless connection from design to mass production. As wireless charging technology is rapidly becoming popular, its value lies not only in lowering the production threshold, but also in ensuring the performance consistency and safety of each PCBA through standardized and large-scale production, becoming the "manufacturing cornerstone" that supports the large-scale implementation of wireless charging products.