What is a PD charger? Why do we have to do sealing?

With the continuous increase in power consumption of electronic devices, “fast charging” has become a standard configuration for mobile phones, tablets, and laptops. One of the core technologies supporting fast charging is the PD charger (Power Delivery Charger).What is a PD charger? Firstly, let’s understand what PD on the charger means. PD stands for Power Delivery. PD charger (Power Delivery charger) is a fast charging solution that uses USB technology to provide higher power, thereby providing faster and safer charging for various devices including smartphones, tablets, and laptops. It allows devices to communicate with chargers to ensure optimal power transmission and adjust according to the needs of each device, thereby achieving more efficient charging.Compared to traditional chargers, PD chargers have:Higher power: Supports up to 240W, suitable for simultaneous charging of laptops and mobile phones;Intelligent regulation: can automatically match voltage and current according to device requirements;Strong universality: Type-C interface is universal on the front line.However, high power means higher heat generation, component density, and safety requirements, which naturally increases the difficulty of manufacturing.Why do PD chargers need to be sealed?Sealing is a crucial step in the production process of PD chargers. The so-called encapsulation refers to pouring specialized adhesive into the charger to provide comprehensive protection for electronic components.The functions of sealing include:Insulation protection: prevent ignition and short circuit between high-voltage components;Thermal conduction and heat dissipation: quickly conduct heat, extend lifespan;Moisture proof and waterproof: prevent moisture and dust from causing failure;Mechanical protection: anti vibration, anti loosening, and improves overall reliability.For PD fast charging products that pursue high safety and long lifespan, encapsulation is almost standard.Recommended solution: SIPA 8250-15For the sealing requirements of PD chargers, we recommend using SIPA 8250-15 two-component epoxy sealing material:High hardness: After curing, a strong protective layer is formed, which is wear-resistant and compressive;Excellent liquidity: capable of penetrating…