Manufacturing iPhone - iPad Chargers in Vietnam - MyMy Technology

Manufacturing iPhone - iPad Chargers in Vietnam - MyMy Technology 

In modern electronic devices, EMI (Electromagnetic Interference)– also known as electromagnetic interference– is one of the factors that directly affects the efficiency of power transmission. When current passes through the charging circuit, components such as transformers, coils and rectifier circuits all generate magnetic fields. If not controlled, these interference pulses can reduce voltage stability, affect battery life or even cause device fire.

Therefore, in the process of manufacturing iPhone – iPad chargers,EMI shielding capacitors is a required component, helping filter out high frequency noise, ensuring clean, safe current when charging.

Working principle of EMI anti-interference capacitor in charger

EMI anti-interference capacitors operate on the principle of filter and cancel electromagnetic interference. When the AC current is charged into the charger, the rectifier components will convert it into direct current (DC). However, during this process, some noise signal still exists.
Anti-interference capacitors have the following tasks:

• Absorb excess energy caused by electromagnetic oscillations.
   
• Stabilize output voltage, helping the device receive a smoother and more stable power source.
   
• Protect other components like regulator IC, MOSFET, diode not overloaded.
   

In modern iPhone chargers, manufacturers often combineCapacitors Cx and Cy. Capacitor Cx is placed in parallel between the two AC power lines to eliminate in-phase noise, and capacitor Cy is connected between the circuit and the ground to filter out-of-phase noise. This combination helpsEnsure electromagnetic stability meets international EMC standards.

The role of anti-interference capacitors in charger durability

Not only protecting users from electric leakage or high voltage surges, EMI capacitors also directly affect charger life. If this component fails, the charger may generate heat, make a low noise, or cause interference with nearby devices such as Bluetooth speakers, TVs, or Wi-Fi.
At large factories such asMyMy Technology, the anti-interference capacitor testing process is strictly carried out by impedance meter and electronic oscilloscope, ensuring that each product meets the standardsNoise lower than 10dBµVaccording to IEC standards.

Classification of anti-interference capacitors used in iPhone - iPad chargers

Depending on the capacity and circuit design, common types of capacitors in chargers include:

• Polypropylene (PP) film capacitors: high stability, good heat resistance, often used at AC input.
   
• Ceramic capacitor: small size, placed near the regulator IC to suppress high frequency pulses.
   
• Electrolytic capacitor: energy storage, stabilizes output DC voltage.
   

MyMy Technology uses a combination ofPP capacitors resistant to heat 105°C and X7R ceramic capacitor to increase the ability to filter noise in hot, humid environments - common conditions in Vietnam and Southeast Asia.

EMI testing process in manufacturing plant

To meet export standards to demanding markets such as the EU and the US, each iPhone - iPad charger of MyMy Technology have to go throughelectromagnetic interference testingin an anechoic chamber.
The main steps include:

1. EMI spectrum measurement to determine the noise level generated during charging.
    
2. Check voltage stability under high temperature conditions of 60–80°C.
    
3. Cross-talk and leakage protection test between charging ports.
    

This process helps MyMy Technology ensure that each charger is stable operation, no interference with other devices, and simultaneously absolute safety protection for iPhone – iPad batteries.

Advantages of using a charger with standard EMI capacitors

Consumers often don't pay attention to this technical detail, but the difference betweenEMI standard charger and floating chargeris very large:

•  Fast charging is more stable, no interruption when the battery is almost full.
   
•  Reduce battery drain and increase iPhone – iPad battery life.
   
•  Does not interfere with Wi-Fi, Bluetooth, or wireless headphones.
   
•  Safer for long-term use, reducing the risk of fire.
   

Therefore, reputable OEM brands such as MyMy Technology always invest heavily inanti-interference circuit design, instead of just optimizing production costs.

Conclude

In the electronic accessories manufacturing industry, electromagnetic safety is increasingly important. With more than10 years of experience in the field of manufacturing iPhone - iPad charging cables and chargers MyMy Technology has become a pioneer in Vietnam application of European standard EMI anti-interference capacitors into all product lines.
Not only focusing on fast charging performance and high durability, MyMy also focuses onMicroelectronics quality, current testing and EMC, ensuring absolute safety for users and equipment.

If you are a business in needManufacturing, OEM, or distributing high quality iPhone - iPad chargers, MyMy Technology is a trusted choice – wheretechnology, standards and reputationconnected in every smallest component.

Manufacturing iPhone - iPad Chargers in Vietnam - MyMy Technology