OEM 19.5v 2.05a 40W for HP Notebook Charger

OEM 19.5v 2.05a 40W for HP Notebook Charger

• Construction of the power adapter:
  1. The function of a piezoresistor is that when the external voltage is too high, the resistance value of the piezoresistor rapidly becomes very small, and the fuse in series with the piezoresistor is blown out, thereby protecting other circuits from being burned out.
  2. Fuse, 2.5A/250V, when the current in the circuit is too large, the fuse will be blown to protect other components.
  3. Inductance coil (also known as choke coil), its main function is to reduce electromagnetic interference.
  4. Rectifying bridge, the specification is D3SB, the function is to change the 220V alternating current into direct current.
  5. The filter capacitor, with the size of 180 livf /400V, is used to filter out the alternating current ripple in dc, making the circuit work more reliably.
  6. Operational amplifier IC(integrated circuit), an important part of protection circuit and voltage regulation.
  7. Temperature probe, which is used to detect the internal temperature of the power adapter. When the temperature is higher than a certain set value (different brands of power adapters have slightly different temperature thresholds), the protection circuit will cut off the voltage output of the adapter, thus protecting the adapter from damage.
  

• 8. High-power switch tube, is one of the core components in the switching power supply, the switching power supply can work "on and off", the switch tube contributed.
  9. Switching transformer, one of the core components in switching power supply.
  10. Secondary rectifier tube, the function is to change the low voltage alternating current into low voltage direct current. In IBM power adapters, the rectifier is often operated by two large power units in parallel for a large current output.
  11. There are two secondary filter capacitors, 820 comforters / 25V, which filter out the ripple in low-voltage dc
  
  
• Shenzhen Waweis Technology Co., Ltd. is a high-tech enterprise engaged in r&d, production and sales of notebook adapters. Main: switch power supply, power adapter, charger, LED power supply and other products professional production and processing. The products have passed UL, CE, FCC, KC, PSE, SAA, GS and other certifications. The products produced by the company have perfect protection function, stable performance, safe and reliable. With professional r & d, production and sales experience, the company has accumulated strong technical advantages and rich market resources in the field of power adapters. The company is now able to provide a full range of alternative adapters for the world's major brands of notebook computers.

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