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Ac Dc Adapter

DESKTOP POWER ADAPTER, find quality DESKTOP POWER ADAPTER products,DESKTOP POWER ADAPTER Manufacturers, DESKTOP POWER ADAPTER Suppliers and Exporters at Andar Technology.Ac Dc Adapter

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How To Fix AC DC Adapter？

Repairing an AC DC adapter can be a challenging and potentially dangerous task, especially if you're not experienced with electrical repairs. It's important to note that opening and attempting to repair an AC DC adapter can be hazardous due to the risk of electric shock and could invalidate any warranty on the device. However, if you have the necessary skills and take appropriate safety precautions, here are general steps to diagnose and possibly fix an AC DC adapter:

1. Safety First: 

Unplug the AC DC adapter from both the power outlet and the device it powers. 

Be aware that capacitors inside the AC DC adapter can store charge even after it is unplugged.

2. Visual Inspection: 

Identify the Problem: Look for obvious signs of physical damage such as loose or disconnected wires, blown capacitors, bent or broken pins on the connectors, cracked or discolored components, or signs of overheating.

Look for any loose or exposed wires.

3. Check the Power Cord: 

Inspect the power cord for any breaks or damage. 

If the cord is damaged, it may be possible to replace it if it's detachable. If not, the entire AC DC adapter may need replacement.

Check the Cable and Connector: Often, the problem lies in the cable or connector. The cable can break internally due to excessive flexing, usually at the end of the rubber cable guard[4]. The connector pin can also be bent or broken[14]. If the cable or connector is the issue, you may need to replace it[8][13].

4. Test with a Multimeter: 

Use a multimeter to test the voltage output of the AC DC adapter. 

Compare the reading to the output specifications printed on the AC DC adapter. If there’s no voltage or the voltage is significantly off, there could be an internal problem.

5. Opening the AC DC adapter: 

If there are screws, remove them. Some adapters are glued or ultrasonically welded, making them difficult to open without damage.

Be extremely careful not to damage the internal components.

6. Internal Inspection: 

Once open, look for obvious signs of damage like burnt components, bulging or leaking capacitors.

Check solder joints, especially those that are subjected to mechanical stress.

7. Testing Components: 

Test individual components like capacitors, diodes, and resistors with a multimeter.

  Replace Faulty Components: If you identify a faulty component such as a blown capacitor or a broken switch, you can replace it. However, this requires some knowledge of electronics and soldering skills[

8. Re-soldering: 

If a loose connection is found, re-solder it carefully.

9. Reassembly and Testing: 

Once any necessary repairs are made, carefully reassemble the AC DC adapter.

Test it again with the multimeter before using it with the device and test it again to see if the problem has been resolve.

10. Consider Replacement: 

If you’re not able to find and fix the problem, or if the AC DC adapter seems unsafe (like damaged PCB tracks or severe component damage), it’s best to replace the adapter.

Remember, safety should be your primary concern when working with electrical devices. Always unplug the adapter before inspecting or repairing it. If you're not comfortable or experienced in handling electronic repairs, consider seeking help from a professional or replacing the adapter entirely. It's also worth noting that some AC DC adapters are sealed and not designed to be opened or repaired, in which case replacement is the only option.

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What is PD charger？

What is charger protocol？

The charger protocol typically involves a negotiation process between the device and the charger, where the device sends a request for a certain charging voltage and current, and the charger responds with the available options. The device then selects the optimal charging parameters based on its battery capacity, charging speed requirements, and other factors.

In the fast charging protocol, when the protocol does not match, it will be backwards compatible with low-power charging. This is why when we use different fast chargers to charge our phones some of them charge very slowly.

Types of fast charging protocols

Quick Charge (Qualcomm)

Quick Charge is a fastcharging technology developed by Qualcomm for mobile devices. It uses a higher voltage to charge the battery faster, and it is compatible with devices that use Snapdragon processors.

Power Delivery (USB-PD)

Power Delivery is a fast charging technology developed by the USB Implementers Forum (USB-IF). It uses a higher wattage to charge the battery faster, and it is compatible with devices that use USB Type-C ports.

SuperVOOC (OPPO)

SuperVOOC is a fast charging technology developed by OPPO for their smartphones. It uses a higher voltage to charge the battery faster, and it is currently one of the fastest charging protocols available.

Adaptive Fast Charging (Samsung)

Adaptive Fast Charging is a fast charging technology developed by Samsung for their smartphones. It uses a higher voltage to charge the battery faster, and it is compatible with devices that use Qualcomm processors.

Dash Charge (OnePlus)

Dash Charge is a fast charging technology developed by OnePlus for their smartphones. It uses a higher voltage to charge the battery faster, and it is compatible with devices that use Qualcomm processors.

VOOC (OPPO)

VOOC is a fast charging technology developed by OPPO for their smartphones. It uses a higher current to charge the battery faster, and it is compatible with devices that use VOOC-enabled chargers.

USB PD (Apple)

USB-PD is a fast charging specification developed by USB-IF, which is one of the mainstream fast charging protocols at present. USB-PD fast charging protocol is output through Type-C interface.

These fast charging protocols vary in their charging speed, compatibility, and availability, but they all aim to reduce the time it takes to charge electronic devices.

USB PD is one of the mainstream fast-charging protocols

A PD (Power Delivery) charger is a type of charger that uses the USB Type-C port to deliver higher power output than standard USB chargers. PD chargers use a special protocol to communicate with the device being charged and negotiate the appropriate voltage and current for charging.

This means that a single PD charger can be used to charge a variety of devices, from smartphones to laptops.

For example, PD chargers can deliver high power output to quickly charge the power bank, which can then be used to charge other devices on the go.

PD chargers are also used in charging other USB-C enabled devices such as cameras, gaming consoles, and even some electric vehicles. When a PD charger is connected to a device that supports PD charging, the charger sends a negotiation request to the device to determine its power requirements. The device responds with its power requirements, and the charger adjusts its output voltage and current to match.

USB connections have been primarily used for data transfer between devices, but USB PD enables USB to also be used for charging devices such as smartphones, laptops, tablets, and other electronic devices. This is achieved by allowing for higher voltage and current to be delivered over the USB connection. In addition, USB PD allows for bidirectional power delivery, meaning that devices can both send and receive power over a single USB connection.

In 2021, USB Promoter Group Announces USB Power Delivery Specification Revision 3.1. USB PD breaks the 100-watt limit, this extends the applicability of USB PD to a large number of applications where 100W wasn’t adequate. For more details about PD Charger, PD CHARGER Manufacturer and China Desktop Power AdapterBrowse our website https://www.andar-sz.com/.

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GaNSense half-bridge gallium nitride power chips, the next step in the high-frequency power electronics revolution

prefaced

Navitas, a next-generation power semiconductor company and industry leader in gallium nitride power chips, launched GaNSense's half-bridge gallium nitride power chip on September 7, 2022. Compared with the existing discrete scheme, the half-bridge power chip can achieve MHz switching frequency, which will effectively reduce the system loss and complexity.

The Nano NV624X half-bridge gallium Nitride power chip integrates two GaN FETs and drivers, as well as control, level switching, sensing and protection functions, creating an easy-to-use system building block for electronic components. The revolutionary monolithic solution effectively reduces the number and layout of components by 60% compared to the discrete solution, thereby reducing system cost, size, weight and complexity

The Nano-NV624X half-bridge gallium Nitride power chip integrates GaNSense technology to enable unprecedented automatic protection, increased system reliability and stability, and combined with nondestructive electrical testing to achieve even higher levels of efficiency and energy savings.

The high level of integration of the Nanogansense half-bridge gallium nitride power chip solves the problems of circuit parasitization and latency, enabling a wide range of AC-DC power topologies including LLC resonance, asymmetric half-bridge (AHB), and active clamp flyback (ACF) to operate at MHz frequencies. GaNSense's half-bridge gallium nitride power chip is also ideal for totem pole PFC and other motor drive applications

The Nanogansense half-bridge gallium nitride power chip is expected to have a significant impact on all of Nanogansense's target markets, including mobile fast charging for mobile phones, consumer electronics power supplies, data center power supplies, solar inverters, energy storage, and electric vehicle applications.

"In the late 70s and early 80s, the bipolar transistor was replaced by silicon MosFETs," said Gene Sheridan, CEO and co-founder of Nano Semiconductor. The advent of Nano semiconductor gallium nitride technology represents the second power revolution -- the switching frequency and efficiency are greatly improved, and the system size and cost are greatly reduced. Our early GaNFast gallium nitride power chips have made the leap from 50-60 KHZ to 200-500 KHZ, and today the GaNSense half-bridge chip takes these advantages to the MHz level. The gallium nitride revolution continues!"

Satisfied micro early generation of gallium nitride power chip GaNSense half bridge series products, including the NV6247 (2 x 160 m Ω), rated voltage of 650 v. And NV6245C (2×275mΩ); Both are packaged in an industry standard, thin, low inductance 6x8mm PQFN package.

The NV6247 will enter mass production immediately with a delivery cycle of 16 weeks.Samples of the NV6245C are currently being shipped to select customers and mass production is expected to begin for all customers in the fourth quarter of 2022. The company will launch GaNSense half-bridge gallium nitride chips in additional packages and power levels over the next few quarters.

Summary:

The NV624x GaNFast half-bridge power chip, which uses GaNSense technology, is a next-generation product that integrates two GaN FETs and actuators, as well as control, level switching, sensing, and protection functions. It can be used for 100 to 300W applications in mobile, consumer, and industrial markets.

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