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About Topdiode

Is your company ISO certified?

Yes, Topdiode complies with ISO9001:2015.

Is your product RoHS, REACH compliant?

Yes, Topdiode products are RoHS, REACH compliant. Topdiode has long history with overseas market, thus all products can meet European and US standard.

Are you manufacturer?

Yes. Topdiode is a manufacturer since 1995. Topdiode also have OEM products in order to meet customers’ various requirement.

What is your competitors?

Topdiode’s competitors are tier one brand: Onsemi, Infineon, Texas, Diotec, NXP…etc

What is Topdiode’s market position?

Topdiode offer alternative semiconductors ICs with much competitive prices, shorter lead time and similar quality, compare with tier one semiconductor brands like Onsemi, Infineon, Texas, Diotec, NXP.

Sales Questions

What is your MOQ?

Normally our MOQ is about 10Kpcs. For samples order or trial order, we accept 1 reel.

Do you have minimum order value (MOV)?

  Our Minimum order value is 1000USD. If less than 1000USD, we will charge customer handling charge.

Do you have stock?

Yes we have stock for some regular items or high runner items. If you need stock, pls check with our sales case by case.

What is your lead-time?

We keep stock MOSFET, IGBT, Drive IC, transistors. Production time is 4 weeks around.

What is your Shipment Term?

Ex-work Dongguan warehouse, FCA HK or FOB HK upon request, and depends on order amount.

Do you offer samples?

Yes we offer free samples. For very potential customers, we also support customer samples for pilot run.

Can you provide alternative proposal base on customer Part Number?

Yes we have engineering team to do pin to pin cross base on customer Part Number.

What is your payment term for new customer?

We require payment via TT transfer. For new customer, we need to receive deposit and balance before delivery.

Can we become a Topdiode distributor or sales rep?

Yes, we look for distributors and sales rep in some area, please contact sales director at sales@topdiode.com

Do you have customer protection policy for distributors?

Yes we do have. Topdiode offer 100% protection to our sales representative and distributors.

After Purchase Questions

How to avoid quality issue before buying?
  1. Professional sales and engineer team will quote customer the right alternative and mark clearly any difference offer.
  2. Sales will always check the application for each inquiry and try to help customer avoid potential problem.
  3. Engineers can help customer for design in.
  4. Samples and trial order will help customer avoid problem.
What is your warranty?

Warranty 1 year from production code.

Topdiode will never escape the responsibility for any quality issue.

Even after 1 year, Topdiode will still take responsibility of any quality issue.

Will you offer 8D report?

Topdiode quality team will offer 8D report within 1 week after study the samples.

How do you handle quality issue?

Topdiode will solve the quality issue with customer based on exact situation. Normal solutions like: refund, free Replacement, help customer select the right parts if any misuse of components, help customer for right soldering.

Who will take in charge of quality issue?

As engineers do not speak English normally, sales manager and the related sales will response customers. If necessary, sales and engineers can meet with customers by video call.

Product Questions

What is Audio Amplifier IC?

An audio amplifier IC, also known as an integrated circuit, is a small electronic device that amplifies low-power audio signals to a higher power level suitable for driving speakers or headphones.
It combines various components such as transistors, resistors, and capacitors into a single chip, making it compact and efficient. Audio amplifier ICs are commonly used in consumer electronics like smartphones, laptops, televisions, and audio systems to enhance the sound quality and volume output.

How an Audio Amplifier IC Works?

It works by taking in an input signal and increasing its amplitude while maintaining the same waveform shape. The basic operation of an audio amplifier IC involves several stages.

First, the input signal is received and passed through a pre-amplification stage where it undergoes initial amplification. This stage helps boost the weak incoming signal to a more usable level.

Next, the amplified signal goes through various processing stages such as filtering and equalization to enhance specific frequency ranges or remove unwanted noise. These stages help improve the overall sound quality before further amplification.
After processing, the signal enters the main amplification stage where it receives significant gain in power. This stage utilizes transistors or other active components within the IC to increase both voltage and current levels of the audio signal.

Finally, once fully amplified, the output from this main stage is sent to drive speakers or headphones directly. The amplified audio signals are then converted back into sound waves by these devices for us to hear. It’s important to note that different types of audio amplifier ICs exist with varying features and capabilities depending on their intended applications (e.g., stereo systems, mobile phones). However, they all follow similar principles of receiving an input signal, amplifying it at multiple stages while preserving its fidelity and finally delivering high-powered output for listening purposes.

What are Features of Audio Amplifier IC?

1. High power output: It can provide sufficient power to drive speakers and produce loud sound.

2. Low distortion: The IC ensures minimal distortion in the amplified audio signal, resulting in high-quality sound reproduction.

3. Wide frequency response: It is capable of amplifying a wide range of frequencies, allowing for accurate reproduction of different types of audio signals.

4. Small size and compact design: Audio amplifier ICs are often designed to be small and space-efficient, making them suitable for various applications where size is a constraint.

5. Efficient power consumption: These ICs are designed to consume less power while delivering optimal performance, making them energy-efficient.

6. Built-in protection mechanisms: Many audio amplifier ICs come with built-in protection circuits that safeguard against overvoltage, overheating, short circuits, etc., ensuring the longevity and reliability of the device.

What are Applications of Audio Amplifier IC?

The applications of audio amplifier ICs are quite diverse. They are commonly used in various electronic devices and systems to amplify audio signals. Some common applications include:

1. Consumer Electronics: Audio amplifier ICs are widely used in devices such as smartphones, tablets, laptops, televisions, and home theater systems to enhance the sound quality.

2. Automotive Industry: These ICs play a crucial role in car audio systems by amplifying the low-power signals from radios or media players to produce high-quality sound through speakers.

3. Public Address Systems: Audio amplifiers find extensive use in public address systems for events, conferences, concerts, and other gatherings where clear and amplified sound is required.

4. Musical Instruments: Amplifier ICs are utilized in musical instruments like guitars, keyboards, and synthesizers to boost the weak electrical signals produced by these instruments for better audibility.

5. Professional Audio Equipment: In professional settings such as recording studios or live performances venues, audio amplifier ICs are employed to drive loudspeakers or studio monitors with high fidelity output.

6. Communication Systems: These ICs also have applications in communication equipment like two-way radios or intercom systems where they amplify voice signals for effective communication.

What is IGBT?

IGBT stands for insulated-gate bipolar transistor. It is a power transistor that combines an input MOS and an output bipolar transistor.

How an IGBT Works?

Here’s a brief explanation of how an IGBT works:

1. Basics: An IGBT is made up of two main components – a P-type semiconductor and N-type semiconductor. These semiconductors are made of materials such as silicon, and they are joined together to form a p-n junction, which is the basic structure of a diode.

2. Gate: The gate of an IGBT is an electrode that is used to control the flow of current between the p-type and n-type semiconductors. It is insulated from the rest of the device by a layer of Aluminum oxide or Silicon nitride, which prevents leakage current and ensures that the device operates only when the gate signal is applied.

3. Bipolar: The term “bipolar” refers to the fact that the IGBT can conduct both positive and negative currents, unlike a uni-polar device such as a MOSFET, which can only conduct positive current. This allows the IGBT to handle higher power levels and operate more efficiently in certain applications.

4. Operation: When the gate signal is applied, the IGBT is turned on, and current can flow between the p-type and n-type semiconductors. The amount of current that flows depends on the voltage applied to the gate and the resistance of the load connected to the IGBT. When the gate signal is removed, the IGBT is turned off, and no current can flow.

What are Features of IGBT?

Some of the key features of IGBT include:

1. High voltage and current handling capabilities: IGBTs can handle high voltage and current levels, making them suitable for use in high power applications. They can switch and control large amounts of power, making them an excellent choice for use in electric vehicles, solar inverters, and wind turbines, among other applications.

2. Fast switching speed: IGBTs can switch on and off very quickly, which allows them to be used in high-speed applications such as power converters and motor controllers. Their fast switching speed also helps to reduce energy losses and improve overall system efficiency.

3. Low conduction losses: IGBTs have low conduction losses, which makes them more energy-efficient than other types of power semiconductor devices. This feature is particularly important in applications where the device is required to conduct high currents for extended periods of time.

4. High efficiency: IGBTs can achieve high efficiency levels in power conversion and control applications due to their low losses and fast switching speed. This feature is beneficial in applications where energy efficiency is a critical concern, such as in electric vehicles and solar inverters.

5. Compact size: IGBTs have a smaller physical size compared to other types of power semiconductor devices, making them more suitable for use in compact and space-constrained applications. This feature is particularly important in applications such as aerospace, military, and transportation, where size and weight are critical factors.

What are Applications of IGBT?

1. Power electronics: IGBTs are commonly used in power electronics devices such as power supplies, motor controllers, and solar inverters.

2. Renewable energy: IGBTs are used in wind turbines and solar panels to convert DC power to AC power.

3. Traction applications: IGBTs are used in electric vehicles and trains to control the power flow and convert DC power to AC power.

4. Industrial automation: IGBTs are used in industrial automation equipment such as conveyor systems, robotics, and CNC machines.

5. Home appliances: IGBTs are used in various home appliances such as refrigerators, washing machines, and air conditioners.

6. Telecommunications: IGBTs are used in telecommunication equipment such as power amplifiers and base stations.

7. Medical equipment: IGBTs are used in medical equipment such as X-ray machines and surgical lasers.

8. Transportation: IGBTs are used in transportation systems such as elevators and escalators.

9. Defense and aerospace: IGBTs are used in defense and aerospace applications such as missile guidance systems and satellite power systems.

10. Alternative energy: IGBTs are used in alternative energy systems such as fuel cells and energy storage systems. IGBTs are versatile devices that are used in a wide range of applications due to their high efficiency, fast switching speeds, and low losses.

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