DrMOS, short for Driver-MOSFET, is a high-efficiency, energy-saving technology introduced by Intel in 2004. It optimizes size and efficiency by integrating the MOSFET and MOSFET driver into the same package. Compared to traditional discrete MOSFETs, integrated DrMOS occupies only a quarter of the area while increasing power density by three times. When used with a multiphase controller, DrMOS can deliver greater current at the same voltage, providing more efficient switching operation and contributing to more efficient power conversion. This meets the needs of low-voltage, high-power applications.
DrMOS technology was initially used primarily in the server motherboard field. However, with the continuous advancement of wireless charging technology, there is a need to provide more efficient and stable power conversion within limited space. As a result, engineers have turned their attention to DrMOS technology. Previously, DrMOS used in servers typically used a combination of two MOSFETs and a MOS driver. In the field of wireless charging, DrMOS usually uses four MOSFETs: two high-side MOSFETs and two low-side MOSFETs. The high-side MOSFETs are connected to the power supply, while the low-side MOSFETs are grounded, forming a complete "bridge" structure and a full-bridge topology. This allows for control of wireless power transmission to optimize efficiency and response speed.
The 2024 (Spring) Asia Charging Expo will be held in Shenzhen from March 20-22. Many wireless charging chip companies will participate and release a number of new products and reference designs.
DrMOS Wireless Charging Full-Bridge Power IC
ChargerLAB has compiled eight DrMOS wireless charging full-bridge power ICs launched by the four major wireless charging chip manufacturers and summarized this information into the table below, which details the main products of each company and their related packaging features.
Southchip
Shanghai Nanxin Semiconductor Technology Co., Ltd. (hereinafter referred to as Nanxin Technology, stock code: 688484) is a high-performance domestic semiconductor design company focusing on power supply, battery management and embedded systems. It has multiple product lines including charge pump, DC-DC, A-DC, wired charging, wireless charging, fast charging protocol, lithium battery protection and automotive electronics. Based on its independently developed core technologies such as buck-boost charging, charge pump and GaN direct drive, it has launched a number of star products and has been widely recognized in the industry.
Southchip Technology provides end-to-end wired and wireless fast charging solutions from AC power to battery, covering a power range from 10W to 240W. Its charge pump and buck-boost switching charging series have broken the foreign monopoly, passing certifications from numerous well-known domestic and international smartphone and tablet manufacturers and achieving large-scale mass production. Its DC-DC, wired charging, wireless charging, and embedded protocol products are widely used in consumer and industrial markets. Furthermore, many of its products have passed AEC-Q100 automotive-grade quality certification, enabling it to provide complete in-vehicle wireless and wired charging solutions, and achieving pre-installed mass production in multiple vehicle models.
Southchip Technology boasts a strong R&D and systems team, an independent quality control team, and a sales and support team closely integrated with customers, ensuring high-quality product development and design. Southchip Technology has gained widespread recognition and support from upstream and downstream industry chains and capital, receiving investment from the Shanghai Integrated Circuit Industry Fund, SMIC Capital, Sequoia Capital, OPPO, vivo, Xiaomi, and others, contributing to the company's continuous and rapid growth.
Southchip Technology's products have frequently appeared in products from Honor, OPPO, vivo, Xiaomi, Lenovo, Samsung, Anker, ZMI, and other brands, and have been successfully mass-produced in pre-installed products for multiple automotive brands, demonstrating the numerous advantages of its products in terms of performance, quality, and cost. Southchip Technology adheres to the product philosophy of "time first, performance first" and upholds the company culture of "pioneering and continuous innovation," committed to providing customers with high-performance, high-quality, and cost-effective system solutions.
Southchip, born for efficiency.
Southchip SC5001
The SC5001 is a highly integrated wireless power transmitter analog chip that includes all the components needed to build a WPC-compliant transmitter. It integrates a complete full-bridge power driver, MOSFETs, current-sense amplifier, self-regulating circuitry, communication demodulator, linear regulator, and protection circuitry. The SC5001 can work in conjunction with a transmitter controller to form a high-performance wireless power transmitter that complies with both the WPC V1.2.4 Extended Power Profile (EPP) and Baseline Power Profile (BPP) standards. The transmitter can provide up to 15W of output power when an EPP receiver is detected, and up to 5W for a BPP receiver.
The IGBT (Insulated Gate Bipolar Transistor) full-bridge drive circuit is a common power electronic drive solution used to control the switching operation of IGBT modules in high-voltage, high-current applications. This article will detail the working principle and applications of the IGBT full-bridge drive circuit.
I. Working Principle:
The primary goal of an IGBT full-bridge driver circuit is to provide appropriate voltage and current signals to control the switching state of the IGBT module. Its operating principle is based on controlling the IGBT's gate potential via a drive signal, thereby controlling the IGBT's on/off state. By properly controlling the gate potential, the IGBT can switch rapidly, achieving efficient power conversion.
II. Application Areas:
1. Variable frequency drive applications:
IGBT full-bridge drive circuits play a crucial role in variable frequency drive systems. For example, in AC motor drives, precise control of the IGBT full-bridge drive circuit allows for the regulation of motor speed and torque, achieving efficient energy conversion and precise operational control. This is widely used in industrial applications such as brushless DC motor drives, rail transportation, and marine engineering.
2. Inverter Applications:
Inverters are used to convert DC power to AC power, and the IGBT full-bridge drive circuit plays a crucial role in the inverter. Inverters are widely used in new energy power generation, solar and wind power conversion systems. By precisely controlling the IGBT full-bridge drive circuit, efficient power conversion can be achieved, and the quality and stability of the output waveform can be guaranteed.
3. Electric vehicle applications:
IGBT full-bridge drive circuits are indispensable in the field of electric vehicles. Electric vehicles use high-voltage DC batteries for power, and the IGBT full-bridge drive circuit converts the DC power into AC power to drive the motor and move the vehicle. The IGBT full-bridge drive circuit ensures efficient energy conversion and precise motor control, improving the performance and driving range of electric vehicles.
4. Renewable energy applications:
In the field of renewable energy, such as photovoltaic inverters and wind power generation systems, IGBT full-bridge drive circuits play a crucial role. Through precise control of the output of photovoltaic cells and wind turbines, electrical energy can be injected into the grid with high efficiency. The fast switching characteristics of IGBT full-bridge drive circuits, combined with high-frequency modulation technology, enable the maximum utilization of photovoltaic and wind power energy.
Full-bridge optocoupler circuits are an important component in the electronics field, playing a crucial role in improving circuit driving efficiency. In this article, Zhaoxin will analyze the principles of full-bridge driver circuits in detail and explain their operating scheme to help you better understand this key technology.
1. Introduction to Full-Bridge Drive Circuit
First, let's take a brief look at the full-bridge drive circuit. The full-bridge drive circuit is a crucial component of the control loop for motors or loads. It precisely controls the states of four switching transistors to ensure current flows to the load, thereby enabling the movement or operation of the motor or load. This type of circuit is widely used across various industries, from industrial control automation to electric vehicles.
2. Working principle of the full-bridge drive circuit
Below, Zhaoxin will provide an in-depth analysis of the working principle of the full-bridge drive circuit. It consists of four power switching transistors, commonly labeled Q1, Q2, Q3, and Q4. These four transistors can be combined in pairs to control current injection. By immediately turning the transistors on or off, the forward and reverse current flow can be achieved, thereby controlling the motor's direction of motion or load.
3. Advantages of full-bridge drive circuits
Why choose a full-bridge driver circuit? What are its advantages?
① Full-bridge drive circuits are highly efficient, can effectively control the direction of current flow, and reduce energy loss. They are very common in applications that require high efficiency.
② Full-bridge drive circuits generally have a high response time, enabling them to adjust the operating state of the motor or load more quickly, which is crucial for applications requiring high-precision control.
4. How to design and optimize a full-bridge driver circuit?
Now, let Zhaoxin discuss how to design and optimize full-bridge optocoupler circuits. First, selecting the appropriate power switching equipment is crucial. Different applications require different types and models of equipment. Second, improving the control system is also a key factor in enhancing the characteristics of the full-bridge optocoupler circuit. By selecting appropriate control measures, the potential of the power supply can be maximized.
5. Common and main applications of full-bridge drive circuits
Full-bridge optocouplers have a wide range of key applications, and their superior performance and precise operation have made them core components in various electronic products and systems. Below are some typical application scenarios:
Motor Control: Full-bridge optocouplers are widely used in industrial control automation, automated control, and electric vehicles for motor control. By controlling the direction and speed of the motor, machines and vehicles can operate efficiently. Whether in manufacturing production lines or electric vehicle motor control systems, full-bridge optocouplers are crucial control systems.
Power Inverter: An inverter is used to convert direct current (DC) to alternating current (AC) to meet the power requirements of various applications. A full-bridge optocoupler plays a crucial role in the power inverter, ensuring that it can efficiently convert electrical energy into the required AC power for use in homes, offices, or factories.
Wireless Chargers: With the continuous development of wireless charging technology, the use of full-bridge optocoupler circuits in wireless chargers is gradually increasing. It facilitates rapid wireless power transfer, allowing devices to charge without being plugged into cables. This is widely used in smartphones, pneumatic tools, and electric vehicles.
Home appliances: Floor scrubbers, refrigerators, microwave ovens, and other home appliances typically require precise motor control and efficient power conversion. Full-bridge optocoupler circuits can optimize the performance and energy efficiency of these appliances, providing a superior customer experience.
Industrial Automation: In industrial automation, various industrial equipment requires precise motion control and efficient power management. Full-bridge optocoupler circuits are beneficial in achieving this requirement, improving the efficiency and reliability of production lines.
