company blog about Supply NXP AC-DC Solutions:AC-DC Controllers,Secondary Side Controllers

Supply NXP AC-DC Solutions:AC-DC Controllers,Secondary Side Controllers

Shenzhen Mingjiada Electronics Co., Ltd. is a globally renowned authorised independent distributor of electronic components, specialising in providing a comprehensive range of electronic component supply services, from chips to modules.

Main Product Categories

Integrated circuits (ICs), 5G chips, new energy ICs, Internet of Things (IoT) chips, Bluetooth chips, automotive chips, AI ICs, Ethernet ICs, memory chips, sensors, IGBT modules and various other products.

Core Strengths

Stable supply chain: We collaborate with over 500 semiconductor manufacturers worldwide to ensure products are genuine and sourced from authorised channels.

Adequate stock levels: With over 2 million SKUs in stock, we support rapid dispatch within 1–3 days.

Competitive pricing: Leveraging economies of scale in procurement, we offer tiered discounts and long-term price lock-in services.

I. NXP AC-DC Controllers: The Core ‘Commander’ of AC-DC Conversion

AC-DC controllers are the core components of AC-DC power supply systems. They are primarily responsible for regulating the conduction and turn-off of the main power switching devices to achieve efficient conversion from AC input to DC output. They also incorporate protection functions against overvoltage, overcurrent and overheating, ensuring the safe and stable operation of the power supply system. NXP offers a comprehensive range of AC-DC controllers, covering low-power, medium-to-high-power and specialised applications. Leveraging GreenChip technology, these controllers have achieved dual breakthroughs in both energy efficiency and reliability.

1.1 Core Product Series and Technical Characteristics

NXP’s AC-DC controllers are primarily divided into three major categories: **controllers with integrated PFC (Power Factor Correction)**, **controllers with integrated power switches**, and **general-purpose fixed-frequency/quasi-resonant controllers**, providing precise solutions for different power ratings and application scenarios.

(1) AC-DC Controllers with Integrated PFC

Designed specifically for medium-to-high-power applications of 75W and above, these controllers integrate PFC control and DC-DC control functions onto a single chip, effectively simplifying circuit design and reducing PCB footprint. Taking the TEA2376 as an example, as a digitally configurable interleaved PFC controller, it supports flexible parameter adjustment via a GUI interface to adapt to different topologies. It can achieve power factor correction efficiency of over 99 per cent, significantly reduce input current harmonics, and meet international energy efficiency standards such as IEC 61000-3-2. This product series also features a wide input voltage range (90 VAC to 265 VAC), adaptive on-time control and over-temperature protection, and is widely used in applications such as server power supplies, industrial adapters and LED driver power supplies.

(2) AC-DC controllers with integrated power switches

For low-power applications (typically 1 W to 65 W), NXP has launched AC-DC controllers with integrated power switches, offering excellent value for money and a minimalist design as their key advantages. This product series integrates the controller with a power MOSFET, reducing the number of external components and thereby lowering system costs and size. For example, the TEA173x series (TEA1731/1732/1733/1738) of fixed-frequency flyback controllers offers a high conversion efficiency of approximately 90 per cent. They feature extremely low supply current during start-up and normal operation, and enable frequency down-conversion control under light or no-load conditions, reducing no-load power consumption to below 100 mW. When paired with NXP’s standby mode solution, no-load power consumption can be further reduced to within 40 mW, making them ideally suited for low-power applications such as mobile phone chargers, small household appliance power supplies and smart device adaptors.

(3) General-purpose fixed-frequency/quasi-resonant controllers

To meet diverse design requirements, NXP has also launched general-purpose AC-DC controllers that support switching between fixed-frequency and quasi-resonant (QR) operating modes, balancing efficiency with electromagnetic compatibility (EMC). In particular, the quasi-resonant mode effectively reduces switching losses, improves light-load efficiency, minimises EMI interference and simplifies filter circuit design. This product series supports multiple topologies (flyback, forward, etc.) and features comprehensive protection functions, including over-voltage protection (OVP), over-current protection (OCP), under-voltage lock-out (UVLO) and cycle-by-cycle current limiting. It can be flexibly adapted to a wide range of applications, such as consumer electronics, industrial control and automotive auxiliary power supplies, providing developers with ample design flexibility.

1.2 Key Technical Advantages

NXP’s AC-DC controllers, based on the GreenChip technology platform, deliver comprehensive improvements in energy efficiency, reliability and integration. Firstly, **high integration** reduces the number of external components through functional integration, simplifying circuit design and shortening the R&D cycle; secondly, **high energy efficiency** supports multiple energy-saving modes to meet global energy efficiency standards (such as DOE, CEC and ErP); thirdly, **superior EMC performance**, with built-in EMI optimisation circuits that reduce electromagnetic interference and lower the cost of filtering components; and fourthly, **comprehensive protection mechanisms**, which ensure the safe operation of the power supply system under abnormal conditions and enhance product reliability.

II. NXP Secondary-Side Controllers: The Key ‘Support’ for Improving Conversion Efficiency

In AC-DC power supply systems, secondary-side controllers are primarily used for synchronous rectification (SR) control, replacing traditional diode rectification. By precisely controlling the turn-on and turn-off of synchronous rectification MOSFETs, they reduce rectification losses and significantly improve the overall conversion efficiency of the power supply, with particularly notable effects under light-load conditions. With high integration, precise control and broad adaptability at their core, NXP’s secondary-side controllers have become the preferred choice for synchronous rectification solutions.

2.1 Core Product Series and Technical Characteristics

NXP’s secondary-side controllers are tailored for synchronous rectification control applications. The product range encompasses single-channel and dual-channel synchronous rectification controllers, supporting both high-side and low-side control, and is compatible with various topologies and power ratings. Key products include the TEA1792 series, TEA1993TS and TEA2096.

(1) TEA1792 Series Synchronous Rectification Controllers

The TEA1792 series (TEA1792AT/TEA1792TS) comprises secondary-side synchronous rectification controllers specifically designed for Discontinuous Conduction Mode (DCM) and quasi-resonant flyback converters. Manufactured using Silicon-on-Insulator (SOI) technology, they offer excellent electrical performance and reliability. This series supports both high-side and low-side control modes, allowing flexible adaptation to different power supply topologies. It incorporates a precise zero-current detection (ZCD) circuit capable of rapidly detecting changes in the transformer’s secondary winding current, thereby precisely controlling the turn-on and turn-off of the synchronous rectification MOSFET to prevent reverse current losses and enhance conversion efficiency. Furthermore, the products integrate overvoltage and overcurrent protection functions, reducing the need for external protection components. With a wide input voltage range, they are suitable for a variety of output voltage scenarios and are widely used in mobile phone chargers, laptop adapters, consumer electronics power supplies and other fields.

(2) TEA1993TS GreenChip Synchronous Rectification Controller

The TEA1993TS also utilises SOI technology and is specifically designed for flyback power supplies. Its key advantage lies in its ability to generate the supply voltage autonomously, without the need for an additional auxiliary power supply, making it particularly suitable for low-output-voltage battery charging applications or high-side rectification scenarios. This product integrates sensing and driving circuits, enabling it to directly drive synchronous rectification MOSFETs and thereby simplify circuit design. It also features precise current sensing and control functions, effectively reducing rectification losses and improving power supply efficiency under both light and full loads. Furthermore, its compact package (such as SOT23-6) allows for a further reduction in power supply size, meeting the demands of miniaturised power supply designs.

(3) TEA2096 Dual Synchronous Rectification Controller

For high-power or multi-output applications, NXP has launched the TEA2096 dual synchronous rectification controller, which supports dual-channel synchronous rectification control and is suitable for output voltages below 200 V. With high drive capability, it can simultaneously control two synchronous rectification MOSFETs, meeting the rectification requirements of multi-output or high-power power supplies. This product incorporates comprehensive protection mechanisms, including over-temperature and over-voltage protection, whilst also supporting adaptive frequency adjustment to balance efficiency and EMC performance. It is suitable for applications such as industrial power supplies, server auxiliary power supplies and high-power adapters.

2.2 Core Technical Advantages

NXP’s secondary-side controllers offer significant advantages in the field of synchronous rectification control: Firstly, **precise control algorithms**: a built-in high-performance ZCD circuit enables precise switching control of synchronous rectification MOSFETs, minimising rectification losses; secondly, **highly integrated design**: the integration of sensing, driving and protection functions reduces the number of external components, thereby lowering system costs and size; thirdly, **broad adaptability**: support for multiple topologies, high-side and low-side control modes, and a wide voltage range ensures suitability for different power levels and application scenarios; Fourthly, **outstanding reliability**: utilising SOI technology to enhance the product’s immunity to interference and extend its service life, ensuring suitability for complex operating environments.

III. Synergistic Application and Scenario Adaptation of NXP’s AC-DC Solutions

NXP’s AC-DC controllers and secondary-side controllers work in perfect synergy to build highly efficient and stable AC-DC power supply systems. For example, in laptop adaptor applications, pairing the TEA173x series AC-DC controller with the TEA1792 series secondary-side synchronous rectification controller can achieve an overall conversion efficiency of over 95 per cent and no-load power consumption of less than 30 mW, whilst meeting the requirements for compact size and low EMI design; In industrial power supply applications, the TEA2376 AC-DC controller with integrated PFC, paired with the TEA2096 dual synchronous rectification controller, delivers high power factor and high conversion efficiency, meeting the stringent requirements for power supply reliability and energy efficiency in industrial equipment.

Currently, NXP’s AC-DC solutions are widely deployed across various sectors, including consumer electronics (mobile phone chargers, laptop adapters, smart speaker power supplies), industrial control (industrial adapters, PLC power supplies), automotive electronics (in-vehicle chargers, auxiliary vehicle power supplies) and LED lighting (LED driver power supplies). With a comprehensive product portfolio, outstanding technical performance and a wealth of reference designs, they provide developers with one-stop solutions ranging from chips to systems, accelerating product development and mass production processes.