Complete Analysis of AC-DC Chip Models: A Technology Map from International Giants to Local Newcomers
As the core component of power management, the model selection of AC-DC chips directly determines the energy efficiency, size, and reliability of the equipment. This article starts from two major camps: international manufacturers and local enterprises, and combines typical application scenarios and technological evolution trends to sort out the model matrix of AC-DC chips for you.
1、 International manufacturers: Technology accumulation and deep cultivation of scenarios
Power Integrations（PI）
LinkSwitch series (such as LNK306, LNK3207): integrates high-voltage MOSFET and control circuit, supports 5V/1A to 12V/2A output, has passed six level energy efficiency certification, and is widely used in the fields of small appliances and chargers.
InnoSwitch series (such as INN2218K): using quasi resonant technology, standby power consumption is less than 30mW, supporting PD fast charging protocol, suitable for mobile phone and laptop adapters.
Texas Instruments (TI)
UCC28780: Supports CCM/QR/DCM multi-mode, built-in high-voltage starting circuit, suitable for industrial power supply and communication equipment.
UCC28910: Integrated PFC+LLC 2-in-1 controller with an efficiency of 95%, meeting the 80Plus titanium standard, targeting the server power supply market.
ON Semi
NCP1342: Peak current mode control, standby power consumption<75mW, built-in multiple protections, suitable for LED drivers and adapters.
NCP13992: Supports high-frequency GaN driving, with a working frequency of up to 1MHz, suitable for high power density fast charging designs.
Infineon
ICE2PCS01G: Integrated 700V MOSFET, supports valley turn on technology, excellent EMI performance, used for industrial power supply and motor drive.
CoolSET series (such as CoolSET CE): Built in 1200V MOSFET, supports digital control interface, suitable for automotive electronics and charging station scenarios.
2、 Local manufacturers: rapid iteration and cost-effective breakthroughs
Chipown
SM7012/SM7022: 5V/1A~5V/2A output, built-in high-voltage starting circuit, cost less than $0.5, occupying 60% of the small home appliance market share.
SM7205: Supports ± 3% high-precision constant voltage output, standby power consumption<30mW, certified by 3C, applied to routers and set-top boxes.
JoulWatt
JW1550: Asymmetric Half Bridge (AHB) controller, supporting 100W fast charging with an efficiency of 94%, has been imported into Chint Electric and Shengfan Co., Ltd.
JW1515: Integrated PFC+LLC, with a power density of 0.5W/cm ³, targeting the data center power market.
BPSemi, Jingfeng Mingyuan
BP8706D: 20W GaN fast charging solution with built-in driver circuit, requiring only 10 peripheral components, reducing costs by 40% compared to traditional solutions.
BP6216: Synchronous rectification chip, with a conduction resistance of 8.5m Ω, supporting 12V/2A output, used in TV and monitor power supply.
Southchip Semiconductor
SC3050/SC3056: Sealed 650V GaN power device, supporting PD3.1 protocol, with a power density of 1.5W/cm ³, entering the Anke and Zimi supply chains.
SC3503: Synchronous rectification controller, supports CCM/DCM/QR modes, with an efficiency of 96%, compatible with laptop adapters.
3、 Technological Evolution: From Topology Innovation to Material Revolution
Topology upgrade
Flyback: mainstream low-power solutions (<75W), such as Yutai ETA8056 integrated 650V MOSFET, supporting quasi resonant working mode.
LLC resonance: preferred for medium to high power applications, such as the Jewat JW1550 achieving 94% efficiency through AHB topology.
Materials Innovation
Gallium Nitride (GaN): Nanxin SC3056 encapsulated GaN device with a switching frequency of 175kHz and a 50% reduction in volume.
Silicon carbide (SiC): Infineon CoolSET CE has a built-in 1200V SiC MOSFET, suitable for automotive OBC scenarios.
function integration
Protocol chip: Yingjixin IP2736 supports PD3.1/QC5.0 and integrates multi port power allocation algorithm.
Protection function: The Xinpeng Micro SM7505 is equipped with cycle by cycle current limiting and overvoltage clamp, ensuring reliability up to industrial standards.
4、 Selection guide: Scene driven and parameter matching
Consumer electronics: Prioritize models with high integration and low standby power consumption (such as SM7022, ETA8056).
Industrial power supply: Pay attention to wide voltage input range and high temperature tolerance (such as UCC28780, ICE2PCS 01G).
Automotive electronics: AEC-Q100 certification is required, such as the JW1550 automotive specification version from JEWATT.
Fast charging market: Gallium nitride encapsulated chips (such as SC3056, IP2073) are the trend, supporting high-frequency and high power density designs.
5、 Future Trends: Dual Breakthrough in Energy Efficiency and Intelligence
Energy efficiency standard upgrade: DOE VI and CoC V5 Tier 2 requirements promote the evolution of chips towards 95% efficiency.
Digital control: For example, TI UCD3138 integrates ARM Cortex-M0 core to achieve PFC+LLC digital loop compensation.
Modular design: PI InnoSwitch Family integrates PFC, PWM, and synchronous rectification on a single chip, simplifying BOM costs.
The selection of AC-DC chip models should be based on specific scenario requirements, and comprehensively evaluated from multiple dimensions such as power level, energy efficiency standards, and cost targets. With the technological breakthroughs of local manufacturers in areas such as gallium nitride and digital control, the future power supply design will show a trend of higher integration, better energy efficiency ratio, and stronger scene adaptability.