As the core component of power management, the model selection of AC-DC chips directly affects the energy efficiency, size, and reliability of the equipment. According to the application scenarios and technical characteristics, the mainstream models can be summarized as follows:
1、 International manufacturer model: Technology accumulation and high performance
Power Integrations (PI)
LinkSwitch series (such as LNK306, LNK3207): Integrated high voltage MOSFET, supports 5V/1A to 12V/2A output, six level energy efficiency certification, suitable for small appliances and chargers.
InnoSwitch series (such as INN2218K): adopts quasi resonant technology, standby power consumption<30mW, supports PD fast charging, and is compatible with mobile phone/laptop adapters.
ON Semiconductor
NCP1342: Peak current mode control, standby power consumption<75mW, built-in multiple protections, used for LED drivers and adapters.
NCP13992: Supports GaN driving, with a working frequency of up to 1MHz, suitable for high power density fast charging.
Infineon
ICE2PCS01G: Integrated 700V MOSFET, supports valley turn on technology, excellent EMI performance, used for industrial power supplies and motor drives.
CoolSET series (such as CoolSET CE): Built in 1200V SiC MOSFET, suitable for automotive electronics and charging stations.
ROHM
BD28C5x series (such as BD28C54FJLB): supports SiMOSFET/IGBT/SiC drivers, equipped with high-precision undervoltage locking function, designed for industrial power supply, and provides long-term stable supply.
2、 Local manufacturer models: high cost-effectiveness and fast iteration
Chipown
SM7012/SM7022: Built in high-voltage starting circuit, with a cost of less than $0.5, occupying 60% of the small home appliance market share.
SM7205: Standby power consumption<30mW, constant voltage accuracy ± 5%, no need for optocouplers and TL431, suitable for routers/set-top boxes.
JoulWatt
JW1550: Asymmetric Half Bridge (AHB) controller with an efficiency of 94%, supporting 100W fast charging, imported into the supply chain of Chint Electric and others.
JW1515: Integrated PFC+LLC, power density 0.5W/cm ³, targeting data center power supply.
Southchip Semiconductor
SC3056: Encapsulated 650V GaN device, supporting PD3.1 protocol, power density of 1.5W/cm ³, entering the Anke/Zimi supply chain.
Qida Technology
CR6850/CR6851: Based on "GreenPower" technology, standby power consumption is lower than international standards, suitable for 60W80W adapters and LCD TVs.
UnionPay Treasure Technology
TB6806/TB6818: Primary feedback design, eliminating optocouplers and TL431, meeting six levels of energy efficiency, suitable for low-cost adapters.
3、 Technological Evolution and Emerging Models
Topology innovation
Flyback: mainstream<75W solutions, such as Yutai ETA8056 integrated quasi resonant mode.
LLC resonance: preferred for medium to high power applications, such as the Jewat JW1550 achieving 94% efficiency through AHB topology.
Material Innovation
GaN encapsulated chips: Nanxin SC3056 and Dongke DK065G, with a 50% reduction in volume compared to traditional solutions.
SiC integration: Infineon CoolSET CE has a built-in 1200V SiC MOSFET, suitable for new energy vehicles.
Function integration
Protocol+Power Integration: Yingjixin IP2736 supports PD3.1/QC5.0 and integrates multi port power allocation algorithms.
4、 Selection reference table
|Category | Chip Model | Key Features | Typical Application Scenarios|
|International High Performance | InnoSwitch INN2218K | Standby Power Consumption<30mW, Supports PD Fast Charging | Phone/Laptop Adapter|
|| NCP13992 | 1MHz High Frequency, GaN Driven | High Power Density Fast Charging|
|Local High Cost Performance | SM7022 | Cost<0.5 USD, Built in High Voltage Start | Small Appliance Power Supply|
|SC3056 | Encapsulated GaN, power density 1.5W/cm ³ | 100W+fast charging|
|Industrial specific | BD28C54FJLB | Supports SiC drive, ± 5% threshold voltage error | Industrial AC-DC power supply|
|Low power optimization | CR6851 | Extremely low standby power consumption, frequency jitter improves EMI | Adapter/LCD TV|
5、 Selection suggestions
Consumer electronics: Choose models with high integration and low standby power consumption (such as SM7205, CR6851).
Industrial power supply: requires wide voltage input and high temperature tolerance (such as UCC28780, BD28C54FJLB).
Fast charging market: GaN encapsulated chips (such as SC3056, DK065G) are the trend, supporting high power density designs.
Future direction: Digital control (such as TI UCD3138 integrated with ARM core) and modular design (such as PI InnoSwitch Family) will further simplify the power architecture and drive energy efficiency to exceed 95%. The selection should be based on power requirements, energy efficiency standards, and cost targets. Local manufacturers' breakthroughs in GaN and digital control fields will provide more flexible choices.