Nisshinbo Micro Devices announces the launch of the NJW4790A, a next-generation switching power supply control IC designed for quasi-resonant fly-back AC/DC converters.
Engineered for superior efficiency and low electromagnetic interference (EMI), it delivers cutting-edge performance across a wide range of power supply applications.
The NJW4790A adopts the Ringing Choke Converter (RCC) method with self-excited oscillation, ensuring high efficiency while reducing emissions. By incorporating a quasi-resonant switching mechanism, the IC achieves optimal energy performance from light to medium loads, making it an ideal choice for applications requiring compliance with global energy-saving standards, including CoC Ver5, DoE 20943, GB Level VI, and ITU-T L.1001.
Designed to enhance stability and EMI control, the NJW4790A features an integrated AC voltage detection function that suppresses frequency fluctuations due to input variations. This advancement simplifies EMI countermeasures and improves design compatibility for various power supply architectures.
In addition to its efficiency benefits, the NJW4790A boasts a robust protection suite, including overcurrent protection, output overvoltage detection, and thermal shutdown. The device also offers selectable overcurrent protection modes, such as constant-current voltage droop and fold-back droop, allowing engineers to tailor designs to specific requirements.
The NJW4790A operates within a voltage range of 7.2 to 35V and supports an extended temperature range from -40 to 125°C, making it a highly versatile solution for industrial and consumer electronics applications. Its compact MSOP10 (VSP10) package further enhances its suitability for space-constrained designs, such as AC adapters, smart meters, and industrial power supplies.
With a standby power consumption of less than 75mW, the NJW4790A is positioned as an essential component for next-generation power management systems. It delivers the efficiency, reliability, and flexibility needed to meet the growing demands of high-performance power conversion applications.
For rapid prototyping and development, evaluation boards featuring the device are available, ensuring seamless integration into your projects. A comprehensive circuit diagram and additional information simplify the design process, enabling faster time-to-market. For additional technical details and purchasing information, please refer to the datasheet or visit our official website and refer to our list of qualified local and online distribution partners.
NJW4790A specifications:
- Adopts Ringing Choke Converter (self-excited oscillation) method
- Quasi-resonant switching achieves high-efficiency and low emissions (EMI)
- Light load mode achieves high efficiency even at light load
- Detects AC voltage & suppresses EMI emission characteristic fluctuations
- Power supply voltage (VP pin voltage) range: 7.2 to 35V
- Operation start voltage (ON threshold voltage): 11.5V
- Standby voltage (Undervoltage detection threshold voltage): 6.3V
- Operating temperature range: -40 to 125°C
- Protection circuits: Overcurrent, Output overvoltage, Thermal shutdown
- Package NJW4790AR: MSOP10 (VSP10)
- Dimensions: 2.9 × 4.0mm typ., t = 1.1mm
- Datasheet NJW4790A: Consumer version
