onsemi NCP1079ABP065G

NCP1079ABP065G - High-Performance Flyback Switching Controller

The NCP1079ABP065G from onsemi is a robust offline flyback switching controller designed for isolated AC/DC power conversion applications up to 41W. This integrated controller features a 700V breakdown voltage, 65kHz switching frequency, and comprehensive fault protection including current limiting, over-power, over-temperature, over-voltage, and short circuit protection.

Engineered for reliability and efficiency, the NCP1079ABP065G delivers consistent performance across demanding industrial, medical, and telecommunications applications. Its fixed 65kHz switching frequency ensures predictable EMI characteristics, simplifying filter design and reducing overall system cost. The integrated high-voltage MOSFET eliminates the need for external switching components, reducing board space and component count.

Key Features:

• 700V high-voltage breakdown capability for universal AC input applications
• 65kHz fixed switching frequency for predictable EMI performance and simplified filter design
• Integrated 41W power handling with internal high-voltage MOSFET
• Wide supply voltage range: 6.5V to 20V for flexible design options
• 8.4V start-up voltage for reliable cold-start operation
• 68% maximum duty cycle for optimized transformer utilization
• Comprehensive fault protection suite: current limiting, over-power, over-temperature, over-voltage, and short circuit protection
• Through-hole 7-PDIP package for easy assembly and prototyping
• Extended operating temperature range: -40°C to 125°C (TJ) for harsh environments
• RoHS compliant for environmental compliance
• Low standby power consumption for energy-efficient designs

Applications:

• AC/DC adapters and wall chargers for consumer electronics
• Auxiliary power supplies for industrial equipment
• Battery chargers for portable devices and power tools
• LED drivers for lighting applications
• Low-to-medium power offline converters requiring galvanic isolation
• Smart home and IoT device power supplies
• Medical equipment auxiliary power
• Telecommunications infrastructure power modules

Design Benefits:

The NCP1079ABP065G simplifies power supply design by integrating critical protection features and the high-voltage switch in a single package. The fixed frequency operation allows designers to optimize magnetic components for specific applications, while the comprehensive protection features ensure long-term reliability and safety compliance. The through-hole package facilitates rapid prototyping and is ideal for applications where ease of assembly and serviceability are priorities.

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• NCP1079ABP065G.pdf