NCP1351DDR2G

The ON Semiconductor NCP1351DDR2G is a current-mode PWM controller designed for cost-sensitive, low-power off-line flyback Switched Mode Power Supplies (SMPS). This device targets applications requiring excellent no-load power consumption and optimized efficiency across various load conditions.

Key electrical characteristics include an operating voltage range of 8.9V to 28V and a wide operating temperature range of -25°C to 125°C. The controller utilizes a Flyback topology and offers features such as quasi-fixed TON and variable TOFF, peak current compression to reduce transformer noise, and natural frequency dithering for an improved EMI signature. It also includes fault protection for current limiting, overload, over power, and short circuits.

The NCP1351DDR2G is housed in an 8-SOIC package with a surface mount mounting type. Its design prioritizes low startup current and very low standby power through off-time expansion. The controller is suitable for applications such as auxiliary power supplies, printers, game stations, and low-cost adapters.

This component is designed for isolated output configurations and offers features like external over-power protection and undervoltage lockout. The peak current is compressed as the load becomes lighter, reducing the risk of acoustic noise while maintaining good standby power performance.