NCP12700BDNR2G

AC DC Converters, Offline Switchers Overview

The NCP12700BDNR2G is a fixed-frequency, peak current mode PWM controller designed for single-ended power converter topologies such as Flyback and Forward. It features high-voltage startup capable of delivering at least 20 mA to the VCC pin during system startup, enabling operation from wide input voltage ranges. The device integrates a programmable oscillator with frequencies adjustable between 100 kHz and 1 MHz, including slope compensation to prevent subharmonic oscillation. Key protection features include input voltage under-voltage lockout (UVLO), adjustable soft-start, and an adjustable over-power protection circuit that limits total power as input voltage increases.

AC DC Converters, Offline Switchers Feature Summary

• Integrates high-voltage startup circuitry providing bias current for wide input range operation
• Includes adjustable over-power protection to simplify thermal design across varying input voltages
• Features UVLO and shutdown comparator allowing external disable signals for low static current modes

AC DC Converters, Offline Switchers Applications

• Flyback SMPS designs operating in continuous or discontinuous conduction modes
• Forward converter implementations requiring current mode control
• PoE-PD (Power over Ethernet Powered Device) applications

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'BDNR2G' against official onsemi documentation to confirm package type and tape/reel specifications. Ensure compatibility with required operating temperature ranges and compliance standards such as RoHS before finalizing procurement orders.

AC DC Converters, Offline Switchers Selection Notes

Select this component for applications requiring peak current mode control with integrated slope compensation. Consider its wide input voltage capability and high-voltage startup when designing systems without auxiliary bias supplies. Evaluate the MSOP-10 package constraints for thermal management and PCB layout requirements.

AC DC Converters, Offline Switchers Part Context

This part belongs to the NCP12700 series of ultra-wide input current mode PWM controllers. It shares functional similarities with variants like the NCP12700ADNR2G but may differ in specific electrical characteristics or packaging options defined by the manufacturer's product line structure.

AC DC Converters, Offline Switchers Replacement Considerations

The NCP12700ADNR2G is a documented alternative within the same family. Verify if functional differences exist regarding input voltage limits or package variations before substitution.