NCP12700ADNR2G

AC DC Converters, Offline Switchers Overview

The NCP12700ADNR2G 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 supporting wide input ranges of 9–120 V or 9–200 V, delivering at least 20 mA bias current during system startup. The device operates within a programmable switching frequency range of 100 kHz to 1 MHz, incorporating slope compensation to prevent subharmonic oscillation. Key electrical parameters include a maximum duty cycle of 84%, an output voltage capability of 12 V, and an output current of 2.8 A. It functions within a temperature range of -40°C to +125°C and utilizes an MSOP-10 package.

AC DC Converters, Offline Switchers Feature Summary

• Integrates high-voltage startup circuitry enabling operation from wide input voltage ranges without external auxiliary windings.
• Includes adjustable soft-start, input voltage under-voltage lockout (UVLO), and programmable over-power protection to simplify thermal design.
• Features a shutdown comparator on the UVLO pin allowing external signal control to disable switching and enter low quiescent current mode.

AC DC Converters, Offline Switchers Applications

• 45W Ethernet Powered Device (PoE-PD) implementations
• Flyback converter designs
• Forward converter architectures

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix ADNR2G against the manufacturer's official datasheet to confirm the exact voltage rating variant (e.g., 120V vs 200V support) and package outline. Ensure compatibility with the required topology and input specifications before integration. Cross-reference the RoHS status and material composition documents provided by onsemi for regulatory compliance requirements in your target market.

AC DC Converters, Offline Switchers Selection Notes

Select this component when designing isolated AC-DC or DC-DC converters requiring peak current mode control with integrated slope compensation. It is suitable for applications needing wide input voltage flexibility and built-in protection mechanisms like OVP and OPP. Consider the MSOP-10 package constraints for PCB layout and thermal management relative to the expected power dissipation levels.

AC DC Converters, Offline Switchers Part Context

This part belongs to the NCP12700 series of ultra-wide input current mode PWM controllers from onsemi. The series supports both Flyback and Forward topologies. Other variants in the family include NCP12700BDNR2G and NCP12700BMTTXG, which may differ in voltage ratings or package types such as WQFN-10. All share the core functionality of high-voltage startup and programmable frequency operation.

AC DC Converters, Offline Switchers Replacement Considerations

Direct substitutes within the same family include NCP12700BDNR2G. Verify if the alternative variant meets the specific input voltage requirements of the application, as differences may exist between the AD and BD suffixes regarding maximum operating voltages.