NCV12711ADNR2G

Overview

The NCV12711ADNR2G is a fixed-frequency peak-current-mode PWM controller designed for single-ended power converter topologies. It operates from 4 V to 45 V without an auxiliary winding and supports switching frequencies from 100 kHz to 1 MHz via a programmable oscillator. The device integrates slope compensation, a programmable soft-start, input voltage UVLO protection, and an over-power protection circuit that limits total power capability as input voltage increases. An onboard operational amplifier enables primary-side regulation or non-isolated DC-DC conversion. Protection features include cycle-by-cycle peak-current limiting with smooth frequency increase and timer-based overload protection, placing the device into a low quiescent fault mode with a 1-second auto-recovery period.

Feature Summary

• Integrates an internal operational amplifier for implementing primary-side regulated converters or non-isolated DC-DC applications
• Features a programmable oscillator allowing switching frequency adjustment between 100 kHz and 1 MHz
• Includes comprehensive protection mechanisms such as cycle-by-cycle peak-current limiting and timer-based overload protection

Applications

• Primary-side regulated isolated power supplies
• Non-isolated DC-DC converters
• Single-ended power converter topologies

Procurement Notes

Verify the specific suffix 'A' against the manufacturer's official documentation to confirm exact electrical characteristics and temperature ratings. Ensure the ordering part number matches the required automotive qualification standards if applicable. Cross-reference the package type and pinout configuration with the latest datasheet before finalizing procurement specifications.

Selection Notes

Select this component when designing systems requiring operation up to 45 V without an auxiliary winding. The integrated op-amp makes it suitable for cost-sensitive primary-side regulation designs. Consider the programmable frequency range and built-in slope compensation for stability in various inductor configurations. Verify thermal capabilities under maximum load conditions.

Part Context

This component belongs to the NCV12711 series of current mode controllers from onsemi. It shares functional similarities with other flyback and forward controllers but is distinguished by its wide input voltage range and integrated protection suite. The automotive-grade designation indicates compliance with specific reliability standards for automotive electronics applications.

Replacement Considerations

NCP12711ADNR2G