NCP1207BDR2G

AC DC Converters, Offline Switchers Overview

The NCP1207BDR2G is a PWM current-mode controller designed for free-running quasi-resonant operation in power supply applications. It integrates a true current mode modulator with a demagnetization detector to ensure full borderline or critical conduction mode under varying load and line conditions, minimizing drain voltage switching losses. The device supports skip cycle capability, entering burst mode at low peak currents to eliminate audible noise. An internal timer prevents the free-run frequency from exceeding 125 kHz, ensuring compliance with CISPR-22 EMI limits.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a true current mode modulator and demagnetization detector for optimal boundary conduction
• Features inherent skip cycle capability to enter burst mode at low loads for silent operation
• Includes an internal timer to limit free-run frequency below 150 kHz EMI starting limits

AC DC Converters, Offline Switchers Applications

• Flyback converters requiring quasi-resonant operation
• Power supplies needing low audible noise performance
• Systems requiring compliance with CISPR-22 EMI standards

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix DR2G against the manufacturer's latest datasheet to confirm package type and tape/reel specifications. Ensure compatibility with your PCB footprint for the SOIC-8 package. Check RoHS compliance status directly with onsemi documentation as regulatory requirements may evolve. Confirm active lifecycle status before finalizing procurement plans.

AC DC Converters, Offline Switchers Selection Notes

Select this component when designing flyback topologies that benefit from reduced switching losses through quasi-resonant techniques. It is suitable for applications where acoustic noise must be minimized during light load conditions. Consider the fixed internal timer constraints if strict frequency regulation above 125 kHz is required in free-run mode without external adjustment.

AC DC Converters, Offline Switchers Part Context

This part belongs to the NCP1207 series of switching controllers from onsemi. It is specifically engineered for high-efficiency offline power conversion. The series is known for combining current-mode control with resonant detection to optimize performance across wide input voltage ranges and varying load profiles.

AC DC Converters, Offline Switchers Replacement Considerations

NCP1207ADR2G is a documented variant within the same family offering similar functionality.