NCP1219AD65R2G

AC DC Converters, Offline Switchers Overview

The NCP1219AD65R2G is an offline flyback switching controller from onsemi, designed for cost-effective AC-DC power supplies. It features dynamic self-supply (DSS) to eliminate external startup circuitry and a user-programmable skip cycle threshold for reduced light-load dissipation. The device operates at a fixed 65 kHz switching frequency with a maximum duty cycle of 80%. It provides an output current capability of 800 mA and supports an output voltage range from -300 mV to 20 V. Operating temperatures span from -40°C to +150°C TJ, housed in a 7-SOIC package.

AC DC Converters, Offline Switchers Feature Summary

• Dynamic self-supply (DSS) functionality eliminates the need for external startup components.
• User-programmable skip cycle threshold reduces power dissipation during light loads and standby modes.
• Latch signal input enables implementation of protection functionalities via external signals.

AC DC Converters, Offline Switchers Applications

• Universal input AC-DC printer adapters
• Offline flyback power supply designs
• Low parts count AC-DC converter systems

AC DC Converters, Offline Switchers Procurement Notes

Verify component status as NRND (Not Recommended for New Designs). Confirm RoHS compliance and MSL level through official datasheets. Check for specific ordering suffixes if alternative packaging is required. Ensure design-in approval accounts for end-of-life implications before finalizing procurement plans.

AC DC Converters, Offline Switchers Selection Notes

Select this controller for applications requiring simplified startup circuits and low standby power consumption. The DSS feature reduces bill of materials by removing external resistors. Consider the 65 kHz frequency for standard transformer sizes. Verify latch pin compatibility for required overvoltage or overcurrent protection schemes.

AC DC Converters, Offline Switchers Part Context

Part of the NCP12XX family of current-mode flyback controllers. Designed for high-performance offline power supplies with extremely low no-load consumption. Integrates peak current mode control with jittered switching to reduce EMI. Targets universal input applications across global markets.

AC DC Converters, Offline Switchers Replacement Considerations

Check for direct substitutes within the NCP12XX series. Verify pinout compatibility for SOIC-7 packages. Review updated datasheets for any functional changes due to copper wire revisions or manufacturing process updates.