NCP1205DR2G

AC DC Converters, Offline Switchers Overview

The NCP1205DR2G is an offline switcher IC designed for flyback power supply topologies. It operates within a switching frequency range of 90 kHz to 125 kHz and supports a supply voltage (Vcc/Vdd) between 8 V and 30 V. The device is housed in a 14-pin PDIP package with a lead pitch of 0.300 inches (7.62 mm). It features comprehensive fault protection mechanisms including current limiting, overvoltage protection, and short-circuit protection. The component is rated for junction temperatures from -25°C to +125°C.

AC DC Converters, Offline Switchers Feature Summary

• Integrated high-voltage startup circuit for efficient operation
• Built-in current mode control for stable regulation
• Comprehensive protection against overload and short circuits

AC DC Converters, Offline Switchers Applications

• Offline flyback converters
• AC-DC power adapters
• General purpose isolated power supplies

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix DR2G against the official datasheet to confirm pinout and packaging details. Confirm RoHS compliance status as required by project specifications. Check for any Product Change Notifications (PCN) or End-of-Life (EOL) notices prior to finalizing design-in decisions. Ensure the supplier provides valid traceability documentation for quality assurance purposes.

AC DC Converters, Offline Switchers Selection Notes

Select this component for applications requiring a robust, cost-effective solution for low-to-medium power isolated DC-DC conversion. The fixed frequency range simplifies transformer design compared to variable frequency controllers. Consider the thermal performance of the 14-PDIP package for heat dissipation requirements in enclosed environments.

AC DC Converters, Offline Switchers Part Context

This part belongs to the NCP1205 family of current-mode PWM controllers. It is distinct from synchronous buck regulators like the NCP3135 series and gate drivers such as the NCP5183. The NCP1205 is specifically engineered for primary-side regulation in offline AC-DC applications, differing fundamentally from linear regulators like the NCP189.

AC DC Converters, Offline Switchers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Designers should consult onsemi's official replacement guide or contact technical support for qualified alternatives.