NCP1236DD65R2G

AC DC Converters, Offline Switchers Overview

The NCP1236DD65R2G is a fixed-frequency current-mode switching controller designed for flyback converters. It features dynamic self-supply (DSS) to simplify auxiliary power design and frequency foldback for improved light-load efficiency. The device operates at a switching frequency of 65 kHz with a maximum duty cycle of 85%. It supports an output voltage of 13.5 V and provides up to 500 mA output current. The component functions within a temperature range of -40°C to +125°C and utilizes a surface-mount package.

AC DC Converters, Offline Switchers Feature Summary

• Dynamic self-supply activates internal startup current sources during transients to simplify auxiliary supply design
• Frequency foldback mechanism ensures excellent efficiency in light load conditions while maintaining low standby power consumption
• Integrated high-voltage circuit combines startup current source and brown-out detection for robust input voltage sensing

AC DC Converters, Offline Switchers Applications

• AC-DC adapters for laptop and notebook computers
• Power supplies for LCD displays
• Household consumer electronics power units
• Printer power adapters

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix DD65R2G against official onsemi documentation to confirm pinout and electrical characteristics, as variations exist within the NCP1236 family. Confirm RoHS compliance status through the manufacturer's latest environmental declaration. Ensure the procurement channel provides valid traceability for this discontinued or NRND component to avoid counterfeit risks.

AC DC Converters, Offline Switchers Selection Notes

Select this controller when designing flyback converters requiring fixed-frequency current-mode control with simplified auxiliary power management. It is suitable for applications where component cost is a constraint but performance requirements include low standby power and efficient light-load operation. Verify compatibility with existing PCB footprints if replacing previous NCP12xx series components due to pin-to-pin compatibility.

AC DC Converters, Offline Switchers Part Context

The NCP1236DD65R2G belongs to the NCP1236 family of fixed-frequency PWM current mode controllers developed by onsemi. This series targets AC-DC power solutions for home electronics and computer peripherals. The device integrates advanced protection features and frequency jittering to reduce electromagnetic interference, positioning it as a cost-effective solution for high-volume consumer electronics manufacturing.

AC DC Converters, Offline Switchers Replacement Considerations

The NCP1236BD65R2G is a pin-compatible alternative within the same family offering similar functionality. Designers should verify that the substitute part meets all thermal and electrical specifications required for the specific application before implementation.