NCP1342ANDCDAD1R2G

AC DC Converters, Offline Switchers Overview

The NCP1342ANDCDAD1R2G is a high-frequency quasi-resonant flyback controller manufactured by onsemi. It operates within a supply voltage range of 9 V to 28 V and supports a switching frequency of 500 kHz. The device is housed in a 9-pin SOIC package (SOIC-9) designed for surface mount installation. It functions across an extended temperature range from -40 °C to +125 °C. Key electrical characteristics include a fall time of 5 ns and a rise time of 20 ns. The component provides one output channel and utilizes non-isolated insulation.

AC DC Converters, Offline Switchers Feature Summary

• Integrates active X2 capacitor discharge capability to achieve ultra-low no-load power consumption below 30 mW.
• Features valley lock-out switching circuitry to ensure stable valley switching, supporting operation down to the sixth valley.
• Includes minimum peak current modulation (MPCM) to rapidly reduce switching frequency during light load conditions.
• Provides comprehensive protection mechanisms including over-power protection (OPP), latch-overvoltage, and NTC-compatible thermal protection.

AC DC Converters, Offline Switchers Applications

• Medium or high power AC-DC adapters
• Ultra-high density AC-DC adapters
• USB PD standard compliant chargers
• Notebook power adapters
• Flat panel TV SMPS

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'AND' against official datasheets to confirm pinout and functional variations compared to other NCP1342 variants. Confirm RoHS compliance status and lead times with authorized distributors, as availability may vary. Ensure the SOIC-9 package dimensions match the target PCB footprint requirements before finalizing procurement orders.

AC DC Converters, Offline Switchers Selection Notes

Select this controller for designs requiring high efficiency through quasi-resonant switching and low standby power. The integrated features simplify design by reducing external component count for protection and soft-start circuits. Consider the 500 kHz switching frequency when sizing magnetic components to balance size and loss. Verify that the input voltage range aligns with the specific AC/DC application requirements.

AC DC Converters, Offline Switchers Part Context

This component belongs to the NCP1342 series of highly integrated quasi-resonant flyback controllers. The series is engineered for offline power converters demanding high performance and reliability. It replaces older discrete solutions by integrating startup, protection, and control logic into a single compact package suitable for modern power supply designs.

AC DC Converters, Offline Switchers Replacement Considerations

NCP1342AMDCDAD1R2G is listed as a manufacturer-recommended substitute. Verify compatibility regarding package type and electrical specifications before substitution.