NCP1342AMAACD1R2G

AC DC Converters, Offline Switchers Overview

The NCP1342AMAACD1R2G is a highly integrated quasi-resonant flyback controller designed for high-performance offline power converters. It supports an AC input range of 9V to 28V and operates with a switching frequency of 50 kHz. The device features valley lock-out switching, active X2 capacitor discharge for sub-30 mW no-load consumption, and minimum peak current modulation (MPCM). It includes integrated high-voltage startup, over-power protection (OPP), and latch-overvoltage/overtemperature protection. Operating within a temperature range of -40°C to +125°C, it utilizes a 9-pin SOIC package.

AC DC Converters, Offline Switchers Feature Summary

• Valley lock-out switching ensures stable operation down to the sixth valley with frequency foldback.
• Integrated X2 capacitor discharge capability enables ultra-low no-load power consumption.
• Minimum peak current modulation (MPCM) rapidly reduces switching frequency at light loads.
• Silent skip mode manages power transfer while minimizing audible noise.

AC DC Converters, Offline Switchers Applications

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

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'AA' against the official datasheet to confirm pinout and functional configuration, as variations exist within the NCP1342 family. Ensure the component meets RoHS compliance requirements for your target market. Cross-reference the 9-SOIC package dimensions with your PCB footprint design. Confirm that the 50 kHz switching frequency aligns with your EMI filter specifications and transformer design constraints.

AC DC Converters, Offline Switchers Selection Notes

Select this controller for designs requiring low standby power and reduced acoustic noise through silent skip mode. The integrated X2 discharge feature simplifies compliance with energy efficiency standards. Consider the 9-SOIC package for space-constrained applications. Evaluate the need for valley locking versus standard QR operation based on desired ripple performance. Verify thermal management capabilities given the wide operating temperature range.

AC DC Converters, Offline Switchers Part Context

The NCP1342 series represents onsemi's solution for efficient offline power conversion. This model specifically targets applications demanding strict no-load power limits and quiet operation. It integrates multiple protection mechanisms including OPP and OVP, reducing external component count. The device complements other NCP134x variants by offering specific packaging and configuration options tailored for compact adapter designs.

AC DC Converters, Offline Switchers Replacement Considerations

NCP1342AMDCDAD1R2G is a manufacturer-recommended substitute. Verify compatibility regarding the specific suffix configuration and ensure identical electrical parameters before replacement.

AC DC Converters, Offline Switchers FAQ

How does the NCP1342AMAACD1R2G achieve low no-load power consumption?

It utilizes an integrated active X2 capacitor discharge function, allowing the system to maintain no-load power consumption below 30 mW.

What mechanism prevents audible noise in this controller?

The device employs a silent skip mode that manages power delivery at light loads while minimizing switching activity to reduce audible noise.