NCP1342AMDCCDR2G

AC DC Converters, Offline Switchers Overview

The NCP1342AMDCCDR2G is a quasi-resonant flyback controller from onsemi, designed for high-performance offline power converters. It operates in an SOIC-8 package with a single output and non-isolated insulation type. The device supports a switching frequency of 25 kHz and delivers up to 800 mA output current at 12 V. It functions within a temperature range of -40°C to +125°C and consumes 1 mA during operation.

AC DC Converters, Offline Switchers Feature Summary

• Integrates active X2 capacitor discharge capability to achieve ultra-low no-load power consumption below 30 mW without external resistors.
• Features proprietary valley lock-out circuitry ensuring stable valley switching down to the sixth valley with transition to frequency foldback.
• Includes minimum peak current modulation (MPCM) for rapid switch frequency reduction under light load conditions.
• Provides comprehensive protection mechanisms including internal undervoltage detection, non-dissipative over-power protection, and latch-overvoltage.

AC DC Converters, Offline Switchers Applications

• Medium or high power AC-DC adapters
• Ultra-high density AC-DC adapters
• USB PD standard compliant power supplies

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix against official datasheets to confirm pinout and electrical characteristics, as variations exist within the family. Confirm RoHS compliance status through manufacturer documentation prior to integration. Ensure design compatibility with the SOIC-8 surface mount footprint and thermal requirements for the specified operating temperature range.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring efficient quasi-resonant operation with integrated noise management features. The inclusion of MPCM and quiet skip mode makes it suitable for applications sensitive to audible noise. Verify that the SOIC-8 package meets spatial constraints and that the 800 mA output current rating aligns with system power requirements.

AC DC Converters, Offline Switchers Part Context

This part belongs to the NCP1342 series of highly integrated quasi-resonant flyback controllers. The series is engineered for offline power conversion applications, emphasizing efficiency and low standby power. The AMDCCDR2G variant specifically utilizes the SOIC-8 package format, distinguishing it from other pin-count options in the broader product line.

AC DC Converters, Offline Switchers Replacement Considerations

NCP1342AMDCDAD1R2G is listed as a manufacturer-recommended alternative. Verify functional equivalence and package compatibility before substitution.

AC DC Converters, Offline Switchers FAQ

How does the NCP1342 manage audible noise?

It employs a quiet skip mode technology to manage power transfer while minimizing acoustic noise generation.

What is the purpose of the integrated X2 capacitor discharge?

It allows the controller to safely discharge X2 capacitors upon AC line removal, enabling no-load power consumption below 30 mW without external resistors.