NCP4326DR2G

Overview

The NCP4326DR2G is a secondary side controller IC designed for multi-output quasi-resonant switchmode power supplies. It features three independent regulated outputs and operates from a main winding supply with an input voltage of 15V. The device utilizes a precision reference voltage and a dedicated operational amplifier to minimize feedback loop components. It supports resistor-selectable output voltages and includes a skip cycle feature for improved standby power in light load conditions. The component is housed in a 16-SOIC package and functions within a temperature range of 0°C to 105°C.

Feature Summary

• Provides individual regulation for three independent output voltages to enhance cross-regulation performance.
• Integrates a precision reference voltage and dedicated operational amplifier to reduce external feedback elements.
• Includes a skip cycle feature to improve standby power efficiency under light load conditions.

Applications

• Multi-output quasi-resonant switchmode power supplies
• Secondary side control for AC-DC converters
• Applications requiring low standby power performance

Procurement Notes

Verify the current lifecycle status as the product listing indicates it is discontinued. Confirm availability through authorized distributors or surplus channels if immediate procurement is required. Ensure compatibility with existing PCB footprints and design specifications before ordering, as replacement sourcing may involve longer lead times or alternative part numbers.

Selection Notes

Select this component for designs requiring precise cross-regulation across multiple outputs without complex primary-side sensing. The integrated operational amplifier reduces bill of materials count by minimizing external feedback resistors. Consider the 16-SOIC package constraints and thermal requirements for the specific application environment.

Part Context

This part belongs to the NCP4326 series of secondary controllers manufactured by onsemi. It is specifically engineered for high-efficiency power supplies where accurate voltage regulation across multiple rails is critical. The device simplifies design by integrating necessary control logic and references into a single surface-mount package.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify end-of-life notices and consult manufacturer resources for potential obsolescence management strategies.