NCP4326DR2

Overview

The NCP4326DR2G is a secondary controller IC for multi-output quasi-resonant switchmode power supplies, manufactured by onsemi. It features three independent outputs and operates within a supply voltage range of up to 15V. The device is housed in a 16-SOIC package with a width of 3.90mm. It supports an operating temperature range from 0°C to 105°C. The component is designed to improve overall efficiency and cross-regulation figures compared to traditional regulation schemes.

Feature Summary

• Provides superior cross-regulation performance by individually regulating multiple outputs using two independent switches actuated from a main winding.
• Integrates a precision reference voltage and a dedicated operational amplifier to minimize feedback loop elements.
• Includes a skip cycle feature to enhance standby power consumption during light load conditions.
• Offers dedicated shutdown pins to easily disable secondary outputs for applications requiring low standby power.

Applications

• Multi-output quasi-resonant switchmode power supplies
• Power supplies requiring improved cross-regulation between outputs
• Applications prioritizing high efficiency and low standby power

Procurement Notes

Verify the exact part number suffix, as the provided model lacks the 'G' indicating lead-free status found in official documentation (NCP4326DR2G). Confirm component availability status, as this series has been subject to production discontinuation notices. Ensure compatibility with existing PCB footprints for the 16-SOIC package before procurement.

Selection Notes

Select this component when designing multi-output power supplies that require precise individual regulation without complex primary-side control. Consider its integration of reference and op-amp components if minimizing external feedback circuitry is a priority. Evaluate the need for skip-cycle functionality based on specific standby power requirements.

Part Context

This device belongs to onsemi's professional power management portfolio, specifically categorized under special purpose regulators. It serves as a secondary side controller, distinct from primary-side PWM controllers or gate drivers. The NCP4326 family is engineered for applications where output accuracy and efficiency are critical constraints.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Check for obsolescence notices and potential end-of-life alternatives through official manufacturer channels.