NCP4328BSNT1G

Overview

The NCP4328BSNT1G is a secondary side constant voltage controller from onsemi, designed for quasi-resonant switching mode power supplies. It operates within an input voltage range of 2.5 V to 36 V and features an adjustable output. The device supports a maximum switching frequency of 1 kHz with a maximum duty cycle of 12.5%. It draws a typical operating supply current of 105 uA. Packaged in a surface-mount SOT-23-6 (TSOT-23-6) format, it functions as a non-isolated controller suitable for applications requiring precise secondary-side regulation.

Feature Summary

• Provides secondary side constant voltage control for power supply architectures
• Supports quasi-resonant switching mode operation for efficiency optimization
• Features adjustable output voltage capability for flexible design integration

Applications

• Secondary controllers for AC-DC converters
• Quasi-resonant switching mode power supplies
• Constant voltage regulation circuits

Procurement Notes

Verify the specific package variant against official documentation, as datasheets may list both SOT-23-5 and SOT-23-6 options within the NCP4328 family. Confirm that the BSNT1G suffix corresponds to the six-pin TSOT-23-6 configuration required for your layout. Ensure compatibility with the intended switching frequency and duty cycle limits before finalizing component selection.

Selection Notes

Select this component when designing secondary-side regulation for quasi-resonant topologies requiring low quiescent current. The adjustable output allows adaptation to various voltage requirements. Verify thermal performance within the -40°C to +125°C operating range. Ensure the PCB footprint matches the SOT-23-6 package dimensions specified in the mechanical data section of the product datasheet.

Part Context

This part belongs to the NCP4328 series of secondary side constant voltage controllers. It complements other variants like the NCP4328ASNT1G, which utilizes a five-pin SOT-23-5 package. Both devices share similar electrical characteristics but differ in pin count and physical footprint, allowing designers to choose based on board space constraints and interconnection needs.

Replacement Considerations

The NCP4328ASNT1G serves as a functional alternative within the same series, offering identical electrical performance but packaged in a SOT-23-5 format. Designers must verify pinout compatibility and PCB footprint differences when substituting between these two variants.