NCP1622BCCSNT1G

Overview

The NCP1622BCCSNT1G is a Power Factor Correction (PFC) controller from onsemi, designed for driving PFC boost stages. It utilizes Valley Synchronized Frequency Fold-back (VSFF) technology to operate in Critical Conduction Mode (CrM). The device features a switching frequency of 33 kHz and operates within a temperature range of -40°C to +125°C. It is housed in a TSOP-6 surface-mount package with a power dissipation rating of 550 mW and a typical operating supply current of 70 uA.

Feature Summary

• Implements Valley Synchronized Frequency Fold-back (VSFF) to maximize energy efficiency across nominal and light loads by linearly reducing frequency below the preset level.

Applications

• Power factor correction circuits for chargers
• Power supplies for LCD televisions

Procurement Notes

Verify the specific suffix 'BCC' against official datasheets to confirm pinout or functional variations compared to standard variants. Confirm RoHS compliance status through manufacturer documentation. Ensure the TSOP-6 package type matches the target PCB footprint design requirements.

Selection Notes

Select this component for designs requiring high efficiency at light loads using VSFF technology. It is suitable for applications where minimizing external components and achieving low standby loss are priorities. Verify that the required input voltage range and output power levels align with the controller's operational specifications.

Part Context

This part belongs to the NCP1622 series of CrM PFC controllers. It serves as an enhanced efficiency solution compared to earlier generations, offering integrated Zero Current Detection (ZCD) and current sensing lines to simplify circuit design while maintaining robust performance in compact form factors.

Replacement Considerations

NCP1623A is documented as a replacement option that retains core functionalities while adding features like Follower Boost and secondary side OVP protection.