NCP1618KDR2G

Overview

The NCP1618KDR2G is a high-voltage multi-mode power factor controller from onsemi, designed for offline applications. It operates in SOIC-9 (SOIC-10) packages and supports a switching frequency of 130 kHz. The device functions within a supply voltage range of 9.6 V to 35 V and withstands operating temperatures from -40 °C to +125 °C. It features startup current consumption of 4 mA, with maximum source and reverse currents of 500 mA and 800 mA respectively. This component integrates critical conduction mode (CRM) and continuous conduction mode (CCM) capabilities.

Feature Summary

• Multi-mode operation enabling natural transitions between CRM and CCM based on switching period duration to optimize efficiency across line and load ranges.
• Integration of EMI filter capacitor discharge circuitry and robust protection mechanisms including overcurrent, overvoltage, brown-out, undervoltage lockout, and surge detection.
• Soft skip frequency mode activation under very light load conditions to minimize losses and enhance overall system performance.

Applications

• Offline power supplies requiring power factor correction
• Wide-mains PFC stages up to 500W
• Consumer electronics power adapters
• Industrial power conversion systems

Procurement Notes

Verify the specific suffix KDR2G against the official datasheet to confirm package type and tape/reel specifications. Ensure compatibility with RoHS standards if required by your application. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components. Confirm that the SOIC-9/10 footprint matches your PCB design constraints before finalizing procurement orders.

Selection Notes

Select this controller when designing high-efficiency PFC circuits that require automatic mode transition without complex external control logic. It is suitable for applications needing integrated EMI mitigation features and comprehensive protection schemes. Consider the SOIC-9 package size for compact designs where minimal external components are preferred. Evaluate thermal management requirements given the wide operating temperature range.

Part Context

This component belongs to the NCP1618 series of power factor controllers. It shares architectural similarities with other models in the family but offers specific pinout and feature configurations tailored for robust PFC stage implementation. The series emphasizes multi-mode operation to maintain high efficiency across varying load conditions.

Replacement Considerations

Direct substitutes include NCP1618ADR2G, NCP1618CDR2G, NCP1618DDR2G, NCP1618FDR2G, and NCP1618JDR2G. Verify pin compatibility and electrical parameter alignment before substitution. Ensure the replacement part meets the same packaging and environmental specifications as the original design requires.