NCP1653DR2G

Overview

The NCP1653DR2G is a Power Factor Correction (PFC) controller manufactured by onsemi, designed for continuous conduction mode (CCM) boost converters. It operates in a standard SOIC-8 package and supports switching frequencies of 65 kHz, 133 kHz, and 200 kHz. The device integrates essential features for compact PFC implementation, including direct power switch conduction time control based on coil current. It utilizes a specific current sensing technique compatible with low impedance sense resistors to minimize losses.

Feature Summary

• Directly controls the power switch conduction time as a function of coil current
• Supports operation with very low impedance current sense resistors for reduced losses
• Integrates all necessary features for compact and rugged PFC stage implementation

Applications

• Continuous conduction mode (CCM) boost converter designs
• Compact power factor correction stages
• Rugged PFC implementations requiring efficient current sensing

Procurement Notes

Verify the specific switching frequency variant required, as the NCP1653 series offers options for 65 kHz, 133 kHz, and 200 kHz. Confirm that the SOIC-8 package aligns with the target PCB layout constraints. Ensure compatibility with the intended low impedance current sensing resistor configuration to leverage the device's efficiency benefits. Cross-reference the datasheet for thermal dissipation requirements under maximum load conditions.

Selection Notes

Select this component when designing CCM boost PFC converters requiring direct coil current-based control. It is suitable for applications prioritizing efficiency through low impedance current sensing. Consider the available frequency variants to match system timing requirements. This controller is appropriate for designs needing a rugged solution with integrated features for simplified implementation.

Part Context

The NCP1653 serves as a foundational controller for CCM PFC applications, establishing a control scheme that simplifies boost converter design. It is part of a family that includes upgraded versions like the NCP1654, which adds brown-out detection while retaining core functionalities. The device represents a significant step toward compact and efficient PFC implementations by integrating precise current sensing capabilities directly into the controller architecture.

Replacement Considerations

The NCP1654 is an upgraded version sharing the same control scheme and current sensing technique. Verify if additional features like brown-out detection are required before substituting.