NCP1910B65DWR2G

Overview

The NCP1910B65DWR2G is a high-performance combo controller designed for ATX power supplies, housed in a 24-SOIC package. It integrates a Power Factor Correction (PFC) controller operating in Continuous Conduction Mode (CCM) with a switching frequency of 245 kHz and an LLC resonant controller. The device supports half-bridge topology for the LLC stage and includes advanced features such as adjustable frequency foldback to reduce light-load losses. It provides dedicated pins for primary-to-secondary side handshaking, including Power Good signaling via optocoupler control. Protection mechanisms include overvoltage input redundancy and a fast fault input that triggers auto-recovery soft-start sequences during overcurrent conditions.

Feature Summary

• Integrates CCM PFC controller and LLC resonant controller in a single SO-24WB package
• Supports primary-to-secondary side handshaking with dedicated Power Good and control pins
• Features adjustable frequency foldback to minimize switching losses at light loads
• Includes fast fault input for immediate reaction to overcurrent conditions with auto-recovery

Applications

• ATX power supplies
• Next-generation flat panel TV converters
• Offline power supplies requiring strict signal sequencing

Procurement Notes

Verify component authenticity through authorized onsemi distributors or certified partners. Confirm RoHS3 compliance and REACH status prior to integration. Check for recent Product Change Notifications regarding wafer fab or design revisions. Ensure storage conditions meet Moisture Sensitivity Level 3 requirements. Validate pinout compatibility with existing PCB layouts before finalizing procurement orders.

Selection Notes

Select this component for designs requiring integrated PFC and LLC control in a compact form factor. Suitable for applications needing precise timing between primary and secondary sides. Consider thermal management due to SO-24WB package constraints. Verify input voltage range compatibility with system specifications. Evaluate cost-effectiveness compared to discrete solutions for high-volume production runs.

Part Context

Part of the NCP1910 family of offline controllers from onsemi. Designed specifically for high-efficiency AC/DC conversion in consumer electronics. Shares common interface characteristics with other NCP1910 variants but differs in switching frequency and specific feature sets. Part of onsemi's portfolio aimed at meeting stringent energy efficiency standards for modern power adapters.

Replacement Considerations

NCP1910A100DWR2G is a related variant within the same family offering different switching frequencies and operational modes. Verify functional equivalence regarding pinout and control logic before substitution. Note that NCP1910A100DWR2G is marked as obsolete, whereas NCP1910B65DWR2G remains active. Consult official datasheets for detailed parameter comparisons.