NCP1345Q00D1R2G

AC DC Converters, Offline Switchers Overview

The NCP1345Q00D1R2G is a highly integrated quasi-resonant flyback controller designed for offline USB-PD and USB Type-C power converters. It features a dual-pin VCC architecture allowing direct connection to the auxiliary winding, which reduces external component count. The device includes primary-side output current limiting to maintain constant limits regardless of programmed voltage. Key electrical parameters include a 150V wide-range VCC architecture, an internal 700V startup circuit with X2 discharge capability, and a switching frequency of 350 kHz. The package is SOIC-9 NB.

AC DC Converters, Offline Switchers Feature Summary

• Dual-pin VCC architecture simplifies management by connecting directly to the auxiliary winding.
• Primary-side output current limiting ensures consistent limits independent of output voltage settings.
• Adaptive gate drive circuitry reduces synchronous rectifier spike voltages for lower-rated FETs.
• Auto-tuning skip mechanism adjusts entry based on output voltage for improved light-load efficiency.

AC DC Converters, Offline Switchers Applications

• USB PD phone, tablet, and notebook chargers
• Aftermarket USB PD multi-port chargers
• USB C enabled wall sockets

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix Q00 against the official datasheet to confirm the exact configuration, particularly regarding the disabling of frequency foldback as indicated in the packaging code description. Ensure compatibility with the required SOIC-9 NB package dimensions and thermal characteristics for the target application design.

AC DC Converters, Offline Switchers Selection Notes

Select this component when designing high-performance offline converters requiring USB-PD optimization. The integrated features reduce bill-of-materials complexity. Consider the 350 kHz operating frequency for magnetic size reduction. Verify that the primary-side control meets the accuracy requirements for the specific power delivery profile needed.

AC DC Converters, Offline Switchers Part Context

This part belongs to the NCP1345 series, which targets modern fast-charging standards. It differs from standard flyback controllers by integrating USB-PD specific optimizations and advanced valley-switching techniques. The series emphasizes reduced component count through integrated high-voltage startup and discharge functions.

AC DC Converters, Offline Switchers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer's latest replacement notices or equivalent series devices with matching pinouts and electrical specifications if direct substitution is required.