NCP1380BDR2G

AC DC Converters, Offline Switchers Overview

The NCP1380BDR2G is a high-performance quasi-resonant current mode controller designed for offline power supplies. It operates in flyback topology with valley switching to minimize switching losses. The device features an integrated high-voltage startup circuit and supports VCC supply ranges from 8V to 28V. It includes built-in over-power protection, short-circuit protection with auto-recovery, and brown-out detection. The component is housed in an SOIC-8 surface-mount package.

AC DC Converters, Offline Switchers Feature Summary

• Quasi-resonant peak current mode control with valley lockout for reduced switching losses
• Integrated over-power protection (OPP) adjusting peak current based on input voltage
• Short-circuit protection with fixed timer and automatic recovery capability
• Wide VCC operating range supporting up to 28V for enhanced stability

AC DC Converters, Offline Switchers Applications

• High-power AC-DC adapters
• Offline power supply designs
• LED driver circuits

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'B' indicates the automatic recovery mode for short-circuit protection, distinguishing it from latch-up variants. Confirm the SOIC-8 package marking matches official datasheet silkscreen specifications. Ensure the ordering part number aligns with the manufacturer's current active status and RoHS compliance requirements before finalizing procurement.

AC DC Converters, Offline Switchers Selection Notes

Select this controller for applications requiring high efficiency at light loads through variable frequency operation. Consider the auto-recovery feature if system restart after fault is preferred over manual intervention. Evaluate the thermal performance within the specified -40°C to 125°C operating range. Ensure the external MOSFET gate drive capability meets the load requirements of the target design.

AC DC Converters, Offline Switchers Part Context

This component belongs to the NCP1380 family of quasi-resonant controllers by onsemi. It is engineered for general-purpose offline power conversion where energy efficiency standards are critical. The family offers various protection configurations and pin-compatible options to simplify design iterations across different power levels and regulatory requirements.

AC DC Converters, Offline Switchers Replacement Considerations

NCP1380DDR2G: Verify if the 'D' suffix denotes a different protection mode or packaging variant compared to the 'B' suffix.

AC DC Converters, Offline Switchers FAQ

What type of protection mode does the NCP1380BDR2G support?

The B suffix indicates that the controller features an automatic recovery mode for short-circuit and overload protection.

How does the controller optimize efficiency at light loads?

It utilizes valley locking and variable frequency modes to reduce switching frequency and losses when the load decreases.