MC33364D1

AC DC Converters, Offline Switchers Overview

The MC33364D1 is an offline switch controller from onsemi's GreenLine series, designed for flyback topology applications. It operates as a variable frequency SMPS controller in critical conduction mode, optimized for high-density power supplies with reduced component count and low power dissipation. The device features a switching frequency of 126kHz and supports a supply voltage range of 7.6V to 16V. It includes a high-voltage startup circuit that saves approximately 0.7W compared to resistor bootstrapped circuits. The IC offers over-temperature protection, shutdown capability, and leading edge blanking for noise immunity. It is housed in an 8-SOIC package and rated for an operating temperature range of -25°C to +125°C.

AC DC Converters, Offline Switchers Feature Summary

• Critical conduction mode operation for high-density power supply designs
• Integrated high-voltage startup circuit reducing external component count and power loss
• Built-in watchdog timer to initiate switching and ensure reliable start-up
• Leading edge blanking feature provides enhanced noise immunity

AC DC Converters, Offline Switchers Applications

• High-density AC-DC power supplies
• Flyback converter topologies requiring minimum board area
• Applications demanding reduced component count and low power dissipation
• Offline switched-mode power supply (SMPS) controllers

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific ordering suffix and RoHS compliance status, as the MC33364D1 may have variants such as the D1G or D1R2G. Confirm current availability status, as this part number has been reported as discontinued in some distributor listings. Ensure the selected variant matches the required packaging type and environmental specifications for the target application.

AC DC Converters, Offline Switchers Selection Notes

Select the MC33364D1 when designing flyback converters that require critical conduction mode operation to minimize EMI and improve efficiency at light loads. Consider the integrated startup feature if reducing external bias components is a priority. Evaluate the thermal performance within the specified -25°C to +125°C range and ensure the 8-SOIC package fits the PCB layout constraints.

AC DC Converters, Offline Switchers Part Context

The MC33364D1 belongs to onsemi's GreenLine series of SMPS controllers. This series focuses on optimizing power density and reducing system cost through integration. The device is part of a broader family including variants like the MC33364D2 and MC33364DR2, which share similar control architectures but may differ in pinout or specific feature sets for different transformer configurations.

AC DC Converters, Offline Switchers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The MC33364D1 is listed as discontinued; consult manufacturer resources for potential end-of-life alternatives.