MC33364D

AC DC Converters, Offline Switchers Overview

The MC33364D is a variable frequency Switch-Mode Power Supply (SMPS) controller from onsemi, operating in critical conduction mode. It utilizes the GreenLine topology for flyback converters with an 8-pin SOIC package. Key electrical parameters include a switching frequency of 126 kHz and a maximum duty cycle of 50%. The device supports an output voltage range of 4.9 V to 5.2 V and provides an output current capability of 600 mA. It operates within a temperature range of -25°C to +125°C.

AC DC Converters, Offline Switchers Feature Summary

• Integrates lossless off-line startup circuitry to reduce power dissipation compared to resistor bootstrapped designs.
• Includes leading edge blanking for enhanced noise immunity during switching operations.
• Features a watchdog timer mechanism to initiate switching sequences reliably.
• Provides over-temperature protection and shutdown capability for system safety.

AC DC Converters, Offline Switchers Applications

• High density power supplies requiring minimum board area
• Flyback converter topologies with reduced component count
• Low power dissipation AC-DC conversion systems

AC DC Converters, Offline Switchers Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for End-of-Life (EOL) notices, as availability may be restricted. Ensure packaging specifications match design requirements before finalizing procurement orders.

AC DC Converters, Offline Switchers Selection Notes

Select this controller for applications prioritizing high power density and minimal external component usage. The integrated high-voltage startup reduces standby power consumption. Consider the critical conduction mode operation for optimizing efficiency in specific load ranges while managing electromagnetic interference through optional frequency clamping.

AC DC Converters, Offline Switchers Part Context

Part of the GreenLine series, the MC33364D is designed for offline switch-mode power supplies. It emphasizes integration to lower bill-of-materials costs and simplify layout. The device targets consumer and industrial adapters where space constraints and thermal performance are critical design factors.

AC DC Converters, Offline Switchers Replacement Considerations

MC33364D1G and MC33364D2R2G are documented variants within the same family. Verify pin compatibility and specific suffix differences before substitution. Cross-reference datasheets for any functional deviations in control logic or protection thresholds.