onsemi

MC34025P  

AC DC Converters, Offline Switches

MC34025P Description

The MC34025P from onsemi is a high-performance offline half-bridge PWM controller designed for AC/DC power conversion applications. Housed in a 16-pin DIP package, this IC operates within a wide supply voltage range of 8.4V to 30V, making it suitable for diverse power supply designs. With a switching frequency of up to 1MHz, it enables compact and efficient power conversion solutions. The device supports isolated outputs and features current limiting for robust fault protection, ensuring reliable operation in demanding environments. Although marked as obsolete, it remains a viable choice for legacy systems due to its proven performance.

MC34025P Features

• Frequency Control & Soft Start: Ensures smooth power-up and adjustable switching frequency for optimized performance.
• Current Limiting Protection: Safeguards against overcurrent conditions, enhancing system reliability.
• Wide Operating Voltage (8.4V–30V): Compatible with a broad range of input sources.
• 1MHz Switching Frequency: Enables high-efficiency, high-density power designs.
• 45% Duty Cycle: Balanced power delivery for half-bridge topologies.
• Through-Hole Mounting (16DIP): Simplifies prototyping and legacy system integration.
• Start-Up Voltage of 9.2V: Ensures reliable initialization under low-voltage conditions.

MC34025P Applications

The MC34025P is ideal for:

• Offline Switch-Mode Power Supplies (SMPS): Used in AC/DC converters for industrial and consumer electronics.
• Half-Bridge Converters: Provides precise PWM control for resonant and non-resonant designs.
• LED Drivers: Supports high-frequency switching for efficient LED power management.
• Telecom Power Systems: Reliable performance in isolated power modules.
• Legacy Equipment Upgrades: Suitable for maintaining or refurbishing older power systems.

Conclusion of MC34025P

The MC34025P offers a robust combination of high-frequency switching, fault protection, and flexible voltage operation, making it a dependable choice for offline power conversion. While newer alternatives may exist, its proven design and isolation capabilities ensure continued relevance in specific applications. Engineers working on half-bridge topologies or legacy systems will find this IC a reliable solution for efficient power management.

MC34025P Documents

Download datasheets and manufacturer documentation for MC34025P

Datasheets :

MC34025, 33025      

PCN Obsolescence/ EOL :

Multiple Devices 11/Feb/2009      

HTML Datasheet :

MC34025, 33025      

Environmental Information :

onsemi RoHS       onsemi REACH