onsemi

MC34025PG

MC34025PG Description

The MC34025PG is an offline switch-mode power supply controller designed for half-bridge applications, featuring a robust set of control features and fault protection mechanisms. Manufactured by onsemi, this IC is housed in a 16-pin DIP package and is suitable for through-hole mounting. Despite being marked as obsolete, the MC34025PG remains a reliable choice for specific power management applications due to its comprehensive feature set and proven performance.

MC34025PG Features

• Operating Temperature Range: The MC34025PG operates within a temperature range of 0°C to 70°C (TA), making it suitable for a variety of ambient conditions.
• Control Features: It includes frequency control and soft start capabilities, ensuring stable and efficient operation during startup and under varying load conditions.
• Fault Protection: The IC incorporates current limiting, which helps protect the device and connected components from potential damage due to overcurrent situations.
• Switching Frequency: The MC34025PG operates at a switching frequency of 1MHz, enabling high efficiency and compact design in power supply applications.
• Supply Voltage Range: It supports a wide supply voltage range of 8.4V to 30V, providing flexibility in power source selection.
• Start-Up Voltage: The device requires a start-up voltage of 9.2V, ensuring reliable operation once the minimum voltage threshold is met.
• Output Isolation: The MC34025PG offers isolated output, enhancing safety and reliability in power conversion circuits.
• Duty Cycle: It operates with a duty cycle of 45%, which is optimal for maintaining efficiency and stability in half-bridge configurations.
• Compliance and Packaging: The MC34025PG is REACH unaffected and has a moisture sensitivity level (MSL) of 1 (unlimited), making it suitable for long-term storage and assembly processes. It is packaged in a tube, which is ideal for bulk handling and storage.

MC34025PG Applications

The MC34025PG is ideal for a range of power management applications, particularly those requiring an offline switch-mode power supply with half-bridge topology. Specific use cases include:

• Power Supplies: Ideal for designing compact and efficient power supplies for consumer electronics, industrial equipment, and telecommunications infrastructure.
• Adapters and Chargers: Suitable for creating reliable and efficient power adapters and chargers for various devices.
• Lighting Systems: Can be used in LED lighting systems where high efficiency and stable power delivery are crucial.
• Renewable Energy Applications: Useful in small-scale renewable energy systems, such as solar-powered inverters, where isolated output and efficient power conversion are required.

Conclusion of MC34025PG

The MC34025PG, despite being marked as obsolete, remains a valuable component in the power management domain due to its robust feature set and reliable performance. Its wide operating voltage range, frequency control, soft start, and current limiting features make it a versatile choice for various applications. The device's isolated output and efficient operation at a 1MHz switching frequency further enhance its appeal for compact and high-performance power supply designs. While newer alternatives may exist, the MC34025PG continues to offer a reliable solution for engineers and designers working on legacy systems or specific power management requirements.