The MC34262DG from ON Semiconductor is a versatile and efficient power factor correction (PFC) controller designed for use in switch-mode power supplies (SMPS). This integrated circuit is engineered to enhance power factor and reduce total harmonic distortion, making it an essential component for energy-conscious applications that require compliance with international power standards.

Key Features

• Integrated High-Voltage Startup: This feature allows the device to start up directly from the high-voltage line, eliminating the need for an external resistor and reducing power loss.
• Low Operating Supply Current: The MC34262DG operates with a low supply current, which contributes to the overall efficiency of the power supply.
• Trimmed 2% Internal Bandgap Reference: The internal bandgap reference is trimmed to 2%, providing accurate voltage sensing for precise control.
• Current Sensing Comparator: An integrated comparator with a programmable threshold enables accurate current sensing, which is crucial for maintaining the correct power factor.
• Drive Capability: The device can directly drive the gate of a power MOSFET, simplifying design and reducing component count.
• Protection Features: The MC34262DG includes various protection features such as undervoltage lockout (UVLO), cycle-by-cycle current limiting, and a programmable soft start.

Applications

The MC34262DG is ideal for a wide range of applications where power efficiency is a priority. It is commonly used in:

• AC-DC Adapters for laptops and personal computers
• Power supplies for TVs and monitors
• Power supplies for home appliances
• Industrial power systems
• Lighting systems

Package and Availability

The MC34262DG is available in a SOIC-8 package, providing a compact solution for space-constrained applications. ON Semiconductor's commitment to quality ensures that each device meets the highest standards for reliability and performance. For pricing, availability, and ordering information, please contact ON Semiconductor or an authorized distributor.