MC34262DR2

Overview

The MC34262DR2 is a critical conduction mode (CRM) power factor controller manufactured by onsemi. Designed for pre-converters in electronic ballasts and offline power supplies, it integrates a single-quadrant multiplier, zero-current detector, and transconductance error amplifier. The device operates within a supply voltage range of 12V to 28V and supports an operating temperature from 0°C to 85°C. It utilizes an 8-SOIC surface-mount package and features an internal startup timer with a typical start current of 250 µA.

Feature Summary

• Implements critical conduction mode operation using a zero-current detector to trigger the next conduction period when inductor current reaches zero.
• Integrates a single-quadrant dual-input multiplier that maintains linear transmission curves to ensure resistive load characteristics across wide dynamic ranges.
• Includes comprehensive protection mechanisms such as overvoltage comparison, undervoltage lockout, and per-cycle current limiting via RS latch integration.

Applications

• Pre-converters for electronic ballasts
• Offline power converters

Procurement Notes

Verify component authenticity through authorized distribution channels due to potential availability of refurbished units. Confirm RoHS compliance status as original specifications may vary based on manufacturing date codes. Ensure proper handling procedures are followed during storage and assembly to maintain device integrity.

Selection Notes

Select this component for designs requiring active power factor correction in compact form factors. The integrated CRM control simplifies design by reducing output rectifier reverse recovery requirements. Evaluate thermal management capabilities within the specified 85°C maximum operating temperature limit for reliable long-term performance.

Part Context

This part belongs to the MC34262 family of power factor controllers. It shares functional similarities with the MC33262 variant but differs in commercial versus industrial temperature ratings. The DR2 suffix indicates tape and reel packaging configuration suitable for automated surface mount assembly processes.

Replacement Considerations

L6561D and L6561D013TR from STMicroelectronics are documented similar replacements.