MC34262D

Overview

The MC34262D is an active power factor controller designed for pre-converters in electronic ballasts and offline power supplies. It operates in critical conduction mode (CRM) with a supply voltage range of 12V to 28V and a maximum switching frequency of 50 kHz. The device features an internal startup timer, single-quadrant multiplier, zero-current detector, transconductance error amplifier, and current detection comparator. It supports surface-mount installation in an 8-SOIC package and functions within an operating temperature range of 0°C to 85°C.

Feature Summary

• Single-quadrant multiplier maintains linear transmission curves to reduce line current distortion
• Zero-current detector triggers next conduction time when inductor current reaches zero
• Integrated protection mechanisms include overvoltage comparison, undervoltage lockout, and cycle-by-cycle current limiting

Applications

• Pre-converters for electronic ballasts
• Offline power converters
• Active power factor correction circuits

Procurement Notes

Verify component status as the MC34262D is listed as obsolete by the manufacturer. Confirm RoHS compliance requirements against specific datasheet versions, as some records indicate non-compliance. Ensure replacement components like the L6561D are validated for pin compatibility and electrical specifications before integration into existing designs.

Selection Notes

Select this component for applications requiring critical conduction mode PFC control. Verify that the input voltage range aligns with the 12V to 28V specification. Consider the 8-SOIC package constraints for thermal management and PCB layout. Evaluate alternative sources due to the discontinued status of this specific part number.

Part Context

This device belongs to the MC34262/MC33262 family of power factor controllers manufactured by onsemi. These controllers are engineered to improve power factor and reduce harmonic content in power conversion systems. The D suffix indicates the SOIC surface-mount package variant.

Replacement Considerations

Publicly confirmed substitute part numbers include L6561D and L6561D013TR from STMicroelectronics.