AOZ7203AV

Overview

The AOZ7203AV is a high-voltage active bridge rectifier controller manufactured by Alpha & Omega Semiconductor Inc. It operates within an input voltage range of 9V to 500V and supports switching frequencies up to 100kHz. The device features a supply voltage range of 4.5V to 18V and functions reliably across a temperature range of -40°C to 125°C. Packaged in a compact DFN5x7 format, it integrates control logic for external N-channel MOSFETs to replace traditional diodes.

Feature Summary

• Enables synchronous rectification by driving external N-channel MOSFETs to minimize forward voltage drop
• Provides self-supplying operation with ultra-low quiescent current for enhanced efficiency
• Supports bidirectional power flow and electrical isolation suitable for high-density designs

Applications

• AC/DC power supplies for adapters and chargers
• Server and telecommunications equipment power systems
• High-efficiency offline active bridge rectifiers

Procurement Notes

Verify the specific suffix AV against manufacturer documentation to confirm pinout and thermal pad configuration. Confirm RoHS compliance status through official datasheets. Check for recent Product Change Notifications regarding package or material updates. Ensure ordering quantities align with standard tape-and-reel specifications provided by authorized distributors.

Selection Notes

Select this component when designing AC/DC converters requiring high efficiency and reduced thermal management complexity. It serves as a direct replacement for traditional diode bridges in applications demanding lower conduction losses. Evaluate compatibility with external MOSFET Rds(on) ratings to optimize system performance and ensure adequate heat dissipation within the DFN5x7 footprint constraints.

Part Context

This controller belongs to the AlphaZBL series, designed specifically for high-efficiency AC/DC power supplies. It replaces traditional bridge rectifier diodes with active MOSFETs to significantly reduce power loss. The series includes both independent controllers and integrated MOSFET variants to accommodate diverse design requirements and packaging preferences.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source data.