AP3771AK6TR-BG1

Overview

The AP3771AK6TR-BG1 is a high-performance AC/DC power supply controller designed for battery charger and adapter applications. It utilizes primary side regulation to eliminate the need for optocouplers, thereby reducing component count and improving reliability. The device operates with an integrated high-voltage startup circuit and supports flyback topologies. Key electrical characteristics include a supply voltage range of up to 30V and a typical supply current of 400 μA. It features comprehensive protection mechanisms including overvoltage, overcurrent, and thermal shutdown. The controller is housed in a compact SOT-26 surface-mount package suitable for space-constrained designs.

Feature Summary

• Primary side regulation architecture eliminates optocoupler requirements
• Integrated high-voltage startup circuit simplifies design
• Comprehensive protection against overvoltage, overcurrent, and thermal events

Applications

• Battery chargers
• AC/DC adapters
• Low-power offline power supplies

Procurement Notes

Verify the specific suffix 'BG1' against the manufacturer's latest datasheet to confirm pinout and functional compatibility. Check for obsolescence notices as Diodes Incorporated may update product lines. Ensure the ordering quantity aligns with standard reel sizes if applicable. Confirm RoHS compliance status for your region's regulatory requirements before finalizing procurement.

Selection Notes

Select this component for applications requiring cost-effective primary side regulation without isolated feedback loops. It is suitable for low-to-medium power AC/DC conversion where size constraints favor the SOT-26 package. Consider the operating temperature range and supply voltage limits relative to your specific input line conditions. Evaluate the total system efficiency impact of primary side regulation versus secondary side sensing for your application.

Part Context

This part belongs to the AP3771 family of AC/DC controllers from Diodes Incorporated. It is part of the Gen3 series focusing on low-power offline applications. The 'AK6' indicates the specific package variant, while 'BG1' denotes the tape and reel configuration. It serves as a direct replacement for older generations of primary-side regulated controllers in similar form factors.

Replacement Considerations

Check for cross-reference parts within the same manufacturer's portfolio that share the SOT-26 footprint. Verify if alternative primary-side controllers offer improved efficiency or lower standby power consumption. Ensure any substitute maintains the same startup voltage characteristics and protection thresholds.