APR343KTR-G1

Power Supply Controllers, Monitors Overview

The APR343KTR-G1 is a secondary side synchronous rectifier controller manufactured by Diodes Incorporated. It operates within a supply voltage range of 0 V to 6 V and draws a typical operating supply current of 100 µA. The device provides an output current capability of 42 mA and supports a maximum duty cycle of 12%. Designed for AC/DC converter applications, it functions at a switching frequency of 600 kHz. The component is housed in an SOT-25 surface-mount package and is rated for an operating temperature range from -40 °C to +85 °C.

Power Supply Controllers, Monitors Feature Summary

• Integrated secondary side control for synchronous rectification in AC/DC power supplies
• Optimized for low standby power consumption with minimal supply current draw
• Designed for compact form factors using small outline transistor packages

Power Supply Controllers, Monitors Applications

• Secondary side control in flyback AC/DC converters
• Synchronous rectification in isolated power supply designs
• Low-power adapter circuits requiring efficient secondary management

Power Supply Controllers, Monitors Procurement Notes

Verify the End-of-Life status before finalizing design specifications, as discontinuance notifications have been issued for this component. Confirm that the SOT-25 package dimensions align with existing board layouts. Ensure compliance with RoHS3 and REACH regulations if required by the target market. Validate that the 600 kHz switching frequency matches the transformer design constraints.

Power Supply Controllers, Monitors Selection Notes

Select this controller for applications requiring a dedicated secondary side solution rather than integrated primary-side regulation. Consider the 0 V to 6 V supply range when designing the auxiliary winding or bias circuitry. Evaluate the 42 mA output drive capability against the gate charge requirements of the external N-channel MOSFETs to ensure adequate switching performance.

Power Supply Controllers, Monitors Part Context

This part belongs to the APR343 series of synchronous rectifier controllers from Diodes Incorporated. These components are specifically engineered to replace diodes in secondary rectification stages, thereby improving overall conversion efficiency. The series targets cost-sensitive consumer electronics and general-purpose power adapters where high integration and low quiescent current are prioritized.

Power Supply Controllers, Monitors Replacement Considerations

The APR348W6-7 is identified as a potential substitute part number within the manufacturer's portfolio.