SRK2001A

Power Supply Controllers, Monitors Overview

The SRK2001A is a secondary-side synchronous rectification controller optimized for LLC resonant converters utilizing center-tapped secondary windings. It provides two independent high-current gate drive outputs for N-channel MOSFETs, featuring interlock logic to prevent simultaneous conduction. The device employs adaptive turn-on and turn-off algorithms to maximize MOSFET conduction time without parasitic inductance compensation. Key electrical parameters include a VCC operating voltage range of 4.5 V to 32 V, a quiescent current of 50 μA in low consumption mode, and a total turn-off delay of 35 ns. It supports frequencies up to 500 kHz and includes protection against current reversal.

Power Supply Controllers, Monitors Feature Summary

• Implements adaptive control schemes for synchronous rectification in LLC resonant converters with center-tapped secondaries
• Features dual independent gate drivers with interlock logic to prevent simultaneous MOSFET conduction
• Utilizes adaptive masking and turn-off logic to maximize conduction time and eliminate parasitic inductance compensation requirements
• Includes intelligent automatic sleep mode at light-load conditions with programmable enter/exit levels

Power Supply Controllers, Monitors Applications

• Secondary-side synchronous rectification in LLC resonant AC/DC adapters
• High-efficiency DC-DC converters for industrial applications
• Power supplies requiring compliance with stringent no-load power consumption standards

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'A' against the manufacturer's official documentation to confirm feature differentiation from the standard SRK2001 variant. Ensure compatibility with the target LLC topology and MOSFET specifications before procurement. Cross-reference the package type and pinout with the latest datasheet to avoid integration errors during design-in.

Power Supply Controllers, Monitors Selection Notes

Select this component for designs requiring high efficiency in LLC resonant topologies with center-tapped transformers. The adaptive control features reduce external component count by removing the need for parasitic inductance compensation circuits. Consider the low quiescent current for meeting strict energy efficiency regulations in light-load scenarios.

Power Supply Controllers, Monitors Part Context

The SRK2001A belongs to STMicroelectronics' family of synchronous rectification controllers designed for high-performance power conversion. It is frequently paired with primary-side controllers like the L6699 or digital combos such as the STNRG011 in evaluation boards like the EVL400W-EUPL7 and EVLSTNRG011-150 to achieve high average efficiency and low no-load consumption.

Power Supply Controllers, Monitors Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.