SRK2001

Power Supply Controllers, Monitors Overview

The SRK2001 is an adaptive synchronous rectification controller designed for LLC resonant converters utilizing a center-tapped secondary winding. 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 conduction time and eliminate parasitic inductance compensation requirements. It operates within a VCC range of 4.5 V to 32 V and supports frequencies up to 500 kHz. Key features include low consumption mode with 50 μA quiescent current, intelligent sleep mode, and protection against current reversal.

Power Supply Controllers, Monitors Feature Summary

• Implements adaptive control schemes for secondary-side synchronous rectification in LLC resonant converters
• Provides dual independent gate drivers with interlock logic to prevent simultaneous MOSFET conduction
• Features intelligent automatic sleep mode with programmable enter/exit load levels for light-load efficiency
• Includes ZCD_OFF comparator mechanism for fast MOSFET turn-off during fast load transitions

Power Supply Controllers, Monitors Applications

• Secondary-side synchronous rectification in LLC resonant converters with center-tapped transformers
• High-efficiency AC/DC adapters requiring low no-load power consumption
• Industrial DC-DC converters prioritizing compact size and high power density
• Power supplies utilizing standard level N-channel MOSFETs for full-wave rectification

Power Supply Controllers, Monitors Procurement Notes

Verify the specific package variant and ordering suffix when sourcing, as STMicroelectronics may offer different pin configurations or thermal options. Confirm compatibility with the target N-channel MOSFET voltage ratings and gate charge specifications. Ensure the application design accounts for the Kelvin sensing connections required for accurate drain-to-source voltage monitoring. Review the latest datasheet for any updates on recommended operating conditions and thermal management guidelines.

Power Supply Controllers, Monitors Selection Notes

Select the SRK2001 for applications requiring optimized synchronous rectification in LLC topologies with center-tapped secondaries. It is suitable for designs aiming to minimize heat sink size through high rectification efficiency. Consider this component when strict light-load and no-load power consumption limits must be met. It is compatible with standard level MOSFETs and simplifies design by removing the need for external parasitic inductance compensation circuits.

Power Supply Controllers, Monitors Part Context

The SRK2001 belongs to STMicroelectronics' portfolio of power management ICs focused on efficient energy conversion. It is frequently paired with LLC controllers such as the L6699 or STNRG599A in demonstration boards like EVL400W-EUPL7 and EVL250WMG1L. These evaluations highlight its role in achieving high efficiency and compliance with stringent energy standards like European CoC Tier 2 and ENERGY STAR.

Power Supply Controllers, Monitors Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate alternative synchronous rectification controllers based on functional equivalence, specifically ensuring support for center-tapped LLC topologies, dual gate drive capability, and similar adaptive timing features.