SRK2000DTR

Power Supply Controllers, Monitors Overview

The SRK2000DTR is a smart synchronous rectification controller designed for LLC resonant converters with center-tapped secondary windings. It provides two independent high-current gate drive outputs to control N-channel Power MOSFETs, featuring interlocking logic to prevent simultaneous conduction. The device supports an operating voltage range of 4.5V to 32V and includes programmable UVLO with hysteresis. It incorporates intelligent automatic sleep mode for light-load efficiency optimization and matched turn-off thresholds. The component operates at frequencies up to 500 kHz and is available in an 8-SOIC package.

Power Supply Controllers, Monitors Feature Summary

• Implements specific control scheme for secondary side synchronous rectification in LLC resonant converters using center-tapped transformers
• Features intelligent automatic sleep mode that detects low-power conditions to reduce quiescent consumption and improve light-load efficiency
• Provides dual gate driver outputs with interlocking logic to prevent simultaneous conduction of synchronous rectifier MOSFETs
• Includes protection against current reversal and safe management of load transients, light load, and startup conditions

Power Supply Controllers, Monitors Applications

• Secondary side synchronous rectification in LLC resonant power supplies
• Power conversion systems utilizing transformer center tap secondary winding for full wave rectification
• Applications requiring optimized efficiency at light load conditions through automatic sleep mode

Power Supply Controllers, Monitors Procurement Notes

Verify the exact suffix 'DTR' against official STMicroelectronics documentation to confirm tape-and-reel packaging specifications. Ensure compatibility with the target LLC converter topology, specifically regarding the requirement for a center-tapped secondary winding. Confirm that the 4.5V to 32V supply voltage range aligns with the system design requirements before procurement.

Power Supply Controllers, Monitors Selection Notes

Select this component for designs requiring dedicated synchronous rectification control in LLC resonant topologies. It is suitable where minimizing external component count and maximizing light-load efficiency are priorities. Consider the 8-SOIC package constraints and the need for N-channel MOSFETs compatible with the provided gate drive currents. Verify that the operating frequency does not exceed the specified limit.

Power Supply Controllers, Monitors Part Context

The SRK2000 series serves as a specialized solution for enhancing efficiency in resonant power converters. Unlike general-purpose controllers, it is tailored for LLC architectures with center-tapped secondaries. The DTR variant typically denotes the reel packaging format within the product line, distinguishing it from tube-packaged equivalents like the SRK2000D.

Power Supply Controllers, Monitors Replacement Considerations

The SRK2000A is a related device in the same family offering similar synchronous rectification capabilities for LLC converters. Verify pinout and functional equivalence if substituting, noting that both devices support center-tapped secondary configurations.