SRK1001TR

Power Supply Controllers, Monitors Overview

The SRK1001TR is an adaptive synchronous rectification controller designed for secondary-side synchronous rectification in flyback converters. It supports operation in quasi-resonant (QR) and mixed CCM/DCM fixed frequency circuits. The device features a wide VCC operating voltage range of 3.7V to 32V and supports CC regulation down to 2V output. It includes high-current gate-drive outputs for N-channel MOSFETs, a high-voltage sensing input with 185V AMR, and operates at frequencies up to 300kHz. The IC enters low consumption mode with 170µA quiescent current under light load conditions.

Power Supply Controllers, Monitors Feature Summary

• Adaptive turn-off logic maximizes conduction time while eliminating parasitic inductance effects
• Fast turn-on with minimum delay ensures efficient switching as body diode current begins
• Low consumption mode activates during primary burst-mode or light load to improve efficiency
• High-voltage sensing input monitors SR MOSFET drain-source voltage

Power Supply Controllers, Monitors Applications

• Flyback converter secondary side synchronous rectification
• Quasi-resonant (QR) power supply designs
• Mixed CCM/DCM fixed frequency applications

Power Supply Controllers, Monitors Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors due to obsolete status. Confirm package integrity upon receipt as the part is supplied in reel packaging. Check datasheet revisions for any parameter updates prior to integration into final designs.

Power Supply Controllers, Monitors Selection Notes

Select this controller for flyback topologies requiring optimized synchronous rectification. Ensure the design supports QR or mixed CCM/DCM modes. Verify that the N-channel MOSFET gate drive requirements match the controller's output capabilities. Consider the 3.7V to 32V VCC range for compatibility with various auxiliary winding voltages.

Power Supply Controllers, Monitors Part Context

The SRK1001 belongs to STMicroelectronics' SRK1000 family of adaptive synchronous rectification controllers. It is specifically engineered for flyback converters, offering enhanced performance over traditional diode rectification by reducing conduction losses. The TR suffix indicates tape and reel packaging for automated assembly processes.

Power Supply Controllers, Monitors Replacement Considerations

The SRK1001 is marked as obsolete. No direct public substitute part numbers are confirmed in the provided documentation. Designers should consult STMicroelectronics for recommended alternatives or evaluate legacy stock availability.