SRK2001LTR

Power Supply Controllers, Monitors Overview

The SRK2001LTR is an adaptive synchronous rectification controller designed for LLC resonant converters with center-tap secondary windings. It provides dual high-current gate drive outputs for N-channel MOSFETs, featuring interlock logic to prevent simultaneous conduction. The device operates within a VCC range of 4.5 V to 32 V and supports frequencies up to 500 kHz. Key electrical parameters include a 50 μA quiescent current in low consumption mode and a 35 ns total delay at turn-off. It utilizes high-voltage drain-to-source Kelvin sensing and includes protection against current reversal.

Power Supply Controllers, Monitors Feature Summary

• Implements adaptive algorithms for turn-on and turn-off to maximize conduction time and eliminate parasitic inductance compensation circuits.
• Features intelligent automatic sleep mode with user-programmable enter/exit load levels for stringent light-load power consumption requirements.
• Includes ZCD_OFF comparator mechanism for very fast MOSFET turn-off during fast load transitions or above-resonance operation.

Power Supply Controllers, Monitors Applications

• Secondary-side synchronous rectification in LLC resonant converters
• Full-wave rectification using transformers with center-tap secondary windings
• Substitution for rectifier diodes in existing converter designs

Power Supply Controllers, Monitors Procurement Notes

Verify the specific package type and tape-and-reel configuration associated with the LTR suffix against the official datasheet before procurement. Ensure that the ordering information matches the exact pinout and marking requirements for your PCB layout. Confirm RoHS compliance status and any regional regulatory certifications required for your target market. Cross-reference the manufacturer's part number with distributor catalogs to avoid counterfeit components.

Power Supply Controllers, Monitors Selection Notes

Select this component when designing LLC resonant converters requiring high efficiency and low standby power consumption. It is suitable for applications utilizing N-channel power MOSFETs on the secondary side. Consider its adaptive control scheme for designs aiming to minimize external component count and simplify thermal management. Ensure the input voltage range and switching frequency capabilities align with the system's operational requirements.

Power Supply Controllers, Monitors Part Context

The SRK2001 is part of STMicroelectronics' portfolio of power management ICs focused on efficient energy conversion. It complements primary-side controllers like the L6699 and L4985A in complete AC/DC adapter solutions. The device is often evaluated using boards such as the STEVAL-ISA165V1, which demonstrates its performance with specific MOSFETs. This integration supports industrial and consumer applications demanding high power density and strict energy efficiency standards.

Power Supply Controllers, Monitors Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing designs by comparing pinouts, electrical characteristics, and control logic. Consult STMicroelectronics technical support for alternative recommendations if the SRK2001LTR is unavailable. Ensure any replacement maintains the required adaptive synchronization and protection features for LLC resonant topologies.