STMicroelectronics EVL-SRK2001-HVS

Overview

EVL-SRK2001-HVS from STMicroelectronics is an evaluation board for the SRK2001 adaptive synchronous rectification controller, designed for LLC resonant converters with output voltages up to 48 V using external high-voltage sensing MOSFETs (6.85 mΩ, 150 V rated TO-220), supporting up to 500 kHz switching frequency and dual independent N-channel gate drives with interlock logic.

For engineers reviewing the EVL-SRK2001-HVS datasheet, EVL-SRK2001-HVS pinout, EVL-SRK2001-HVS application, or EVL-SRK2001-HVS equivalent, this board enables rapid validation of adaptive turn-on/turn-off timing, ZCD_OFF–triggered fast MOSFET turn-off during above-resonance operation, and full-wave rectification with center-tapped secondary windings in high-efficiency AC/DC power supplies.

Technical Context

The board implements the SRK2001 IC's adaptive control scheme for secondary-side synchronous rectification in LLC topologies, where DVS1/DVS2 pins interface with external high-voltage sense MOSFETs in series to support >24 V outputs. Gate-drive outputs GD1/GD2 drive N-channel SR MOSFETs independently with hardware interlock to prevent shoot-through.

Operation relies on real-time voltage sensing at SVS1/SVS2 and dynamic threshold adjustment for turn-on, plus a dedicated ZCD_OFF comparator that forces immediate gate turn-off during fast load transients or above-resonance conditions-critical for maintaining efficiency and reliability in high-frequency, high-output-voltage LLC designs.

Key Specifications

Availability

EVL-SRK2001-HVS is available at Aetrix Electronics and suitable for LLC resonant converter development, high-efficiency server PSU prototyping, and 48 V telecom rectifier evaluation requiring stable component supply and reference-grade implementation fidelity.

Supply support for EVL-SRK2001-HVS includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader delivering intelligent power, analog, MEMS, and microcontroller solutions for industrial, automotive, and consumer applications.

The SRK2001 product line targets high-efficiency secondary-side synchronous rectification in resonant topologies-specifically engineered to replace diodes in LLC converters operating at ≥300 kHz with output voltages up to 48 V.

FAQ

What input/output configurations does the EVL-SRK2001-HVS support?

The board is configured for full-wave LLC rectification using a center-tapped secondary winding. It accepts 12–20 V external VCC bias and supports output voltages up to 48 V via two external 150 V TO-220 SR MOSFETs (Q501/Q502, DP083N15A). Input AC/DC stage integration requires matching transformer turns ratio and resonant tank design per AN4674.

Does the board include the SRK2001 IC and all required passive components?

Yes. U501 is the SRK2001 IC; the board includes all critical passives: gate-drive RC networks (R504/R505/C505), sense resistors (R507/R508), bootstrap capacitors (C501/C502), and ZCD conditioning circuitry (Q503, R509, C502). No additional components are needed for basic functional validation.

Can the EVL-SRK2001-HVS be used with non-center-tapped transformers?

No. The SRK2001 IC and this board are strictly designed for center-tapped secondary windings enabling full-wave synchronous rectification. The GD1/GD2 outputs and SVS1/SVS2 sensing inputs rely on symmetrical voltage polarity relative to the center tap-operation with bridge or single-ended secondaries is not supported.

How is overcurrent or shoot-through protection implemented?

Hardware interlock logic inside the SRK2001 prevents simultaneous conduction of GD1 and GD2 outputs. There is no dedicated overcurrent sensing; protection relies on accurate ZCD_OFF detection during above-resonance events and proper layout-controlled gate drive timing. Fast turn-off (<100 ns) mitigates cross-conduction risk during transient load steps.