STMicroelectronics STEVAL-SCR002V1

Overview

STEVAL-SCR002V1 from STMicroelectronics is an evaluation board implementing a solid-state inrush current limiter for AC-DC converters, using two TN1605H-8T 16 A / 800 V high-temperature SCRs in TO-220AB packages, driven by a Z0110MN triac and STTH110A ultrafast diodes, enabling plug-and-play integration into bridge rectifier front-ends up to 1000 W at 230 VRMS and 60°C ambient.

For engineers reviewing the STEVAL-SCR002V1 datasheet, STEVAL-SCR002V1 pinout, STEVAL-SCR002V1 application, or STEVAL-SCR002V1 equivalent, this board supports direct MCU control via its GND_DC-referenced EN input (3.3–15 V), operates across 90–265 VAC or 120–400 VDC inputs, delivers ≤4.3 ARMS continuous current, meets IEC 61000-4-4/5 immunity, and complies with EN55014/EN55022 EMI limits.

Technical Context

The STEVAL-SCR002V1 implements a non-isolated, line-synchronized SCR gate driver that derives power directly from the AC mains without reverse recovery losses. Its discrete control circuit uses a Z0110MN triac to trigger two TN1605H-8T SCRs in anti-parallel configuration, enabling precise zero-crossing switching for NTC/PTC bypass or MCU phase-control modes.

It supports all PFC operating modes - CCM, CRM, and DCM - and integrates an A-type T-filter (R1-C1-R2) on the triac gate to enhance EFT immunity per AN5649. The five-wire interface (AC Line, AC Neutral, DC+, GND_DC, EN) enables drop-in replacement of thermistor-based inrush solutions in existing AC-DC designs.

Key Specifications

Availability

STEVAL-SCR002V1 is available at Aetrix Electronics and suitable for AC-DC front-end design validation, inrush current limiter prototyping, and PFC stage integration requiring stable component supply and rapid functional verification.

Supply support for STEVAL-SCR002V1 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 headquartered in Geneva, designing and manufacturing microcontrollers, power devices, analog ICs, and silicon solutions for automotive, industrial, and consumer markets.

This board belongs to ST's STEVAL (ST Evaluation) series, engineered to accelerate development of robust, standards-compliant power conversion subsystems - specifically targeting high-reliability inrush current mitigation in AC-DC front-ends.

FAQ

What is the primary function of the STEVAL-SCR002V1?

The STEVAL-SCR002V1 is an evaluation board that implements a solid-state inrush current limiter using two TN1605H-8T SCRs and a Z0110MN triac driver. It replaces thermistors in AC-DC bridge rectifier front-ends by synchronizing SCR conduction with AC line zero-crossings, eliminating reverse recovery losses and enabling faster, more reliable turn-on than mechanical relays or NTCs.

Can STEVAL-SCR002V1 be used with PFC circuits?

Yes - it is explicitly validated for compatibility with AC-DC converters featuring Power Factor Correction in all operating modes: Continuous Conduction Mode (CCM), Critical Conduction Mode (CRM), and Discontinuous Conduction Mode (DCM). Its line-synchronized drive and non-isolated architecture ensure stable interaction with both boost and interleaved PFC topologies.

How is the enable signal interfaced?

The EN input is referenced to GND_DC (not AC ground or earth), accepting 3.3 V to 15 V logic-level signals. This allows direct connection to MCU GPIOs, isolated DC-DC output rails, or PWM controllers without optocouplers or level shifters - simplifying system integration while maintaining noise immunity via the integrated T-filter on the triac gate.

Does the board require external isolation or additional components for basic operation?

No - the STEVAL-SCR002V1 is a complete, self-contained solution. It requires only five connections: AC Line, AC Neutral, DC+, GND_DC, and EN. No external gate drivers, transformers, or isolation components are needed. The onboard T-filter (R1-C1-R2) and line-powered gate drive eliminate dependency on auxiliary supplies or isolated bias rails.