STMicroelectronics STEVAL-ISA062V1

Overview

STEVAL-ISA062V1 from STMicroelectronics is a 6 W dual-output AC-DC switching mode power supply (SMPS) demonstration board based on the VIPER17H integrated high-voltage converter IC, delivering 5 V @ 0.5 A and 12 V @ 0.25 A across universal input (85–264 Vac), with ±1% load/cross regulation on 5 V rail and EN55022 Class B EMI compliance for industrial power design validation.

For engineers reviewing the STEVAL-ISA062V1 datasheet, STEVAL-ISA062V1 pinout, STEVAL-ISA062V1 application, or STEVAL-ISA062V1 equivalent, this board supports rapid evaluation of VIPER17H-based offline SMPS designs requiring low standby power (<50 mW), adjustable brown-in/out, output short-circuit protection, and jittered 115 kHz switching for EMI reduction.

Technical Context

The board implements a flyback topology using the VIPER17H - an integrated 800 V avalanche-rugged power switch with built-in PWM controller in BCD6 technology - operating at a fixed 115 kHz switching frequency with frequency jittering to suppress EMI peaks. It supports wide-range AC input (85–305 Vac) and delivers up to 6 W at full range or 10 W in European line (175–264 Vac).

Key control features include adjustable overload threshold, hard-short protection via transformer saturation detection, output overvoltage protection (OVP), and programmable brown-out/brown-in thresholds. The PCB layout accommodates both single- and dual-output configurations by populating only required feedback and output components.

Key Specifications

Availability

STEVAL-ISA062V1 is available at Aetrix Electronics and suitable for industrial power supply validation, embedded system auxiliary rail development, and energy-efficient AC-DC converter prototyping requiring stable component supply and documented reference design implementation.

Supply support for STEVAL-ISA062V1 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 ICs, sensors, and analog/mixed-signal devices for industrial, automotive, and consumer applications.

This board belongs to ST's STEVAL (ST Evaluation) series - purpose-built reference platforms that demonstrate validated power, sensing, and interface solutions using ST's proprietary ICs like VIPER17H for fast, compliant offline SMPS design.

FAQ

What is the primary function of the STEVAL-ISA062V1 board?

The STEVAL-ISA062V1 is a fully assembled and tested dual-output flyback SMPS demonstration board. Its core function is to validate the VIPER17H IC in real-world AC-DC conversion applications, providing measurable performance data for 5 V/0.5 A and 12 V/0.25 A outputs under universal input conditions, including EMI behavior, regulation, and protection features.

Does the board support single-output configuration?

Yes - the PCB is designed to support both single- and dual-output operation. By omitting the secondary output components (including the 12 V rectifier, filter, and feedback divider), the same board can be configured for 5 V-only operation. Transformer and feedback network selection determine output count and voltage levels.

What protection features are implemented on this board?

The board implements overvoltage protection (OVP) on both outputs, adjustable overload current limiting, output short-circuit protection (including hard-short detection via transformer saturation), brown-out and brown-in threshold adjustment, and thermal derating via ambient temperature monitoring up to 85 °C (105 °C possible with derating).

Can STEVAL-ISA062V1 be used for CE-compliant product development?

Yes - the board meets EN55022 Class B conducted and radiated EMI limits when used per the reference layout and recommended input filter components. Its jittered 115 kHz switching, optimized transformer winding, and shielded layout contribute directly to pass-level EMI performance, making it suitable as a baseline for CE-marked power supply designs.