STMicroelectronics STEVAL-ISA096V1

Overview

STEVAL-ISA096V1 from STMicroelectronics is a buck-boost topology auxiliary switched-mode power supply (SMPS) demonstration board based on the VIPer06 monolithic converter, delivering −12 VDC ±10% at 150 mA (1.8 W), with 85–264 V_RMS AC input, <30 mW standby power at 264 V_AC, and 4 kV/8 mm isolation. It targets low-power auxiliary rail generation in industrial and consumer power systems.

For engineers reviewing the STEVAL-ISA096V1 datasheet, STEVAL-ISA096V1 application, STEVAL-ISA096V1 schematic, or STEVAL-ISA096V1 bill of materials, this evaluation board enables rapid validation of VIPer06-based isolated buck-boost designs under universal AC input, EMI Class B compliance, and short-circuit protected operation.

Technical Context

The board implements a non-isolated buck-boost SMPS using the VIPer06 - an integrated 800 V avalanche-rugged MOSFET and current-mode PWM controller - operating in discontinuous conduction mode (DCM) for stable regulation across wide line variations. Feedback is derived via optocoupler-coupled secondary-side sensing to maintain tight output voltage accuracy.

EMI filtering meets EN55022 Class B requirements through discrete X/Y-capacitor network and common-mode choke; PCB layout follows ST's recommended creepage/clearance rules for 4 kV reinforced isolation between primary and secondary sides.

Key Specifications

Availability

STEVAL-ISA096V1 is available at Aetrix Electronics and suitable for industrial control panels, smart meter auxiliary supplies, HVAC system controllers, and IoT gateway power management requiring stable component supply and validated reference design support.

Supply support for STEVAL-ISA096V1 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, analog chips, and MEMS sensors for industrial, automotive, and consumer applications.

The STEVAL series comprises ST's official evaluation and demonstration platforms - engineered to accelerate prototyping and qualification of ST's power converters, motor drivers, and interface ICs in real-world system contexts.

FAQ

What is the primary function of the STEVAL-ISA096V1 board?

The STEVAL-ISA096V1 is a demonstration board for evaluating the VIPer06 monolithic SMPS controller in a buck-boost configuration. Its core function is to generate a regulated −12 VDC auxiliary supply from universal AC mains, supporting design verification of isolation, efficiency, EMI, and protection features before full-system integration.

Does the board provide galvanic isolation between input and output?

Yes - the board achieves reinforced galvanic isolation rated at 4 kV_AC with 8 mm clearance and creepage, implemented via an isolation transformer and optocoupler feedback path. This ensures safety-compliant separation between primary high-voltage and secondary low-voltage circuits.

Can the output voltage be adjusted to +12 V or other values?

No - the board is fixed for −12 VDC output due to its buck-boost transformer winding polarity and feedback resistor network. Modifying output polarity or level requires redesigning the transformer, rectification stage, and feedback divider, which is not supported by the stock layout or firmware.

Is the STEVAL-ISA096V1 RoHS compliant and certified for EMC?

Yes - the board is RoHS compliant per EU Directive 2011/65/EU, and its conducted/radiated emissions meet EN55022 Class B limits. Full test reports are included in the official documentation (Doc ID 022624 Rev 1), confirming compliance for residential and commercial deployment.