STMicroelectronics STEVAL-ISA008V1

Overview

STEVAL-ISA008V1 from STMicroelectronics is a 28 W single-layer demonstration board implementing a wide-input (90–264 V_rms) flyback SMPS using the VIPer53-E controller, delivering four regulated outputs: 3.3 V/1 A, 7 V/0.2 A, 12 V/2 A, and 35 V/10 mA - designed specifically for LCD/TV systems including scaler, microprocessor, backlight inverters, audio, and tuner circuitry.

For engineers reviewing the STEVAL-ISA008V1 datasheet, STEVAL-ISA008V1 application, STEVAL-ISA008V1 schematic, or STEVAL-ISA008V1 equivalent, this board serves as a validated reference for cost-sensitive, no-heat-sink, through-hole power supply designs targeting 15"–17" LCD-TV platforms with dual-lamp backlighting and multimedia functionality.

Technical Context

The board implements a primary-side regulated flyback topology using the VIPer53-E integrated high-voltage converter, eliminating optocoupler feedback for the main 3.3 V and 12 V rails while retaining secondary-side TL431 shunt regulation for the 7 V and 35 V outputs. Input rectification uses DF06M bridge and STTH106 fast recovery diodes; output rectification employs STPS3L60 (3.3 V), STPS8H100CF (12 V), and BYW100-200 (35 V).

EMC compliance meets EN50022 Class B; safety conforms to EN60950 with ≥6.4 mm creepage/clearance; standby power is 800 mW at 230 V_ac; overcurrent protection on all outputs includes auto-restart after fault removal.

Key Specifications

Availability

STEVAL-ISA008V1 is available at Aetrix Electronics and suitable for LCD monitor power design, TV backlight system validation, and embedded multimedia power architecture prototyping requiring stable component supply and documented reference implementation.

Supply support for STEVAL-ISA008V1 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, analog ICs, power management devices, and silicon solutions for industrial, automotive, and consumer applications.

This board belongs to ST's STEVAL (ST Evaluation) series - purpose-built demonstration platforms that validate application-specific power architectures, signal chains, and interface solutions using ST's proprietary ICs and reference topologies.

FAQ

Is STEVAL-ISA008V1 still in production?

No - STEVAL-ISA008V1 is marked "Obsolete" in ST's official documentation (Doc ID 18217 Rev 1, Nov 2010). It remains available through authorized legacy distributors and Aetrix Electronics' inventory for design reuse, failure analysis, and backward-compatible repair of legacy LCD-TV systems.

Can this board be modified for SMT assembly?

Yes - the design intentionally uses components widely available in both through-hole and SMT packages (e.g., VIPer53-E in DIP-8 and SO-8; TL431 in TO-92 and SOT-23). Layout adaptation requires re-routing only for thermal pads and high-current traces; no topology change is needed.

What protection features are implemented?

All four outputs include overcurrent protection with auto-restart upon fault clearance. The design also incorporates overvoltage clamping (1.5KE180A), input fuse (F1, 2 A), NTC inrush limiting (R1), and EN60950-compliant creepage/clearance (≥6.4 mm), but lacks dedicated overtemperature shutdown.

Does it support remote ON/OFF control?

No - the board has no dedicated enable pin or logic-controlled standby mode. Standby is achieved passively via low-quiescent VIPer53-E operation and minimized bias network losses; full restart requires AC cycle interruption or manual power cycling.