STMicroelectronics STEVAL-ISV005V2

Overview

STEVAL-ISV005V2 from STMicroelectronics is a 240 W photovoltaic battery charger demonstration board built around the SPV1020 monolithic DC-DC boost converter, featuring embedded MPPT with 0.2% duty cycle accuracy, 0–40 V input range, and up to 98% peak efficiency for solar energy harvesting systems.

For engineers reviewing the STEVAL-ISV005V2 datasheet, STEVAL-ISV005V2 pinout, STEVAL-ISV005V2 application, or STEVAL-ISV005V2 equivalent, this board enables rapid validation of distributed PV panel-level MPPT, burst-mode operation under low irradiance, output current limiting via external SEA05, and SPI-configurable 100 kHz switching frequency with 5–90% duty cycle control.

Technical Context

The board implements a fixed-frequency PWM boost topology using the SPV1020's integrated high-side and synchronous rectifier MOSFETs, eliminating external power switches and electrolytic capacitors. Its 4-phase interleaved architecture reduces input/output ripple and extends lifetime.

MPPT is executed locally on each PV panel via the embedded "Perturb & Observe" algorithm, enabling independent optimization regardless of temperature or irradiance variation. Safety logic halts switching during overvoltage, overcurrent (via R9/R10 sensing), or overtemperature events.

Key Specifications

Availability

STEVAL-ISV005V2 is available at Aetrix Electronics and suitable for solar micro-inverters, off-grid battery charging stations, and PV module-integrated electronics requiring stable component supply and validated MPPT reference design.

Supply support for STEVAL-ISV005V2 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 analog, MCU, power, and sensor solutions for industrial, automotive, and renewable energy markets.

The STEVAL-ISV005V2 belongs to ST's Solar Energy Application Evaluation Kits product line, developed to accelerate deployment of panel-level MPPT architectures that replace bypass diodes and improve system-level yield under mismatched or shaded conditions.

FAQ

What is the role of the SEA05 on the STEVAL-ISV005V2 board?

The SEA05 is an external current-sense amplifier connected to the SPV1020's output stage. It works with resistors R9 and R10 to implement precise output current limiting-a function not integrated into the SPV1020 IC itself-enabling safe battery charging with programmable CC/CV profiles.

Does the STEVAL-ISV005V2 support communication with a host controller?

Yes, the board provides an SPI interface directly connected to the SPV1020, allowing real-time readback of internal registers, configuration of MPPT parameters, adjustment of switching frequency, and monitoring of fault status such as overvoltage or thermal shutdown events.

Can the STEVAL-ISV005V2 operate without sunlight or with very low irradiance?

Yes-the board automatically transitions to burst mode when solar input falls below operational thresholds, maintaining regulation while reducing standby power consumption. The SPV1020's UVLO threshold is 6.5 V, but bypass diodes (SPV1001N40) allow start-up even below that level in multi-panel series strings.

How does the 4-phase interleaved topology improve reliability?

The interleaved structure distributes current stress across four parallel boost phases, lowering RMS current per phase, reducing thermal hotspots, and eliminating the need for lifetime-limiting electrolytic capacitors-replacing them with long-life ceramic or film types for >25-year field operation in solar applications.