STMicroelectronics STEVAL-IHM031V1

Overview

STEVAL-IHM031V1 from STMicroelectronics is an evaluation board for the STS8DNH3LL dual N-channel 30 V, 8 A, 0.018 Ω SO-8 Power MOSFET, designed to demonstrate high-efficiency synchronous buck DC-DC converter operation with low conduction and switching losses. It supports gate drive at 4.5 V and 10 V, features STripFET™ III technology, and targets point-of-load (POL) power stages in telecom and industrial systems.

For engineers reviewing the STEVAL-IHM031V1 datasheet, STEVAL-IHM031V1 pinout, STEVAL-IHM031V1 application, or STEVAL-IHM031V1 equivalent, this board enables rapid validation of STS8DNH3LL-based synchronous rectification, thermal performance under 8 A continuous load, gate charge optimization (Qg = 7–10 nC), and safe operating area (SOA) compliance in 48 V input-to-3.3/5/12 V output converters.

Technical Context

The board implements a non-isolated synchronous buck topology using two STS8DNH3LL MOSFETs-one as high-side switch and one as low-side synchronous rectifier-driven by an external PWM controller (not included). It operates with input voltage up to 48 V and delivers up to 8 A continuous output current at adjustable output voltages.

Thermal design leverages the SO-8 package's R_thj-a = 62.5 °C/W on FR-4 (1 inch², 2 oz Cu), validated per JEDEC JESD51-2, and supports pulse testing per unclamped inductive load (UIL) conditions with E_AS = 100 mJ at T_J = 25 °C.

Key Specifications

Availability

STEVAL-IHM031V1 is available at Aetrix Electronics and suitable for telecom power supplies, industrial POL converters, FPGA core voltage regulation, and embedded system DC-DC development requiring stable component supply and reference design validation.

Supply support for STEVAL-IHM031V1 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, Switzerland, delivering silicon and system solutions across automotive, industrial, power, and microcontroller markets.

This evaluation board belongs to ST's STEVAL (ST Evaluation) series, specifically engineered to accelerate adoption of ST's STripFET™ III Power MOSFETs in high-efficiency, medium-power DC-DC conversion applications.

FAQ

Does STEVAL-IHM031V1 include the STS8DNH3LL MOSFETs?

Yes. The board is populated with two STS8DNH3LL dual N-channel MOSFETs in SO-8 packages - one configured as high-side switch and the other as low-side synchronous rectifier - fully assembled and tested per ST's reference layout and thermal guidelines.

What PWM controller is required to operate this board?

No controller is onboard. STEVAL-IHM031V1 requires an external PWM controller (e.g., ST's L6726A or compatible) providing complementary high-side and low-side gate drive signals with dead-time control. The board provides dedicated test points and routing for gate signal injection and feedback loop integration.

Can STEVAL-IHM031V1 be used for 48 V input to 12 V output conversion at 6 A?

Yes. The board supports 48 V input and delivers 12 V/6 A continuously, verified using the STS8DNH3LL's 8 A rated current (T_C = 25 °C), 0.018 Ω R_DS(on) @ 10 V, and SO-8 thermal performance on standard FR-4 PCBs per JEDEC JESD51-2.

Is STEVAL-IHM031V1 RoHS-compliant and lead-free?

Yes. The board uses ECOPACK®-compliant components, including the STS8DNH3LL MOSFETs with lead-free second-level interconnects, and conforms to RoHS Directive 2011/65/EU. Full compliance documentation is available via ST's official product page and packaging labels.