STMicroelectronics EVLVIP16L-4WFN

Overview

EVLVIP16L-4WFN from STMicroelectronics is a non-isolated flyback demonstration board built around the VIPer16LN high-voltage offline converter IC, delivering 16 V / 280 mA (4.5 W) at 60 kHz switching frequency. It implements self-supply or auxiliary-winding biasing, supports burst-mode operation for <2 mW no-load input power, and includes thermal shutdown, delayed overload protection, and open-loop failure detection when auxiliary winding is used.

For engineers reviewing the EVLVIP16L-4WFN datasheet, EVLVIP16L-4WFN pinout, EVLVIP16L-4WFN application, or EVLVIP16L-4WFN equivalent, this board serves as a validated reference design for compact, low-standby AC/DC power supplies in smart meters, IoT sensors, and industrial control interfaces requiring EMI-compliant 90–265 V_AC input operation.

Technical Context

The board implements a non-isolated flyback topology using the VIPer16LN's integrated 800 V avalanche-rugged MOSFET and current-mode PWM controller. It operates at a fixed 60 kHz switching frequency with built-in frequency jittering to reduce conducted EMI peaks.

Power delivery supports dual biasing modes: internal HV startup generator (no auxiliary winding required) or external supply via transformer auxiliary winding - enabling <100 mW standby consumption in the latter configuration. Protection features include thermal shutdown with hysteresis, delayed overload protection, and open-loop failure detection contingent on auxiliary winding usage.

Key Specifications

Availability

EVLVIP16L-4WFN is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, and IoT edge device power supply development requiring stable component supply, rapid prototyping validation, and regulatory-compliant low-standby designs.

Supply support for EVLVIP16L-4WFN 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 specializing in power management, microcontrollers, and analog ICs, with over 40 years of automotive- and industrial-grade product development experience.

This evaluation board belongs to ST's VIPer™ offline AC/DC converter product line, designed specifically for cost-sensitive, space-constrained, and energy-regulation-compliant power supplies in consumer, industrial, and metering applications.

FAQ

What is the purpose of the J and J2 jumpers on the EVLVIP16L-4WFN board?

The J jumper selects auxiliary-winding biasing (D2 + R3 path) for lower standby power; J2 enables output-derived biasing (D6 path) when V_OUT ≥ 12 V. Leaving both open activates internal HV startup generator - eliminating need for auxiliary winding and reducing BOM cost. Each configuration affects V_DD regulation dynamics and light-load efficiency.

Does the board support isolated output configurations?

No - EVLVIP16L-4WFN implements a non-isolated flyback topology, meaning primary and secondary grounds share a common reference. It is not suitable for applications requiring reinforced isolation or safety-rated galvanic separation. For isolated designs, ST recommends VIPer06-based boards like EVLVIP06LD.

How is output voltage adjusted on this demonstration board?

V_OUT is set via resistor divider R5a–R5b–R6 between output and FB pin, targeting 16 V using the formula V_OUT = 3.3 V × (1 + R6/(R5a + R5b)). R5a and R5b are split for fine-tuning; default values yield 15.7–15.9 V across line/load conditions, within ±5% spec.

What EMI compliance level does this board achieve?

Measured per CISPR 22 Class B: quasi-peak emissions at 230 V_AC/full load remain >6 dB below limit up to 30 MHz (Fig. 31–32). The Pi-filter (C1/L1/C2), transil clamp (D1/D4), and optimized layout meet commercial EMI requirements without additional shielding or filtering components.