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STMicroelectronics EVL4984-350W

Name: EVL4984-350W
Brand: STMicroelectronics
SKU: EVL4984-350W
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: EVL4984-350W

Manufacturer:: STMicroelectronics

Category:: DC/DC & AC/DC (Off-Line) SMPS Evaluation Boards

Package:

Datasheet:: EVL4984-350W.pdf

Description:: EVAL BOARD FOR L4984D

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,873

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Product details

Overview

EVL4984-350W from STMicroelectronics is a 350 W continuous conduction mode (CCM) power factor correction (PFC) pre-regulator demonstration board based on the L4984D controller IC. It implements a boost-type PFC stage with 90–265 V_AC input, regulated 400 V_DC output, 70 kHz switching frequency, ≥94% efficiency at full load, and compliance with IEC61000-3-2 Class-D and JEITA-MITI standards.

For engineers reviewing the EVL4984-350W datasheet, EVL4984-350W application notes, EVL4984-350W schematic, or EVL4984-350W evaluation board layout, this page delivers verified technical context, key performance specifications, supply-chain availability, manufacturer background, and targeted design FAQs - all grounded in ST's official documentation (DocID023720 Rev 2).

Technical Context

The EVL4984-350W implements a single-stage, CCM boost PFC topology using two parallel STF21N65M5 650 V MOSFETs (Q1/Q2), a 700 µH custom PFC inductor (L3), and dual 100 µF/450 V output capacitors (C3/C4). Input EMI filtering includes common-mode choke L2 and differential-mode components L1, C1, and C2.

L4984D control functions include RMS mains sensing via VFF pin (#5), dynamic OVP via PFC_OK pin (#6), open-loop protection monitoring INV (#1) and PFC_OK (#6), brownout detection, and remote ON/OFF via J3 pin #3. The board supports hold-up time of 20 ms to 300 V and peak-to-peak output ripple ≤12.5 V at 2×f_L.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	90–265 V_AC, enabling global mains compatibility without manual range switching.
Output Voltage	Regulated 400 V_DC ±1%, providing stable DC bus for downstream SMPS stages.
Rated Power	350 W continuous, validated across 47–63 Hz line frequencies and full-load to 70 W light-load operation.
Switching Frequency	70 kHz fixed, set by external 680 pF capacitor (C14) on TIMER pin, balancing EMI and efficiency.
Efficiency	≥94% at 90 V_AC/350 W, confirming high-conversion performance under worst-case low-line conditions.
Harmonic Compliance	Fully compliant with EN61000-3-2 Class-D and JEITA-MITI Class-D at full and 70 W load.
Hold-up Time	20 ms to 300 V_DC, supporting uninterrupted operation during brief AC dips per industrial requirements.

Availability

EVL4984-350W is available at Aetrix Electronics and suitable for industrial power supplies, server front-end converters, and medical-grade AC-DC adapters requiring stable component supply, regulatory-compliant PFC validation, and reference-grade thermal and EMI design.

Supply support for EVL4984-350W 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, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The EVL4984-350W belongs to ST's evaluation board portfolio for power management ICs, specifically developed to accelerate adoption of the L4984D CCM PFC controller in high-efficiency, standards-compliant AC-DC conversion systems.

FAQ

What is the primary function of the EVL4984-350W demonstration board?

The EVL4984-350W is a fully assembled, tested reference design that demonstrates the L4984D CCM PFC controller in a 350 W boost converter. Its purpose is to validate harmonic reduction, efficiency, and stability under real-world 90–265 V_AC inputs while meeting EN61000-3-2 and JEITA-MITI Class-D limits - not for end-product integration but for design verification and prototyping.

Does the board include an integrated L4984D power supply?

No. The L4984D requires an external bias supply connected between pins #1 (VCC) and #2 (GND) of header J3. The board does not contain an auxiliary power converter; users must provide a stable 12 V source capable of delivering sufficient current for the controller and gate drivers.

How is overvoltage protection implemented on this board?

OVP uses dynamic feedback via the PFC_OK pin (#6): when sensed output voltage exceeds threshold (2.5 V), switching halts until voltage falls below 2.4 V. Additionally, open-loop protection latches off the controller if PFC_OK > 2.5 V *and* INV < 1.66 V simultaneously - preventing runaway during feedback failure.

Can the EVL4984-350W be used directly in production systems?

No. It is a demonstration board intended for lab evaluation and reference design extraction only. Its single-sided 70 µm CEM-1 PCB, non-optimized thermal layout, and lack of safety certification (e.g., UL/EN 62368-1) preclude direct production use. Engineers should extract schematics and BOM for custom-designed, certified implementations.

EVL4984-350W Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Packaging:: Bulk

Product Status:: Active

Main Purpose:: AC/DC, Primary and Secondary Side with PFC

Outputs and Type:: 1 Non-Isolated Output

Voltage - Output:: 350 W

Current - Output:: 400V

Voltage - Input:: -

Regulator Topology:: 90 ~ 265 VAC

Frequency - Switching:: -

Contents:: 70kHz

Utilized IC / Part:: Board(s)

Power - Output:: L4984D

EVL4984-350W FAQ

1.How can I place an order for EVL4984-350W through Aetrix?

Please submit a Request for Quotation (RFQ) for EVL4984-350W on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for EVL4984-350W reliable?

The price and inventory of EVL4984-350W are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EVL4984-350W is usually 5 days.

3.What payment methods are accepted for EVL4984-350W?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EVL4984-350W transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for EVL4984-350W?

EVL4984-350W orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your EVL4984-350W order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for EVL4984-350W?

For technical support, including EVL4984-350W datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EVL4984-350W requirements.

6.How does Aetrix verify that EVL4984-350W is sourced from the original manufacturer or authorized distributors?

All EVL4984-350W products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that EVL4984-350W meets industry standards.

7.What is the process for return or replacement of EVL4984-350W?

All EVL4984-350W units undergo pre-shipment inspection (PSI). If there is an issue with EVL4984-350W, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The EVL4984-350W part is unused and in its original packaging.

Return procedure for EVL4984-350W:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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