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  • The EVLCMB1-90WADP demonstration board is a 19 V - 90 W converter, tailored for the typical specification of an ac-dc adapter for laptops and notebooks, with a wide input mains range and very low power consumption under light-load.

    The architecture is based on a two-stage approach: a front-end transition mode PFC pre-regulator and a downstream LLC resonant half-bridge converter; the PFC and LLC are both integrated in the STCMB1 combo IC.
    The PFC section uses a proprietary constant on-time control methodology that does not require a sinusoidal input reference, thereby reducing the system cost and external component count. The LLC section is based on a proprietary time shift control method with simple compensation; this improves the dynamic behavior and input ripple rejection resulting in a cleaner output voltage bringing advantages to the circuitry placed to the SMPS secondary side.
    The STCMB1 device also embeds a high voltage start up generator, an x-capacitor discharge circuit and a complete set of protections. These features are fully exploited in the EVLCMB1-90WADP device to make a robust and safe SMPS, while keeping a reduced external component count.
    The EVLCMB1-90WADP device is characterized by very high efficiency at the light loads that comes from the combination of the design and selection of the power components and the innovative burst mode management functions integrated in the STCMB1, including a proprietary IP that allows minimizing the number of cycles in the burst packet and so minimizing the switching losses.

    Key Features

    • Universal input mains voltage range: from 90 V ac to 264 V ac- frequency from 45 to 65 Hz
    • Output voltage: 19 V, 4.75 A continuous operation
    • Average efficiency: > 90%, according to European CoC ver. 5 Tier 2 for external power supplies
    • Efficiency > 60% with Pout = 250 mW, according to EuP lot 6 Tier 2 for household and office equipment
    • No load mains consumption: < 90 mW at 230 V ac, according to European CoC ver. 5 Tier 2 for external power supplies
    • Mains harmonics: meets EN61000-3-2 Class-D and JEITA-MITI Class-D
    • EMI: according to EN55022 Class-B
    • Safety: meets EN60950 standards
    • RoHS compliant

Sample & Buy

Part Number
Core Product
Marketing Status
Budgetary Price (US$)*
Quantity
ECCN (US)
Country of Origin
Board production status
Order from Distributors
Order from ST
EVLCMB1-90WADP STCMB1
Active
- - EAR99 - - No availability of distributors reported, please contact our sales office

EVLCMB1-90WADP

Core Product

STCMB1

Marketing Status

Active

Unit Price (US$)

*

Unit Price (US$)

-

Quantity

-

ECCN (US)

EAR99

Country of Origin

-

Board production status

-

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

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00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DB2886
      19 V - 90 W adapter based on the STCMB1, TM PFC and HB LLC combo controller
      2.0
      571.47 KB
      PDF
      DB2886

      19 V - 90 W adapter based on the STCMB1, TM PFC and HB LLC combo controller

    • Description Version Size Action
      AN5035
      19 V - 90 W adapter based on the STCMB1, combo TM PFC and HB LLC
      2.0
      1.41 MB
      PDF
      AN5035

      19 V - 90 W adapter based on the STCMB1, combo TM PFC and HB LLC

Hardware Resources

    • Description Version Size Action
      EVLCMB1-90WADP gerber files 1.0
      147.67 KB
      ZIP

      EVLCMB1-90WADP gerber files

    • Description Version Size Action
      EVLCMB1-90WADP BOM 2.0
      62.14 KB
      PDF

      EVLCMB1-90WADP BOM

    • Description Version Size Action
      EVLCMB1-90WADP Schematic 1.0
      83.12 KB
      PDF

      EVLCMB1-90WADP Schematic

Publications and Collaterals

    • Description Version Size Action
      eDesignSuite-The smart way to design your application 1.0
      842.88 KB
      PDF

      eDesignSuite-The smart way to design your application

Legal

    • Description Version Size Action
      Evaluation products license agreement 1.6
      74.12 KB
      PDF

      Evaluation products license agreement

Part Number Marketing Status Package Grade RoHS Compliance Grade WEEE Compliant Material Declaration**
EVLCMB1-90WADP
Active
CARD Industrial Ecopack1 -

EVLCMB1-90WADP

Package:

CARD

Material Declaration**:

Marketing Status

Active

Package

CARD

Grade

Industrial

RoHS Compliance Grade

Ecopack1

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.