7 W dual output flyback converter with standby managed by capacitive touch using VIPer0P and STM32L

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  • This offline converter key feature is the zero power mode (ZPM), an idle state during which the device is totally shut down. The IC enters ZPM by pulling the OFF pin to SGND for more than 10 ms and exits ZPM (resuming normal switching) by pulling the ON pin to SGND for more than 20 μs. This function can be tested via the tactile switches connected to the ON and OFF pins.

    In ZPM the mains power consumption at 230 VAC can be below 5 mW; the STEVAL-ISA192V1 evaluation board consumption is 30 mW due to the MCU polling strategy implemented at firmware level.
    The board has a dual output (i.e., - 5 V and + 7 V based on flyback topology). The negative output is obtained by just connecting EAGND to the negative rail and a voltage divider among FB, EAGND and SGND. The positive output derives from the turn ratio of the transformer secondary windings.
    To achieve extremely low input power consumption, the IC is biased through a diode coming from the + 7 V, which maintains the VCC voltage high enough (> 4.5 V) to prevent the internal HV current source activation.
    The STEVAL-ISA192V1 is equipped with the STM32L0 microcontroller which detects tactile push buttons and capacitive touch interface. The STM32L0 core manages VIPer0P to achieve minimum power consumption in ZPM, while supplying the microcontroller and user interface (capacitive touch and push button) and still maintaining the overall efficiency quite high in standard operation mode.

    Key Features

    • Smart standby architecture using the zero power mode (ZPM) for capacitive touch sensing in consumer electronics applications
    • Enhanced system reliability thanks to VIPer0P 800 V avalanche rugged technology and its embedded protection
    • Minimized system input power consumption: less than 30 mW at 230 VAC in ZPM
    • IEC55022 Class B conducted EMI compliant, even with reduced EMI filter, thanks to the frequency jittering feature
    • IEC61000-4-2 (ESD), IEC61000-4-4 (EFT) and IEC61000-4-5 (Surge) compliant
    • RoHS compliant

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STEVAL-ISA192V1 VIPer0P; STM32L
Active
65.0 1 EAR99 ITALY - Check Availability

Distributor availability ofSTEVAL-ISA192V1

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 10 1 Order Now
MOUSER WORLDWIDE 7 1 Order Now
Farnell Element14 EUROPE 30 1 Order Now

Distributor reported inventory date: 2019-12-05

Distributor Name

DIGIKEY

Stock

10

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

7

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

30

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-05

Buy now

STEVAL-ISA192V1

Core Product

VIPer0P; STM32L

Marketing Status

Active

Unit Price (US$)

65.0*

Distributor availability ofSTEVAL-ISA192V1

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 10 1 Order Now
MOUSER WORLDWIDE 7 1 Order Now
Farnell Element14 EUROPE 30 1 Order Now

Distributor reported inventory date: 2019-12-05

Distributor Name

DIGIKEY

Stock

10

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

7

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

30

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-05

Unit Price (US$)

65

Quantity

1

ECCN (US)

EAR99

Country of Origin

ITALY

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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Technical Documentation

    • Description Version Size Action
      DB3187
      7 W dual output flyback converter with standby managed by capacitive touch using VIPer0P and STM32L
      1.0
      250.95 KB
      PDF
      DB3187

      7 W dual output flyback converter with standby managed by capacitive touch using VIPer0P and STM32L

    • Description Version Size Action
      AN4941
      7 W dual output (-5 V/+7 V) non-isolated flyback converter with capacitive touch sensing using VIPer0P and STM32L052
      1.0
      3.43 MB
      PDF
      AN4941

      7 W dual output (-5 V/+7 V) non-isolated flyback converter with capacitive touch sensing using VIPer0P and STM32L052

Hardware Resources

    • Description Version Size Action
      STEVAL-ISA192V1 gerber files 1.0
      165.28 KB
      ZIP

      STEVAL-ISA192V1 gerber files

    • Description Version Size Action
      STEVAL-ISA192V1 BOM 1.0
      62.23 KB
      PDF

      STEVAL-ISA192V1 BOM

    • Description Version Size Action
      STEVAL-ISA192V1 schematics 1.0
      285.12 KB
      PDF

      STEVAL-ISA192V1 schematics

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**
STEVAL-ISA192V1
Active
CARD Industrial Ecopack2 Yes

STEVAL-ISA192V1

Package:

CARD

Material Declaration**:

Marketing Status

Active

Package

CARD

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) 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.

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