STEVAL-L6986IV1

Active

38 V, 5 W synchronous iso-buck converter evaluation board with dual isolated output based on the L6986I

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Product overview

Description

The STEVAL-L6986IV1 evaluation board is based on L6986I 38 V, 5 W synchronous step-down switching regulator designed for isolated buck topology. The primary output voltage can be accurately adjusted, whereas the isolated secondary output is generated by using a transformer. No optocoupler is required.
The primary sink capability (typ. 1.9 A) allows proper energy transfer to the secondary side as well as a tracked soft-start of the secondary output. The control loop is based on a peak current mode architecture and the device operates in forced PWM.
The 300 ns blanking time filters oscillations generated by the transformer leakage inductance, making the solution more robust. Pulse by pulse current sensing on both power elements implements an effective constant current protection on the primary side. Thanks to the primary reverse current limit, the secondary output is protected against short-circuit.
The secondary voltage is stabilized over current by using a power transistor and a shunt voltage reference (TL431AIL3T).
The STEVAL-L6986IV1 evaluation board generates two isolated voltages (positive around 18 V and negative between 4 and 5 V), particularly suitable for supplying the IGBT/SiC MOSFET gate driver for multiple applications. A simple by-pass enables the supply of a single isolated voltage.
  • All features

    • Designed for iso-buck topology
    • 4 to 38 V operating input voltage
    • Primary output voltage regulation/no optocoupler required
    • 1.9 A typical sink peak primary current capability
    • Peak current mode architecture in forced PWM operation
    • 300 ns blanking time
    • 8 µA IQ-SHTDWN
    • Adjustable fSW and synchronization
    • Embedded primary output voltage supervisor
    • Adjustable soft-start time
    • Internal primary current limiting
    • Overvoltage protection
    • RDS(on) HS = 180 mΩ, RDS(on) LS = 150 mΩ
    • Thermal shutdown

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade WEEE Compliant Material Declaration**
STEVAL-L6986IV1
Active
CARD Industrial Ecopack2 Yes

STEVAL-L6986IV1

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.

Sample & Buy

Part Number
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Core Product
Marketing Status
Supplier
ECCN (US)
ECCN (EU)
Country of Origin
Board production status
Budgetary Price (US$)*/Qty
STEVAL-L6986IV1 Available at 1 distributors

Distributor availability ofSTEVAL-L6986IV1

Distributor Name
Region Stock Min. Order Third party link
Farnell Element14 EUROPE 10 1 Buy from Distributor

Distributor reported inventory date: 2021-11-27

Distributor Name

Farnell Element14

Stock

10

Min.Order

1

Distributor reported inventory date: 2021-11-27

L6986I
Active
ST EAR99 NEC ITALY - 33.0 / 1

STEVAL-L6986IV1

Core Product

L6986I

Marketing Status

Active

Budgetary Price (US$)*/Qty

33.0 / 1

Distributor availability ofSTEVAL-L6986IV1

Distributor Name
Region Stock Min. Order Third party link
Farnell Element14 EUROPE 10 1 Buy from Distributor

Distributor reported inventory date: 2021-11-27

Distributor Name

Farnell Element14

Stock

10

Min.Order

1

Distributor reported inventory date: 2021-11-27

Supplier

ST

ECCN (US)

EAR99

ECCN (EU)

NEC

Budgetary Price (US$)* / Qty

33.0 / 1

Country of Origin

ITALY

Board production status

-

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