EVLSRK1001-TO

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SRK1001 adaptive synchronous rectification controller for flyback converter demonstration board with SR MOSFET

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Product overview

Description

The EVLSRK1001-TO is a demonstration board, designed for evaluation of the SRK1001 synchronous rectification controller.

The SRK1001 implements a control scheme specific for secondary-side synchronous rectification in flyback converters and provides high-current gate-drive outputs for driving N-channel Power MOSFET. The device can operate both in quasi-resonant (QR) applications and in fixed frequency (FF) mixed DCM-CCM applications. The board is provided with a setting suitable for QR application. To use in FF applications, a 100 pF capacitor needs to be added in C3. A 120 kΩ resistor (R3) is provided on the TON pin that fixes the blanking after the turn-on to about 1.44 μs. The blanking time after turn-off is set to 3 μs through a 100 kΩ resistor (R4) on TOFF pin.

In order to use the DIS/SYNC pin functionality, the user has to remove the zero ohm resistor R9: the PCB already provides a npn transistor connected to this pin for remote ON/OFF.

The board includes the SR MOSFET (TO220FP package) and can be easily implemented into an existing converter to substitute rectifier diodes.

  • All features

    • Synchronous rectifier for flyback converter, with fixed turn-on and adaptive turn-off
    • Vcc range: 3.5 V to 32 V
    • DVS sensing voltage: 185V AMR
    • Max frequency: 500 kHz
    • Internal gate drive for N-channel MOSFET
    • SR MOSFET type: FDPF190N15A (150 V – 19 mΩ) TO220FP

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade WEEE Compliant Material Declaration**
EVLSRK1001-TO
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CARD Industrial Ecopack1 -

EVLSRK1001-TO

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CARD

Material Declaration**:

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Active

Package

CARD

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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.

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Part Number:

EVLSRK1001-TO

Core Product:

SRK1001

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ST

ECCN (EU):

NEC

Country of Origin:

ITALY

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-

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(*) 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