SRK1004

Active

Synchronous rectifier controller for non-complementary active clamp flyback converter

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Product overview

Description

SRK1004 controller is intended for secondary side synchronous rectification (SR) in Non-Complementary Actively Clamped Flyback, Resonant Flyback, and Quasi-Resonant Flyback converters.

It provides a gate-drive output suitable for N-channel logic-level or standard level power MOSFETs.

The control scheme of this device is such that the SR MOSFET is switched on as soon as current starts flowing through its body diode and it is then switched off as current approaches zero.

The device can be supplied directly from the converter’s output voltage when operated in low-side configuration. When used in high-side configuration, it is recommended to power the IC from a dedicated auxiliary winding.

When operated in high-side configuration, a special function enables a quick detection of short-circuit conditions to inhibit its operation as if the IC were powered directly from the output voltage.

  • All features

    • Secondary-side synchronous rectification controller optimized for Non-Complementary Actively Clamped Flyback converter (NC-ACF).
    • Able to operate in both low-side and high-side configuration
    • Supporting logic level (A and B) and standard level (C and D) MOSFETs
    • Two different turn-off delays available to cover a wide range of MOSFETs
    • Wide range supply voltage: 4 to 36 V
    • Very low operating current (580 µA) and quiescent current (230 µA)
    • High-voltage sensing input for SR MOSFET drain-source voltage (190 V AMR)
    • Operating frequency up to 500 kHz
    • Fast short-circuit detector
    • Tiny DFN 6L 2x2 mm package

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The current status of a product:
Active: Product is in volume production
Evaluation: Product is under characterization. Limited Engineering samples available
Preview: Product is in design stage
Target: Product is in design feasibility stage.No commitment taken to produce
Proposal: Marketing proposal for customer feedback.No commitment taken to design or produce
NRND: Not Recommended for New Design.Product is in volume production only to support customers ongoing production.
Marketing description of the package type.Compliancy of the device with industry requirement domains (IRD)The RoHS status of a product:
ECOPACK 1: Initial grade to identify European RoHS compliant products.
ECOPACK 2: New grade to identify brominated chlorinated and antimony oxide flame retardant free products.
ECOPACK 3: Halogen free RoHS exemptions free products.
(*): ECOPACK 2 version available upon request.
(**): Some versions still existing in ECOPACK 1 or not compliant.
The current status of a product:
Active: Product is in volume production
Evaluation: Product is under characterization. Limited Engineering samples available
Preview: Product is in design stage
Target: Product is in design feasibility stage.No commitment taken to produce
Proposal: Marketing proposal for customer feedback.No commitment taken to design or produce
NRND: Not Recommended for New Design.Product is in volume production only to support customers ongoing production.
Budgetary PriceMarketing description of the package type.Storage method used to contain product.Main country of assembly or fabrication of the product.ECCNs are five character alpha-numeric designations used on the Commerce Control List to identify dual-use items for export control purposes. ECCNs are five character alpha-numeric designations used on the Commerce Control List to identify dual-use items for export control purposes.The value as specified by level (minTypMax) of the ambient temperature (in Cel) in which this item was designed to operate.The value as specified by level (minTypMax) of the ambient temperature (in Cel) in which this item was designed to operate.