SRK1000ATR AC-DC Converters by STMicroelectronics

Adaptive synchronous rectification controller for flyback converter

Semiconductors - ICs
> Power Management ICs - PMIC
> DC / DC Power Management
> DC / DC Controllers
Status: Active
Series: SRK1000A
RoHS: Compliant
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SRK1000 / SRK1000A /SRK1000B are controllers intended for secondary side synchronous rectification (SR) in flyback converters, suitable for operation in QR and mixed CCM/DCM fixed frequency circuits. They provide a high-current gate-drive output, capable of driving N-channel Power MOSFETs. The control scheme of this IC 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 fast turn-on, with minimum delay, and the innovative adaptive turn-off logic allow maximizing the conduction time of the SR MOSFET and eliminating the effect of parasitic inductance in the circuit. The device enters low consumption mode when it detects primary controller burst-mode operation, or when the SR MOSFET conduction becomes lower than the programmed minimum T ON . In this way, converter efficiency improves at light load where synchronous rectification is no longer beneficial. After the converter restarts switching or the IC detects that the current conduction in the rectifiers has increased 20% above the min T ON programmed value, the IC exits low consumption mode and resumes switching operation.

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Prices starting from US$0.70

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Features

Secondary side synchronous rectification controller optimized for flyback converter.
Suitable for QR and mixed CCM/DCM fixed frequency operation.
Wide Vcc operating voltage range 3.75 to 32 V.
CC regulation operation down to 2 V output supported.
Very low quiescent current in low consumption mode (160 μA).
High-voltage sensing input for SR MOSFET drain-source voltage (100 V AMR).
Operating frequency up to 300 kHz.
High-current gate-drive output for N-MOSFET.
Fast turn-on with minimum delay time and adaptive turn-off logic.
Programmable min. TON and fixed min. TOFF (3 options: SRK1000, SRK1000A, SRK1000B).
Low consumption mode entry by primary side burst-mode detection or by detection of SR MOSFET conduction lower than programmed min TON.
SOT23-6L package.

Last 6 months Inventory & Pricing History

Alternative Descriptions

Dc-Dc Controller, 300Khz, -40 To 150Degc Rohs Compliant: Yes |Stmicroelectronics SRK1000ATR | Newark Electronics
SRK1000A Series 32 V Adaptive Synchronous Rectification Controller - SOT23-6L | Future Electronics
Adaptive Synchronous Rectification Controller for Flyback Converter 6-Pin SOT-23 T/R | Avnet America
DC-DC CONTROLLER, 300KHZ, -40 TO 150DEGC | element14

Frequently Asked Questions

Where can I find additional details, specifications and documents for a SRK1000ATR?

Additional datasheets, footprints and schematics for SRK1000ATR are listed on our Part Details page. You can also find images and similar parts to SRK1000ATR on this page.

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Distributor pricing and stock information is available for SRK1000ATR on our Product Comparison page. Access via the 'View Pricing & Stock' button to view SRK1000ATR price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does SRK1000ATR fall under?

The SRK1000ATR is listed under Power Management > AC-DC Converters > Synchronous Rectification Controllers.

Can I view similar or alternative parts?

You can view similar parts to SRK1000ATR when available in the Synchronous Rectification Controllers range under the specifications section at the bottom of the details page.

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Submit any questions directly to the customer support team of the distributor listing the product. For the SRK1000ATR you can contact the distributor directly for product support, shipping queries etc.

Is the SRK1000ATR RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by STMicroelectronics.

Which authorised distributors for SRK1000ATR have stock available?

Authorised distributors including Newark Electronics, Future Electronics, Avnet America, element14 and Farnell have stock available or on a lead time for SRK1000ATR.

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