SRK1001TR AC-DC Converters by STMicroelectronics

Adaptive synchronous rectification controller for flyback converter

Status: Active
Series: SRK1001
RoHS: Compliant
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The SRK1001 controller is designed for secondary side synchronous rectification (SR) in flyback converters, suitable for operation in QR and mixed CCM/DCM fixed frequency circuits. It provides 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 then switched off as current approaches zero. The fast turn-on with minimum delay and 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 DIS pin is pulled up by the user, or when the SR MOSFET conduction falls below the programmed minimum T ON . This improves the converter efficiency at light load, where synchronous rectification is no longer beneficial. After the converter restarts switching or the DIS pin goes low again and 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.

Where to Buy

Prices starting from US$0.85

Distributor Stock
Logo for element14 Singapore
element14
from US$1.06
1,344
in stock
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Logo for Farnell UK
Farnell
from US$0.97
1,344
in stock
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Logo for RS UK
RS
from US$1.19
75
in stock
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Logo for Avnet America
Avnet America
from US$0.85
0
in stock
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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 3.7 to 32 V
CC regulation operation down to 2V output supported
Very low quiescent current in low consumption mode (170 µA)
High-voltage sensing input for SR MOSFET drain-source voltage (185 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 minimum TON and TOFF
Low consumption mode entry by DIS pin, by primary side burst-mode detection or by detection of SR MOSFET conduction lower than programmed min. TON
SO8 package

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Alternative Descriptions

ADAPTIVE SYNC RECTIFICATION CTRL, SOIC-8 | element14
STMicroelectronics SRK1001TR | RS
AC/DC Converter, Flyback, 3.7 V to 32 V, Non Isolated, 8 Pins, SOIC | Avnet America


Frequently Asked Questions

Where can I find additional details, specifications and documents for a SRK1001TR?

Additional datasheets, footprints and schematics for SRK1001TR are listed on our Part Details page. You can also find images and similar parts to SRK1001TR on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for SRK1001TR on our Product Comparison page. Access via the 'View Pricing & Stock' button to view SRK1001TR price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does SRK1001TR fall under?

The SRK1001TR is listed under Power Management > AC-DC Converters > Synchronous Rectification Controllers.

Can I view similar or alternative parts?

You can view similar parts to SRK1001TR when available in the Synchronous Rectification Controllers range under the specifications section at the bottom of the details page.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the SRK1001TR you can contact the distributor directly for product support, shipping queries etc.

Is the SRK1001TR RoHS compliant?

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

Which authorised distributors for SRK1001TR have stock available?

Authorised distributors including element14, Farnell, RS and Avnet America have stock available or on a lead time for SRK1001TR.

How do I check stock and lead times for all distributors?

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