The SRK1000 is a controller intended for second-ary 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, capa-ble 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 in-novative adaptive turn-off logic allow maximizing the conduction time of the SR MOSFET and elim-inating 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 TON. In this way, converter's efficiency improves at light load where synchronous rectification is no more bene-ficial..
After the converter restarts switching or the IC de-tects that the current conduction in the rectifiers has increased 20% above the min TON pro-grammed value, the IC exits low consumption mode and resumes switching operation.
|DS12787: Adaptive synchronous rectification controller for flyback converter||2.0||1 MB|
|AN5066: SRK1000/A/B adaptive synchronous rectification controller for flyback converters evaluation board family||1.0||1 MB|
|Secondary regulation Synchronous rectification controllers||2 MB|
|Brochure Power management guide||10.2018||4 MB|
|Part Number||Package||Packing Type||Marketing Status||Unit Price (US$) *||Quantity||ECCN (US)||Country of Origin||More info||Order from ST||Order from Distributors|
|SRK1000ATR||SOT23-6L||Tape And Reel||Active : Product is in volume production||0.26||1000||EAR99||-||MORE INFO||No availability reported, please contact our Sales office|
|Part Number||Marketing Status||Package||Grade||RoHS Compliance Grade||Material Declaration**|
(**) 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.