STMicroelectronics SRK1000B
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.| Part No. | SRK1000B |
|---|---|
| Datasheet | SRK1000B Download |
| Manufacturer |  STMicroelectronics |
| Description | Adaptive synchronous rectification controller |
| Buy | Stock & Price |
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. Application
● Battery chargers / quick chargers
● Adapters
● USB power delivery (profile 3)
DESCRIPTION
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.
