containsmachine

SRK1000 flyback adaptive synchronous rectification controller

EVLSRK1000-DP

Overview

The EVLSRK1000-DP is a demonstration board, designed for evaluation of the SRK1000 synchronous rectification controller.

The SRK1000 implements a control scheme specific for secondary-side synchronous rectification in flyback converters and provides high-current gate-drive outputs for driving N-channel power MOSFET.
The device can operate both in quasi-resonant applications and in fixed frequency (FF) mixed DCM-CCM applications. The board is provided with a setting suitable for QR applications. To use in FF applications, a 100 pF capacitor needs to be added in C4. A 68 kΩ resistor (R5) is provided on the TON pin that fixes the blanking after the turn-on to about 0.8 μs.
The board includes the SR MOSFET (DPAK package) and can be easily implemented into an existing converter to substitute rectifier diodes.

Main features

Synchronous rectifier for flyback converter, with fixed turn-on and adaptive turn-off
V_CC range: 3.5 V to 32 V
DVS max. operating voltage 90 V
Max. frequency: 500 kHz
Internal gate-drive for N-channel MOSFET
SR MOSFET type: STD80N10F7 (100 V - 10 mΩ) DPAK

Design Files

Related Devices

Devices	Class	introduce	Datasheet
SRK1000		AC to DC Switching Converter Flyback 300kHz T/R 6-Pin SOT-23	Download

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Update:2024-11-15 07:37:44

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