EVLSRK1000-DP STMicroelectronics

EVLSRK1000-DP SRK1000 adaptive synchronous rectification controller for flyback converter demonstration board with STD80N10F7 Data brief Description 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 Features added in C4. A 68 k resistor (R5) is provided on Synchronous rectifier for flyback converter, the TON pin that fixes the blanking after the turn- with fixed turn-on and adaptive turn-off on to about 0.8 s. V range: 3.5 V to 32 V CC The board includes the SR MOSFET (DPAK package) and can be easily implemented into an DVS max. operating voltage 90 V existing converter to substitute rectifier diodes. Max. frequency: 500 kHz Internal gate-drive for N-channel MOSFET SR MOSFET type: STD80N10F7 (100 V - 10 m) DPAK 19 October 2018 DB3430 Rev 1 1/4 For further information contact your local STMicroelectronics sales office. www.st.com% &7-43, %1 +). 50 7 45 / 8 / , 43 8 Electrical schematic EVLSRK1000-DP Electrical schematic Figure 1. EVLSRK1000-DP electrical schematic 4 4 / 96 % 7 4 5 % &3)% 2/4 DB3430 Rev 1 + % 3 / . 3 % 6 %7 2 3 (/ 3 3 / . (% / . 3 / .