STEVAL-SCR001V1 STMicroelectronics

STEVAL-SCR001V1 Inrush current solution with bypass SCR Data brief Description The STEVAL-SCR001V1 is a low cost evaluation board for testing ST inrush current limitation solutions. Based on an analog control circuit with only discrete components, it offers a compact and reliable alternative to relays to bypass inrush current limiting resistors in power converters. Its drive circuit is self-synchronized to the AC line. Working in pulsed mode, it allows low gate drive consumption and no SCR reverse losses. Additionally, the 50 mA SCR TN5015H-6G provides better immunity to Electrical Fast Transients (EFT). Features The power supply of the circuit can be created Two high-temperature thyristors (SCR) in from a secondary winding of a PFC or an DPAK package to bypass the inrush auxiliary power supply used to drive transistor resistor and power the system MCU. With no adjustment Compact SMD solution: 26 x 26 mm ( 1 sq. needed when 12 V unregulated power is in) supplied, and only 5 wires to connect, this board Simple drive circuit: 2 low voltage transistors can be easily implemented on existing PFC or fly- and 7 resistors (no MCU) back converters. Requires an unregulated power supply (12 V It is suitable for applications with peak current up typ. created from a secondary winding) to 5 A (at 60 C ambient temperature). Compatible with PFC and fly-back converter Suitable for applications from 50 W up to 800 W (230 V , T = 60 C) RMS AMB Input voltage range: 90-265 VAC, 50/60 Hz Robust and immune (2 kV IEC 61000-4-5, 2.5 kV IEC 61000-4-4) and low EMI noise (EN55014) solution RoHS compliant December 2017 DocID031227 Rev 2 1/4 www.st.com For further information contact your local STMicroelectronics sales office Schematic diagrams STEVAL-SCR001V1 1 Schematic diagrams Figure 1: STEVAL-SCR001V1 circuit schematic R1 402 C1 R4 SCR1 connector R8 10k 5 NPN VAC L TN5015H-6G 4 T2 R INR 3 OUT 2 AUX R9 1 VAC N R2 3.3k TN5015H-6G 4.02K J1 R6 PNP SCR2 T1 R10 3.3k C2 R5 R11 3.3k 402 2/4 DocID031227 Rev 2