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1 STEVAL-ISW00V. kw manual arc welder demonstration board Data brief Features V in : Vac to Vac V out : 0 V (peak) I out_max : A Frequency switching: 0 khz Efficiency > % RoHS compliant Description The STEVAL-ISW00V demonstration board is a complete. kw arc welding system capable of A of welding current. It is designed for small industrial applications and domestic use for do-ityourself applications. The system is ready-to-use and designed to perform manual metal arc (MMA) welding of iron and steel, following MMA process recommendations. The purpose of the demonstration board is to provide a platform for evaluation of STMicroelectronics silicon devices in high power/current applications, where the robustness and efficiency of the silicon devices used are the keys to a reliable system. The complete system consists of two boards. One is a power board, where all the power conversion devices needed for the application are mounted. The other is a small control board that includes the PWM generator and analog control circuitry necessary to manage the MMA arc welding process. The layout of the power board is designed to achieve a low level of interference, taking into consideration the high power delivered and the current levels present on many parts of the board. The shape of the board and the position of the magnetic/silicon components mounted on it are optimized to guarantee sufficient air flow to the parts involved in heat dissipation. STEVAL-ISW00V The design is quick to set up and install, and is reusable (the Gerber files are available for download from the ST website). March 00 Doc ID 0 Rev / For further information contact your local STMicroelectronics sales office.

2 Schematic diagrams STEVAL-ISW00V Schematic diagrams Figure. Power board schematic / Doc ID 0 Rev

3 STEVAL-ISW00V Schematic diagrams Figure. Control board schematic TS +V J R out_comp inv _comp noninv _comp Vcc cc+ noninv _op inv _op out_op TSM0 R k D DN C 0nF out_comp inv _comp noninv _comp Vcc- noninv _op inv _op out_op Cathode R 0 R k Welding Current Set C nf D DN max duty R D DN R 00k R R k R.k k J SG SC current set up + Vcc sy nc outb osc sc_out Vc CT GND RT outa 0 DIS Sof t_start comp Q BC R D DN SD R k TS +V R 0 PWM_O _OUT C 00p BF BF BF BF BF BF BF BF BF BF BF0 BF BF - R C.nF Temperature protection R k C 00nF R0 R R k C.nF nf R k R0 R Meg R k R0 k R 00k C 0uF V D DN R R Meg +V R k C n R 00k R k SET = 0. C 0pF R C R k D DN nf Q BC +V Khz PWM frequency +V C 00nF R 0k PWM_O _OUT +V C0 0pF C 00nF BUS Monitor or TA_ A_Current SD SC_Detection OUT_Winding_ inding_sen ense +V +V +V R k R K R R.k D zener.v R 00k SC_de _detection R k R 0 0 J CON TA_ A_Current OUT_Winding_ inding_sen ense AM00v Doc ID 0 Rev /

4 Revision history STEVAL-ISW00V Revision history Table. Document revision history Date Revision Changes -Mar-00 Initial release. / Doc ID 0 Rev

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