An hi voltage auxiliary supply in range of ten watts is useful to power control electronics on a hi voltage PV string.
now are available sic mosfets at 1700v and 3300v and sic jfet-s at 1700v.
yuo can hack an existing SMPS by cascoding it-s mosfet with a hi voltage silicon carbide sic j-fet and change de diode in clamp circuit with a 1700v silicon carbide SBD, at 1a.
My tested circuit is tny266 cascoded with UF3N170400B7S
Other is an diy design self oscillating with 1700v or 3300 sic mosfet as G2R1000MT33J
Oscillogram of cascode powered at 370vdc with 500mw load
Schematic diagram of diy self oscillating SMPS
Oscillogram on output winding of diy smps with 10w load powered at 140v battery bank, it`s start running at 50vdc and oprate to 600vdc
now are available sic mosfets at 1700v and 3300v and sic jfet-s at 1700v.
yuo can hack an existing SMPS by cascoding it-s mosfet with a hi voltage silicon carbide sic j-fet and change de diode in clamp circuit with a 1700v silicon carbide SBD, at 1a.
My tested circuit is tny266 cascoded with UF3N170400B7S
Other is an diy design self oscillating with 1700v or 3300 sic mosfet as G2R1000MT33J
Oscillogram of cascode powered at 370vdc with 500mw load
Schematic diagram of diy self oscillating SMPS
Oscillogram on output winding of diy smps with 10w load powered at 140v battery bank, it`s start running at 50vdc and oprate to 600vdc
