up to 277vac/347vac/ 1000vac true one - wire adjustable offline voltage sources p reliminary d ata sheet d general description ? adjustable o ffline voltage source ? 2.7v to 100v adjustable output voltage ? 100s of ma drive capability ? lowest cost solution ? lnd081a/b include full bridge diodes ? universal input : ? 28vac, 48vac or 120vac (a) ? up to 277vac (a), 347vac(b ) ? up to 1000vac (c ) ? one wire hv conductor eliminate s need for multiple input wires ? resistor programmable output voltage against a diode t h reshold ? replaces standard transformer or ac divider solutions ? lower leakage than mosfet, igbt, bipolar, xfmr or cap solutions ? 8 pin epad - soic package features the lnd 081 a/b /c are single wire high voltage conductor , low cost solution s for deriving from ac offline voltages a dc output between 2.7v and 100v with mas to 100s of mas of current . the lnd0 81a are for 28vac, 48vac, 120vac or 277vac sources and include the input full bridge diodes. the LND081B is for 347va c applications and the lnd081c is for up to 1000vac but require external full bridge diodes. the lnd081a are packaged in 8 pin epad soic packages. LND081B/c are available as bare die. applications ? offline uc or plc voltage supplies ? industrial ac communications loop derived supplies ? electric grid remote supplies for monitoring equipment ? emergency lighting, monitoring equipment, ind ustrial plant supplies ? white good s typical application circuit lnd 081a/b/c equivalent circuit typical waveforms no output capacitor 120vac input C C 100uf output capacitor 85vac input C C ? linear dimensions semiconductor inc. ? 22620 ricardo rd, cupertino ca 95014 usa ? tel 312.321.1810 ? fax 312.321.1830 ? www.lineardimensions.com ? vref gnd a c vout 0 . 1 uf , 100 v or fuse l o a d ac + ac - 2 . 7 to 100 v 85 - 277 vac
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