Con­for­mal coat­ing en­hances sys­tem re­li­a­bil­ity

DEMM Engineering & Manufacturing - - CORROSION CONTROL & I NDUSTRIAL COATINGS -

POWER INTEGRATIONS now ap­plies fac­tory con­for­mal coat­ing for its SCALE IGBT and MOSFET driv­ers. Con­for­mal coat­ing en­hances sys­tem re­li­a­bil­ity by pro­tect­ing elec­tronic com­po­nents against con­tam­i­nants such as pol­lu­tion, dust and con­den­sa­tion, which may cause cor­ro­sion. Power Integrations’ fac­tory- coated gate driv­ers re­duce in­ven­tory cost, lead time and over­all cost of own­er­ship by elim­i­nat­ing the need for man­u­fac­tur­ers to send boards to sub­con­trac­tors for clean­ing and coat­ing.

Power Integrations uses an ad­vanced acrylic lac­quer, broadly used in the in­dus­trial and au­to­mo­tive sec­tors. The highly au­to­mated process is qual­i­fied in ac­cor­dance with IEC 60068-2 tests, and is fol­lowed by 100 per­cent op­ti­cal in­spec­tion to en­sure con­sis­tent qual­ity. Con­for­mally coated SCALE gate- driver cores are UL recog­nised com­po­nents.

Ini­tially, the 2SC0106T, 2SC0108T, 2SC0435T, 2SP0115T and 1SP0335 gate- driver fam­i­lies will be of­fered with con­for­mal coat­ing, fol­lowed by the 2SD300C17, 2SC0535T, 2SC0635T, 2SP0320 and 1SP0635V se­ries in the near future. All future prod­ucts will also in­clude fac­tory coat­ing as an op­tion.

Michael Hornkamp, se­nior di­rec­tor of mar­ket­ing for gate- driver prod­ucts at Power Integrations, said cus­tomers in wind in­vert­ers, trac­tion in­vert­ers, HVDC MMC sta­tions, pho­to­voltaics and in­dus­trial drives where harsh en­vi­ron­ments are rou­tinely en­coun­tered ben­e­fit from a fac­tory con­for­mal- coat­ing process.

“By test­ing, clean­ing and coat­ing the boards in our fa­cil­ity, we re­duce the op­por­tu­nity for the units to be con­tam­i­nated prior to coat­ing, and we elim­i­nate the time, cost and in­con­ve­nience of us­ing third- party sub­con­trac­tors.”

WHAT IS CON­FOR­MAL COAT­ING?

Con­for­mal coat­ing is a process of ap­ply­ing a thin poly­meric film which “con­forms” to the con­tours of a printed cir­cuit board in or­der to pro­tect the board’s com­po­nents. It is ap­plied to elec­tronic cir­cuitry to act as pro­tec­tion against mois­ture, dust, chem­i­cals, and tem­per­a­ture ex­tremes that, if un­coated (non- pro­tected), could re­sult in dam­age or fail­ure of the elec­tron­ics to func­tion. When elec­tron­ics must with­stand harsh en­vi­ron­ments and added pro­tec­tion is nec­es­sary, Power Integrations can coat the board as­sem­blies as part of the pro­duc­tion process.

WHAT ARE THE BEN­E­FITS OF CON­FOR­MAL COAT­ING FROM POWER INTEGRATIONS?

• Fac­tory- coated gate driv­ers re­duce in­ven­tory cost, lead time and over­all cost of own­er­ship by elim­i­nat­ing the need for man­u­fac­tur­ers to send boards to sub­con­trac­tors for clean­ing and coat­ing.

• By test­ing, clean­ing and coat­ing the boards in our fa­cil­ity, we re­duce the op­por­tu­nity for units to be con­tam­i­nated prior to coat­ing.

• Full con­for­mal coat­ing qual­i­fi­ca­tion with test­ing in ac­cor­dance to IEC 60068-2 stan­dards.

• Con­trolled process with 100% op­ti­cal in­spec­tion at end of line.

WHICH AP­PLI­CA­TIONS BEN­E­FIT FROM CON­FOR­MAL COAT­ING?

Any ap­pli­ca­tion in which the IGBT Mod­ule and driver are ex­posed to harsh en­vi­ron­men­tal con­di­tions is a po­ten­tial ap­pli­ca­tion for con­for­mal coated parts. These in­clude off­shore and on­shore wind parks, trac­tion main and aux­il­iary in­verter, HVDC sta­tions, pho­to­voltaics plants and Medium Volt­age Drives in min­ing and oil and gas in­dus­try.

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