GAU212S-15255 데이터 시트보기 (PDF) - Isahaya Electronics

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GAU212S-15255

Universal Gate Drive Prototype Board

Isahaya Electronics 

PRECATION

(1) Confirmation of gate average current

The maximum rating of output current capacity per one circuit of the gate power supply built-in this product is 210mA. (*)

　 Therefore the gate average current must be less than 210mA.

Please calculate the gate average current by the following expression.

Idrive = (Q1＋lQ2l ) X ｆ

Idrive : Gate average current

Q1 : Gate charge on plus bias (Please read it from data sheet of IGBT)

Q2 : Gate charge on minus bias (Please read it from data sheet of IGBT)

f

: Switching frequency

(2) Electric power setting of gate resistance

At the time of the choice of gate resistance, please choose the resistance which can permit the electric power by the following calculation.

Pd = Idrive X 25 + margin

Pd : Total allowable power loss of gate resistance

Idrive : Gate average current

25

: Total output voltage of gate power supply

(*) Please refer to derating curve of VLA502 data sheet.

http://www.idc-com.co.jp

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