VNQ600A(8960) 데이터 시트보기 (PDF) - STMicroelectronics

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VNQ600A(8960)

QUAD CHANNEL HIGH SIDE SOLID STATE RELAY

STMicroelectronics 

VNQ600A(8960)

SO-28 DOUBLE ISLAND THERMAL DATA

SO-28 Double island PC Board

CLauytohuictkcnoensdsit=io3n5µomf R, tChoapnpdeZr tahremaesa:s0u.5recmme2n, t3sc(mP2C, B6cFmR24).area= 58mm x 58mm, PCB thickness=2mm,

Thermal calculation according to the PCB heatsink area

Chip 1

ON

OFF

ON

ON

Chip 2

OFF

ON

ON

ON

Tjchip1

RthA x Pdchip1 + Tamb

RthC x Pdchip2 + Tamb

RthB x (Pdchip1 + Pdchip2) + Tamb

(RthA x Pdchip1) + RthC x Pdchip2 + Tamb

Tjchip2

Note

RthC x Pdchip1 + Tamb

RthA x Pdchip2 + Tamb

RthB x (Pdchip1 + Pdchip2) + Tamb

Pdchip1=Pdchip2

(RthA x Pdchip2) + RthC x Pdchip1 + Tamb Pdchip1≠Pdchip2

RthA = Thermal resistance Junction to Ambient with one chip ON

RthB = Thermal resistance Junction to Ambient with both chips ON and Pdchip1=Pdchip2

RthC = Mutual thermal resistance

Rthj-amb Vs PCB copper area in open box free air condition

RTHj_am b

(°C/W)

70

60

50

RthA

40

30

RthB

20

10

0

RthC

1

2

3

4

5

6

7

PCB Cu heatsink area (cm ^2)/island

14/18

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