VNQ810(2004) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

VNQ810
(Rev.:2004)

QUAD CHANNEL HIGH SIDE DRIVER

STMicroelectronics 

VNQ810

SO-28 DOUBLE ISLAND THERMAL DATA

SO-28 Double island PC Board

LCauytohuict kcnoensdsit=io3n5µomf R, tChoapnpdeZr tahrmeaesa:s0u.r5ecmme2n, 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 he atsink area (cm ^2)/is land

16/21

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