VND920 datasheet(15/18 Pages) STMICROELECTRONICS

Part #	VND920

Description	DOUBLE CHANNEL HIGH SIDE SOLID STATE RELAY

PDF	18 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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15 / 18 page

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VND920

Thermal fitting model of a two channels HSD in

SO-28

Pulse calculation formula

Thermal Parameter

Area/island (cm2)0.5

R1= (°C/W)

0.02

R2= (°C/W)

0.1

R3= (°C/W)

2.2

R4= (°C/W)

R5= (°C/W)

R6= (°C/W)

C1= (W.s/°C)

0.0015

C2= (W.s/°C)

7.00E-03

C3= (W.s/°C)

1.50E-02

C4= (W.s/°C)

0.2

C5= (W.s/°C)

1.5

C6= (W.s/°C)

δ Z

THt p 1

–

()

⋅

where

p T

⁄

SO-28 Thermal Impedance Junction Ambient Single Pulse

One channel ON

Two channels ON

on same chip

0.01

0.1

100

0.0001

0.001

0.01

0.1

100

1000

time(s)

Zth(°C/W)

One channel ON

Tw o channels ON

6 cm ^2/is land

3 cm ^2/is land

0,5 cm ^2/is land

T_amb

Pd1

Pd2

Tj_1

Tj_2

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