TPIC5403

4-CHANNEL INDEPENDENT GATE-PROTECTED

POWER DMOS ARRAY

SLIS038A – SEPTEMBER 1994 – REVISED SEPTEMBER 1995

11

POST OFFICE BOX 655303

THERMAL INFORMATION

JUNCTION-TO-BOARD THERMAL RESISTANCE

vs

PULSE DURATION

† Device mounted on 24in2, 4-layer FR4 printed-circuit board with no heatsink.

NOTE A: Z

θJB(t) = r(t) RθJB

tw = pulse duration

tc = cycle time

d = duty cycle = tw /tc

tw – Pulse Duration – s

10

100

0.0001

0.001

1

0.1

0.01

0.1

1

100

tw

tc

ID

0

d = 0.02

d = 0.01

Single Pulse

10

d = 0.2

d = 0.5

DC Conditions

d = 0.1

d = 0.05

Figure 17