TPIC5404

HBRIDGE POWER DMOS ARRAY

SLIS023B − MARCH 1994 − REVISED SEPTEMBER 1995

2−11

POST OFFICE BOX 655303

POST OFFICE BOX 1443

THERMAL INFORMATION

NORMALIZED JUNCTION - TO -AMBIENT THERMAL RESISTANCE

vs

PULSE DURATION

tw − Pulse Duration − s

0.1

10

1

0.0001

0.001

0.01

0.001

0.0001

0.01

0.1

110

DC Conditions

† Device mounted on FR4 printed-circuit board with no heat sink

Single Pulse

tw

tc

ID

0

d = 0.5

d = 0.2

d = 0.1

d = 0.02

d = 0.05

d = 0.01

NOTE A: ZθA(t) = r(t) RθJA

tw = pulse duration

tc = cycle time

d = duty cycle = tw/tc

Figure 18