Diodes ZHB6718 - Manual (Page 2)

THERMAL CHARACTERISTICS
PARAMETER SYMBOL VALUE UNIT
Total Power Dissipation at T
amb
= 25°C*
Any single transistor “on”
Q1 and Q3 “on” or Q2 and Q4 “on” equally
P
tot
1.25
2
W
W
Derate above 25°C*
Any single transistor “on”
Q1 and Q3 “on” or Q2 and Q4 “on” equally
10
16
mW/ °C
mW/ °C
Thermal Resistance - Junction to Ambient*
Any single transistor “on”
Q1 and Q3 “on” or Q2 and Q4 “on” equally
R
th(j-amb)
100
62.5
°C/ W
°C/ W
ZHB6718
100us
Pulse Width
Transient Thermal Resistance
0
D=1
D=0.2
D=0.1
D=0.05
D=0.5
Single Pulse
D=t1
tP
t1
tP
1ms 10ms 100ms 1s 10s 100s
20
40
60
80
100
Single Pulse
Transient Thermal Resistance
Pulse Width
t1
1ms 100us
0
10ms
tP
D=t1
tP
1s 100ms
D=0.2
D=0.05
D=0.1
10s
D=0.5
D=1
100s
10
20
30
40
50
60
T - Temperature (°C)
0
0.5
0 20
1.5
1.0
2.0
Derating curve
40 60 80 100 140 120 160
Single Transistor "On" Q1 and Q3 or Q2 and Q4 "On"
Pd v PCB Area Comparison
0.1
0.1
1
10
Pcb Area (inches squared)
1 10
Single device on
Two devices on †
Minimum Copper
Full Copper
Two devices on †
Single device on
* The power which can be dissipated assuming the device is mounted in a typical manner on a PCB
with copper equal to 2 inches square.
† “Two devices on” is the standard operating condition for the bridge. Eg opposing NPN/PNP pairs
turned on.