MBI5025GD データシートの表示（PDF） - Unspecified
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MBI5025GD Datasheet PDF : 18 Pages
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MBI5025
16-channel Constant Current LED Sink Driver
Package Power Dissipation (PD)
The maximum allowable package power dissipation is determined as PD(max) = (Tj – Ta) / Rth(j-a). When 16 output
channels are turned on simultaneously, the actual package power dissipation is PD(act) = (IDD x VDD) + (IOUT x Duty
x VDS x 16). Therefore, to keep PD(act) ≤ PD(max), the allowable maximum output current as a function of duty cycle
is:
IOUT = { [ (Tj – Ta) / Rth(j-a) ] – (IDD x VDD) } / VDS / Duty / 16, where Tj = 150°C.
IOUT vs. Duty Cycle@ Rth(j-a)=46.60℃/W
Max. IOUT(mA)
50
40
30
20
10
0
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Duty Cycle
VDS=1V@Ta=25℃
VDS=1V@Ta=85℃
VDS=2V@Ta=25℃
VDS=2V@Ta=85℃
Max. IOUT(mA)
50
IOUT vs. Duty Cycle@ Rth(j-a)=66.66℃/W
40
30
20
10
0
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Duty Cycle
VDS=1V@Ta=25℃
VDS=1V@Ta=85℃
VDS=2V@Ta=25℃
VDS=2V@Ta=85℃
MBI5025GD
MBI5025GF
Max. IOUT(mA)
IOUT vs. Duty Cycle@ Rth(j-a)=70.90℃/W
50
40
30
20
10
0
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Duty Cycle
VDS=1V@Ta=25℃
VDS=1V@Ta=85℃
VDS=2V@Ta=25℃
VDS=2V@Ta=85℃
MBI5025GP
Condition: IOUT= 45mA,16 output Channels
Device Type
Rth(j-a)(°C/W)
GD
46.60
GF
66.66
GP
70.90
The maximum power dissipation, PD(max) = (Tj – Ta) / Rth(j-a), decreases as the ambient temperature increases.
MBI5025 Maximum Power Dissipation at Various Ambient Temperatures
Power Dissipation (W)
4.0
3.5
GD Type: Rth=46.60℃/W
3.0
GF Type: Rth=66.66℃/W
GP Type: Rth=70.90℃/W
2.5
2.0
1.5
1.0
Safe Operation Area
0.5
0.0
0
10
20
30
40
50
60
70
80
90
100
Ambient Temperature (℃)
- 14 -
September 2006, VA.00
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