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10
Hi-Rel
Grade
MGDM-150 Low Input Series
Gaia Converter FC02-009.08/06 Revision N
©
4
0
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0
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MGDS-150-O-x Series Thermal Curves
no heatsink
no heatsink 200LFM
no heatsink 400 LFM
no heatsink 1000 LFM
heatsink
heatsink 200 LFM
heatsink 400 LFM
heatsink 1000 LFM
Ambient temperature (°C)
10- Thermal Characteristics (continued)
The two formulas (A) and (B) described in previous page :
• Pdiss = Pout(1/h
h
h
h
h
- 1)
(A)
• Ta = 105°C - Rth(b-a) x Pdiss
(B)
conduct to curves determining the ambient temperature
admissible as a function of output power for various heat
transfert conditions.
In particular, as example the following typical curves are
calculated with :
• no heatsink
• a Fischer Elektronik heatsink reference SKDC5159SA
and a Berquist «Silpad» for various cooling conditions.
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60
70
80
90
100
110
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
MGDS-150-H-x Series Thermal Curves
no heatsink
no heatsink 200LFM
no heatsink 400 LFM
no heatsink 1000 LFM
heatsink
heatsink 200 LFM
heatsink 400 LFM
heatsink 1000 LFM
Ambient temperature (°C)