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MHB150-48S24

P1-P3P4-P6
0
5
10
15
20
25
30
35
40
45
50
0 102030405060708090100
Power Disspated, P
d
(Watts)
Natural Convection
20 ft./min. (0.1 m/s)
100 ft./min. (0 .5 m/s)
200 ft./min. (1 .0 m/s)
300 ft./min. (1 .5 m/s)
400 ft./min. (2 .0 m/s)
500 ft./min. (2 .5 m/s)
600 ft./min. (3 .0 m/s)
700 ft./min. (3 .5 m/s)
800 ft./min. (4 .0 m/s)
Thermal Curve
The operating case temperature range of MHB-150 series is -40 C to +100 C. When operate the MHB-150 series, proper de-rating or
oo
cooling is needed.
The maximum case temperature under any operating condition should not be exceed 100 C. The following curve is the de-rating
o
curve of MHB-150 series without heat sink.
Power Dissipated vs Amb ient Temperature and Air Flow without heatsink
Am bi e nt Te mp erature, Ta
()℃
Air Flow Rate Air Flow RateTypical Rca Typical Rca
Rca : Thermal resistance from case to
ambience
Natural convection
20ft./min. (0.1m/s)
7.12 /W℃
100 ft./min. (0.5m/s)
500 ft./min. (2.5m/s)
6.21 /W℃
2.96 /W℃
200 ft./min. (1.0m/s)
600 ft./min. (3.0m/s)
5.17 /W℃
2.53 /W℃
300 ft./min. (1.5m/s)
700 ft./min. (3.5m/s)
4.29 /W℃
2.37 /W℃
400 ft./min. (2.0m/s)
800 ft./min. (4.0m/s)
3.64 /W℃
2.19 /W℃
150W DC-DC Half-Brick Regulated Single Output Converter
MHB150 series
File Name:MHB150-SPEC 2018-01-15
Example:
What is the minimum airflow necessary for a MHB150-48S12 operates at nominal line, an output current of 12.5A, and a maximum ambient
temperature of 40 ?℃
Solution:
Given: Vin=48Vdc, Vo=12Vdc, Io=12.5A, (unit efficiency)=89%η
Determine Power dissipation (P ):
d
P =Pi-Po=Po(1- )/d ηη
P =12 12.5 (1-0.89)/0.89=18.54 Watts
d ××
Determine airflow:
Given: P =18.54W and Ta=40
d ℃
Check Thermal Curve above:
minimum airflow= 500 ft./min.
Verifying: The maximum temperature rise 18.54 2.96=54.88△× × ℃T = P Rca=
d
The maximum case temperature 94.88 <100Tc=Ta+ T=△℃℃
Where: The Rca is thermal resistance from case to ambience.
The Ta is ambient temperature and the Tc is case temperature.
Case Heat Sink (Optional)
Unit:mm
150W DC-DC Half-Brick Regulated Single Output Converter
MHB150 series
File Name:MHB150-SPEC 2018-01-15
58
58
48.2
48.2
12.7
25.4
2.7
2.7
50.8 50.8
48.20
CR0.3
2.-8.50
21
8-2
R1
5.-7.80
0.30
3 0.3±
60.70
50.80
4- 3.3ψ
61 61
58
Model No.: M-C308 (Vertical Fins) Model No.: M-C091(Horizontal Fins) Model No.: M-C092 (Horizontal Fins)
Rca:
3.90 / W (typ.), at natural convection℃
1.74 / W (typ.), at 100ft./min.(LFM)℃
1.33 / W (typ.), at 200℃ ft./min.(LFM)
1.12 / W (typ.), at 300℃ ft./min.(LFM)
0.97 / W (typ.), at 400℃ ft./min.(LFM)
Rca:
4.70 / W (typ.), at natural convection℃
2.89 / W (typ.), at 100ft./min.(LFM)℃
2.30 / W (typ.), at 200℃ ft./min.(LFM)
1.88 / W (typ.), at 300℃ ft./min.(LFM)
1.59 / W (typ.), at 400℃ ft./min.(LFM) 0.95 / W (typ.), at 400℃ ft./min.(LFM)
Rca:
3.00 / W (typ.), at natural convection℃
1.44 / W (typ.), at 100ft./min.(LFM)℃
1.17 / W (typ.), at 200℃ ft./min.(LFM)
1.04 / W (typ.), at 300℃ ft./min.(LFM)
EMC Suggestion Circuit
Screw
Washer
Heat Sink
Thermal Pad or suitable
thermal grease
1
2
3
4
※Required external components to meet EN55022 class A conducted emission are as below:
Model No.
MHB150-48S□
□=05,12,24
C1 C2
1000pF 1000pF
47uF/100V
ESR<0.17Ω
47uF/100V
ESR<0.17Ω
C3 C4 L1
3.4uH
Heat Sink Order No.:
M-C308
M-C091
M-C092
Thermal Pad: 56.9x60x0.25mm
Screw: SMP+SW M3x8L
150W DC-DC Half-Brick Regulated Single Output Converter
MHB150 series
File Name:MHB150-SPEC 2018-01-15
Heatsink Assembly
MHB150
C3
C4
+Vin
-Vin
Load
+Vout
-Vout
+Vin
-Vin
+Vout
-Vout
Case
L1
C1 C2
P1-P3P4-P6

MHB150-48S24

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Buy MHB150-48S24
Manufacturer:
Description:
Isolated DC/DC Converters 150W 48Vin 24Vout Half-Brick Regulated
Lifecycle:
New from this manufacturer.
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