MHB75-24S12 [MEANWELL]
75W DC-DC Half-Brick Regulated Single Output Converter; 75W DC-DC半砖稳压单路输出转换器
| 型号： | MHB75-24S12 |
| 厂家： | 
MEAN WELL ENTERPRISES CO., LTD. |
| 描述： | 75W DC-DC Half-Brick Regulated Single Output Converter |
| 文件： | 总6页 (文件大小：839K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
75W DC-DC Half-Brick Regulated Single Output Converter
MHB75 series
Features :
Half-brick size (2.28" 2.4" 0.5") with industry standard pin out
2:1 wide input range
Protections: Short circuit / Over current / Over voltage / Over temperature
High efficiency up to 89%
1500VDC I/O isolation
Built-in remote ON/OFF control
Built-in remote sense function
Trimming output 10%
Five-sided shield metal case
Optional heat sinks for extended operating temperature
Output 2.5V/3.3V/15V available
Approvals: UL / CUL / CE
3 years warranty
SPECIFICATION
MODEL
MHB75-12S05 MHB75-12S12 MHB75-12S24 MHB75-24S05 MHB75-24S12 MHB75-24S24 MHB75-48S05 MHB75-48S12 MHB75-48S24
DC VOLTAGE
5V
12V
24V
5V
12V
24V
5V
12V
24V
CURRENT RANGE
RATED POWER
0 ~ 15A
75W
0 ~ 6.25A
0 ~ 3.13A
0 ~ 15A
0 ~ 6.25A
0 ~ 3.13A
0 ~ 15A
0 ~ 6.25A
0 ~ 3.13A
RIPPLE & NOISE (max.) Note.2 75mVp-p
100mVp-p
240mVp-p
75mVp-p
100mVp-p
240mVp-p
75mVp-p
100mVp-p
240mVp-p
VOLTAGE ACCURACY Note.3
LINE REGULATION
1.0%
0.2%
0.2%
OUTPUT
LOAD REGULATION
SWITCHING FREQUENCY (Typ.) 400KHz for 12/24Vin, 300KHz for 48Vin
EXTERNAL TRIM ADJ. RANGE (Typ.) 10%
EXTERNAL CAPACITIVE LOAD (max.) 10000uF
10000uF
2000uF
10000uF
24VDC
10000uF
2000uF
10000uF
48VDC
10000uF
2000uF
RATED DC INPUT
VOLTAGE RANGE
12VDC
9 ~ 18VDC
18 ~ 36VDC
50VDC
36 ~ 75VDC
100VDC
SURGE VOLTAGE (100ms max.) 25VDC
UNDER VOLTAGE LOCKOUT Power up: 8.8VDC, Power down: 8VDC
Power up: 17VDC, Power down: 16VDC
Power up: 34VDC, Power down: 32.5VDC
INPUT
83%
EFFICIENCY (Typ.)
FULL LOAD
DC CURRENT
87%
87%
84%
88%
88%
84%
89%
89%
7570mA
50mA
7200mA
7200mA
3780mA
50mA
3650mA
3650mA
1900mA
50mA
1800mA
1800mA
NO LOAD
FILTER
Pi-network
110 ~ 150% rated output power
OUTPUT OVER CURRENT
Protection type : Over current limiting, recovers automatically after fault condition is removed
115 ~ 140% rated output voltage
OUTPUT OVER VOLTAGE (Typ.)
PROTECTION
Protection type : Output voltage clamp by TVS diode
Protection type : Can be continuous, recovers automatically after fault condition is removed
OUTPUT SHORT CIRCUIT
OVER TEMPERATURE
REMOTE CONTROL
100
5 of case temperature
Please refer to "Remote ON/OFF Control" for details
FUNCTION
OPERATING
10%, Please refer to "External Output Trimming" for details
OUTPUT TRIMMING
-40 ~ +100 ; Thermal shutdown at 100
0% ~ 95% RH max.
5 of case temperature (please refer to "Thermal Curve")
WORKING TEMPERATURE (Typ.)
WORKING HUMIDITY
ENVIRONMENT
STORAGE TEMP., HUMIDITY -55 ~ +105 , 0 ~ 95% RH
TEMP. COEFFICIENT
SAFETY STANDARDS
ISOLATION VOLTAGE
0.03%/ (0~60
UL60950-1 approved
I/P-O/P:1500VDC, I/P-Case:1500VDC, O/P-Case:1500VDC
I/P-O/P:100M Ohms / 500VDC / 25 / 70% RH
SAFETY &
ISOLATION RESISTANCE
EMC EMISSION
EMC
(Note 4)
Compliance to EN55022 (CISPR22) Class A with external components (please refer to "EMC Suggestion Circuit")
Compliance to EN61000-4-2,3,4,5,6,8; EN55024, light industry level, criteria A
Aluminum
EMC IMMUNITY
CASE MATERIAL
MTBF
1000K hrs typ. MIL-HDBK-217F (25
)
OTHERS
NOTE
DIMENSION
WEIGHT
57.9*61*12.7mm (2.28"*2.40"*0.5") (L*W*H)
92g
1. All parameters NOT specially mentioned are measured at 12,24,48VDC input, rated load and 25 of ambient temperature.
2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 1uf ceramic & 10uf tantalum capacitor across output.
3. The power supply need to connect "+Vout" to "+R.S" and "-Vout" to "-R.S".
4. The power supply is considered a component which will be installed into a final equipment. The final equipment must be re-confirmed that it still meets
EMC directives. For guidance on how to perform these EMC tests, please refer to EMI testing of component power supplies.
File Name:MHB75-SPEC 2011-09-08
75W DC-DC Half-Brick Regulated Single Output Converter
MHB75 series
Mechanical Specification
Unit:inch[mm]
All Dimensions In Inches [mm]
Tolerance Inches: X.XX= 0.02 , X.XXX= 0.010
Millimeters: X.X= 0.5 , X.XX= 0.25
0.18 min.
[4.6]
0.50
[12.7]
Mounting Inserts M3*0.5
R1.50
BOTTOM VIEW
4
3
5
6
7
2
1
8
9
SIDE VIEW
1.90
[48.3]
2.28
[57.9]
Pin No. Assignment
Assignment
+Vin
Assignment
-Vin
Assignment
Trim
Pin No.
Pin No.
Pin No.
7
8
1
2
4
5
+R.S.
R.C.
-Vout
-R.S.
Case
3
6
+Vout
9
Remote ON/OFF Control
The MHB75 series allow the user to switch the power ON and OFF electronically by their remote ON/OFF feature.
The MHB75 series are available with "Positive Logic" (standard) or "Negative Logic" (option).
Logic table
Logic State(pin2)
Positive logic
Negative logic
Logic Low-Switch Closed Power OFF(<0.8Vdc)
Power ON(<0.8Vdc)
Logic High-Switch Open Power ON(Open circuit) Power OFF(Open circuit)
Note: 1.Logic compatibility : R.C.(pin2) ~ -Vin(pin4).
2.Suffix "N" to the model number with Negative logic remote ON/OFF.
R.C.(pin2)
MHB75
High singal here
disable output
-Vin(pin4)
Example control circuit(positive logic)
File Name:MHB75-SPEC 2011-09-08
75W DC-DC Half-Brick Regulated Single Output Converter
MHB75 series
External Output Trimming
+Vin
(pin1)
+Vout
(pin9)
+Vin
(pin1)
+Vout
(pin9)
RTrim-down
Trim
(pin7)
Trim
(pin7)
MHB75
MHB75
R-Load
RTrim-up
R-Load
-Vin
(pin4)
-Vout
(pin5)
-Vin
(pin4)
-Vout
(pin5)
Figure 1 : Trim-up voltage setup
Figure 2 : Trim-down voltage setup
The value of RTrim-up defined as:
(R1-R2 (Vo-Vo, nom))
The value of RTrim-down defined as:
(R1-R2 (Vo, nom-Vo))
(K
)
(K )
=
=
RTrim-up
RTrim-down
(Vo-Vo, nom)
(Vo, nom-Vo)
Where: RTrim-up is the external resistor in Kohm.
Where: RTrim-down is the external resistor in Kohm.
Vo,nom is the nominal output voltage.
Vo is the desired output voltage.
Vo,nom is the nominal output voltage.
Vo is the desired output voltage.
R1 and R2 are inside the unit and list in Table 1
R1 and R2 are inside the unit and list in Table 2.
Output
Voltage(V)
R1
(Kohm)
R2
(Kohm)
Output
Voltage(V)
R1
(Kohm)
R2
(Kohm)
5V
12V
24V
5.8
8.25
5V
12V
24V
5.8
86.45
430
10.57
60.1
130
19.656
42.215
13.304
16.923
Table 1
Table 2
For example, to Trim-up the output
voltage of 5.0V model (MHB75-48S05)
by 8% to 5.4V, RTrim-up is calculated
For example, to Trim-down the output
Voltage of 5.0V model (MHB75-48S05)
by 8% to 4.6V, RTrim-down is
as follows:
calculated as follows :
Vo - Vo,nom = 5.4 -5.0 = 0.4V
Vo,nom - Vo = 5.0 - 4.6 = 0.4 V
R1 = 5.8 Kohm
R2 = 8.25 Kohm
R1 = 5.8 Kohm
R2 = 10.57 Kohm
5.8-8.25 0.4
5.8-10.57 0.4
RTrim-up=
= 6.25 (K
)
RTrim-down =
= 3.93 (K )
0.4
0.4
File Name:MHB75-SPEC 2011-09-08
75W DC-DC Half-Brick Regulated Single Output Converter
MHB75 series
Thermal Curve
The operating case temperature range of MHB-75 series is -40oC to +100oC. When operate the MHB-75 series, proper de-rating or
cooling is needed.
The maximum case temperature under any operating condition should not be exceed 100oC. The following curve is the de-rating
curve of MHB-75 series without heat sink.
Power Dissipated vs Ambient Temperature and Air Flow without heatsink
50
Natural Convection
20 ft./min. (0.1 m/s)
45
100 ft./min. (0.5 m/s)
40
200 ft./min. (1.0 m/s)
300 ft./min. (1.5 m/s)
35
30
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)
25
20
15
10
5
0
0
10
20
30
40
50
60
70
80
90
100
(
)
Ambient Temperature, Ta
Air Flow Rate
Typical Rca
7.12 / W
Air Flow Rate
Typical Rca
2.96 / W
Natural convection
20ft./min. (0.1m/s)
100 ft./min. (0.5m/s)
500 ft./min. (2.5m/s)
Rca : Thermal resistance from case to
ambience
6.21 / W
5.17 / W
4.29 / W
3.64 / W
600 ft./min. (3.0m/s)
700 ft./min. (3.5m/s)
800 ft./min. (4.0m/s)
2.53 / W
2.37 / W
2.19 / W
200 ft./min. (1.0m/s)
300 ft./min. (1.5m/s)
400 ft./min. (2.0m/s)
Example:
What is the minimum airflow necessary for a MHB75-48S12 operates at nominal line, an output current of 6.25A, and a maximum ambient
temperature of 40
Solution:
?
Given: Vin=48Vdc, Vo=12Vdc, Io=6.25A, (unit efficiency)=89%
Determine Power dissipation (Pd):
Pd=Pi-Po=Po(1- )/
Pd=12 6.25 (1-0.89)/0.89=9.27 Watts
Determine airflow:
Given: Pd=9.27W and Ta=40
Check Thermal Curve above:
minimum airflow= 100 ft./min.
Verifying: The maximum temperature rise T = Pd Rca=9.27 6.21=57.57
The maximum case temperature Tc=Ta+ T=97.57 <100
Where: The Rca is thermal resistance from case to ambience.
The Ta is ambient temperature and the Tc is case temperature.
File Name:MHB75-SPEC 2011-09-08
75W DC-DC Half-Brick Regulated Single Output Converter
MHB75 series
Case Heat Sink (Optional)
Unit:mm
Model No.: M-C308 (Vertical Fins)
Model No.: M-C091(Horizontal Fins)
Model No.: M-C092 (Horizontal Fins)
61
61
58
48.20
50.8
50.8
2.-8.50
8-2
5.-7.80
R1
CR0.3
0.30
Rca:
Rca:
Rca:
3.90 / W (typ.), at natural convection
1.74 / W (typ.), at 100ft./min.(LFM)
1.33 / W (typ.), at 200ft./min.(LFM)
1.12 / W (typ.), at 300ft./min.(LFM)
0.97 / W (typ.), at 400ft./min.(LFM)
4.70 / W (typ.), at natural convection
2.89 / W (typ.), at 100ft./min.(LFM)
2.30 / W (typ.), at 200ft./min.(LFM)
1.88 / W (typ.), at 300ft./min.(LFM)
1.59 / W (typ.), at 400ft./min.(LFM)
3.00 / W (typ.), at natural convection
1.44 / W (typ.), at 100ft./min.(LFM)
1.17 / W (typ.), at 200ft./min.(LFM)
1.04 / W (typ.), at 300ft./min.(LFM)
0.95 / W (typ.), at 400ft./min.(LFM)
File Name:MHB75-SPEC 2011-09-08
75W DC-DC Half-Brick Regulated Single Output Converter
MHB75 series
Heatsink Assembly
Screw
Washer
Heat Sink
Thermal Pad or suitable
thermal grease
Heat Sink Order No.:
M-C308
1
M-C091
2
M-C092
3
Thermal Pad: 56.9x60x0.25mm
Screw: SMP+SW M3x8L
4
EMC Suggestion Circuit
Required external components to meet EN55022 class A conducted emission are as below:
L1
+Vin
+Vout
+Vin
+Vout
-Vout
MHB75
Case
Lo ad
C1
C2
-Vin
-Vout
-Vin
C3
Model No.
C1
C2
C3
L1
100uF/50V
ESR<0.33
100uF/50V
ESR<0.33
1000pF
MHB75-12S
1.5uH
1.5uH
100uF/50V
ESR<0.33
100uF/50V
ESR<0.33
1000pF
2200pF
MHB75-24S
33uF/100V
ESR<0.46
33uF/100V
ESR<0.46
MHB75-48S
=05,12,24
8.3uH
File Name:MHB75-SPEC 2011-09-08
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