75W DC-DC Half-Brick Regulated Single Output Converter MHB75 series ■�=��������6 ‧× &�� ,!���3���’��4����+ ���+×$��+5�(��)�������������������������� ‧�6��(�������������*� ‧7����������6�/)������������8��2�����������8��2���2����*��8��2�������������� ‧&�*)�� ���������������9: ‧��$$����;8������������ ‧<����,������������8�==�������� ‧<����,���������������� ������� ‧�������*��������±�$: ‧=�2�,�������)��������������� ‧���������)�������3�� ����>���������������*������������ ‧�����������8-�-�8�����2����!�� ‧�����2���6�?@�8��?@�8��1 ‧-�������(������� � 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 0 ~ 15A 0 ~ 6.25A 0 ~ 3.13A 0 ~ 15A 0 ~ 6.25A 0 ~ 3.13A 0 ~ 15A 0 ~ 6.25A 0 ~ 3.13A RATED POWER 75W 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 ±1.0% OUTPUT LINE REGULATION ±0.2% LOAD REGULATION ±0.2% SWITCHING FREQUENCY (Typ.) 400KHz for 12/24Vin, 300KHz for 48Vin EXTERNAL TRIM ADJ. RANGE (Typ.) ±10% EXTERNAL CAPACITIVE LOAD (max.) 10000uF 10000uF 2000uF 10000uF 10000uF 2000uF 10000uF 10000uF 2000uF 24VDC 48VDC RATED DC INPUT 12VDC VOLTAGE RANGE 9 ~ 18VDC 18 ~ 36VDC 36 ~ 75VDC SURGE VOLTAGE (100ms max.) 25VDC 50VDC 100VDC UNDER VOLTAGE LOCKOUT Power up: 8.8VDC, Power down: 8VDC Power up: 17VDC, Power down: 16VDC Power up: 34VDC, Power down: 32.5VDC INPUT EFFICIENCY (Typ.) 83% 87% 87% 84% 88% 88% 84% 89% 89% FULL LOAD 7570mA 7200mA 7200mA 3780mA 3650mA 3650mA 1900mA 1800mA 1800mA DC CURRENT NO LOAD 50mA 50mA 50mA 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 OUTPUT SHORT CIRCUIT Protection type : Can be continuous, recovers automatically after fault condition is removed 100℃±5℃of case temperature OVER TEMPERATURE Please refer to "Remote ON/OFF Control" for details FUNCTION REMOTE CONTROL OPERATING ±10%, Please refer to "External Output Trimming" for details OUTPUT TRIMMING -40 ~ +100℃℃ ; Thermal shutdown at 100±5℃of case temperature (please refer to "Thermal Curve") WORKING TEMPERATURE (Typ.) WORKING HUMIDITY 0% ~ 95% RH max. ENVIRONMENT STORAGE TEMP., HUMIDITY -55 ~ +105℃, 0 ~ 95% RH TEMP. COEFFICIENT ±℃ 0.03%/ (0~60℃) SAFETY STANDARDS UL60950-1 approved SAFETY & ISOLATION VOLTAGE I/P-O/P:1500VDC, I/P-Case:1500VDC, O/P-Case:1500VDC ISOLATION RESISTANCE EMC I/P-O/P:100M Ohms / 500VDC / 25℃/ 70% RH (Note 4) Compliance to EN55032 (CISPR32) Class A with external components (please refer to "EMC Suggestion Circuit") EMC EMISSION EMC IMMUNITY Compliance to EN61000-4-2,3,4,5,6,8; EN55024, light industry level, criteria A CASE MATERIAL Aluminum MTBF 1000K hrs typ. MIL-HDBK-217F (25℃) OTHERS DIMENSION 57.9*61*12.7mm (2.28"*2.40"*0.5") (L*W*H) 92g WEIGHT ����������������������������������������������������������������������������������������������℃�� ���!����������������� NOTE ���"������#������������������������$%&’�� �!���(���)�!������*�����+��(����������,(���������������(��)����� ���������#��$� ���������������������������������� -���)����(��������������������������+.����+����+."�/+�����+,����+����+,"�/+� ����)����(������������������������������������()��)�(����!������������������� ������0����������)�� ������0�������������!����,��� �������)����������������� ����1%���������2����For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.” File Name:MHB75-SPEC 2017-09-07 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. 0.50 [4.6] [12.7] Mounting Inserts M3*0.5 R1.50 BOTTOM VIEW 45 36 7 28 19 SIDE VIEW 1.90 [48.3] 2.28 [57.9] Pin No. Assignment Pin No. Assignment Pin No. Assignment Pin No. Assignment +Vin -Vin 7 Trim 14 25 R.C. -Vout 8 +R.S. 36 Case -R.S. 9 +Vout 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 2017-09-07 2.40 [61.0] 2.00 [50.8] 1.40 [35.56] 0.60 [15.24] ψ0.04 [1.02] ψ0.08 [2.03] 75W DC-DC Half-Brick Regulated Single Output Converter MHB75 series External Output Trimming +Vin +Vout +Vin +Vout (pin1) (pin9) (pin1) (pin9) RTrim-down Trim Trim MHB75 MHB75 (pin7) (pin7) R-Load RTrim-up R-Load -Vin -Vout -Vin -Vout (pin4) (pin5) (pin4) (pin5) Figure 1 : Trim-up voltage setup Figure 2 : Trim-down voltage setup The value of RTrim-up defined as: The value of RTrim-down defined as: (R1-R2×(Voo -V , nom)) (R1-R2×(Voo , nom-V )) (KΩ) (KΩ) = = RTrim-up RTrim-down (Voo -V , nom) (Voo , nom-V ) 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,nom is the nominal output voltage. Vo is the desired 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 R1 R2 Output R1 R2 Voltage(V) (Kohm) (Kohm) Voltage(V) (Kohm) (Kohm) 5V 5.8 8.25 5V 5.8 10.57 12V 19.656 13.304 12V 86.45 60.1 24V 42.215 16.923 24V 430 130 Table 1 Table 2 For example, to Trim-up the output For example, to Trim-down the output voltage of 5.0V model (MHB75-48S05) Voltage of 5.0V model (MHB75-48S05) by 8% to 5.4V, RTrim-up is calculated 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 R1 = 5.8 Kohm R2 = 8.25 Kohm R2 = 10.57 Kohm 5.8-8.25×0.4 5.8-10.57×0.4 RTrim-up=== 6.25 (KΩΩ )) RTrim-down = 3.93 (K 0.4 0.4 File Name:MHB75-SPEC 2017-09-07 75W DC-DC Half-Brick Regulated Single Output Converter MHB75 series Thermal Curve oo The operating case temperature range of MHB-75 series is -40 C to +100 C. When operate the MHB-75 series, proper de-rating or cooling is needed. o The maximum case temperature under any operating condition should not be exceed 100 C. 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 f t./min. (0 .5 m/s) 40 200 f t./min. (1 .0 m/s) 35 300 f t./min. (1 .5 m/s) 30 25 400 f t./min. (2 .0 m/s) 20 500 f t./min. (2 .5 m/s) 15 600 f t./min. (3 .0 m/s) 10 700 f t./min. (3 .5 m/s) 5 800 f t./min. (4 .0 m/s) 0 0 10 2030405060708090 100 () ℃ Ambi ent Temperature, Ta Air Flow Rate Typical Rca Air Flow Rate Typical Rca Natural convection 7.12℃/ W 500 ft./min. (2.5m/s) 2.96℃/ W Rca : Thermal resistance from case to 20ft./min. (0.1m/s) ambience 100 ft./min. (0.5m/s) 6.21℃/ W 600 ft./min. (3.0m/s) 2.53℃/ W 200 ft./min. (1.0m/s) 5.17℃/ W 700 ft./min. (3.5m/s) 2.37℃/ W 300 ft./min. (1.5m/s) 4.29℃/ W 800 ft./min. (4.0m/s) 2.19℃/ W 400 ft./min. (2.0m/s) 3.64℃/ W 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,η(unit efficiency)=89% Determine Power dissipation (Pd): Pd=Pi-Po=Po(1-ηη )/ 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 2017-09-07 Power Disspated, P (Watts) d 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) 58 61 61 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 4.70℃/ W (typ.), at natural convection 3.00℃/ W (typ.), at natural convection 1.74℃/ W (typ.), at 100ft./min.(LFM) 2.89℃/ W (typ.), at 100ft./min.(LFM) 1.44℃/ W (typ.), at 100ft./min.(LFM) 1.33℃/ W (typ.), at 200ft./min.(LFM) 2.30℃/ W (typ.), at 200ft./min.(LFM) 1.17℃/ W (typ.), at 200ft./min.(LFM) 1.12℃/ W (typ.), at 300ft./min.(LFM) 1.88℃/ W (typ.), at 300ft./min.(LFM) 1.04℃/ W (typ.), at 300ft./min.(LFM) 0.97℃/ W (typ.), at 400ft./min.(LFM) 1.59℃/ W (typ.), at 400ft./min.(LFM) 0.95℃/ W (typ.), at 400ft./min.(LFM) File Name:MHB75-SPEC 2017-09-07 4-ψ3.3 60.70 21 50.80 3±0.3 12.7 58 2.7 48.2 25.4 58 2.7 48.2 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 4 Screw: SMP+SW M3x8L EMC Suggestion Circuit ※Required external components to meet EN55022 class A conducted emission are as below: L1 +Vin +Vout +Vin +Vout MHB75 Lo ad C1 C2 Case -Vin -Vin -Vout -Vout C3 Model No. C1 C2 C3 L1 100uF/50V 100uF/50V MHB75-12S□ 1000pF 1.5uH ESR<0.33Ω ESR<0.33Ω 100uF/50V 100uF/50V 1.5uH 1000pF MHB75-24S□ ESR<0.33Ω ESR<0.33Ω 33uF/100V 33uF/100V MHB75-48S□ 8.3uH 2200pF ESR<0.46Ω ESR<0.46Ω □=05,12,24 File Name:MHB75-SPEC 2017-09-07