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 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 100mVp-p 240mVp-p 75mVp-p 100mVp-p 240mVp-p 75mVp-p 100mVp-p 240mVp-p 10000uF 24VDC 10000uF 2000uF 10000uF 48VDC 10000uF 2000uF RIPPLE & NOISE (max.) Note.2 75mVp-p OUTPUT VOLTAGE ACCURACY Note.3 1.0% 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 RATED DC INPUT VOLTAGE RANGE 10000uF 2000uF 12VDC 9 ~ 18VDC 18 ~ 36VDC 36 ~ 75VDC 50VDC 100VDC Power up: 8.8VDC, Power down: 8VDC 83% 87% 87% Power up: 17VDC, Power down: 16VDC 84% 88% 88% Power up: 34VDC, Power down: 32.5VDC 84% 89% 89% 7570mA 3780mA SURGE VOLTAGE (100ms max.) 25VDC INPUT UNDER VOLTAGE LOCKOUT EFFICIENCY (Typ.) FULL LOAD DC CURRENT NO LOAD FILTER OUTPUT OVER CURRENT PROTECTION OUTPUT OVER VOLTAGE (Typ.) OUTPUT SHORT CIRCUIT 50mA Pi-network 7200mA 7200mA 3650mA 3650mA 50mA 1900mA 1800mA 1800mA 50mA 110 ~ 150% rated output power Protection type : Over current limiting, recovers automatically after fault condition is removed 115 ~ 140% rated output voltage Protection type : Output voltage clamp by TVS diode 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 REMOTE CONTROL FUNCTION OPERATING OUTPUT TRIMMING 10%, Please refer to "External Output Trimming" for details 5 of case temperature (please refer to "Thermal Curve") WORKING TEMPERATURE (Typ.) -40 ~ +100 ; Thermal shutdown at 100 0% ~ 95% RH max. WORKING HUMIDITY ENVIRONMENT STORAGE TEMP., HUMIDITY -55 ~ +105 , 0 ~ 95% RH TEMP. COEFFICIENT SAFETY STANDARDS SAFETY & ISOLATION VOLTAGE ISOLATION RESISTANCE EMC (Note 4) EMC EMISSION OTHERS I/P-O/P:100M Ohms / 500VDC / 25 / 70% RH Compliance to EN55022 (CISPR22) Class A with external components (please refer to "EMC Suggestion Circuit") EMC IMMUNITY CASE MATERIAL Compliance to EN61000-4-2,3,4,5,6,8; EN55024, light industry level, criteria A MTBF 1000K hrs typ. MIL-HDBK-217F (25 ) 57.9*61*12.7mm (2.28"*2.40"*0.5") (L*W*H) 92g DIMENSION WEIGHT NOTE 0.03%/ (0~60 UL60950-1 approved I/P-O/P:1500VDC, I/P-Case:1500VDC, O/P-Case:1500VDC Aluminum 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 Mechanical Specification series 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 5 3 6 0.04 [1.02] 4 0.60 [15.24] 1.40 [35.56] 2.00 [50.8] 2.40 [61.0] 0.08 [2.03] BOTTOM VIEW 7 2 8 1 9 SIDE VIEW 1.90 [48.3] 2.28 [57.9] Pin No. Assignment Pin No. Assignment Pin No. Assignment Pin No. Assignment 1 2 +Vin -Vin 7 Trim R.C. 4 5 -Vout 8 +R.S. 3 Case 6 -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 2011-09-08 MHB75 75W DC-DC Half-Brick Regulated Single Output Converter series External Output Trimming +Vin (pin1) +Vout (pin9) MHB75 +Vin (pin1) Trim (pin7) MHB75 R Trim-up -Vin (pin4) +Vout (pin9) -Vout (pin5) RTrim-down Trim (pin7) R -Load R -Load -Vin (pin4) -Vout (pin5) Figure 1 : Trim-up voltage setup Figure 2 : Trim-down voltage setup The value of RTrim-up defined as: The value of R Trim-down defined as: (R1-R2 (Vo-Vo, nom)) RTrim-up = (Vo-Vo, nom) (K ) (R1-R2 (Vo, nom-Vo)) R Trim-down = (Vo, nom-Vo) (K ) Where: R Trim-up is the external resistor in Kohm. Where: R Trim-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 Voltage(V) R1 (Kohm) R2 (Kohm) Output Voltage(V) R1 (Kohm) R2 (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 R Trim-up= 0.4 5.8-10.57 0.4 = 6.25 (K ) R Trim-down = 0.4 = 3.93 (K ) 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 -40 oC to +100 oC. 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 Amb ient Temperature and Air Flow without heatsink 50 Na tural Co nvection 20 ft. /min. (0.1 m/s) 100 f t./min. (0 .5 m/s) 45 40 Power Disspated, Pd (Watts ) 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 20 30 40 50 60 Ambi ent Temperature, Ta ( Air Flow Rate Natural convection 20ft./min. (0.1m/s) 100 ft./min. (0.5m/s) Typical Rca 70 80 90 100 ) Air Flow Rate Typical Rca 7.12 /W 500 ft./min. (2.5m/s) 2.96 /W 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 Rca : Thermal resistance from case to ambience 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 (P d ): P d =Pi-Po=Po(1- )/ P d =12 6.25 (1-0.89)/0.89=9.27 Watts Determine airflow: Given: P d =9.27W and Ta=40 Check Thermal Curve above: minimum airflow= 100 ft./min. Verifying: The maximum temperature rise T = P d 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 MHB75 75W DC-DC Half-Brick Regulated Single Output Converter series Case Heat Sink (Optional) Unit:mm Model No.: M-C308 (Vertical Fins) Model No.: M-C091(Horizontal Fins) 58 61 61 48.20 50.8 50.8 48.2 58 48.2 3.3 58 50.80 4- 60.70 Model No.: M-C092 (Horizontal Fins) 2.-8.50 8-2 5.-7.80 25.4 2.7 12.7 2.7 21 3 0.3 R1 CR0.3 0.30 Rca: 3.90 1.74 1.33 1.12 0.97 / W (typ.), at natural convection / W (typ.), at 100ft./min.(LFM) / W (typ.), at 200ft./min.(LFM) / W (typ.), at 300ft./min.(LFM) / W (typ.), at 400ft./min.(LFM) Rca: 4.70 2.89 2.30 1.88 1.59 / W (typ.), at natural convection / W (typ.), at 100ft./min.(LFM) / W (typ.), at 200ft./min.(LFM) / W (typ.), at 300ft./min.(LFM) / W (typ.), at 400ft./min.(LFM) Rca: 3.00 1.44 1.17 1.04 0.95 / W (typ.), at natural convection / W (typ.), at 100ft./min.(LFM) / W (typ.), at 200ft./min.(LFM) / W (typ.), at 300ft./min.(LFM) / 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 M-C091 M-C092 Thermal Pad: 56.9x60x0.25mm Screw: SMP+SW M3x8L 1 2 3 4 EMC Suggestion Circuit Required external components to meet EN55022 class A conducted emission are as below: L1 +Vin +Vin C1 +Vout +Vout MHB75 C2 -Vin -Vin Case Lo ad -Vout -Vout C3 Model No. C1 C2 C3 L1 MHB75-12S 100uF/50V ESR<0.33 100uF/50V ESR<0.33 1000pF 1.5uH MHB75-24S 100uF/50V ESR<0.33 100uF/50V ESR<0.33 1000pF 1.5uH MHB75-48S 33uF/100V ESR<0.46 33uF/100V ESR<0.46 2200pF 8.3uH =05,12,24 File Name:MHB75-SPEC 2011-09-08