TECHNICAL DATASHEET Rev. D MPQ24S5-50C 50 W DC-DC Converter 10-36 Vdc Input 5 Vdc Output at 10 A Quarter-Brick Package Features: Over 87% Efficient at Full Load Fast Transient Response Operation to No Load Output Trim ±10% Remote ON/OFF Remote Sense Compensation Low Output Ripple Fixed Switching Frequency Output Over Current Protection Output Short Circuit Protection Over Temperature Protection 1000 V Isolation 100% Burn In Heatsink Available Description: The MPQ24 series is a high density, low voltage input quarter brick converter that incorporates the desired features required in today’s demanding applications while maintaining low cost. When performance, reliability, and low cost are needed, the MPQ series delivers. (888) 597-WALL www.wallindustries.com 1 of 11 WALL INDUSTRIES, INC. Rev. D Technical Specifications TECHNICAL DATASHEET MPQ24S5-50C Model No. MPQ24S5-50C All specifications are based on 25°C, Nominal Input Voltage and Maximum Output Current unless otherwise noted. We reserve the right to change specifications based on technological advances. SPECIFICATION Related condition Switching Frequency INPUT (Vin) Operating Voltage Range UVLO Turn On at UVLO Turn Off at UVLO Hysterisis Maximum Input Current (Graph 3) No Load Input Current (Graph 5) Input Current under “Remote Off” (Graph 6) Reflected Ripple Current (Photos 1 & 2) Input Surge Voltage Low Line No Load Active High Unit Measured with a 120 µF Alum. Elect. Input Capacitor 100 mS EFFICIENCY (Graph 1) Min Nom Max Unit - 200 - kHz 10 9.8 9.4 - 24 10.0 9.7 0.3 5.8 0.081 3.1 192 87 36 10.3 9.9 50 - Vdc Vdc Vdc Vdc A A mA mA Vdc % Vdc % % % % / °C Vdc % mVpk-pk mVpk-pk A OUTPUT (Vo) Voltage Set Point ±Sense shorted to ±Vout Voltage Adjustment (Table 2) Max Output limited to 90W Load Regulation (Graph 7) Line Regulation (Graph 8) Temperature Drift (Graph 9) ±Sense shorted to ±Vout ±Sense shorted to ±Vout Remote Sense Compensation Ripple (Photos 7, 9 & 11) Spikes (Photos 7, 9 & 11) Current Current Limit Max Output limited to 50W (as measured at the converter output pins) With 1 µF ceramic & 10 µF Tantalum With 1 µF ceramic & 10 µF Tantalum Power Limited-Dependent upon SENSE compensation and TRIM adjustment Over Voltage Limit DYNAMIC RESPONSE Load step / V (Photos 8, 10 & 12) Recovery Time (Photos 8, 10 & 12) Turn On Delay (Photo 3) Turn On Overshoot (Photos 3 & 5) Hold Up Time (Photo 4) REMOTE ON/OFF Remote ON – Active High Remote OFF – Active High Remote ON/OFF pin Floating – Active High ION/OFF Sink to pull low – Active High Remote ON – Active Low Remote OFF – Active Low Remote ON/OFF pin Floating – Active Low ION/OFF Sink to pull low – Active Low ION/OFF Source to drive high – Active High or Low Turn On Delay – (Photo 5) Turn Off Delay – (Photo 6) ISOLATION Input-Output Input/Output-Chassis Isolation Resistance Isolation Capacitance THERMAL Ambient (Graph 2) Over Temperature Protection Storage Temperature MTBF MECHANICAL Weight (888) 597-WALL 4.970 -0.60 4.50 -10% - - 0 82 82 - 5.030 +0.60 5.50 +10% 0.1 0.1 0.025 5.50 10% 100 150 10.0 12 14 16 A 5.8 54.0 58 Vdc 5.000 5.00 0.02 0.02 0.013 25% to 100% Io, di/dt=0.025A/uS 264 Recovery to within 1% Nominal Vout 1 From Vin (min) to Vout (mom) 10 Full Load Resistive 0.0 From Vin (min) to VULVO_Turn_Off 0 Active High or Active Low (For Active Low add an ‘R’ to the end of the Part Number) Min High to Enable 1.5 Max Low to Disable 0.3 Over Operating Voltage Range 1.6 5.2 VON/OFF =0V, Vin=36 V 0.15 Max Low to Enable 0.8 Min High to Disable 2.1 Over Operating Voltage Range 2.3 6.2 VON/OFF =0V, Vin=36V 0.6 0 Enable (max Low) to Vout (min) 3 Enable (0V) to Vout (min) 100 1 minute 1 minute at 25°C Max. Ambient limited by Derating Curves (Graph 2) Case Temperature 1000 1000 20 -40 -55 Calculated Using Bellcore TR-332 Method 1 case 3 - www.wallindustries.com 0.01 - Graph 2 25 110 125 1,250,300 See Figure 1 61 - Vdc mV ms ms % mS Vdc Vdc Vdc mA Vdc Vdc mA mA ms µS Vdc Vdc GΩ µF °C °C °C hours g Page 2 of 11 WALL INDUSTRIES, INC. TECHNICAL DATASHEET Rev. D MPQ24S5-50C Table 1: Pin Assignments Pin # Pin Name 1 2 3 4 5 6 7 8 Function +Vin Enable -Vin +Vout +SENSE TRIM -SENSE -Vout Comments Positive Input Remote On/Off Negative Input Negative Output Negative Remote Sense Output Voltage Trim Positive Remote Sense Positive Output If not used, leave open for standard unit, short to –Vin on ‘R’ units. If not used, short to –Vo. If not used, leave open. If not used, short to +Vo. Figure 1: Mechanical Dimensions Unit: inches [mm] ANGLES ±1 .XX=±.02[0.5] .XXX=±.010[0.25] .51 [13.0] 2.37 [60.2] .00 [0.0] .60 [15.2] DOT DENOTES PIN-1 .30 [7.6] .30 [7.6] .60 [15.2] THIRD ANGLE PROJECTION .45 [11.4] .00 [0.0] DO NOT SCALE DRAWING INTERPRET DIMENSION AND TOLERANCE PER ASME Y14.5M - 1994 .15 [3.8] THIRD ANGLE PROJECTION .00 [0.0] DO NOT SCALEARE DRAWING ALL DIMENSONS IN INCHES XX ] ARE IN MILLIMETERS INTERPRET [DIMENSION AND TOLERANCE TOLERANCES: PERAPPLIED ASME Y14.5M - 1994 ANGLES= ±1° .XX=±.02[0.5] .XXX=±.010[0.25] .00 [0.0] .112(NO:4)-40UNC-2B 4X MAX SCREW DEPTH .100 FROM SURFACE-A 4X MAX APPLIED RECIEVING TORQUE: 6.0 lbf in [ 0.68 N m] UNLESS OTHERWISE SPECIFIED Ø.040 [1.02] TRIM Ø.040 [1.02] 7 -SENSE Ø.040 [1.02] 8 -Vout Ø.062 [1.57] LABEL 1.860 [47.24] NOTES: -A- SEE NOTE-4 .19 [4.7] .005 INTERFACE-PLANE +SENSE 6 .47 [11.9] 4 5 6 7 8 .26 [6.5] 5 3 3 .60 [15.1] Ø.062 [1.57] 4 5 6 7 8 2 .41 [10.4] Ø.062 [1.57] 1 1.030 [26.16] INTERFACE-PLANE Ø.040 [1.02] -Vin +Vout 2 XXXX ON/OFF 3 4 XXXX Ø.062 [1.57] MODEL NAME 2 +Vin WALL INDUSTRIES 1 1 .47 [11.9] PIN DESIGNATION PIN Ø 1.54 [39.1] .26 [6.5] .19 [4.7] 1. PIN TO PIN TOLERANCE: ±.010 [±0.25] MEASURED AT STANDOFF FEATURE ONLY, DATUM-B. 2. PIN DIAMETER TOLERANCE OF : ±.005 [±0.13] MEASUREMENT READING APPLIES TO AREA FROM INTERFACE-PLANE SURFACE DATUM-C TO END OF PIN ONLY. 3. UNLESS OTHERWISE SPECIFIED. 4. THERMAL TRANSFER PLATE MATERIAL: .040 [1.02] THICK, ALUMINUM ALLOY 3003-0, PER: QQA 250/2 WITH BLACK SOFT SULFURIC ANODIZE FINISH. .00 [0.0] INTERFACE-PLANE C PIN END .071±.005 [1.80±0.13] STANDOFF DIMENSION Ø.040 [1.02] PINS ONLY 4X RECOMMENDED FINISHED RECEIVING PCB STAND-OFF HOLE Ø.052±.003 [1.32±0.08] PIN-2 SHOWN FOR DIMENSIONS B .20 MIN [5.1 MIN] SEE NOTE-3 PIN LENGTH FROM INTERFACE-PLANE ONLY 2.00 [50.8] Mechanical Dimensions (Heatsink Option – “HS” suffix) Unit: inches [mm] .60 [15.2] .00 [0.0] .30 [7.6] .15 [3.8] .51 [13.0] 2.37 [60.2] .45 [11.4] .00 [0.0] DOT DENOTES PIN-1 .00 [0.0] .00 [0.0] .30 [7.6] .60 [15.2] .112(NO:4)-40UNC-2B 4X MAX SCREW DEPTH .100 FROM SURFACE-A 4X MAX APPLIED RECIEVING TORQUE: 6.0 lbf in [ 0.68 N m] 3 .85 +.04 21.5 +1.0 -0.5 -.02 .60 [15.1] .47 [11.9] 4 5 6 7 8 1.860 [47.24] LABEL .41 [10.4] INTERFACE-PLANE 4 5 6 7 8 2 -A- INTERFACE-PLANE XXXX 3 1 .26 [6.5] XXXX XXXXXXXXXXXHS WALL INDUSTRIES 2 1.030 [26.16] 1 1.54 [39.1] .26 [6.5] .47 [11.9] SEE NOTE-4 PIN DESIGNATION PIN Ø .19 [4.7] INTERFACE-PLANE C .071±.005 [1.80±0.13] STANDOFF DIMENSION Ø.040 [1.02] PINS ONLY 6X RECOMMENDED FINISHED RECEIVING PCB STAND-OFF HOLE Ø.052±.003 [1.32±0.08] B .20 MIN [5.1 MIN] SEE NOTE-3 PIN LENGTH FROM INTERFACE-PLANE ONLY 2.00 [50.8] .19 [4.7] (888) 597-WALL 3 1. PIN TO PIN TOLERANCE: ±.010 [±0.25] MEASURED AT STANDOFF FEATURE ONLY, DATUM-B. 2. PIN DIAMETER TOLERANCE OF : ±.005 [±0.13] MEASUREMENT READING APPLIES TO AREA FROM INTERFACE-PLANE SURFACE DATUM-C TO END OF PIN ONLY. 3. STANDARD PIN LENGTH UNLESS OTHERWISE SPECIFIED. 4. THERMAL TRANSFER PLATE MATERIAL: .040 [1.02] THICK, ALUMINUM ALLOY 3003-0, PER: QQA 250/2 WITH BLACK SOFT SULFURIC ANODIZE FINISH. .00 [0.0] PIN END 2 NOTES: .005 A 1 4 5 6 7 8 www.wallindustries.com 1 +Vin Ø.040 [1.02] 2 ON/OFF Ø.040 [1.02] 3 -Vin Ø.040 [1.02] 4 +Vout Ø.062 [1.57] 5 +SENSE Ø.040 [1.02] 6 TRIM Ø.040 [1.02] 7 -SENSE Ø.040 [1.02] 8 -Vout Ø.062 [1.57] Page 3 of 11 WALL INDUSTRIES, INC. Rev. D TECHNICAL DATASHEET MPQ24S5-50C DESIGN CONSIDERATIONS Under Voltage Lock Out (UVLO) The converter output is disabled until the input voltage exceeds the UVLO turn-on limit. The converter will remain ON until the input voltage falls below the UVLO turn-off limit. Over Current Protection The converter is protected from short circuit and over current conditions. Upon sensing an over current, the output will begin to drop (or ‘foldback’) limiting the output power. Further increasing the output current will cause the converter to shut off and then restart (or ‘hiccup’) until the overcurrent condition is removed. Shorting the output will cause the converter to immediately enter the ‘hiccup’ mode. Over Temperature Protection The converter is protected from over temperature conditions. Upon exceeding this temperature, the converter will shut down. The converter will automatically recover once the over tempature condition is removed. Input Filter No additional input capacitor is needed for the power supply to operate. However, due to the low voltage, high input current nature of the power supply, it is highly recommended that a minimum 100 uF/50 V electrolytic type input bulk capacitor be added to reduce input ripple voltage and current. Refer to Photos 1 and 2 for an example. For an even further reduction of input ripple, an inductor may be placed between the source and the previously mentioned capacitor. Additionally, a 1-10 uF ceramic capacitor may be added in front of the inductor to form pi-filter. No inductor should be placed between the capacitor and the input to the converter. Output Filter No additional output capacitor is needed for the power supply to operate. However, to reduce the ripple and noise on the output, additional capacitance may be added. Usually, a ceramic capacitor between 1 and 100 uF works best for reducing ripple and spike noise. Also, capacitance in the form of a low-esr, surge robust tantalum capacitor (ie: Kemet T495 Series) may also be placed across the output in order reduce ripple, and improve the transient peak-to-peak voltage deviation (see Photos 7 to 11). Due to the low-esr nature of the output of the power supply, adding typical aluminum electrolytic capacitors to the output will not help much in reducing ripple or transient deviations, unless the load is some distance from the power supply output. Then, these capacitors should be placed at the load. Remote Sense To improve regulation at the load, route the connections from the -Sense and the +Sense pins to the –Vout and +Vout connections at the load. This will force the converter to regulate the voltage at the load and not at the pins of the converter. If it is not desired to use the Remotes Sense feature, the –Sense and +Sense pins should be shorted to the -Vout and +Vout pins respectively. However, no damage to the converter will occur if the Sense pins are left open. Fusing It is required that the input to the converter be supplied with a maximum 10 A, 250 V rated fuse UL Listed or R/C fuse. Safety The MPQ24 series is designed to meet EN60950 Safety of Information Technology Equipment. The isolation provided by the MPQ24 series is a Basic insulation in accordance with EN60950. SELV output reliability is maintained only if the input to the converter is a SELV source. To maintain SELV reliability, if either +Vin or –Vin is connected to chassis, either +Vout or –Vout must also be connected to chassis. Otherwise, both the input and the output must not be connected to chassis. PCB Layout Considerations Due to the Basic isolation provided by the converter, caution must be observed in routing traces more than 2 mm inward of any input or output pins on the top layer of the pcb board underneath the converter. Also, due to noise coupling and isolation requirements, no power or ground planes or any signal traces should be routed on the top layer of the pcb underneath the converter. Due to comon noise coupling, input or output power and ground planes should not be poured across the input to output on any layers underneath the converter. Instead, it is best to provide separate input and output power and ground traces on the bottom or an inner layer with a miminum of 1 mm separation between traces on the same layer. Lastly, as the case/heatsink is floating metal, caution must also be observed to provide appropriate spacing (minimum 1.4 mm for Pollution degree 2 Material Group IIIa + IIIb) around the case/heatsink or risk reducing the input to output spacing and violating Basic insulation requirements. (888) 597-WALL www.wallindustries.com Page 4 of 11 WALL INDUSTRIES, INC. Rev. D TECHNICAL DATASHEET MPQ24S5-50C Remote ON/OFF This converter has the ability to be remotely turned ON or OFF. The series may be ordered Active-High or Active-Low (place an option ‘R’ at the end of the part number). Active-High means that a logic high at the ENABLE pin will turn ON the supply (Figure 2). With Active-High, if the ENABLE pin is left floating, the supply will be enabled. Active-Low means that a logic low at the ENABLE pin will turn ON the supply (Figure 3). With Active-Low, if the ENABLE pin is left floating, the supply will be disabled. If remote On/Off is not used on an Active-Low supply, short the Enable pin to –Vin. Output Voltage Trim The output is adjustable from +/–10% of the output voltage. To adjust the output voltage low, place a resistor between the TRIM and SENSE pins (Figure 4). To adjust the output voltage high, place a resistor between the +SENSE and TRIM pins (Figure 5). The value of the TRIM resistor with respect to the desired output voltage can be found in Table 2 or derived from the following equations: RTrim Low 5.11 Vonom % 100 511 5.11 (in k) 2.5 % % Vo / Vonom where Δ% Percent Trim 100 Vo / 511 5.11 (in k) % RTrim High Table 2: Trim Resistor Values (in kΩ) Percent Trim 1% 2% 3% 4% 5% 6% 7% 8% 9% 10% TRIM Low Vout RLow 4.950 500.78 4.900 245.28 4.850 160.11 4.800 117.53 4.750 91.98 4.700 74.95 4.650 62.78 4.600 53.66 4.550 46.56 4.500 40.88 (888) 597-WALL TRIM High Vout RHigh 5.050 511.00 5.100 255.50 5.150 170.33 5.200 127.75 5.250 102.20 5.300 85.17 5.350 73.00 5.400 63.88 5.450 56.78 5.500 51.10 Note 2: While decreasing the output voltage, the maximum output current remains the same, and while increasing the output voltage, the output current is reduced to maintain the total output power at 50 W. www.wallindustries.com Page 5 of 11 WALL INDUSTRIES, INC. TECHNICAL DATASHEET Rev. D MPQ24S5-50C Graph 1: MPQ24S5-50C Efficiency vs. Output Current 92% 90% Effiency (%) 88% 86% 84% Vin=12V Vin=20V Vin=28V Vin=36V 82% 80% 78% 2 3 4 5 6 7 8 9 10 Io (A) Graph 2: MPQ24S5-50C Max Ambient vs. Io 12.0 10.0 Io (A) 8.0 200LFM 100LFM No Air 6.0 4.0 2.0 0.0 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 Ambient (°C) Note 3: When trimming output high, Io vs. Ambient is derated by power. ie: from Graph 2, find the maximum current at the desired ambient and airflow, and multiply this current by the nominal voltage to get the maximum power. Divide this power by the desired trimmed high voltage to get the maximum current at that ambient. When trimming low, the maximum current stays the same as shown in Graph 2. (888) 597-WALL www.wallindustries.com Page 6 of 11 WALL INDUSTRIES, INC. Rev. D Graph 3: MPQ24S5-50C Input Current vs. Input Voltage MPQ24S5-50C Graph 4: MPQ24S5-50C Power Dissipation vs. Input Voltage 10 5.0 Io=0A Io=2A Io=4A Io=6A Io=8A Io=10A Io=0A Io=2A Io=4A Io=6A Io=8A Io=10A 8 Pdissipation (W) 4.0 Iin (A) 3.0 2.0 6 4 2 1.0 0 0.0 12 16 20 24 Vin(V) 28 32 12 36 16 20 24 28 32 36 Vin(V) Graph 5: MPQ24S5-50C No Load Input Current and Power Dissipation vs. Input Voltage 0.150 Graph 6: MPQ24S5-50C "Remote Off" Input Current and Power Dissipation vs. Input Voltage 6.0 3.0 300 Input Current - R Unit Input Current Power Dissipation - R Unit Power Dissipation 5.0 0.100 2.0 4.0 200 0.075 1.5 3.0 150 0.050 1.0 2.0 100 0.5 1.0 50 0.0 0.0 Iin (mA) 2.5 250 Pdissipation (mW) 0.125 Pdissipation (W) Iin (A) TECHNICAL DATASHEET Input Current Power Dissipation 0.025 0.000 12 16 20 24 28 32 36 0 12 16 20 24 28 32 36 Vin(V) Vin(V) Note 4: Voltage measurements taken where the output pins are soldered into test board. (888) 597-WALL www.wallindustries.com Page 7 of 11 WALL INDUSTRIES, INC. Rev. D MPQ24S5-50C Graph 8: MPQ24S5-50C Line Regulation (+SENSE to +Vout, -SENSE to -Vout) 0.05% 0.05% 0.04% 0.04% 0.03% 0.03% 0.02% 0.02% Regulation (%) Regulation (%) Graph 7: MPQ24S5-50C Load Regulation (+SENSE to +Vout, -SENSE to -Vout) 0.01% 0.00% -0.01% -0.02% 0.01% 0.00% Io=0A Io=2A Io=4A Io=6A Io=8A Io=10A -0.01% -0.02% Vin=12V Vin=20V Vin=28V Vin=36V -0.03% TECHNICAL DATASHEET -0.03% -0.04% -0.04% -0.05% -0.05% 0 2 4 6 8 10 Io (A) 12 16 20 24 28 32 Vin (V) Graph 9: MPQ24S5-50C Output Temperature Drift (+SENSE to +Vout, -SENSE to -Vout) 1.0% 0.8% 0.5% Vout (%) 0.3% 0.0% -0.3% -0.5% -0.8% -1.0% -40 -20 0 20 40 60 80 100 Case Temperature (°C) (888) 597-WALL www.wallindustries.com Page 8 of 11 36 WALL INDUSTRIES, INC. Rev. D TECHNICAL DATASHEET MPQ24S5-50C Photo 1: Input Ripple Voltage and Current Vin=24 V, Iout = 10 A Photo 2: Input Ripple Voltage and Current Vin=24 V, Iout = 10 A With a 120 µF Aluminum Electrolytic across the Input Photo 3: Normal Turn On at 24 V Photo 4: Normal Turn Off at 24 V Photo 5: Turn On by Enable at 24 V Photo 6: Turn Off by Enable at 24 V (888) 597-WALL www.wallindustries.com Page 9 of 11 WALL INDUSTRIES, INC. Rev. D TECHNICAL DATASHEET MPQ24S5-50C Photo 7: Output Ripple and Noise (20 MHz BW) Vin=24 V, Iout = 10 A With a 1 µF Ceramic & a 10 µF Tantalum across the Output Photo 8: Transient Response – 0.25A/µs Vin=24 V, Iout = 2.5 to 7.5 A (25% to 100%) With a 1 µF Ceramic & a 10 µF Tantalum across the Output Photo 9: Output Ripple and Noise (20 MHz BW) Vin=24 V, Iout = 10 A With a 330 µF Tantalum across the Output Photo 10: Transient Response – 0.25A/µs Vin=24 V, Iout = 2.5 to 7.5 A (25% to 100%) With a 330 µF Tantalum across the Output Photo 10: Output Ripple and Noise (20 MHz BW) Vin=24 V, Iout = 10 A With a 100 µF Ceramic across the Output Photo 11: Transient Response – 0.25A/us Vin=24 V, Iout = 2.5 to 7.5 A (25% to 100%) With a 100 µF Ceramic across the Output (888) 597-WALL www.wallindustries.com Page 10 of 11 WALL INDUSTRIES, INC. TECHNICAL DATASHEET Rev. D MPQ24S5-50C Ordering Information: Part Number Example: MPQ 24 S 5 – 50 C R Series Designation Nominal Input Voltage Single Output Nominal Output Voltage Maximum Output Power Cased Housing Options R HS Leave Blank for no Options Active Low Enable Heatsink Company Information: Wall Industries, Inc. has created custom and modified units for over 40 years. Our in-house research and development engineers will provide a solution that exceeds your performance requirements on-time and on budget. Our ISO9001-2000 certification is just one example of our commitment to producing a high quality, well documented product for our customers. Our past projects demonstrate our commitment to you, our customer. Wall Industries, Inc. has a reputation for working closely with its customers to ensure each solution meets or exceeds form, fit and function requirements. We will continue to provide ongoing support for your project above and beyond the design and production phases. Give us a call today to discuss your future projects. Contact Wall Industries for further information: Phone: Toll Free: Fax: E-mail: Web: Address: (888) 597-WALL (603)778-2300 (888)587-9255 (603)778-9797 [email protected] www.wallindustries.com 5 Watson Brook Rd. Exeter, NH 03833 www.wallindustries.com Page 11 of 11