MFA420 Series • Screw Terminals Available • U Channel & Cover Fan Formats • High Power Density 13.3 W/in3 • 5 V Standby & 12 V Fan Outputs • Active Current Share • Remote On/Off • AC & DC OK Signals • -10 ºC to +70 ºC Operation • Level B Conducted Emissions The MFA420 has been designed with multiple mechanical options to facilitate its integration into a wide range of applications. Designers of these systems demand higher power from AC-DC units in industry-standard formats as processing power and functionality grows within tight space constraints. The MFA420 delivers over 420 W across the full universal AC input range from an industry-standard 3.2 x 6.8 inch (81.3 x 172.7 mm) footprint. It is 1.5 inches (38.1 mm) high and achieves 13.3 Watts per cubic inch power density without compromising performance or functionality. With efficiency up to 88% at full load, the MFA420 operates up to 50 °C ambient and up to 70 °C ambient with derating. The main output is 12, 24 or 48 VDC but each power supply also has a 5 V, 0.3 A standby output and a 12 V, 1A output for powering fans. The unit incorporates a fully featured signal set including AC OK/DC OK, remote on/off and active current sharing. xppower.com Models and Ratings Output Voltage V1 Maximum Output Current Fan Output V2 (2) Standby Supply V3 Max Power 13 CFM Airflow Model Number 12.0 VDC 35.0 A 12 V/1 A 5 V/0.3 A 434 W MFA420PS12 24.0 VDC 17.5 A 12 V/1 A 5 V/0.3 A 434 W MFA420PS24 48.0 VDC 8.8 A 12 V/1 A 5 V/0.3 A 436 W MFA420PS48 (1) Notes 1. Units supplied with Molex connections for J1 & J2 as standard. Add suffix ‘-S’ to model number to replace with screw terminals. Add suffix ‘-TF’ for covered version with top fan and suffix ‘-EF’ for covered version with end fan. Example:- MFA420PS12-STF, 12 V unit fitted with screw terminals and top fan. 2. Not available for -TF & -EF versions. Input Characteristics Characteristic Minimum Input Voltage - Operating 85 Input Frequency 47 Typical 50/60 Power Factor >0.9 Input Current - No Load 100 Input Current - Full Load 3.6/1.8 Inrush Current Units Notes & Conditions 264 VAC Derate output power 10% < 90 VAC 63 Hz EN61000-3-2 class A EN61000-3-2 class D mA 60 Earth Leakage Current Input Protection Maximum 1 A 115/230 VAC A 230 VAC cold start mA 230 VAC/50 Hz T6.3A/250 V internal fuse in line Output Characteristics Characteristic Output Voltage - V1 Minimum Typical 12 Initial Set Accuracy Output Voltage Adjustment Minimum Load Units Notes & Conditions 48 VDC See Models and Ratings table ±1 (V1) , ±5 (V2) & ±3 (V3) % ±10 % 0 Start Up Delay Hold Up Time Maximum No minimum load required 1 16 2 20 s ms 90 VAC full load (see fig. 2 & 3) ±0.2 % After 20 min warm up Line Regulation ±0.5(V1) , ±3 (V2) & ±3 (V3) % Load Regulation ±1 (V1) , ±5 (V2) & ±3 (V3) % 0-100% load. V2 10-100% load % Recovery within 1% in less than 500 μs for a 50-75% and 75-50% load step Drift Transient Response - V1 4 Over/Undershoot - V1 Ripple & Noise 1 % 1 (V1 & V3) & 2 (V2) % pk-pk Overvoltage Protection 115 140 % Overload Protection 110 140 % I nom Short Circuit Protection Overtemperature Protection (see fig. 4) 20 MHz bandwidth (see fig. 6 & 7) Vnom DC. Output 1 only, recycle input to reset Output 1 only, auto reset (see fig. 5) Continuous Temperature Coefficient 2 90 VAC full load (see fig. 1) 0.05 75 %/˚C °C Thermal sensor under PCB xppower.com Start Up Delay From AC Turn On AC Figure 1 Example of start up all outputs (taken from MFA350PS12) V1 V2 V3 Hold Up Time From Loss of AC AC Figure 2 V1 hold up at full load with 90 VAC input (26.8 ms) (taken from MFA350PS12) V1 AC V1 Figure 3 Full load 90 VAC input (taken from MFA350PS12) V2 V3 3 xppower.com Output Overshoot Figure 4 Typical Output Overshoot (MFA420PS12) Output Overload Characteristic MFA420PS12 - OCP Chart 14 Figure 5 Typical output overload (MFA420PS12) Output Voltage (V) 12 10 8 6 Unit enters hiccup mode 4 2 0 0 10 20 30 Output Current (A) 4 40 50 xppower.com Output Ripple & Noise Figure 6 V1 MFA420PS12 (full load) 45 mV pk-pk ripple. 20 MHz BW Figure 7 V1 MFA420PS48 (full load) 194 mV pk-pk ripple. 20 MHz BW 5 xppower.com Xxxxxxxxxx General Specifications Characteristic Minimum Typical Efficiency Maximum % 3000 Isolation: Input to Output Input to Ground Output to Ground Notes & Conditions Full load (see fig. 8 & 9) VAC 1500 VAC 100 VDC 78 Switching Frequency: PFC Main Converter kHz 120 kHz Power Density W/in3 11.1 Mean Time Between Failure 420 kHrs Weight Characteristic Units 86 1.35 (612) MIL-HDBK-217F, Notice 2 +25 °C GB lb (g) Notes & Conditions Signals AC OK/Powerfail Open collector referenced to output 0V, transistor normally off when AC is good (see fig. 10, 16, 17 & 18) AC OK: Provides ≥ 5 ms warning of loss of output from AC failure DC OK Open collector referenced to 0 V, transistor normally off when DC is good (see fig. 11, 19 & 20). Provides warning of DC output failure Remote On/Off (Inhibit/Enable) Remotely switches outputs off, can also be configured as enable (see fig.12) Current Share Up to 3 supplies can be connected in parallel. Output current is shared within 10% at full load. Derate overall output current to 90% when used in parallel (see fig.13, 14 & 15) Remote Sense Compensates for 0.5 V total voltage drop Efficiency Versus Load MFA420PS12 - Efficiency against input voltage 88% 86% 84% Efficiency 82% 80% 78% 76% 74% 72% 0 20 40 60 80 100 120 Load (%) Figure 8 MFA420PS12 @ 230 VAC MFA420PS48 - Efficiency against input voltage 90% 88% 86% Efficiency 84% 82% 80% 78% 76% 74% 72% 70% 0 20 40 60 80 Load (%) Figure 9 MFA420PS48 @ 230 VAC 6 100 120 xppower.com Signals AC OK/Power Fail POWER SUPPLY 5 V Standby Pin 9 Max 12 V 20 mA 330R AC OK Collector Pin 1 Figure 10 Transistor On (<0.8 V): AC NOT OK Transistor Off (>4.5 V): AC OK AC OK Emitter Pin 7 5 V Standby Return Pin 10 J3 Logic Connector DC OK POWER SUPPLY 5 V Standby Pin 9 Max 12 V 20 mA 330R DC OK Collector Pin 4 Figure 11 Transistor On (<0.8 V): DC NOT OK Transistor Off (>4.5 V): DC OK DC OK Emitter Pin 7 5 V Standby Return Pin 10 J3 Logic Connector Remote On/Off (Inhibit) See page 12 Mechanical Details for location POWER SUPPLY Internal Vref JP1 Figure 12 Jumper (JP1) fitted (standard) Open or TTL high = PSU On Short circuit or TTL Low = PSU Off Jumper (JP1) removed Open or TTL high = PSU Off Short circuit or TTL Low = PSU On Pin 2 Pin 7 J3 Logic Connector 7 xppower.com Xxxxxxxxxx Signals Parallel Load & Current Share Connections PSU 2 PSU 3 V1 Output V1 Output - + + - Sense Se ns en -S e e + Sens + Figure 13 - + Current Share Current Share se en -S + se Se ns e - PSU 1 V1 Output - + Load Parallel AC OK Connection (DC OK follows same format) POWER SUPPLY 1 5 V Standby Pin 9 330R AC OK Collector Pin 1 AC OK Emitter Pin 7 5 V Standby Return Pin 10 J3 Logic Connector POWER SUPPLY 2 OK Collector Pin 1 Figure 14 OK Emitter Pin 7 J3 Logic Connector POWER SUPPLY 3 AC OK Collector Pin 1 Transistor On (<0.8 V): AC NOT OK Transistor Off (>4.5 V): AC OK AC OK Emitter Pin 7 J3 Logic Connector Parallel Remote On/Off (Inhibit) Connection PSU 1 Figure 15 PSU 2 Pin 2 Pin 2 Pin 2 Pin 7 Pin 7 Pin 7 J3 LOGIC CONNECTORS 8 PSU 3 Jumper (JP1) fitted Open or TTL high = PSU On Short circuit or TTL Low = PSU Off Jumper (JP1) removed Open or TTL high = PSU Off Short circuit or TTL Low = PSU On xppower.com Xxxxxxxxxx Signals AC OK V1 Figure 16 AC OK signal at AC switch on (taken from MFA350PS12) V2 V3 AC OK V1 Figure 17 AC OK signal at AC switch off (taken from MFA350PS12) V2 V3 AC OK Figure 18 V1 warning time at AC OK signal V1 90 VAC full load (taken from MFA350PS12) 9 xppower.com Xxxxxxxxxx Signals DC OK V1 Figure 19 DC OK at AC switch on (taken from MFA350PS12) V2 V3 DC OK V1 Figure 20 DC OK at AC switch off (taken from MFA350PS12) V2 V3 10 xppower.com Xxxxxxxxxx Environmental Characteristic Minimum Typical Maximum Units Operating Temperature -10 +70 °C Storage Temperature -20 +85 °C Cooling 13 Humidity 5 Operating Altitude Notes & Conditions Derate linearly from +50 °C at 2.5%/°C to 50% at 70 °C when forced cooled. See Thermal Considerations. CFM U Channel Version. -TF & -EF models have integral fan. See Thermal Considerations for U Channel. 95 %RH Non-condensing 3000 m Shock 3 x 30 g/11 ms shocks in both +ve & -ve directions along the 3 orthogonal axis, total 18 shocks. Vibration Single axis 10-500 Hz at 2 g x 10 sweeps Electromagnetic Compatibility - Immunity Phenomenon Standard Test Level Criteria Harmonic Current EN61000-3-2 EFT EN61000-4-4 3 A Surges EN61000-4-5 Installation Class 3 A Magnetic Immunity EN61000-4-8 Class 3 A Dips and Interruptions EN61000-4-11 Notes & Conditions Class A Class D 30% 10 ms A 60% 100 ms B 100% 5000 ms B Electromagnetic Compatibility - Emissions Phenomenon Standard Test Level Conducted EN55022 Class B EN55022 Class A Radiated Voltage Fluctuations Criteria Notes & Conditions See fig. 21 EN61000-3-3 Typical EMC Plot Figure 21 Safety Agency Approvals Safety Agency Safety Standard Category CB Report UL US/14622B/UL IEC60950-1:2005 Ed. 2 Information Technology UL UL File #E139109 UL60950-1 (2005) 2nd Edition Information Technology TUV TUV Certificate #B 1101 57396 087 EN60950-1/A11:2009 Information Technology CE LVD 11 xppower.com Mechanical Details U Channel Version A A 8 X M3-0.5 MOUNTING THREAD 0.236 (6.0) MAX SCREW PENETRATION TYP ON ALL SIDES OF POWER SUPPLY Max Torque 4.0-5.0 in-lb (0.045 - 0.057 kg-m) 6.80 (172.7) 2 x 0.60 FAN CONNECTOR V2 BR1 (15.3) LOGIC CONNECTOR A A JP1 (ENABLE) VOLTAGE ADJUST C63 AIRFLOW 3.20 (81.3) 3.20 (81.3) 2 x 2.00 V1(+) (50.8) C8 DC OUTPUT INTERFACE CONNECTOR T3 L3 V1(-) A A D35 AC INPUT INTERFACE CONN 2 x 0.60 2 x 5.80 (147.3) (15.2) 1.50 (38.1) A A 2 x 1.50 (38.1) 2 x 0.75 (19.1) 2 x 0.60 2 x 5.80 (147.3) (15.2) 2 x 6.80 (172.7) Top Fan Version (Suffix TF) AIRFLOW 0.60 (15.20) 5.80 (147.30) 0.66 (16.80) Logic Connector Voltage Adjust 2.00 (50.80) 3.32 (84.50) V1(+) 3.32 (84.50) V1(-) 4 x M3-0.5 Mounting Thread 0.236 (6.0) Max Screw Penetration bottom side of power supply. Max Torque 4.5-5.0 in-lb (0.045-0.057 kg-m) 2.00 (50.79) 6.80 (172.72) AC Input Interface connector 2.00 (50.79) Notes 1. All dimensions in inches (mm). 2. Tolerance: X.XX = ±0.02 (±0.50), X.XXX = ±0.01 (±0.25) 12 Output Interface Connector 0.80 (2.02) xppower.com Mechanical Details End Fan Version (Suffix EF) 8.28 (210.31) 1.75 (44.45) 8.20 (208.28) 0.08 (2.03) 7.20 (182.88) 5.80 (147.32) 0.60 (15.20) 4.00 (10.16) 0.66 (16.84) Logic Connector 3.32 (84.48) 3.32 (84.47) Voltage Adjust 1.37 (34.92) AIRFLOW 2.00 (50.80) V1(+) V1(-) AC Input Interface Connector 1.75 (44.45) Output Interface Connector 5 x M3-0.5 Mounting Thread 0.236 (6.0) Max Screw Penetration bottom side of power supply. Max Torque 4.5-5.0 in-lb (0.045-0.057 kg-m) 1.75 (44.45) 6.80 (172.70) 8.20 (208.28) Notes 1. All dimensions in inches (mm). 2. Tolerance: X.XX = ±0.02 (±0.50), X.XXX = ±0.01 (±0.25) Mechanical Details - Pin Connections PIN CONNECTIONS AC INPUT J1 Molex 26-60-4050 1 GND 3 Neutral 5 Line Mating Parts: Molex 09-50-3051 or Housing 43061-0005 Contact 08-70-1030 Option ‘-S’ screw terminals Phoenix Contact: MKDS 1/5-3.81 or similar accepts 26-16 AWG wire (contacts 2 & 4 removed) Max Torque 1.73 in-lb (0.02 kg-m) PIN CONNECTIONS DC OUTPUT J2 Molex 26-60-4100 1 +V1 2 +V1 3 +V1 4 +V1 5 +V1 6 -V1 7 -V1 8 -V1 9 -V1 10 -V1 Mating Parts: Molex 09-50-3101 or Housing 43061-0010 Contact 08-70-1030 PIN CONNECTIONS LOGIC CONNECTOR J3 JST B10B-PHDSS (LF) (SN) 1 AC OK 2 ROF (Inhibit/Enable) 3 Current Share 4 DC OK 5 Not used 6 +Sense 7 -Sense 8 Not Used 9 5 V Standby V3 10 5 V Standby Return V3 PIN CONNECTIONS FAN OUTPUT J4 Molex 22-04-1021 1 -V2 2 +V2 Mating Parts: Molex Housing 22-01-1024 Contact 08-70-0057 Mating Parts: JST Housing PHDR-10VS Contact SPHD-001T-P0.5 Option ‘-S’ screw terminals 2 x Phoenix Contact: MKDS 1/5-3.81 or similar accepts 26-16 AWG wire Max Torque 1.73 in-lb (0.02 kg-m) 13 xppower.com Thermal Considerations (U Channel) In order to ensure correct and reliable operation of the PSU in the most adverse conditions permitted in the end-use equipment, the temperature of the components listed in the table below must not be exceeded. See drawing on page 12 for component locations. Temperature should be monitored using K type thermocouples placed on the hottest part of the component (out of any direct air flow). Temperature Measurements (Ambient ≤ 50 ºC) Component T3 Max Temperature ºC 90 °C BR1 105 °C D35 85 °C L3 90 °C 14 09-May-12