NMT Series www.murata-ps.com Triple Output 3W DC/DC Converters SELECTION GUIDE 1 2 Output Current Output Current Nominal Nominal 3 Input Output MTTF Order Code Min. Load Full Load Min. Load Full Load Output Voltage Voltage V V mA mA mA mA kHrs -VOUT1 -24 1.4 42 4.2 126 NMT0572SC 5 -VOUT2 -48 0.7 21 2.1 63 145 -VOUT3 -72 0.5 14 1.4 42 -VOUT1 -24 1.4 42 4.2 126 NMT1272SC 12 -VOUT2 -48 0.7 21 2.1 63 145 -VOUT3 -72 0.5 14 1.4 42 When operated with additional external load capacitance the rise time of the input voltage will determine the maximum external FEATURES capacitance value for guaranteed start up. The slower the rise time of the input voltage the greater the maximum value of the additional external capacitance for reliable start up. RoHS compliant Triple outputs (-24V, -48V & -72V) INPUT CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Input/output isolation 1kVDC NMT0572SC 4.5 5.0 5.5 Voltage range V Power sharing on outputs NMT1272SC 10.8 12 13.2 NMT0572SC 85 Industrial temperature range Ripple current (IRIPPLE) mA NMT1272SC 66 UL 94V-0 package material Zero load input current NMT0572SC, 0% output load 50 80 mA Internal SMD construction (ICCZL) NMT1272SC, 0% output load 27.5 50 Toroidal magnetics OUTPUT CHARACTERISTICS No external components required Parameter Conditions Min. Typ. Max. Units 3 Total Rated Power (POUT) Total of all outputs or any single output 0.1 3.0 W Power density 1.65W/cm POUT = 100mW 0 10 Single Channel Voltage Set % Point Accuracy POUT = 3W -7.5 2.5 DESCRIPTION POUT = 100mW 24 26.4 The NMT series is a range of DC/DC convert- Output Voltage - VOUT1 POUT = 3W 22.2 24.6 ers offering three output voltages of -24V, -48V POUT = 100mW 48 52.8 and -72V from a single isolated 5V or 12V input Output Voltage - VOUT2 V POUT = 3W 44.4 49.2 voltage. The product is designed for use with POUT = 100mW 72 79.2 telecommunications circuits requiring an on board Output Voltage - VOUT3 POUT = 3W 66.6 73.8 supply for the -72V RING-TIP connection service Line regulation VIN = 90% to 110% of nominal 1.01 1.2 generated from a nominal 5V or 12V DC input % Load regulation POUT = 100mW to 3W 8 15 supply rail. The device also offers battery level Ripple & Noise DC to 20MHz single channel (24V) 220 400 mV voltages of -24V and -48V for access control and data pump ICs. The product is packaged in an 8 pin SIP case for minimum PCB footprint. The ISOLATION CHARACTERISTICS rated power may be shared or drawn from any Parameter Conditions Min. Typ. Max. Units one output providing the total output load does not Isolation test voltage Flash tested for 1 second 1000 VDC exceed 3W. NMT0572SC, 1MHz, 1V 65 Isolation Capacitance pF NMT1272SC, 1MHz, 1V 130 Insulation Resistance 1000VDC 1 10 G ABSOLUTE MAXIMUM RATINGS 4 Short-circuit protection 1 second Lead temperature 1.5mm from case for 10 seconds 300C Input Voltage VIN, NMT0572SC 7V Input voltage VIN, NMT1272SC 15V 1. Assuming all 3 channels are equally loaded. 2. Assuming only 1 channel is loaded. 3. Calculated using MIL-HDBK-217F with nominal input voltage at full load. For full details go to 4. Supply voltage must be disconnected at the end of the short circuit duration. www.murata-ps.com/rohs All specications typical at TA=25C, nominal input voltage and rated output current unless otherwise specied. www.murata-ps.com/support KDC NMT.E04 Page 1 of 4NMT Series Triple Output 3W DC/DC Converters GENERAL CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Efciency All channels or any single channel 75 85 % Switching frequency 85 kHz TEMPERATURE CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Operating temperature -40 85 Storage -50 125 C Case temperature rise above 1 litre static air chamber 27 ambient OUTPUT VOLTAGE CONFIGURATION Although the output is described for negative rails, the input and output circuits are iternally isolated hence positive rails can also be generated, or a mixture of positive and negative. The output +VOUT rail reference can be taken from any of the output terminals to give the range of outputs as described in the Output Voltage Congura- tions table below. Channel Name Standard Ref Option 1 Option 2 Option 3 +VOUT OV +24V +48V +72V -VOUT1 -24V OV +24V +48V -VOUT2 -48V -24V OV +24V -VOUT3 -72V -48V -24V OV POWER SHARING The 3W total power delivery can be taken from either a single channel, or from any combination of all three channels. This allows an enormous amount of exibility, especially when combined with the selectable output OV reference. For example, using the option 2 output conguration -24V at 0.5W, +24V at 1W and +48V at 1.5W power supplies are available from a single NMT device. PERFORMANCE CHARACTERISTICS NMT0572SC - Channel -VOUT1 (24V NOM) NMT1272SC - Channel -VOUT1 (24V NOM) HF 7 PMUB0VUQVU 7 Z &GmDJFOD HF 7 PMUB70VUQVU Z &GmDJFOD P XFS 8 0VUQVU 1 P XFS 8 0VUQVU 1 P XFS 8 0VUQVU 1 P XFS 8 0VUQVU 1 NMT0572SC - Channel -VOUT2 (48V NOM) NMT1272SC - Channel -VOUT2 (48V NOM) 0VUQVU &GmDJFODZ 7PMUBHF 7 0VUQVU 7PMUBHF 7 Z &GmDJFOD P XFS 0VUQVU 1 8 P XFS 0VUQVU 1 8 P XFS 8 0VUQVU 1 P XFS 8 0VUQVU 1 NMT0572SC - Channel -VOUT3 (72V NOM) NMT1272SC - Channel -VOUT3 (72V NOM) HF 7 0VUQVU 7PMUB &GmDJFODZ HF 7 70VUQVU Z &GmDJFOD PMUB P XFS 8 0VUQVU 1 P XFS 8 0VUQVU 1 P XFS 8 0VUQVU 1 P XFS 8 0VUQVU 1 www.murata-ps.com/support KDC NMT.E04 Page 2 of 4