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| NMT SERIES Triple Output 3W DC-DC Converters SELECTION GUIDE Nominal Input Voltage Output Rated Output Voltage Output Current 2 MIN Full Load Load Output Current3 MIN Full Load Load MTTF1 Order Code (V) VO1 V -24 -48 -72 -24 -48 -72 (mA) 1.4 0.7 0.5 1.4 0.7 0.5 (mA) 42 21 14 42 21 14 (mA) 4.2 2.1 1.4 4.2 2.1 1.4 (mA) 126 63 42 126 63 42 kHrs NMT0572S 5 VO2 VO3 VO1 145 NMT1272S 12 VO2 VO3 145 FEATURES s Triple Outputs (-24V, -48V & -72V) s Toroidal Magnetics s Input/Output Isolation 1kVDC s Power Sharing on Outputs s Internal SMD Construction s Industrial Temperature Range s No External Components Required s Power Density 1.41W/cm 3 s UL 94V-0 Package Material DESCRIPTION The NMT series is a range of DC-DC converters offering three output voltages of -24V, -48V and -72V from a single isolated 5V or 12V input voltage. The product is designed for use with telecommunications circuits requiring an on board supply for the -72V RING-TIP connection service generated from a nominal 5V or 12V DC input supply rail. The device also offers battery level voltages of -24V and -48V for access control and data pump IC's. The product is packaged in an 8 pin SIP case for minimum PCB footprint. The rated power may be shared or drawn from any one output providing the total output load does not exceed 3W. When operated with additional external load capacitance the rise time of the input voltage will determine the maximum external 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. INPUT CHARACTERISTICS Parameter Conditions MIN TYP MAX Units NMT0572S NMT1272S Ripple Current NMT0572S (IRIPPLE) NMT1272S Zero Load Input NMT0572S, 0% output load Current (ICCZL) NMT1272S, 0% output load Voltage Range (VIN ) 4.5 10.8 5.0 12 85 66 50 27.5 5.5 13.2 V mA 80 50 mA OUTPUT CHARACTERISTICS Parameter Conditions MIN TYP MAX Units Total Rated Power (P OUT) Single Channel Voltage Setpoint Accuracy Output Voltage - VO1 (V OUT) Output Voltage - VO2 (V OUT) Output Voltage - VO3 (V OUT) Line Regulation Load Regulation Ripple & Noise Total of all outputs or any single output POUT = 100mW POUT = 3W POUT = 100mW POUT = 3W POUT = 100mW POUT = 3W POUT = 100mW POUT = 3W VIN = 90% to 110% of nominal POUT = 100mW to 3W DC to 20MHz single channel (24V) 0.1 0 -7.5 24.0 22.2 48.0 44.4 72.0 66.6 1.01 8 0 220 3.0 10 2.5 26.4 24.6 52.8 49.2 79.2 73.8 1.2 15 400 W % V V V % % mV ABSOLUTE MAXIMUM RATINGS Short-circuit duration 4 Lead temperature 1.5mm from case for 10 seconds Input voltage V IN , NMT0572S Input voltage V IN , NMT1272S 1 second 300C 7V 15V ISOLATION CHARACTERISTICS Parameter Conditions MIN TYP MAX Units Isolation Voltage (VISOL) Isolation Capacitance (C ISOL) Insulation Resistance Flash tested for 1 second NMT0572S, 1MHz, 1V NMT1272S, 1MHz, 1V 1000VDC test 1000 65 130 10 VDC pF G 1 GENERAL CHARACTERISTICS Parameter Conditions MIN TYP MAX Units Efficiency All channels or any single channel Switching Frequency (f OSC ) 75 85 85 % kHz www.dc-dc.com 1 Calculated using MIL-HDBK-217F with nominal input voltage at full load. 2 Assuming all 3 channels are equally loaded. 3 Assuming only 1 channel is loaded. 4 Supply voltage must be discontinued at the end of the short circuit duration. All specifications typical at TA=25C, nominal input voltage and rated output current unless otherwise specified. NMT SERIES Triple Output 3W DC-DC Converters TEMPERATURE CHARACTERISTICS Parameter Conditions MIN TYP MAX Units PIN CONNECTIONS -40 -50 85 125 27 C C C PIN 1 VIN 2 GND 5 0V 6 V01 7 V02 8 V03 Operating Temperature (TA ) Storage Case Temperature Rise Above Ambient 1 litre static air chamber OUTPUT VOLTAGE CONFIGURATION Although the output is described for negative rails, the input and output circuits are internally isolated hence positive rails can also be generated, or a mixture of positive and negative. The output 0V rail reference can be taken from any of the output terminals to give the range of outputs as described in Output Voltage Configurations table below. Channel Name Standard Ref Option 1 Option 2 Option 3 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 flexibility, especially when combined with the selectable output 0V reference. For example, using the option 2 output configuration; -24V at 0.5W, +24V at 1W and +48V at 1.5W power supplies are available from a single NMT device. 0V V01 V02 V03 0V -24V -48V -72V +24V 0V -24V -48V +48V +24V 0V -24V +72V +48V +24V 0V PERFORMANCE CHARACTERISTICS NMT0572S - Channel V01 (24V NOM) 100 80 60 40 20 0 0 0.5 1.0 1.5 2.0 2.5 Output Power (W) 3.0 40 36 32 28 24 20 0 0.5 1.0 1.5 2.0 2.5 Output Power (W) 3.0 100 80 60 40 20 0 0 0.5 1.0 1.5 2.0 2.5 Output Power (W) 3.0 NMT1272S - Channel V01 (24V NOM) 40 36 32 28 24 20 0 0.5 1.0 1.5 2.0 2.5 Output Power (W) 3.0 NMT0572S - Channel V02 (48V NOM) 100 80 60 40 20 0 0 0.5 1.0 1.5 2.0 2.5 Output Power (W) 3.0 80 72 64 56 48 40 0 0.5 1.0 1.5 2.0 2.5 Output Power (W) 3.0 100 80 60 40 20 0 0 0.5 NMT1272S - Channel V02 (48V NOM) 80 72 64 56 48 40 1.0 1.5 2.0 2.5 Output Power (W) 3.0 0 0.5 1.0 1.5 2.0 2.5 Output Power (W) 3.0 NMT0572S - Channel V03 (72V NOM) 100 80 60 40 20 0 0 0.5 1.0 1.5 2.0 2.5 Output Power (W) 3.0 120 108 96 84 72 60 0 0.5 1.0 1.5 2.0 2.5 Output Power (W) 3.0 100 80 60 40 20 0 0 0.5 NMT1272S - Channel V03 (72V NOM) 120 108 96 84 72 60 1.0 1.5 2.0 2.5 Output Power (W) 3.0 0 0.5 1.0 1.5 2.0 2.5 Output Power (W) 3.0 MECHANICAL DIMENSIONS 7.50 11.10 NMT0572S XYYWW 21.80 1.17 0.30 0.20 2.54 2.10 0.55 0.45 0.55 0.45 Weight: 3.85g 4.60 3.60 12 5 6 7 8 All dimensions in mm XX.XX 0.25mm. All pins on a 2.54mm pitch and within 0.25mm of true position. C&D Technologies (NCL), Inc. 5816 Creedmoor Road, Raleigh NC 27612, USA Tel: +1 (919) 571-9405 Fax: +1 (919) 571-9262 email: info@us.cdtechno-ncl.com C&D Technologies (NCL) Limited reserve the right to alter or improve the specification, internal design or manufacturing process at any time, without notice. Please check with your supplier or visit our web site to ensure that you have the current and complete specification for your product before use. (c) C&D Technologies (NCL) Limited 2001 NDC NMT.3 No part of this publication may be copied, transmitted or stored in a retrieval system or reproduced in any way including, but not limited to, photography, photocopy, magnetic or other recording means, without prior written permission from C&D Technologies (NCL) Limited. Instructions for use are available from www.dc-dc.com C&D Technologies (NCL) Ltd Tanners Drive, Blakelands North Milton Keynes MK14 5BU, England Tel: +44 (0)1908 615232 Fax:+44 (0)1908 617545 email: info@cdtechno-ncl.com www: http://www.dc-dc.com |
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