10 Watt NT Single Series DC/DC Converters Features • Fully Self Contained, No External Parts Required for Operation • Low and Specified Input/Output Capacitance • Efficiencies to 85% • Overcurrent Protected for Long, Reliable Operation • Five-sided, Shielded, Low Thermal Gradient Copper Case • Water Washable Case Design • 5 Year Warranty • RoHS Compliant Selection Chart Input Range Outputs Outputs VDC Model VDC mA Min Max Description 2S3.2000NT 9 8 3.33 2000 These 0 Watt DC/DC converters were designed for fast 2S5.2000NT 9 8 5 2000 integration with your system’s power needs. With no external 2S2.900NT 9 8 2 900 components or filtering necessary for all but the most critical 2S5.700NT 9 8 5 700 applications, these converters can provide power instantly. This saves you costly engineering time required to design your *24S3.2000NT 8 36 3.33 2000 system around the power converter. 24S5.2000NT 8 36 5 2000 24S2.900NT 8 36 2 900 24S5.700NT 8 36 5 700 *48S3.2000NT 36 72 3.33 2000 *48S5.2000NT 36 72 5 2000 *48S2.900NT 36 72 2 900 *48S5.700NT 36 72 5 700 48S5.500NT 36 60 5 500 *Agency Approvals: CSA/UL 60950 **To order add “(RoHS)” to the part number. i.e 24S5.2000NT (RoHS) 10 Watt NT Single Series Block Diagram 240 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-44 Fax: 925-687-3333 www.calex.com Email: sales@calex.com eco# 04007-,090309-, 00426-  10 Watt NT Single Series DC/DC Converters Input Parameters (1) Model 12S3.2000NT 12S5.2000NT 12S12.900NT 12S15.700NT 24S3.2000NT 24S5.2000NT Units MIN 9 8 Voltage Range VDC MAX 8 36 TYP 280 440 40 20 mA P-P Reflected Ripple, (2) TYP 90 45 45 70 mA RMS Input Current Full Load TYP 70 070 00 060 340 500 mA No Load TYP 7 7 2 5 7 7 Efficiency TYP 78 78 82 83 82 83 % Switching Frequency TYP 220 kHz Maximum Input Overvoltage, MAX 24 45 VDC 00 ms Maximum Turn-on Time, % TYP 6 ms Output Error Recommended Fuse (3) AMPS Model 24S12.900NT 24S15.700NT 48S3.2000NT 48S5.2000NT 48S12.900NT 48S15.700NT Units MIN 8 36 Voltage Range VDC MAX 36 72 TYP 20 0 50 mA P-P Reflected Ripple, (2) TYP 70 35 50 mA RMS Input Current Full Load TYP 530 50 70 260 270 260 mA No Load TYP 0 0 6 6 6 6 Efficiency TYP 85 86 80 8 83 84 % Switching Frequency TYP 220 kHz Maximum Input Overvoltage, MAX 45 85 VDC 00 ms Maximum Turn-on Time, % TYP 6 ms Output Error Recommended Fuse (3) AMPS Model 48S5.1500NT Units MIN 20 Voltage Range VDC MAX 60 TYP 30 mA P-P Reflected Ripple, (2) TYP 40 mA RMS Input Current TYP Full Load 200 mA TYP No Load 6 Efficiency TYP 78 % Switching Frequency TYP 220 kHz Maximum Input Overvoltage, MAX 72 VDC 00 ms Maximum Turn-on Time, % TYP 6 ms Output Error Recommended Fuse (3) AMPS () All parameters measured at Tc=25ºC, nominal input voltage (3) To determine the correct fuse size, see CALEX Application Notes. and full rated load unless otherwise noted. Refer to the CALEX (4) The case is tied to the -input pin. Application Notes for the definition of terms, measurement (5) Short term stability is specified after a 30 minute warmup at full load , circuits and other information constant line, and recording the drift over a 24 hour period. (2) Noise is measured per CALEX Application Notes. Measurement (6) The Transient response is specified as the time required to settle from bandwidth is 0-20 MHz for peak-peak measurements, 0 kHz a 50 to 75 % step load change (rise time of step = 2µSec) to a % to  MHz for RMS measurements. Output noise is measured error band. with a 0.0µF / 00V ceramic capacitor in parallel with a µF / (7) Dynamic response is the peak overshoot voltage during the transient 35V Tantalum capacitor,  inch from the output pins to simulate as defined in note 6 above. standard PCB decoupling capacitance. 240 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-44 Fax: 925-687-3333 www.calex.com Email: sales@calex.com eco# 04007-,090309-, 00426- 2 10 Watt NT Single Series DC/DC Converters Output Parameters (1) Model 12S3.2000NT 12S5.2000NT 12S12.900NT 12S15.700NT Units 24S3.2000NT 24S5.2000NT 24S12.900NT 24S15.700NT 48S5.1500NT 48S3.2000NT 48S5.2000NT 48S12.900NT 48S15.700NT Output Voltage 3.33 5 2 5 5 VDC MIN 3.30 4.95 .90 4.90 4.95 Output Voltage Accuracy TYP 3.33 5.00 2.00 5.00 5.00 VDC MAX 3.36 5.05 2.0 5.0 5.05 MIN 0.2 0.0 0.0 0.0 0.0 Rated Load Range A MAX 2.0 2.0 0.9 0.7 .5 Load Regulation TYP 0. 0. 0.2 0.2 0. % 25% Max Load - Max Load MAX 0.4 0.4 0.4 0.4 0.3 Line Regulation TYP 0.5 0.0 0.2 0.2 0.0 % Vin = Min-Max VDC MAX .0 0.2 0.8 0.8 0.2 TYP Short Term Stability (5) <0.05 %/24 Hrs MAX Long Term Stability TYP <0. %/kHrs Transient Response (6) TYP 00 250 250 400 500 µs Dynamic Response (7) TYP 30 90 250 350 25 mV peak Input Ripple Rejection (8) TYP >40 dB Noise, Peak - Peak (2) TYP 00 75 mV P-P RMS Noise TYP 6 5 mV RMS TYP 50 Temperature Coefficient ppm/ºC MAX 50 Short Circuit Protection to Common for all Continuous, Current Limit Protection Outputs (10) The case thermal impedance is specified as the case temperature (8) The input ripple rejection is specified for DC to 120 Hz ripple with rise over ambient per package watt dissipated. a modulation amplitude of % Vin. (11) Specifications subject to change without notice. (9) The functional temperature range is intended to give a additional (2) Water Washability - Calex DC/DC converters are designed data point for use in evaluating this power supply. At the low to withstand most solder/wash processes. Careful attention functional temperature the power supply will function with no should be used when assessing the applicability in your specific side effects, however, sustained operation at the high functional manufacturing process. Converters are not hermetically temperature will reduce expected operational life. The data sheet sealed. specifications are no guaranteed over the functional temperature (3) RoHS Compliance - range. See Calex website www.calex.com/RoHS.html for the complete RoHS compliance statement. General Specifications The RoHS marking is as follows. All Models Units Isolation (4) Isolation Voltage Input-Output 2S, 24S MIN 700 VDC Input-Output 48S MIN 544 0µA Leakage Input to Output TYP 400 pF Capacitance Environmental Case Operating Range MIN -40 ºC No Derating MAX 90 Case Functional Range (9) MIN -50 ºC MAX 00 Storage Range MIN -55 ºC MAX 05 TOLERANCE: ALL DIMENSIONS ARE TYPICAL IN Pin Function Thermal Impedance (0) TYP 5 ºC/Watt INCHES UNLESS OTHERWISE NOTED:  +INPUT General X.XX ±0.020 Unit Weight TYP .0 oz 2 -INPUT X.XXX ±0.005 3 +OUTPUT Mounting Kits MS6, MS8 & MS5 4 CMN 240 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-44 Fax: 925-687-3333 www.calex.com Email: sales@calex.com eco# 04007-,090309-, 00426- 3 10 Watt NT Single Series DC/DC Converters Application Information No external capacitance on the output is required for normal General Information operation. In fact, it can degrade the converter’s performance. See our application note “Understanding DC/DC Converters Output Impedance” and the low noise circuits for more Adequate heat sinking and full filtering on both the input and output are included in he 0 Watt NT Single Series, preventing information. The usual  to 0 µF aluminum or tantalum and the need for additional components and head sinking in most 0. to 0.00 µF bypasses may be used around your PCB as applications. required without harm. Extra transient overvoltage protection may be added directly Full overload protection is provided by independent pulse-by- pulse current limiting. These protection freatures assure you at the converter’s output pins as shown in Figure . that our 0 Watt Single will provide zero failure rate operation. A fully five-sided shielded, sealed, water washable case is � � standard along with specified operation over the full industrial temperature range of -40 to +90 ºC. Applying the Input � � Figure  shows the recommended connections for the 0 Watt NT Single DC/DC converter. A fuse is recommended to protect the input circuit and should not be omitted. The fuse serves an Figure 2. important purpose in preventing unlimited current from flowing For very low noise applications the circuits shown above can be in the case of a catastrophic system failure. See our application used. The input current ripple will be reduced approximately 30 note on input fuse selection for more information. dB of the original value while the output noise will be reduced to below 0 mV P-P. Do not use the biggest ESR capacitors No external capacitance on the input is required for normal that you can find in these circuits. Large capacitors can cause operation in fact, it can degrade the converter’s performance. severe peaking in the filter’s transfer function and may actually If extra filtering is desired on the input, see the low noise input make the conducted noise worse. circuit in Figure 2. Isolation - Case Grounding Extremely low ESR capacitors (<0.25 ohms) should not be used at the input. This will cause peaking of the input filter’s transfer The input and output sections are fully floating from each other. function and actually degrade the filter’s performance. They may be operated fully floating or with a common ground. If the input and output sections are connected either directly If desired, extra transient overvoltage protection may be added at the converter or at some remote location from the converter directly at the converter’s input pins as shown in Figure . it is suggested that a  to 0 µF, 0.5 to 5 ohm ESR capacitor be used directly at the converter output pins. This capacitor prevents any common mode switching currents from showing up at the converter’s output as normal mode output noise. Do not use the lowest ESR, Biggest value capacitor that you can find! This can only lead to reduced system performance or oscillation. The case serves not only as a head sink but also as an EMI shield. The 0.06 inch thick copper provides >25 dB of absorption loss to both electromagnetic and electric fields at 200 kHz, while at the same time providing about 30% more effective heat sinking than competitive 0.0 inch thick steel cases. Figure 1. Standard connections for the 0 Watt NT Single. The input fuse The case shield is tied to the -input pin. This connection is should not be omitted. The overvoltage diodes D and D2 may be shown on the block diagram. The case is floating from output, added to the circuit directly at the converter to provide transient coupled only by the 400 pF of isolation capacitance. This low protection to your circuit. capacitance insures that any AC common mode noise on the inputs is not transferred to your output circuits. Applying the Output Compare this isolation capacitance vale to the 600 to 2000 pF The output is simply connected to your application circuit and found on competitive designs and you’ll see that with CALEX away you go! If extra low output noise is required for your you are getting the best DC and AC isolation available. After application the circuit shown in Figure 2 may be used to reduce all, you are buying an isolated DC/DC converter to cut ground the output noise to below 0 mV P-P. loops. Don’t let the isolation capacitance add them back in. 240 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-44 Fax: 925-687-3333 www.calex.com Email: sales@calex.com eco# 04007-,090309-, 00426- 4 10 Watt NT Single Series DC/DC Converters Temperature Derating The NT Single series can operate up to 90ºC case temperature with derating. Case temperature may be roughly calculated from ambient by knowing that the 0 Watt NT Singles case temperature rise is approximately 0ºC per package watt dissipated. For example: if a 24 Volt input converter was delivering 7 Watts at 24 Volts input, at what ambient could it expect to run with no moving air and no extra sinking. Efficiency for the NT Single is approximately 84%. Check the product curves for exact information. This leads to an input power of about 8.3 Watts. There fore, the case dissipation is 8.3 Watts (input power) minus 7 Watts (output power) or .3 Watts. The case temperature rise would be .3 Watts x 5 = 20 ºC. This number is subtracted from the maximum case temperature of 90ºC to get 70ºC. This is a rough approximation of the maximum ambient temperature. Because of the difficulty of defining ambient temperature and the possibility that the load’s dissipation may actually increase the local ambient temperature significantly or the convection cooling is suppressed by physical placement of the module, these calculations should be verified by actual measurement of operating temperature and your circuit’s exact efficiency (efficiency depends on both line input and load value before committing to a production design. Typical Performance (Tc=25ºC, Vin=Nom VDC, Rated Load). Data for 12 Volt Input Models 24 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE 12 VOLT EFFICIENCY Vs. LOAD 12 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE 0.8 85 85 50% FULL LOAD LINE = 84 9VDC 0.6 80 100% LOAD 83 0.4 75 100% FULL LOAD 82 LINE = 50% LOAD 12VDC 0.2 70 81 LINE = 18VDC 80 0.0 65 9 10 11 12 13 14 15 16 17 18 4 8 12 16 20 24 28 32 36 0 10 20 30 40 50 60 70 80 90 100 LINE INPUT(VOLTS) LINE INPUT (VOLTS) LOAD (%) Data for 24 Volt Input Models 12 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE 24 VOLT EFFICIENCY Vs. LOAD 24 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE 1.5 90 88 85 100% FULL LOAD 86 100% LOAD LINE = 1.0 80 18VDC 84 75 50% LOAD 0.5 70 50% FULL LOAD LINE = 82 24VDC 65 LINE = 36VDC 0.0 60 80 4 6 8 10 12 14 16 18 18 20 22 24 26 28 30 32 34 36 0 10 20 30 40 50 60 70 80 90 100 LINE INPUT (VOLTS) LOAD (%) LINE INPUT(VOLTS) 240 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-44 Fax: 925-687-3333 www.calex.com Email: sales@calex.com eco# 04007-,090309-, 00426- 5 INPUT CURRENT (AMPS) INPUT CURRENT (AMPS) EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY(%) EFFICIENCY(%) 10 Watt NT Single Series DC/DC Converters Typical Performance (Tc=25ºC, Vin=Nom VDC, Rated Load). Data for 48 Volt Input Models 48 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE 48 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE 48 VOLT EFFICIENCY Vs. LOAD 0.4 85 85 80 75 0.3 LINE = 100% FULL LOAD 80 70 36VDC 100% LOAD 65 0.2 60 50% LOAD 50% FULL LOAD 75 55 LINE = 0.1 48VDC 50 LINE = 45 72VDC 70 0.0 40 5 15 25 35 45 55 65 75 35 40 45 50 55 60 65 70 75 0 10 20 30 40 50 60 70 80 90 100 LINE INPUT (VOLTS) LINE INPUT(VOLTS) LOAD (%) Data for 48S5.1500NT Only EFFICIENCY Vs. LOAD INPUT CURRENT Vs. LINE INPUT VOLTAGE 48 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE 85 0.6 85 100% FULL LOAD LINE = 20VDC 80 80 0.5 75 75 0.4 LINE = 48VDC 70 50% FULL LOAD 70 0.3 65 65 100% LOAD 60 0.2 60 50% LOAD 55 0.1 55 50 LINE = 60VDC 0.0 50 45 0 10 20 30 40 50 60 20 25 30 35 40 45 50 55 60 0 10 20 30 40 50 60 70 80 90 100 LINE INPUT (VOLTS) LINE INPUT(VOLTS) LOAD (%) Data For All Models OUTPUT VOLTAGE Vs. CASE TEMPERATURE OUTPUT VOLTAGE Vs. OUTPUT LOAD OUTPUT IMPEDANCE Vs. FREQUENCY 0.2 120 10 0.1 100 12 AND 15 VOLT 1 0.0 80 CURRENT LIMIT MODE -> -0.1 60 .1 -0.2 40 3.3 AND 5 VOLT .01 -0.3 20 "HICKUP" MODE -> -0.4 0 .001 -40 -20 0 20 40 60 80 100 0 20 40 60 80 100 120 140 160 180 200 10 100 1000 10000 100000 1000000 CASE TEMPERATURE (Deg C) OUTPUT LOAD (%) FREQUENCY (Hz) DERATING 120 INFINITE HEAT SINK 100 80 NO HEAT SINK → 60 ↑ ← SAFE OPERATING AREA → 40 ↓ 20 0 -40 -20 0 20 40 60 80 100 120 AMBIENT TEMPERATURE (Deg C) NOTES ON USING THE CURVES (2) The efficiency curves were generated for 12 Volt output models. These notes apply to all curves except the 48S5.500NT curves. To use for other outputs adjust as follows: () The input current curves are for 0.8 Watts of output power. For 3.33 Volt output.............Subtract approximately 3% 3.3 Volt output models the input current is approximately 35% 5.0 Volt output...............Subtract approximately 2% less. 5.0 Volt output.............Add Approximately % 240 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-44 Fax: 925-687-3333 www.calex.com Email: sales@calex.com eco# 04007-,090309-, 00426- 6 NORMALIZED OUTPUT (%) INPUT CURRENT (AMPS) INPUT CURRENT (AMPS) OUTPUT POWER (%) EFFICIENCY (%) EFFICIENCY (%) NORMALIZED OUTPUT (%) EFFICIENCY(%) EFFICIENCY(%) OUTPUT IMPEDANCE (OHMS)