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| FEATURES * -55C to 100C * 4 to 6.5, 9 to 15, or 20 to 32 VDC input * Fully isolated * Output regulated from input side * 100 kHz typical switching frequency * Topology - Push-Pull DC/DC Converter * Up to 75% efficiency * No minimum load * Output capacitor suggested DC/DC CONVERTERS 5, 12, OR 28 VOLT INPUT DCH SERIES 3 WATT MODELS VDC OUTPUT SINGLES 5 12 28 DUALS 12 15 28 Size (max.): 0.975 x 0.800 x 0.350 inches (24.77 x 20.32 x 8.89 mm) See section B8, case A3, for dimensions. Weight: 20 grams typical Screening: Standard or ES. See Section C2 for screening options, see Section A5 for ordering information. DESCRIPTION The DCH SeriesTM offers isolated, unregulated DC/DC converters with up to 3 watts of output power in a low profile (0.350 max.) metal package. Single and dual output models are available with input voltages of 5, 12, or 28 VDC. DCH Series converters operate over a -55C to +100C temperature range. DCH Series converters use a non-saturating core circuit operating at a frequency of approximately 100 kHz, which reduces reflected input ripple and minimizes EMI/RFI problems. For applications requiring MIL-STD-461C, CEO3, reflected input ripple levels, refer to Section B5 or contact your Interpoint representative for matching EMI filters. Figure 1 shows a standard connection scheme for a dual output model. Users may also elect to use a dual output device to provide a single output at double the rated output voltage. The double voltage connection is achieved by leaving the normal output common pin (Pin 15) unconnected and using either the positive or negative Vout pin for the output common connection. On all DCH Series models, a tantalum capacitor with a minimum value of 22 F and an appropriate voltage rating should be connected between the output common and the output line(s) to minimize output ripple. FIGURE 1: DUAL DCH CONVERTER WITH EXTERNAL CAPACITORS Positive Input 28 V Positive Output Output Common + + Load Load Input Common Negative Output Typical Performance Curves: 25C Tc ,nominal Vin Efficiency DCH2805S Output Current vs Output Voltage DCH2805S Efficiency DCH1215D Output Current vs Output Voltage DCH1215D FIGURE 2 FIGURE 3 FIGURE 4 FIGURE 5 B4-31 DCH SERIES 3 WATT DC/DC CONVERTERS TYPICAL CHARACTERISTIC Output Voltage Tolerance (Full Load) * 5 volt output models 0.25 * 12 volt output models 0.4 * 15 volt output models 0.5 * 28 volt output models 0.6 Line Regulation * Output is directly proportional to input voltage. Output Voltage Temperature Coefficient * 0.02%/C maximum Converter Frequency * 100 kHz typical Isolation * 100 megohm minimum at 500 V ABSOLUTE MAXIMUM RATING Output Power * 3 watts Lead Soldering Temperature (10 sec per lead) * 300C Storage Temperature Range (Case) * -55C to +125C RECOMMENDED OPERATING CONDITION Input Voltage Range (VDC) * 5 volt input models 4.0 to 6.5 * 12 volt input models 9.0 to 15.0 * 28 volt input models 20.0 to 32.0 Case Operating Temperature (Tc) * -55C to +100C full power Electrical Characteristics: 25C Tc, 28 VDC Vin, 100% load, unless otherwise specified. OUTPUT MODEL NUMBER INPUT VOLTAGE OUTPUT VOLTAGE 1 OUTPUT POWER TC = -55C TO +100C MAX W MIN % EFFICIENCY FULL LOAD LOAD REGULATION 50% TO FULL LOAD TYP mV INPUT CURRENT2 10% LOAD MAX mA 220 250 250 250 110 70 110 110 110 110 50 50 50 50 MAX mVp-p 300 200 100 100 300 200 300 100 100 200 300 200 100 100 OUTPUT RIPPLE2 CURRENT TC = -55C TO +100C NOMINAL VDC NOMINAL VDC MAX mA DCH0505S 5 5 400 2.0 67 470 DCH0512S 5 12 208 2.5 72 830 DCH0512D 5 12 104 2.5 72 830 DCH0515D 5 15 83 2.5 72 830 DCH1205S 12 5 500 2.5 70 500 DCH1212S 12 12 250 3.0 72 440 DCH1228S 12 28 107 3.0 75 870 DCH1212D 12 12 125 3.0 72 440 DCH1215D 12 15 100 3.0 72 440 DCH1228D 12 28 53 3.0 75 870 DCH2805S 28 5 500 2.5 68 450 DCH2812S 28 12 250 3.0 75 375 DCH2812D 28 12 125 3.0 75 375 DCH2815D 28 15 100 3.0 75 375 Notes 1. Nominal output voltage is correct only for nominal input voltage. Output voltage changes in proportion to input voltage. 2. Output ripple results require the connection of a tantalum capacitor (22 F minimum) across each output. PIN OUT Pin 1 2 3 8 9 14 15 16 Designation Positive Input No Connection Input Common No Connection Case 1 Negative Output Output Common1 Positive Output Dot on top of cover indicates pin one. MODEL NUMBERING KEY DCH Base Model 28 12 D / ES 123 8 BOTTOM VIEW DCH 16 15 14 9 Input Voltage Output Voltage Number of Outputs (S = single, D = dual) Screening (Standard screening has no designator in this position.) Note 1. Pins 14 and 15 are connected internally on single output models. See Section B8, case A3, for dimensions FIGURE 6: PIN OUT B4-32 24600-001-DTS Rev A DQ# 1024 All technical information is believed to be accurate, but no responsibility is assumed for errors or omissions. Interpoint reserves the right to make changes in products or specifications without notice. DCH Series is a trademark of Interpoint. Copyright (c) 1991 - 1999 Interpoint. All rights reserved. CASE A Dot on top of case indicates pin one. CASES BOTTOM VIEW CASE A1 FMSA EMI Filter: Screening - Standard, ES, or 883 STF EMI Filter: Screening - Space Standard, H, or K Seam Seal Projection Weld 0.697 (17.70 0.397 (10.08) CASE A BOTTOM VIEW 0.800 max See Figures 2 - 4 (20.32) for pin configurations. Squared corner and dot on top of case indicate pin one. 1 8 23 4 0.975 max (24.77) Materials Header Kovar/Nickel/Gold (Case A3, Kovar/Nickel) Cover Kovar/Nickel Pins Kovar/Nickel/Gold, matched glass seal Case dimensions in inches (mm) Tolerance 0.005 (0.13) for three decimal places 0.01 (0.3) for two decimal places unless otherwise specified CAUTION Heat from reflow or wave soldering may damage the device. Solder pins individually with heat application not exceeding 300C for 10 seconds per pin. 0.270 max (6.98) 0.000 0.27 0.02 (6.9 0.5) 0.097 (2.46) 0.000 0.270 max (6.86) 0.27 0.02 (6.9 0.5) 0.000 0.000 7 65 0.135 (3.43) FIGURE 2: CASE A1 0.018 0.002 dia. (0.46 0.05) BOTTOM VIEW CASE A2 MCH Series: Screening - Standard, ES, or 883 SLH Series: Screening - Space Standard, H, or K Seam Seal Projection Weld 0.697 (17.70 0.018 0.002 dia. (0.46 0.05) 0.097 (2.46) 0.000 0.27 0.02 (6.9 0.5) 0.270 max (6.98) 0.000 0.000 0.270 max (6.86) 0.000 0.27 0.02 (6.9 0.5) 7 6 5 Squared corner and dot on top of case indicate pin one. 12 3 4 FIGURE 1: CASE A MAXIMUM DIMENSIONS 0.135 (3.43) 0.235 (5.97) FIGURE 3: CASE A2 BOTTOM VIEW CASE A3 DCH Series: Screening - Standard or ES Seam Seal Projection Weld 0.697 (17.70 0.018 0.002 dia. (0.46 0.05) 0.097 (2.46) 0.000 0.000 0.350 max (8.89) 0.27 0.02 (6.9 0.5) 0.350 max (8.89) 0.000 0.27 0.02 (6.9 0.5) 0.000 16 15 14 9 Dot on top of case indicates pin one. 123 8 0.135 (3.43) 0.235 (5.97) 0.335 (8.51) 0.435 (11.05) 0.535 (13.59) Note: Although every effort has been made to render the case drawings at actual size, variations in the printing process may cause some distortion. Please refer to the numerical dimensions for accuracy. FIGURE 4: CASE A3 B8-6 0.835 (21.21) 0.835 (21.21) 0.735 (18.67) 0.835 (21.21) QA SCREENING 85C PRODUCTS 85C PRODUCTS TEST (85C Products excluding HR products) PRE-CAP INSPECTION Method 2017 TEMPERATURE CYCLE (10 times) Method 1010, Cond. B, -55C to 125C CONSTANT ACCELERATION Method 2001, 500 g BURN-IN 96 hours at 70C ambient (typical) FINAL ELECTRICAL TEST MIL-PRF-38534, Group A Subgroups 1 and 4: +25C case HERMETICITY TESTING Fine Leak, Method 1014, Cond. A Gross Leak, Method 1014, Cond. C Gross Leak, Dip (1 x 10-3) FINAL VISUAL INSPECTION Method 2009 yes yes no no yes yes yes no yes yes no yes no yes no yes yes yes STANDARD /ES Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534. Applies to the following products: MFW Series MTW Series MHE/MLP Series MHL Series MRH Series MTO Series MSR Series DCH Series FM/FMA/FMB EMI Filters MSF EMI Filter C2-12 |
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