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| DC/DC CONVERTERS 5 OR 28 VOLT INPUT Features * * * * * * * * * -55C to 100C 5 or 28 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 MODELS VDC OUTPUT SINGLES DCH SERIES 3 WATT NOT RECOMMENDED FOR NEW DESIGNS DUALS 5 12 12 15 Size (max.): Weight: Screening: 0.975 x 0.800 x 0.350 inches (24.77 x 20.32 x 8.89 mm) See case A3 for dimensions. 20 grams typical Standard or ES. See "100C Non-QML Products - Environmental Screening (Standard & ES)" screening table for screening options. 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 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 FIGURE 2 FIGURE 3 1 DC/DC CONVERTERS ABSOLUTE MAXIMUM RATING Output Power * 3 watts Lead Soldering Temperature (10 sec per lead) * 300C Storage Temperature Range (Case) * -55C to +125C DCH SERIES 3 WATT TYPICAL CHARACTERISTICS Output Voltage Tolerance (Full Load) * 5 volt output models 0.25 * 15 volt output models 0.5 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 RECOMMENDED OPERATING CONDITION Input Voltage Range (VDC) * 5 volt input models 4.0 to 6.5 * 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. INPUT VOLTAGE OUTPUT VOLTAGE OUTPUT CURRENT NOMINAL VDC TC = -55C TO +100C MAX OUTPUT CURRENT NOMINAL VDC TC = -55C TO +100C MAX EFFICIENCY FULL LOAD MODEL NUMBER DCH0505S DCH0512S DCH0512D DCH0515D DCH2805S DCH2812S DCH2812D DCH2815D NOMINAL VDC 5 5 5 5 28 28 28 28 NOMINAL VDC 5 12 12 15 5 12 12 15 mA 400 208 104 83 500 250 125 100 W 2.0 2.5 2.5 2.5 2.5 3.0 3.0 3.0 MIN % 67 72 72 72 68 75 75 75 LOAD REGULATION 50% TO FULL LOAD TYP mV 470 830 830 830 450 375 375 375 INPUT CURRENT2 10% LOAD MAX mA 220 250 250 250 50 50 50 50 OUTPUT RIPPLE MAX mV-pp 300 200 100 100 300 200 100 100 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 Negative Output1 Output Common1 Positive Output Dot on top of cover indicates pin one. MODEL NUMBERING KEY DCH 123 8 28 12 D / ES Base Model Input Voltage Output Voltage Number of Outputs (S = single, D = dual) Screening (Standard screening has no designator in this position.) BOTTOM VIEW DCH 16 15 14 9 Note 1. Pins 14 and 15 are connected internally on single output models. See case A3 for dimensions FIGURE 6: PIN OUT 2 DC/DC CONVERTERS DCH SERIES 3 WATT BOTTOM VIEW CASE A3 Seam Seal Projection Weld 0.805 max (20.45) 0.697 (17.70) 0.018 0.002 dia. (0.46 0.05) 0.097 (2.46) 0.000 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) 16 15 14 9 Dot on top of case indicates pin one. 123 8 Seal hole: 0.056 0.002 (1.42 0.05) 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 Materials Header 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. Case A3, Rev C, 20060731 Please refer to the numerical dimensions for accuracy. All 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. Copyright (c) 1999-2006 Interpoint Corp. All rights reserved. FIGURE 7: CASE A3 0.980 max (24.89) 0.135 (3.43) 0.235 (5.97) 0.335 (8.51) 0.835 (21.21) 3 DC/DC CONVERTERS 100C NON-QML PRODUCTS-- ENVIRONMENTAL SCREENING (STANDARD & ES) TEST 100C STANDARD non QML Pre-cap Inspection Method 2017, 2032 Temperature Cycle (10 times) Method 1010, Cond. B, -55C to 125C ambient Constant Acceleration Method 2001, 500 g Burn-In 96 hours, typical case temperature 100C case Final Electrical Test MIL-PRF-38534, Group A Subgroups 1 and 4: +25C case Hermeticity Test Fine Leak, Method 1014, Cond. A Gross Leak, Method 1014, Cond. C Gross Leak, Dip (1 x 10 ) Final Visual Inspection Method 2009 yes yes -3 2 1 DCH SERIES 3 WATT 100C /ES non QML1 yes no no no yes no no yes yes yes yes yes yes yes yes no Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534. Notes: 1. Non-QML products do not meet all of the requirements of MIL-PRF-38534 2. Burn-in is still air with an ambient temperature designed to bring the case temperature to 100C 24600-001-DTS Rev B 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 - 2006 Interpoint. All rights reserved. 4 |
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