DVSB2800D
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DVSB2800D Series HIGH RELIABILITY HYBRID DC-DC CONVERTERS DESCRIPTION The DVSB series of high-reliability DC-DC converters provide decades of successful critical mission support. Operable over the full military (-55 °C to +125 °C) temperature range with no power derating, the DVSB series unique input, and output filters dramatically reduce input and output noise performance. While operating at a nominal fixed frequency of 450 kHz, these regulated, isolated units utilize a high-speed magnetic feedback design and well-controlled under-voltage lockout circuitry to eliminate slow start-up problems. These converters are designed and manufactured in a facility qualified to ISO9001 and certified to MILPRF-38534 and MIL-STD-883. This product may incorporate one or more of the following U.S. patents: 5,784,266 5,790,389 5,963,438 5,999,433 6,005,780 6,084,792 6,118,673 High Reliability Very Low Output Noise Wide Input Voltage Range: 15 to 50 Volts per MIL-STD-704 Up to 12.5 Watts Output Power Fault Tolerant Magnetic Feedback Circuit NO Use of Optoisolators Undervoltage Lockout Indefinite Short Circuit Protection Current Limit Protection High Input Transient Voltage: 80 Volts for 1 sec per MIL-STD-704A Precision Projection Welded Hermetic Package High Power Density Custom Versions Available Additional Environmental Screening Available Meets MIL-STD-461C and MIL-STD-461D EMC Requirements When Used With a DVMH28 EMI Filter Flanged and Non-flanged Versions Available. MIL-PRF-38534 Element Evaluated Components Figure 1 – DVSB2800D / DVSB2800DF DC-DC Converter (Exact marking may differ from that shown) Sales Information: Phone: (425) 353-3010 Fax: (425) 353-40

SPECIFICATIONS (Tcase = -55°C to +125°C, Vin = +28V ± 5%, Full Load, Unless Otherwise Specified) ABSOLUTE MAXIMUM RATINGS

DVSB2800D SeriesSPECIFICATIONS (Tcase = -55°C to +125°C, Vin = +28V ± 5%, Full Load, Unless Otherwise Specified) ABSOLUTE MAXIMUM RATINGS 1. This note intentionally not used. 2. Time for output voltage to settle within 1% of its nominal value. 4. Verified by initial electrical design verification. Post design verification, parameter shall be guaranteed to the limits specified. 5. Synchronization is TTL signal with Vsync max = 6V. 6. Correction factor of 0.12 added to ceramic capacitors.

DVSB2800D Series BLOCK DIAGRAM 28V IN OUT COM PIN 3 PRIMARY HOUSEKEEPING SUPPLY TRANSFORMER ISOLATED ERROR SIGNAL FEEDBACK VOLTAGE ERROR AMPLIFIERS TRANSFORMER ISOLATED POWER FEEDFORWARD SECONDARY HOUSKEEPING SUPPLY

DVSB2800D Series CONNECTION DIAGRAM INHIBIT DRIVE CONNECTION DIAGRAMS BIAS OPTIONAL CAPACITOR IN COM 8 BIAS OPTIONAL CAPACITOR Figure 4 – Internal Inhibit Circuit and Recommended Drive Figure 5 – Isolated Inhibit Drive (Shown with optional capacitor for turn-on delay) (Shown with optional capacitor for turn-on delay)

DVSB2800D Series EMI FILTER HOOKUP DIAGRAM DVMH28 EMI FILTER 1 Figure 6 – Converter with EMI Filter

DVSB2800D Series EFFICIENCY PERFORMANCE CURVES (TCASE = 25°C) VIN = 15V Figure 7 – DVSB2853R3D Efficiency (%) vs. Output Power (W)

DVSB2800D Series EMI PERFORMANCE CURVES (TCASE = 25°C, VIN = +28V ± 5%, Full Load, Unless Otherwise Specified) Figure 9 – DVSB2853R3D without EMI Filter Figure 10 – DVSB2853R3D with EMI Filter

DVSB2800D SeriesPACKAGE SPECIFICATIONS (NON-FLANGED) NDTESi 1. DIMENSIONAL LIMITS ARE +0.005' UNLESS OTHERWISE STATED. 2. CASE TEMPERATURE IS MEASURED DN THE CENTER OF THE BASEPLATE, 3. MATERIALS! CASE! STEEL, GDLD OVER NICKEL PLATED. CDVERj STEEL, NICKEL PLATED, PINS: ALLOY 52, GDLD DVER NICKEL PLATED, PIN SEALS! GLASS Figure 11 - Non-Flanged Package and Pinout

DVSB2800D SeriesPACKAGE SPECIFICATIONS (FLANGED) Pin Figure 12 - Flanged Package and Pinout

DVSB2800D SeriesENVIRONMENTAL SCREENING (100% Tested Per MIL-STD-883 as referenced to MIL-PRF-38534) Test 1. Contact Sales for more information concerning additional environmental screening and testing options desired. 2. VPT Inc. reserves the right to ship higher screened or SMD products to meet lower screened orders at our sole discretion unless specifically forbidden by customer contract. 3. 100% R&R testing with all test data included in product shipment. 4. Not required per MIL-PRF-38534. Test is performed for additional product quality assurance. 5. Non-QML products may not meet all...

DVSB2800D SeriesORDERING INFORMATION DVSB 1. Contact the VPT Inc. Sales Department for availability of Class H (/H) and KL1 (/KL1) qualified products. 2. VPT Inc. reserves the right to ship higher screened or SMD products to meet lower screened orders at our sole discretion unless specifically forbidden by customer contract. 3. -KL1 products are identical in every way with Class K products in compliance with MIL-PRF-38534 revision L and later revisions except they contain elements evaluated to the requirements of MIL-PRF-38534 revision K and previous revisions. These devices are not marked...

DVSB2800D SeriesSMD (STANDARD MICROCIRCUIT DRAWING) NUMBERS Standard Microcircuit Drawing (SMD) Do not use the DVSB2800D Series similar part number for SMD product acquisition. It is listed for reference only. For exact specifications for the SMD product, refer to the SMD drawing. SMDs can be downloaded from the DLA Land and Maritime (Previously known as DSCC) website at https://landandmaritimeapps.dla.mil/programs/defaultapps.asp. The SMD number listed above represents the Federal Stock Class, Device Type, Device Class Designator, Case Outline, Lead Finish and RHA Designator (where...