Catalog excerpts
DVWR2800T Series HIGH RELIABILITY HYBRID DC-DC CONVERTERS DESCRIPTION The DVWR series of high reliability DC-DC converters is operable over the full military (-55 °C to +125 °C) temperature range with no power derating. Unique to the DVWR series are robust and effective input and output filters which provide dramatically reduced input and output noise performance when compared to other manufacturers competing devices. Operating at a nominal fixed frequency of 325 kHz, per stage, these regulated, isolated units utilize a high speed magnetic feedback design and well controlled undervoltage lockout circuitry to eliminate slow start-up problems. These converters are designed and manufactured in a facility qualified to ISO9001 and certified to MIL-PRF-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 FEATURES • High Reliability • Very Low Output Noise • Wide Input Voltage Range: 15 to 50 Volts per MIL-STD-704 • Up to 25 Watts Output Power • Fault Tolerant Magnetic Feedback Circuit • NO Use of Optoisolators • Undervoltage Lockout • Indefinite Short Circuit Protection • Current Limit Protection • Industry Standard Pinout • High Input Transient Voltage: 80 Volts for 1 sec per MIL-STD-704A • Precision Seam Welded Hermetic Package • High Power Density: > 28 W/in3 • Custom Versions Available • Additional Environmental Screening Available • Meets MIL-STD-461C and MIL-STD-461D EMC Requirements When Used With a DVMC28 EMI Filter • Flanged and Non-flanged Versions Available. • MIL-PRF-38534 Element Evaluated Sales Information: Phone: (425) 353-3010 Fax: (425) 353-4030 E-mail: vptsales@vptpower.com
Open the catalog to page 11. This note intentionally not used. 2. Time for output voltage to settle within 1% of its nominal value. 4. Verified by qualification testing. 5. 10W on Vmain and 15W on ±Vaux. 6. Up to 70% of the total auxiliary power or current can be drawn from either of the auxiliary outputs. 7. Synchronization is TTL signal with Vsync max = 6V. 8. -Vaux is 5% Load to Full Load at -550C.
Open the catalog to page 3DVWR2800T Series BLOCK DIAGRAM SYNC PIN 9 PRIMARY HOUSEKEEPING SUPPLY TRANSFORMER ISOLATED ERROR SIGNAL FEEDBACK VOLTAGE AND CURRENT ERROR AMPLIFIERS TRANSFORMER ISOLATED POWER FEEDFORWARD SECONDARY HOUSKEEPING SUPPLY
Open the catalog to page 4DVWR2800T Series CONNECTION DIAGRAM INHIBIT DRIVE CONNECTION DIAGRAMS BIAS OPTIONAL CAPACITOR IN COM 10 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)
Open the catalog to page 5DVWR2800T Series EMI FILTER HOOKUP DIAGRAM DVMC28 EMI FILTER 1 Figure 6 – Converter with EMI Filter
Open the catalog to page 6DVWR2800T Series EFFICIENCY PERFORMANCE CURVES (TCASE = 25°C) VIN = 15V Figure 7 – DVWR283R312T Efficiency (%) vs. Output Power (W) Figure 8 – DVWR283R315T Efficiency (%) vs. Output Power (W)
Open the catalog to page 7DVWR2800T Series EMI PERFORMANCE CURVES (TCASE = 25° VIN = +28V ± 5%, Full Load, Unless Otherwise Specified) C, Figure 9 – DVWR2800T without EMI Filter Figure 10 – DVWR2800T with EMI Filter
Open the catalog to page 8Figure 11 - Non-Flanged, Seam Seal Package and Pinout
Open the catalog to page 9Figure 12 - Flanged, Seam Seal Package and Pinout
Open the catalog to page 10© Contact Sales for more information concerning additional environmental screening and testing options desired. @ 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. © 100% R&R testing with all test data included in product shipment. © Not required per MIL-PRF-38534. Test is performed for additional product quality assurance. © Non-QML products may not meet all requirements of MIL-PRF-38534. © Note intentionally not used. @ PIND test Certificate of Compliance included in...
Open the catalog to page 12ORDERING INFORMATION Notes: 1. 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. Please contact your sales representative or the VPT Inc. Sales Department for more information concerning additional environmental screening and testing, different input voltage, output voltage, power requirement, source inspection, and/or special element evaluation for space or other higher quality applications.
Open the catalog to page 13Do not use the DVWR2800T 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 applicable). Please reference the SMD for other screening levels, lead finishes, and radiation levels....
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