DVHE2800S
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DVHE2800S SeriesHIGH RELIABILITY HYBRID DC-DC CONVERTERS DESCRIPTION The DVHE series of high reliability DC-DC converters is operable over the full military (-55 °C to +125 °C) temperature range with no power derating. Operating at a fixed frequency, these regulated, isolated units utilize well controlled undervoltage lockout circuitry to eliminate slow start-up problems. The DVHE is optimized for low voltage applications with high efficiency synchronous rectification and fast transient response. 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 Efficiency, Up to 90% • Low Output Voltage Models • Up to 50 Watts Output Power • Up to 10 Amps Output Current • High Reliability • Very Low Output Noise • Wide Input Voltage Range: 16 to 40 Volts • Input Transient Voltage: 50 Volts for 1 sec • Output Voltage Trim +/-10% • NO Use of Optoisolators • Undervoltage Lockout • Short Circuit / Current Limit Protection • High Power Density: > 50 W/in3 • Industry Standard Package • Precision Seam Seal Hermetic Package • Flanged and Non-flanged Versions Available. • Custom Versions Available • Additional Environmental Screening Available • Meets MIL-STD-461C and MIL-STD-461D EMC Requirements When Used With a DVMC28 EMI Filter • MIL-PRF-38534 Element Evaluated Sales Information: Phone: (425) 353-3010 Fax: (425) 353-4030 E-mail: vptsales@vptpower.com

DVHE2800S SeriesSPECIFICATIONS (Tcase = -55°C to +125°C, Vin = +28V ± 5%, Full Load, Unless Otherwise Specified) ABSOLUTE MAXIMUM RATINGS 1. Dependent on output voltage. 2. Time for output voltage to settle within 1% of its nominal value. 4. Verified by qualification testing. 5. Correction factor of 0.12 added to ceramic capacitors.

DVHE2800S SeriesSPECIFICATIONS (Tcase = -55°C to +125°C, Vin = +28V ± 5%, Full Load, Unless Otherwise Specified) ABSOLUTE MAXIMUM RATINGS 1. Dependent on output voltage. 2. Time for output voltage to settle within 1% of its nominal value. 4. Verified by qualification testing. 5. Correction factor of 0.12 added to ceramic capacitors.

DVHE2800S Series BLOCK DIAGRAM PIN 1 28V IN O- Gate Drive _ UNDER VOLTAGE SHUTDOWN PRIMARY HOUSEKEEPING SUPPLY

DVHE2800S Series INHIBIT DRIVE CONNECTION DIAGRAMS 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) EMI FILTER HOOKUP DIAGRAM Figure 6 – Converter with EMI Filter

DVHE2800S SeriesOUTPUT VOLTAGE TRIM The output voltage can be trimmed down by connecting a resistor between the TRIM pin (PIN 2) and the +V OUT pin (PIN 5), or can be trimmed up by connecting a resistor between the TRIM pin (PIN 2) and the OUT COM pin (PIN 4). The maximum trim range is +10% up and -10% down. The appropriate resistor values versus the output voltage are given in the trim table below.

DVHE2800S Series EFFICIENCY PERFORMANCE CURVES (TCASE = 25°C, Full Load, Unless Otherwise Specified) VIN = 16V Efficiency (%) vs. Output Power (W) Efficiency (%) vs. Output Power (W) Output Power(W) Output Power(W) Output Power(W) Efficiency (%) vs. Output Power (W) Efficiency (%) vs. Output Power (W)

DVHE2800S SeriesEMI PERFORMANCE CURVES (Tcase = 25°C, Vin = +28V ± 5%, Full Load, Unless Otherwise Specified) Emission Level [dBuA] Emission Level [dBuA] Figure 13 - DVHE2800S with DVMC28 EMI Filter

DVHE2800S SeriesPACKAGE SPECIFICATIONS (NON-FLANGED, SEAM SEAL) 0.405' max [10,29mn] SIDE VIEW NDTESi 1, DIMENSIONAL LIMITS ARE +0.005' UNLESS OTHERWISE STATED, 2, CASE TEMPERATURE IS MEASURED ON THE CENTER OF THE BASEPLATE. 3, MATERIALS: CASFi STEEL, GOLD OVER NICKEL PLATED. COVER; KOVAR, NICKEL PLATED. PINS: COPPER CORED ALLOY 52, GOLD OVER NICKEL PLATED, PIN SEALS: CERAMIC Figure 14 - Non-Flanged, Seam Seal Package and Pinout

DVHE2800S SeriesPACKAGE SPECIFICATIONS (FLANGED, SEAM SEAL) Pin Figure 15 - Flanged, Seam Seal Package and Pinout

DVHE2800S SeriesENVIRONMENTAL SCREENING (100% Tested Per MIL-STD-883 as referenced to MIL-PRF-38534) Test © 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...

DVHE2800S SeriesORDERING INFORMATION DVHE Notes: 1. Contact the VPT Inc. Sales Department for availability of Class H (/H) or Class K (/K) 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. 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...

DVHE2800S SeriesSMD (STANDARD MICROCIRCUIT DRAWING) NUMBERS Standard Microcircuit Drawing (SMD) Do not use the DVHE2800S 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. SMD’s 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 is for standard gold plated lead finish and no RHA (Radiation Hardness Assurance) level. Please reference the SMD for other...