DVEHF2800T SeriesHIGH RELIABILITY HYBRID DC-DC CONVERTERS WITH INTEGRAL EMI FILTER DESCRIPTION The DVEHF 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 DVEHF 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 450 kHz, these regulated, isolated units utilize a high speed magnetic feedback design and well controlled undervoltage lockout circuitry to eliminate slow startup 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 10 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 Seal Hermetic Package • Custom Versions Available • Additional Environmental Screening Available • No External EMI Filter Required • Meets MIL-STD-461C and MIL-STD-461D EMC Requirements • Protects Against Conducted Susceptibility Specified in MIL-STD-461C, SC01 and CS02 • Non-flanged Version Available • MIL-PRF-38534 Element Evaluated Sales Information: Phone: (425) 353-3010 Fax: (425) 353-4030 E-mail: [email protected]

DVEHF2800T SeriesSPECIFICATIONS (Tcase = -55°C to +125°C, Vin = +28V ± 5%, Full Load5, 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. 6. Up to 70% of the total auxiliary power or current can be drawn from either of the auxiliary outputs. 7. 5% load to full load at -55°C. 8. Correction factor of 0.12 added to ceramic capacitors.

DVEHF2800T Series BLOCK DIAGRAM PRIMARY HO USEKE EPI NG SUPPLY SE CO NDA RY HO USKEE PING SUPPLY

DVEHF2800T Series CONNECTION DIAGRAM 1 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)

DVEHF2800T Series EFFICIENCY PERFORMANCE CURVES (TCASE = 25°C) VIN = 15V Figure 7 – DVEHF28512T Efficiency (%) vs. Output Power (W) Figure 8 – DVEHF28515T Efficiency (%) vs. Output Power (W)

(Tcase = 25°C, Vin = +28V ± 5%, Full Load, Unless Otherwise Specified) Emission Level [dtJuVJ Emission Level [dBuv |

Figure 11 - Non-Flanged, Seam Seal Package and Pinout

Figure 12 - Flanged, Seam Seal Package and Pinout

ORDERING INFORMATION Notes: 1. VPT Inc. reserves the right to ship higher screened 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. CONTACT INFORMATION To request a quotation or place orders please contact your sales representative...