DVHF2800D SeriesHIGH RELIABILITY HYBRID DC-DC CONVERTERS DESCRIPTION The DVHF 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 DVHF 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 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 20 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 Projection Welded Hermetic Package • High Power Density: > 37 W/in3 • Custom Versions Available • Additional Environmental Screening Available • Meets MIL-STD-461 Revisions C, D, E and F EMC Requirements When Used With VPT’s EMI Filters • Flanged and Non-flanged Versions Available. • MIL-PRF-38534 Element Evaluated Components • Space Applications should consider VPT’s "S” Series of Radiation Tolerant Power Conversion Devices. Contact VPT for details. Sales Information: Phone: (425) 353-3010 Fax: (425) 353-4030 E-mail: [email protected]

See notes next page.

DVHF2800D SeriesSPECIFICATIONS (Tcase = -55°C to +125°C, Vin = +28V ± 5%, Full Load5, 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 initial electrical design verification. Post design verification, parameter shall be guaranteed to the limits specified. 5. Half load at +Vout and half load at -Vout. 6. Up to 70% of the total power or current can be drawn from any one of the two outputs. 7. 5% Load to Full Load at -55°C. 8. Correction factor of 0.12 added to ceramic capacitors....

See notes next page.

DVHF2800D SeriesSPECIFICATIONS (Tcase = -55°C to +125°C, Vin = +28V ± 5%, Full Load5, 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 initial electrical design verification. Post design verification, parameter shall be guaranteed to the limits specified. 5. Half load at +Vout and half load at -Vout. 6. Up to 70% of the total power or current can be drawn from any one of the two outputs. 7. 5% Load to Full Load at -55°C. 8. Correction factor of 0.12 added to ceramic capacitors....

DVHF2800D Series BLOCK DIAGRAM D2 UNDER VOLTAGE SHUTDOWN PRIMARY HOUSEKEEPING SUPPLY VOLTAGE AND CURRENT AMPLIFIERS SECONDARY HOUSEKEEPING SUPPLY CONNECTION DIAGRAM

DVHF2800D Series INHIBIT DRIVE CONNECTION DIAGRAMS OPTIONAL CAPACITOR 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) EMI FILTER HOOKUP DIAGRAM DVMH28 EMI FILTER 1 Figure 6 – Converter with EMI Filter

DVHF2800D Series EFFICIENCY PERFORMANCE CURVES (TCASE = 25°C, Full Load, Unless Otherwise Specified) VIN = 16V Efficiency (%) vs. Output Power (W) Efficiency (%) vs. Output Power (W) Figure 9 – DVHF2815D Efficiency (%) vs. Output Power (W)

DVHF2800D Series CROSS REGULATION CURVES (TCASE = 25°C, Full Load, Unless Otherwise Specified) +Io = 10% Figure 12 – DVHF2815D -Vout (V) vs. -Iout (A)

DVHF2800D Series EMI PERFORMANCE CURVES (TCASE = 25°C, VIN = +28V ± 5%, Full Load, Unless Otherwise Specified) Figure 13 – DVHF2800D without EMI Filter Figure 14 – DVHF2800D with EMI Filter

Dimensional limits are ±0.005” unless otherwise specified. Case temperature is measured on the center of the baseplate. Material: Case (Steel, Gold over Nickel Plated), Cover (Steel, Nickel Plated), Pins (Alloy 52, Gold over Nickel Plated), Pin Seal (Glass).

1. Dimensional limits are ±0.005” unless otherwise specified. 2. Case temperature is measured on the center of the baseplate. 3. Mounting holes are not threaded. Recommended fastener is #4-40 screw. 4. Material: Case (Steel, Gold over Nickel Plated), Cover (Steel, Nickel Plated), Pins (Alloy 52, Gold over Nickel Plated), Pin Seal (Glass).

DVHF2800D 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 requirements...

1. Contact the VPT 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 with an SMD number or MIL-PRF-38534 certification...