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| DVEHF2800T Series HIGH 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 is a fault tolerant magnetic feedback circuit. Operating at a nominal fixed frequency of 450 kHz per stage, these regulated, isolated units utilize 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 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 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 Solder 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 Components Figure 1 - DVEHF2800T DC-DC Converter (Not To Scale) 1X030DSD 11314 4th Avenue West, Suite 206 Everett, WA 98204 http://www.vpt-inc.com Sales Information: Phone: (425) 353-3010 Fax: (425) 353-4030 E-mail: vptsales@vpt-inc.com 1 DVEHF2800T Series SPECIFICATIONS (TCASE = -55C to +125C, VIN = +28V 5%, Full Load5, Unless Otherwise Specified) ABSOLUTE MAXIMUM RATINGS Input Voltage (Continuous) Input Voltage (Transient, 1 second) Output Power Power Dissipation (Full Load, TCASE = +125C) Parameter 50 VDC 80 Volts 10 Watts 5.0 Watts Junction Temperature Rise to Case Storage Temperature Lead Solder Temperature (10 seconds) Weight (Maximum) DVEHF28512T Min Typ 28 3.5 11.0 5.0 12.0 5.0 12.0 15 15 10 15 5 10 72 450 350 Max 50 80 6.0 70 1.5 13.0 12.0 8.0 5.05 12.12 5.075 12.6 10 5.0 3.5 1.0 0.29 50 50 20 50 20 50 50 7.5 7.5 500 550 Min 15 0 9.0 8.0 4.0 4.95 14.85 4.925 14.25 0 0.15 0 0 0 67 350 100 - +15C -65C to +150C 270C 50 Grams Units Max 50 80 6.0 70 1.5 13.0 12.0 8.0 5.05 15.15 5.075 15.75 10 5.0 3.5 1.0 0.23 50 50 20 50 20 50 50 7.5 7.5 500 550 V V mA mA V V V V V V V V W W W A A mVp-p mVp-p mV mV mV mV mV % W W F kHz M kHrs Conditions DVEHF28515T Typ 28 3.5 11.0 5.0 15.0 5.0 15.0 15 15 10 15 5 10 72 450 350 STATIC INPUT Voltage Current Inhibit Pin Input UVLO Turn On UVLO Turn Off OUTPUT Voltage 4 4 4 Continuous Transient, 1 sec Inhibited No Load 4 15 0 9.0 8.0 4.0 Inhibit Pin Open Circuit Voltage VMAIN VAUX VMAIN VAUX Total Power 4 TCASE = 25C TCASE = -55C to +125C 4.95 11.88 4.925 11.4 0 0.15 VMAIN VAUX 6 Either Output Either Output 5 6 0 0 0 5 Current 3 VMAIN VAUX VMAIN VAUX VMAIN VAUX VMAIN VAUX VAUX Ripple Voltage Line Regulation Load Regulation Cross Regulation EFFICIENCY Full Load , 20Hz to 10MHz VIN = 15V to 50V No Load to Full Load 67 350 +VOUT = 30%, -VOUT = 70% +VOUT = 70%, -VOUT = 30% Full Load Overload 5 4 LOAD FAULT POWER DISSIPATION CAPACITIVE LOAD ISOLATION MTBF (MIL-HDBK-217F) 4 Short Circuit SWITCHING FREQUENCY 500 VDC, TCASE = 25C AIF @ TC = 55C 100 - 1X030DSD 2 DVEHF2800T Series SPECIFICATIONS (TCASE = -55C to +125C, VIN = +28V 5%, Full Load5, Unless Otherwise Specified) ABSOLUTE MAXIMUM RATINGS Input Voltage (Continuous) Input Voltage (Transient, 1 second) Output Power Power Dissipation (Full Load, TCASE = +125C) 50 VDC 80 Volts 10 Watts 5.0 Watts Junction Temperature Rise to Case Storage Temperature Lead Solder Temperature (10 seconds) Weight (Maximum) DVEHF28512T Min Typ Max Min +15C -65C to +150C 270C 50 Grams Parameter Conditions DVEHF28515T Typ Max Units DYNAMIC Load Step Output Transient Load Step Recovery 2 VMAIN VAUX VMAIN VAUX VMAIN VAUX VMAIN VAUX VMAIN VAUX VIN = 0V to 28V VIN = 16V to 40V Half Load to Full Load - 200 100 200 200 200 50 200 200 20 - 500 400 500 500 600 100 500 500 30 25 50 - 200 100 200 200 200 50 200 200 20 - 500 400 500 500 600 100 500 500 30 25 50 mVPK mVPK Sec Sec mVPK mVPK Sec Sec mSec mVPK mVPK Line Step Output Transient Line Step Recovery Turn On Delay Turn On Overshoot 2, 4 4 Notes: 1. 2. 3. 4. 5. 6. This note intentionally not used. Time for output voltage to settle within 1% of its nominal value. Derate linearly to 0 at 135C. Verified by qualification testing. 5.0W on VMAIN and 2.5W on VAUX. Up to 70% of the total auxiliary power or current can be drawn from either of the auxiliary outputs. 1X030DSD 3 DVEHF2800T Series BLOCK DIAGRAM 28V IN PIN 1 +V MAIN PIN 7 MAIN COM EMI FILTER PIN 6 LINEAR REG IN COM PIN 10 +V AUX PIN 3 AUX COM LINEAR REG PRIMARY HOUSEKEEPING SUPPLY PWM CONTROLLER PIN 4 -V AUX PIN 5 TRANSFORMER ISOLATED SIGNAL FEEDBACK POWER FEEDFORWARD INH PIN 2 VOLTAGE ERROR AMPLIFIERS SECONDARY HOUSKEEPING SUPPLY Figure 2 1X030DSD 4 DVEHF2800T Series CONNECTION DIAGRAM 1 28V IN +V MAIN LOAD MAIN COM 6 28 Vdc 2 INH +V AUX LOAD AUX COM 4 LOAD 10 IN COM -V AUX 5 3 7 + - Figure 3 INHIBIT DRIVE CONNECTION DIAGRAMS 28V IN 1 10K INH 2 BIAS 28V IN 1 10K OPTOISOLATOR INH 2 BIAS OPTIONAL CAPACITOR IN COM 10 12V OPTIONAL CAPACITOR IN COM 10 12V Figure 4 - Internal Inhibit Circuit and Recommended Drive (Shown with optional capacitor for turn-on delay) Figure 5 - Isolated Inhibit Drive (Shown with optional capacitor for turn-on delay) 1X030DSD 5 DVEHF2800T Series EFFICIENCY PERFORMANCE CURVES (TCASE = 25C) VIN = 15V VIN = 28V VIN = 50V 75 70 Efficiency (%) 65 60 55 50 2.5 5 7.5 10 Output Power (W) Figure 7 - DVEHF28512T Efficiency (%) vs. Output Power (W) 75 70 Efficiency (%) 65 60 55 50 2.5 5 7.5 10 Output Power (W) Figure 8 - DVEHF28515T Efficiency (%) vs. Output Power (W) 1X030DSD 6 DVEHF2800T Series EMI PERFORMANCE CURVES (TCASE = 25C, VIN = +28V 5%, Full Load, Unless Otherwise Specified) Figure 9 - MIL-STD-461C DVEHF2800T Figure 10 - MIL-STD-461D DVEHF2800T 1X030DSD 7 DVEHF2800T Series PACKAGE SPECIFICATIONS (NON-FLANGED, SOLDER SEAL) TOP VIEW SIDE VIEW PIN 1 2 3 4 5 6 7 8 9 10 FUNCTION 28V IN INHIBIT +V AUX AUX COM -V AUX MAIN COM +V MAIN CASE N/C IN COM BOTTOM VIEW Figure 11 - Non-Flanged, Solder Seal Tin Plated Package and Pinout (Dimensional Limits are 0.005" Unless Otherwise Stated) 1X030DSD 8 DVEHF2800T Series PACKAGE PIN DESCRIPTION Pin 1 2 3 4 5 6 7 8 9 10 Function 28V IN INHIBIT +V AUX AUX COM -V AUX MAIN COM +V MAIN CASE N/C IN COM Description Positive Input Voltage Connection Logic Low = Disabled Output. Connecting the inhibit pin to input common causes converter shutdown. Logic High = Enabled Output. Unconnected or open collector TTL. Positive Auxiliary Output Voltage Connection Auxiliary Output Common Connection Negative Auxiliary Output Voltage Connection Main Output Common Connection Positive Main Output Voltage Connection Case Connection No Connection Input Common Connection 1X030DSD 9 DVEHF2800T Series ENVIRONMENTAL SCREENING (100% Tested Per MIL-STD-883 as referenced to MIL-PRF-38534) Screening NonDestructive Bond Pull Internal Visual Temperature Cycling Constant Acceleration MIL-STD-883 Standard (No Suffix) Extended /ES * * Method 2023 Method 2017, 2032 Internal Procedure Method 1010, -55C to 125C Method 2001, 500g, Y1 Direction * * * * Burn-In 96 hours at +125C 24 hours at +125C * * Final Electrical 100% at 25C Method 1014, Fine Leak, Condition A Method 1014, Gross Leak, Condition C -3 Dip (1 x 10 ) Method 2009 * * * * Hermeticity External Visual * * * 1X030DSD 10 DVEHF2800T Series ORDERING INFORMATION DVEHF 1 (1) Product Series DVEHF 28 2 (2) 5 3 12 4 T 5 /ES 6 (3) - XXX 7 (4) Auxiliary Output Voltages 12 15 12 Volts 15 Volts Nominal Input Voltage 28 28 Volts Main Output Voltage 5 + 5 Volts (5) Number of Outputs T Triple (6) Screening Code1 None /ES Standard Extended (7) Additional Screening Code Contact Sales 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 or the VPT Inc. Sales Department at: Phone: Fax: E-mail: (425) 353-3010 (425) 353-4030 vptsales@vpt-inc.com All information contained in this datasheet is believed to be accurate, however, no responsibility is assumed for possible errors or omissions. The products or specifications contained herein are subject to change without notice. 1X030DSD 11 |
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