SVFA0515S [VPT]

SPACE QUALIFIED POINT OF LOAD CONVERTERS;


型号：	SVFA0515S
厂家：	VPT, Inc.
描述：	SPACE QUALIFIED POINT OF LOAD CONVERTERS
文件：	总11页 (文件大小：556K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SVFA0510S SERIES

SPACE QUALIFIED POINT OF LOAD CONVERTERS

Models Available

Input: 5 V nominal

10 A output

Qualified to MIL-PRF-38534 Class H and Class K

SVFA Series DC-DC Converter

1.0 DESCRIPTION

1.2 SPACE LEVEL CHARACTERIZATIONS

The SVFA Series of space qualified point of load DC-DC

converters is specifically designed for the harsh radiation

environment of space applications. Performance is guaranteed

through the use of hardened semiconductor components,

radiation lot acceptance testing (RLAT) of non-hardened

components, and analysis. The SVFA Series has been

characterized for Total Ionizing Dose (TID) performance

including Enhanced Low Dose Rate Sensitivity (ELDRS) and for

Single Event Effects (SEE) according to VPT’s DLA-approved

Radiation Hardness Assurance (RHA) plan per MIL-PRF-38534,

Appendix G, Level P. Characterization is performed at both the

component level and at the SVFA Series hybrid converter level.

• Guaranteed TID performance to 40 krad(Si) including ELDRS

• SEE performance to 85 MeV-cm²/mg. Transients are fully

characterized for cross section and magnitude

• Worst-case analysis, stress, radiation, reliability reports available

1.3 MANUFACTURING AND COMPLIANCE

• Qualified to MIL-PRF-38534 Class H and Class K,

DLA SMD # 5962-16212

• MIL-PRF-38534 element evaluated components

• Manufactured in a MIL-PRF-38534 Class H and Class K facility

• MIL-STD-883

• ISO-9001

The SVFA Series of point of load DC-DC converters is radiation

tolerant and suited for use in low Earth orbit (LEO), medium

Earth orbit (MEO), geostationary orbit (GEO), deep space, and

launch vehicle programs.

1.4 PACKAGING

• Low-profile: 1.075” x 1.075” x 0.270”

• Max weight: 16 g

• Precision projection-welded hermetic metal case

1.1 FEATURES

1.5 SIMILAR PRODUCTS AND ACCESSORIES

• Operates from 5 V input

• Adjustable Output from 0.8 V to 3.4 V

• Up to 10 Amps Output

• High Efficiency, up to 94%

• High Power Density, >100 W/in³

• Output Inhibit Control

• Low Output Noise

• No Use of Optoisolators

• Short Circuit Protection

• SVFA0510SG 10 A space qualified point of load DC-DC converter

• SVFA0515S 15 A space qualified point of load DC-DC converter

• SVFA0515SG 15 A space qualified point of load DC-DC converter

• SVGA0510S 10 A space qualified point of load DC-DC converter

• SVGA0515S 15 A space qualified point of load DC-DC converter

• SVRGA0508S 8 A space qualified point of load DC-DC converter

• Custom versions available

• Space qualified isolated DC-DC converters, 15 - 100 W

• EMI filters

Sales Information

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Fax: (425) 353-4030

Web: www.vptpower.com

SVFA0510S - 6.0

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SVFA0510S Series

2.0 DIAGRAMS

2.1 BLOCK DIAGRAM

+VIN

COM

+VOUT

COM

UNDER

VOLTAGE

SHUTDOWN

PWM

CONTROL

FEEDBACK

COMPENSATION

+SENSE

NETWORK

INH

TRIM

2.2 CONNECTION DIAGRAM

+VIN

N/C

+VOUT

+SENSE

+VIN

100uF

LOAD

INH

TRIM

COM

3.0 SPECIFICATIONS

3.1 ABSOLUTE MAXIMUM RATINGS

Absolute Maximum Ratings

Input Voltage (Continuous):

-0.3 V to 7 V

Operating Temperature (Full Load):

Storage Temperature:

-55 °C to +125 °C

-65 °C to +150 °C

270 °C

Input Voltage (Transient, 1 second):

ESD Rating per MIL-PRF-38534:

-0.3 V to 7.5 V

Lead Solder Temperature (10 seconds):

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SVFA0510S - 6.0

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SVFA0510S Series

3.2 PERFORMANCE SPECIFICATIONS

Tcase = -55 °C to +125 °C, Vin = +5 V ± 1%, Full Load, Unless Otherwise Specified

SVFA0510S

Parameter

Conditions

Min

Typ

Max

Units

INPUT

Vout = 0.8 V to 2.5 V

Vout = 2.6 V to 3.3 V

INH < 1.5 V

3.5

7.0

150

Voltage

4.1

Current

100

3.0

2.7

No Load

4,5

Turn-On

Undervoltage Lockout

Turn-Off

OUTPUT STATIC

Voltage

Tcase = 25 °C

-1.0

-1.5

+1.0

+1.5

%Vout

Tcase = -55 °C to +125 °C

Power

Current

100

Ripple Voltage

Load Regulation

20 Hz to 10 MHz

No Load to Full Load

Vout = 3.3 V

1.5

mVpp

Load Fault Power Dissipation

OUTPUT DYNAMIC

Load Step, Half to Full Load, Vout = 3.3 V

Output Transient

120

µs

Recovery

Turn-On, Vin = 0 to 5 V

Delay

Overshoot

mVpk

FUNCTION

Output Inhibited

Output Enabled

1.5

Vin

INH Pin Input

4.7

INH Pin Open Circuit Voltage

GENERAL

Efficiency

Vout = 3.3 V

5000

µF

Capacitive Load

Switching Frequency

Weight

200

250

315

kHz

Standard package option

SF @ Tcase = 55 °C

MTBF (MIL-HDBK-217F)

6.9

MHr

POST-RAD END-OF-LIFE LIMITS

OUTPUT Voltage

Tcase = -55 °C to +125 °C

-3.0

190

185

+3.0

325

350

%Vout

kHz

Switching Frequency

Tcase = -55 °C to +125 °C, Vin = 5 V

Tcase = -55 °C to +125 °C, Vin = 3.6 V to 7 V

kHz

1. Performance specifications are met with 100 µF from VIN to COM

2. Dependent on output voltage

3. Time for output voltage to settle within 1% of steady-state value

4. Verified by qualification testing

5. Output voltage not necessarily in regulation

6. End-of-Life performance includes aging and radiation degradation and is within standard limits except where noted

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SVFA0510S Series

4.0 PERFORMANCE CURVES

4.1.1 SVFA0510S Efficiency (Typical, 25 °C)

4.1.2 SVFA0510S Efficiency (Typical, 25 °C)

Output Voltage:

3.3 V

Output Voltage:

2.5 V

Output Current (A)

4.1.3 SVFA0510S Efficiency (Typical, 25 °C)

4.1.4 SVFA0510S Efficiency (Typical, 25 °C)

Output Voltage:

1.5 V

Output Voltage:

1.0 V

Output Current (A)

4.1.5 SVFA0510S Efficiency (Typical, 25 °C)

Output Voltage:

0.8 V

Output Current (A)

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SVFA0510S Series

5.0 MECHANICAL OUTLINES AND PINOUT

Standard Package Option:

1. Tolerances are +0.005” unless otherwise stated

2. Case temperature is measured on the center of the baseplate surface

3. Materials: Case (Steel, gold over nickel plated); Cover (Steel, nickel plated); Pin (Copper-cored alloy 52, gold over nickel plated); Pin Seals (Glass)

Pin Function

+VIN

COM

INH

N/C

COM

+SENSE

TRIM

+VOUT

CASE

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SVFA0510S Series

6.0 TECHNICAL NOTES

Please note that many of these functions are also demonstrated in detail on the VPT website in the

form of technical video labs.

6.1 GENERAL INFORMATION

6.1.1 Topology Description

The SVFA0510S Series is a non-isolated, fixed-frequency, radiation-hardened, synchronous buck converter. It operates from a 5 V

input and provides a stepped-down, precisely regulated, programmable output voltage at very-high efficiency. The SVFA0510S is

optimized for low voltage point of load applications.

6.1.2 External Components

The SVFA0510S Series has internal input and output capacitors. To meet the performance specifications in Section 3.2, a minimum

additional 100 µF tantalum input decoupling capacitor is required. The SVFA0510S is stable with no load capacitance. Additional output

capacitance is allowed up to the maximum listed in Section 3.2.

6.1.3 Source Impedance

The impedance of the 5 V input source can interact with the point of load converter and can affect performance. High source

impedance is often caused by a long input cable or other components added in series with the input. In some cases, additional input

capacitance will be needed to stabilize the system.

6.2 FUNCTION DESCRIPTIONS

+VIN

6.2.1 On/Off Control (Inhibit)

The INH (Inhibit) pin is a control pin referenced to COM. The INH pin must be driven

using an open-collector or open-drain configuration. Pulling the INH pin low disables

the converter output. Leaving INH open enables the output, allowing the converter to

47K

INH

operate normally. The pin must be pulled below 1.5 V to disable the output. An

OPTIONAL

CAPACITOR

optional capacitor from INH to COM may be used to delay turn-on. The INH pin should

be left open if not used.

COM

6.2.2 Adjusting the Output Voltage (TRIM)

The output voltage of the converter is set with an external resistor connected from the TRIM pin to the COM pin. This resistor must

have a tolerance of 1% or better to achieve an accurate output voltage. The default output voltage with the TRIM pin left open is 0.8 V.

+VOUT

SVFA0510S

+Vout (V)

Rtrim (Ω)

None

205k

100

30K

0.8

+SENSE

TRIM

0.9

1.0

99.9k

47.4k

24.9k

15.9k

13.9k

12.4k

7.25k

5.4k

1.2

1.5

1.8

5.1K

1.9

2.0

2.5

R-TRIM

210K

0.7 V

2.8

3.0

4.44k

3.30k

2.98k

COM

3.3

3.4

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SVFA0510S Series

6.3 PROTECTION FEATURES

6.3.1 Input Undervoltage Lockout

The SVFA0510S Series provides input undervoltage lockout protection. For input voltages below the turn-on voltage, the converter will

remain off. When the input voltage exceeds the turn-on voltage, the converter will start. For input voltages below the operating range of

the converter but above the UVLO turn-off voltage, the converter may reach its maximum duty cycle and the output may drop out of

regulation.

6.3.2 Output Soft-Start

The SVFA0510S Series utilizes an output soft-start function to ramp the output in a controlled manner, eliminating output voltage

overshoot and limiting inrush current at turn on. A voltage mode soft-start ensures the output waveform remains consistent regardless

of changes in the load current. The output rise time is approximately 3 ms. The soft-start function is active whether the module is

turned on with an application of input voltage or from release of the INH pin. The turn-on delay time is specified from the application of

input voltage (or release of INH pin) until the output reaches 90% of its final value.

6.3.3 Output Short Circuit Protection

The SVFA0510S Series provides output short circuit protection. When a sustained high peak current is detected, the converter will shut

down and enter a hiccup mode. After a delay, the converter will attempt a soft-start. This sequence will continue until the fault is

removed, allowing the converter to soft-start and resume normal operation.

6.4 THERMAL CONSIDERATIONS

The SVFA0510S is rated for full power operation at 125 °C. Operation above 125 °C is allowed at reduced power. Specifically, the

output power should be derated linearly from full power at 125 °C to half power at 130 °C and to zero power at 135 °C. The operating

temperature of the converter is specified on the baseplate of the converter. The converter is designed to be conduction-cooled, with the

baseplate mounted to a heat sink, chassis, PCB or other thermal surface. The internal power dissipating components are mounted to

the baseplate of the converter and all heat flow is through the baseplate. The lid of the converter does not provide a good thermal path.

The hybrid DC-DC converter contains many semiconductor components. The maximum temperature rise from junction to case is 11 °C

at full load.

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SVFA0510S Series

6.5 RADIATION HARDNESS ASSURANCE

VPT takes a conservative approach to radiation testing to ensure product performance in a space environment. VPT’s DLA-approved

Radiation Hardness Assurance (RHA) plan documents VPT’s processes and procedures for guaranteeing the performance of VPT

products under various environmental conditions in space including Total Ionizing Dose (TID) and Single-Event Effects (SEE).

Additionally, Enhanced Low Dose-Rate Sensitivity (ELDRS) effects are considered for all bipolar ICs used in the hybrid. Hardness is

guaranteed by a combination of both hybrid-level characterization and Radiation Lot Acceptance Testing (RLAT) of all sensitive

semiconductor piece-parts used within the hybrid.

6.5.1 Radiation Test and Performance Levels

Hybrid-Level

Characterization

Radiation Environment

Piece Part RLAT

High Dose Rate (HDR)

Low Dose Rate (LDR)

40 krad(Si)

¹40 krad(Si)

40 krad(Si)

Total Ionizing Dose

(TID)

Destructive (SEB, SEGR, SEL)

Non-Destructive (SET, SEU)

Not applicable

≥ 85 MeV/mg/cm²

Single-Event Effects

(SEE)

Displacement Damage

(DD)

1x10¹²n/cm²

Not applicable

1. Piece-part LDR screening performed only on potentially ELDRS parts (bipolar ICs).

6.5.2 RHA Plan Summary

Test

RHA Plan for SVL Series Isolated DC-DC Converters

Sensitive semiconductor components undergo RLAT to 40 krad(Si) per

MIL-STD-883 Method 1019. Converters are characterized to 40 krad(Si).

Total Ionizing Dose (TID):

All bipolar linear ICs are characterized for ELDRS and tested in accordance

with MIL-STD-883 test method 1019 section 3.13

Enhanced Low Dose Rate Sensitivity (ELDRS):

Converters are characterized to LET ≥ 85 MeV/mg/cm²for both catastrophic

events (SEL, SEB, SEGR) and functional interrupts (SEFI) under heavy ion

exposure. Converters are also characterized for cross-section and magnitude

of output transients (SET) for at least 3 different LET levels.

Single Event Effects (SEE):

All production lots of sensitive semiconductor components undergo RLAT for

TID at HDR and/or LDR as appropriate per part type.

Sensitive semiconductor components undergo RLAT to 1x10¹²n/cm²per

MIL-STD-883 Method 1017.

Radiation Lot Acceptance Testing (RLAT):

Displacement Damage (DD):

6.5.3 RHA Designators available on SMD

The SVFA0510S series converters are available on SMD with RHA level P. See section 8.0 for full SMD number information.

6.5.4 Supporting Documentation Available (Contact Sales)

•

Radiation Hardness Assurance Plan:

Worst-Case Analysis Report:

DLA-approved RHA plan covering TID, SEE, and ELDRS

Detailed worst-case analysis including electrical stress/derating limits and

guaranteed circuit performance post-radiation and end of life

•

Radiation Test Summary Report:

Overview of piece-part RLAT and hybrid characterization for all guaranteed

environments. Also includes SEE cross-section data.

•

Reliability Report:

MTBF report based on MIL-HDBK-217 reliability calculations.

Component temperature rise analysis and measurement results.

Thermal Analysis Report:

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SVFA0510S Series

7.0 ENVIRONMENTAL SCREENING

100% tested per MIL-STD-883 as referenced to MIL-PRF-38534.

Contact sales for more information concerning additional environmental screening and testing options. VPT Inc. reserves the right to

ship higher screened or SMD products to meet orders for lower screening levels at our sole discretion unless specifically forbidden by

customer contract.

/EM

/H+

(Engineering Model)

Non-QML^1,6

MIL-STD-883 Test

Method, Condition

Test

(Class H + PIND)

(Class K)

Non-Destructive

Bond Pull

TM2023

●

TM2010, TM2017, TM2032

(MIL-STD-750, TM2072,

TM2073)

Internal Visual

●

TM1010, Condition C

-65 °C to 150 °C, Ambient

Temperature

Cycling

●

Constant

Acceleration

TM2001, 3000g, Y1

Direction

●

TM2020, Condition A

25 °C

PIND

●

Pre Burn-In

Electrical

TM1015, 320 hrs.,

125 °C, Case Typ

●

TM1015, 160 hrs.,

125 °C, Case Typ

Burn-In

●

24 hrs., 125 °C, Case Typ

●

MIL-PRF-38534, Group A

Subgroups 1-6

●

-55 °C, 25 °C, 125 °C

Final Electrical

MIL-PRF-38534, Group A

Subgroups 1 and 4

25 °C

TM1014, Fine Leak,

Condition A2 or B1

●

Hermeticity

(Seal)

TM1014, Gross Leak,

Condition C or B2

Gross Leak, Dip (1x10^-3)

●

TM2012

●

Radiography

External Visual

TM2009

●

1. Non-QML products may not meet all requirements of MIL-PRF-38534

2. Not required per MIL-PRF-38534. Test performed for additional product quality

assurance

4. 100% R&R testing with all test data included in product shipment

5. Radiographic test Certificate of Compliance and film(s) or data CD included in

product shipment

3. PIND test Certificate of Compliance included in product shipment

6. Engineering models utilize only the screening specified and are not considered

compliant for flight use

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SVFA0510S Series

8.0 STANDARD MICROCIRCUIT DRAWING (SMD) NUMBERS

Standard Microcircuit SVFA0510S Series

Drawing Number Similar Part Number

5962P1621201HXC

5962P1621201HXA

5962P1621201KXC

5962P1621201KXA

SVFA0510S/H+

SVFA0510S/H+-E

SVFA0510S/K

SVFA0510S/K-E

Do not use the SVFA0510S 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. All SMD products are marked with a “Q” on the

cover as specified by the QML certification mark requirement of MIL-PRF-38534.

9.0 ORDERING INFORMATION

SVFA

XXX

(1)

Product

Series

(2)

(3)

(4)

(5)

(6)

Nominal Input

Voltage

Output Current

Number of

Outputs

Screening Code^1,2,3

Additional

Screening

Code

SVFA

05 5 Volts

10 10 Amps

Single

/EM Engineering Model

/H+ Class H + PIND

/K Class K

Contact Sales

Contact the VPT Sales Department for availability of Class H (/H) or Class K (/K) qualified products

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

Engineering models utilize only the standard screening specified and are not considered compliant for flight use. These models are intended for low volume engineering

characterization only and have no guarantee regarding operation in a radiation environment. The customer must place the following statement on each line item of their

purchase order(s) for /EM units when ordering engineering models:

“(Customer Name) acknowledges that the /EM unit listed in this line item is not permitted for flight use and will be used for Engineering characterization only.”

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 requirements, source inspection, and/or special element evaluation

for space or other higher quality applications.

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SVFA0510S Series

10.0 CONTACT INFORMATION

To request a quotation or place orders please contact your sales representative or the VPT, Inc. Sales Department at:

Phone:

Fax:

(425) 353-3010

(425) 353-4030

E-mail:

vptsales@vptpower.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.

11.0 ADDITIONAL INFORMATION

Visit the VPT website for additional technical resources, including:

Product Catalogs

Application Notes and White Papers

Technical Video Labs

Additional Products For Avionics/Military,

Hi-Rel COTS, and Space Applications

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SVFA0515S [VPT]

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