ADDC02808PBKV Analog Devices, ADDC02808PBKV Datasheet

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ADDC02808PBKV

Manufacturer Part Number
ADDC02808PBKV
Description
28 V/ 200 W Pulsed DC/DC Converter with Integral EMI Filter
Manufacturer
Analog Devices
Datasheet
a
GENERAL DESCRIPTION
The ADDC02808PB hybrid military dc/dc converter is com-
pensated specifically for pulse applications where fast transient
response and minimum output voltage deviation are required.
It is also designed to deliver very high, pulsed output power.
The unit is designed for high reliability and high performance
applications where saving space and/or weight are critical.
The ADDC02808PB has been characterized over a wide variety
of load conditions. Its transient response has been set to insure
output stability over a broad range of load capacitance. For
applications that require factory modified compensation
optimized for a specific load, or for applications that require a
different output voltage than 8 V dc, contact the factory.
The ADDC02808PB is available in a hermetically sealed,
molybdenum based hybrid package and is easily heatsink
mountable. Three screening levels are available, including
military SMD.
REV. A
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
FEATURES
28 V dc Input, 8 V dc @ 25 A, 200 W Pulse Output
Integral EMI Filter
Ultrafast Transient Response
Minimal Output Voltage Deviation
Low Weight: 80 Grams
NAVMAT Derated
Many Protection and System Features
APPLICATIONS
Distributed Power Architecture for Driving T/R Modules
Motor and Actuator Drivers
28 V, 200 W Pulsed DC/DC Converter
PRODUCT HIGHLIGHTS
1. 120 W/cubic inch pulsed power density with an integral EMI
2. Ultrafast transient response time with minimum output
3. Light weight: 85 grams
4. Operational and survivable over a wide range of input condi-
5. High reliability; NAVMAT derated
6. Protection features include:
7. System level features include:
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
–SENSE
+SENSE
ADJUST
STATUS
INHIBIT
filter
voltage deviation
tions: 16 V–50 V dc; survives low line, high line
Output Overvoltage Protection
Output Short Circuit Current Protection
Thermal Monitor/Shutdown
Input Overvoltage Shutdown
Input Transient Protection
Current Sharing for Parallel Operation
Logic Level Disable
Output Status Signal
Synchronization for Multiple Units
Input Referenced Auxiliary Voltage Supply
I
SHARE
SYNC
TEMP
V
–V
+V
AUX
IN
IN
OUTPUT SIDE
FUNCTIONAL BLOCK DIAGRAM
INPUT SIDE
EMI FILTER
CONTROL
CONTROL
CIRCUIT
CIRCUIT
with Integral EMI Filter
World Wide Web Site: http://www.analog.com
POWER TRAIN
INTERLEAVED
FREQUENCY
ADDC02808PB
ADDC02808PB
FIXED
DUAL
© Analog Devices, Inc., 1998
OUTPUT
FILTER
RETURN
RETURN
RETURN
+V
+V
+V
OUT
OUT
OUT

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ADDC02808PBKV Summary of contents

Page 1

... Three screening levels are available, including military SMD. REV. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices ...

Page 2

ADDC02808PB–SPECIFICATIONS ELECTRICAL CHARACTERISTICS – +90 C; all temperatures are case and T Parameter INPUT CHARACTERISTICS Steady State Operating Input Voltage Range Abnormal Operating Input Voltage Range 1 (Per MIL-STD-704D) Input Overvoltage Shutdown No Load Input Current Disabled Input ...

Page 3

... ORDERING GUIDE Operating Temperature Device Range (Case) ADDC02808PBKV – +85 C Hermetic Package ADDC02808PBTV – +90 C Hermetic Package 5962-9763401HXC – +125 C Hermetic Package (ADDC02808PBTV/QMLH) EXPLANATION OF TEST LEVELS ...

Page 4

ADDC02808PB–Typical Performance Curves 100 120 OUTPUT POWER – Watts Figure 1. Efficiency vs. Line and Load at +25 C (Load Pulsewidth ...

Page 5

FREQUENCY – Hz Figure 7. Audio Susceptibility (Magnitude 100 10 1 0.1 10 100 1k FREQUENCY – Hz Figure 8. Incremental Input Impedance ...

Page 6

ADDC02808PB–Typical EMI Curves & Test Setup for 28 V 130 CONDUCTED EMISSIONS CE101 110 90 CE101–1 4.5 AMPS 0.0001 0.001 FREQUENCY – MHz Figure 11. Conducted Emissions, MIL-STD-461D, CE101, +28 V Hot Line 100 W Load 130 ...

Page 7

BASIC OPERATION The ADDC02808PB converter uses a flyback topology with dual interleaved power trains operating 180 out of phase. Each power train switches at a fixed frequency of 500 kHz, resulting MHz fixed switching frequency as seen ...

Page 8

ADDC02808PB 250 MAXIMUM PEAK POWER LIMIT 200 10W ave 100W ave 150 50W ave 100 MAXIMUM CONTINUOUS POWER LIMIT PULSEWIDTH – ms Figure 17. Largest On-State Power vs. Pulsewidth that Maintains T 110 C ...

Page 9

TIME – s Figure 21. Predicted Response for 24 A Step Load Change in Load Current, di/ for C 2,000 F ...

Page 10

ADDC02808PB 8.1 8.0 7.9 7.8 7.7 7.6 7.5 7.4 –200 –100 0 100 200 300 400 TIME – s Figure 25. Predicted Response for 24 A Step Load Change, di/ with Factory Set Internal Compensation Optimized ...

Page 11

Even when the load current steps down to 0.1 A, the maximum deviation of the output voltage is only about 400 mV, or 5%. However important to realize that if the next power pulse occurs before this transient ...

Page 12

ADDC02808PB 1.0 0.8 0.6 0.4 0.2 0.0 1.0 4.0 7.0 10.0 I – Figure 33. Sink Capability of Status Output Pin AUX Pin 5 is referenced to the input return and provides a semi- regulated ...

Page 13

... The hottest semiconductors in the 100 W product line of Analog Devices’ high density power supplies are the switching MOSFETs and the output rectifiers. There is an area inside the main power ...

Page 14

ADDC02808PB SYSTEM INSTABILITY CONSIDERATIONS In a distributed power supply architecture, a power source pro- vides power to many “point-of-load” (POL) converters. At low frequencies, the POL converters appear incrementally as nega- tive resistance loads. This negative resistance could cause sys- ...

Page 15

Diodes (Switching, General Purpose, Rectifiers) 70% current (surge and continuous) derating 65% peak inverse voltage derating 110 C maximum junction temperature Diodes (Zeners) 70% surge current derating 60% continuous current derating 50% power derating 110 C maximum junction temperature Microcircuits ...

Page 16

... In response to these ambiguities, the Analog Devices’ con- verter has been tested for CE102 under a constant load and with the output ground floating. While these measurements ...

Page 17

RS101: This requirement is specialized and is intended to check for sensitivity to low frequency magnetic fields in the kHz range. The converter is designed to meet this require- ment. Consult factory for more information. RS103: ...

Page 18

ADDC02808PB –10 –20 1 • • FREQUENCY – Hz Figure 39. Change in ADDC02808PB Differential Emis- sions vs. ADDC02805SA Emissions with the Same Test Setup dB, by which the differential emissions ...

Page 19

R(t) is the probability of a device not failing prior to some time substitute = 1/MTBF in the above formula, then the expression becomes –t MTBF R This formula is the correct way to ...

Page 20

ADDC02808PB Screening Steps Industrial (KV) Pre-Cap Visual 100% Temp Cycle N/A Constant Acceleration N/A Fine Leak Guaranteed to Meet MIL-STD-883, TM1014 Gross Leak Guaranteed to Meet MIL-STD-883, TM1014 Burn-In N/A Final Electrical Test At +25 C, Per Specification Table NOMINAL ...

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