IRF GH2802R5SCKC High reliability, high efficiency radiation hardened dc-dc converter Datasheet

PD-97440C
GH-SERIES
HIGH RELIABILITY, HIGH EFFICIENCY
RADIATION HARDENED
DC-DC CONVERTER
28V Input, Single Output
Description
The GH series is a family of low voltage single output
DC-DC converters. They are specifically designed in
response to the need for low voltage at moderate current
levels with the high efficiency and tight regulation
dictated by modern digital processing applications. The
converters are radiation hardened, high reliability
converters designed for extended operation in hostile
environments. Their small size and low weight make
them ideal for applications such as geostationary earth
orbit satellites and deep space probes. They exhibit a
high tolerance to total ionizing dose, single event effects
and environmental stresses such as temperature
extremes, mechanical shock, and vibration. All
components are fully de-rated to meet the requirements
of MIL-STD-975, MIL-STD-1547 except for the CDR type
of capacitors, a capacitor with 50V rating is used for incircuit voltage stress of less than10V. Thorough analyses
and documentation including beginning-of-life (BOL)
and end-of-life (EOL) electrical worst case (WCA)
operation, component stress and de-rating, radiation
susceptibility (TREE), thermal stress, failure mode and
effects (FMEA), and reliability (MTBF) are available for
customer review.
The design incorporates a fixed frequency topology
with magnetic feedback. Synchronous rectification is
deployed to maximize efficiency performance. The
converters include an internal EMI filter that is capable
of meeting the conducted emission requirements of
most major satellite power busses. Incorporation of
many functional features including on/off command,
remote sensing, and under-voltage lockout make the
design suitable for today’s space design applications.
The converter is enclosed in a hermetically sealed
package with the overall dimensions of 3.5"L x 2.50”W
x 0.475"H including the I/O pins and mounting tabs.
The package base material is silicon carbidealuminum (AISIC). The package ring frame is Alloy
48. The package utilizes rugged ceramic feed-through
copper core I/O pins and is sealed using parallel
seam welding. The total mass of a converter is less
than 110 grams.
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GH
Features
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Total Ionizing Dose (TID) > 100 KRad(Si)
SEE Hardened to LET Level > 82 MeV.cm2/mg
Internal EMI filter
Low Weight, < 110 grams
Magnetically Coupled Feedback
18V to 40V DC Input Range
Up to 50W Output Power
Single Output Models Include
1V, 1.5V, 1.8V, 2.5V, 3.3V and 5V
High Efficiency - to 87%
-55°C to +85°C Operating Temperature Range
100MΩ @ 100VDC Isolation
Under-Voltage Lockout
Short Circuit and Overload Protection
Output Voltage Adjust
Synchronization Output and Input
Remote Sense
External Inhibit
Applications
n
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Deep Space Satellites / Probes
Strategic Weapons and Communication System
Geostationary Earth Orbit Satellites (GEO)
Manufactured in a facility fully qualified to MILPRF-38534, these converters are fabricated
utilizing DLA Land and Maritime qualified
processes. For available screening options, refer
to device screening table in the data sheet.
Non-flight versions of the GH-Series converters
are available for system development purposes.
Variations in electrical specifications and
screening to meet custom requirements can be
accommodated.
1
10/12/12
GH-SERIES
(28V Input, Single Output)
Specifications
Absolute Maximum Ratings
Recommended Operating Conditions
Input voltage range
Output power
Lead temperature
Operating temperature
Storage temperature
Input voltage range
Output power
Operating temperature
-0.5Vdc to +50Vdc
Internally limited
+300°C for 10 seconds
-55°C to +125°C
-55°C to +135°C
Operating temperature
1
+18Vdc to +40Vdc
0 to Max. Rated
-55°C to +85°C
-55°C to +80°C
1
Meets derating per MIL-STD-975
Electrical Performance Characteristics
Parameter
Group A
Subgroup
Conditions
-55°C ≤ TC ≤ +85°C
VIN = 28V DC ± 5%, CL = 0
unless otherwise specified
Input Voltage
Output Voltage (Vout)
GH2801S
GH2801R5S
GH2801R8S
GH2802R5S
GH2803R3S
GH2805S
GH2801S
GH2801R5S
GH2801R8S
GH2802R5S
GH2803R3S
GH2805S
Output power (POUT)
GH2801S
GH2801R5S
GH2801R8S
GH2802R5S
GH2803R3S
GH2805S
Output current (IOUT)
GH2801S
GH2801R5S
GH2801R8S
GH2802R5S
GH2803R3S
GH2805S
1
1
1
1
1
1
IOUT = 100% rated load
Limits
Unit
Min
Nom
18
28
Note 3
0.98
1.48
1.77
2.47
3.28
4.98
1.00
1.50
1.80
2.50
3.30
5.00
0.96
1.45
1.75
2.45
3.24
4.93
2,3
2,3
2,3
2,3
2,3
2,3
VIN = 18, 28, 40 Volts, Note 2
1,2,3
VIN = 18, 28, 40 Volts, Note 2
1,2,3
Max
40
V
Note 3
1.02
1.52
1.83
2.53
3.32
5.02
1.04
1.55
1.85
2.55
3.36
5.07
0
0
0
0
0
0
20
30
36
50
50
50
0
0
0
0
0
0
20
20
20
20
15.15
10
V
W
A
Line regulation (VRLINE)
1,2,3
VIN = 18, 28, 40 Volts
IOUT = 0, 50%, 100% rated
-10
10
mV
Load regulation (VRLOAD)
1,2,3
IOUT = 0, 50%, 100% rated
VIN = 18, 28, 40 Volts
-0.5
0.5
%
Input current (IIN)
1,2,3
IOUT = 0, Pin 3 open
130
200
mA
Pin 3 shorted to pin 2
2.0
5.0
For Notes to Electrical Performance Characteristics, refer to page 4
2
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GH-SERIES
(28V Input, Single Output)
Electrical Performance Characteristics
Parameter
Switching frequency (FS)
Synchronization Input
frequency range
pulse high level
pulse low level
pulse transition time
pulse duty cycle
Output ripple (VRIP)
GH2801S
GH2801R5S
GH2801R8S
GH2802R5S
GH2803R3S
GH2805S
Efficiency (EFF)
GH2801S
GH2801R5S
GH2801R8S
GH2802R5S
GH2803R3S
GH2805S
Inhibit Input
open circuit voltage
drive current (sink)
voltage range
Group A
Subgroup
Min
Nom
Max
1,2,3
Sync. Input (Pin 4) open
450
500
550
KHz
Ext. Clock on Sync. Input (Pin 4)
Note 1
450
4.0
-0.5
80
20
600
10.0
0.5
KHz
V
V
V/µs
%
IOUT = 100% rated load
1
1,2,3
1,2,3
Turn-on Response
Overshoot (VOSH)
Turn-on Delay (TDLY)
Note 1
80
5
5
5
10
10
10
70
72
75
81
83
85
15
15
15
25
25
30
73
75
78
84
85
87
3.0
-0.5
Power dissipation, load fault (PD)
Output response to
step load changes (VTLD)
GH2801S
GH2801R5S
GH2801R8S
GH2802R5S
GH2803R3S
GH2805S
Recovery time,
step line changes (TTLN)
Unit
1,2,3
1,2,3
Output response to
step line changes (VTLN)
Limits
IOUT = 100% rated load
Note 4
Current Limit Point
Expressed as a percentage
of full rated load current
Recovery time,
step load changes (TTLD)
GH2801S
GH2801R5S
GH2801R8S
GH2802R5S
GH2803R3S
GH2805S
( continued )
Conditions
-55°C ≤ TC ≤ +85°C
VIN = 28V DC ± 5%, CL = 0
unless otherwise specified
mV p-p
%
5.0
100
50
V
µA
V
Vout = 90% of Nominal
125
135
%
Short Circuit, Overload, Note 6
17
25
W
Half Load to/from Full Load, Note 7
-300
-300
-300
-300
-300
-300
4,5,6
300
300
300
300
300
300
mV pk
Half Load to/from Full Load, Notes 7, 8
250
250
250
250
250
250
4,5,6
4,5,6
4,5,6
4,5,6
24V to/from 32V
IOUT = 100% rated load, Notes 1, 9
-50
24V to/from 32V
IOUT = 100% rated load, Notes 1, 8, 9
No Load, Full Load
Note 10
0
µs
50
mV pk
200
µs
250
5.0
mV
ms
For Notes to Electrical Performance Characteristics, refer to page 4
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3
GH-SERIES
(28V Input, Single Output)
Electrical Performance Characteristics
Parameter
Capacitive Load (CL)
Line Rejection
Electromagnetic Interference
(EMI), conducted emission (CE)
Isolation
( continued )
Group A
Subgroup
Conditions
-55°C ≤ TC ≤ +85°C
V IN = 28V DC ± 5%, CL = 0
unless otherwise specified
1
IOUT = 100% rated load
No effect on DC performance
Notes 1, 5
1
IOUT = 100% rated load
DC to 50KHz, Note 1
1
IOUT = 100% rated load, Note 1
1
Input to Output or Any Pin to Case
except pin 13, test @ 100VDC
Limits
Unit
Min
Nom
5000
40
60
µF
dB
Per Fig. 3
100
MΩ
Device Mass
MTBF
Max
110
MIL-HDBK-217F2, SF, 35°C,
Note 11
6
g
Hrs
5.8x10
Notes for the Electrical Performance Characteristics Table
1.
Parameter is tested as part of design characterization or after design changes. Thereafter, parameter shall be
guaranteed to the limits specified.
2. Parameter verified during line and load regulation tests.
3. These are beginning-of-life (BOL) limits. End-of-life (EOL) limits are -3% and +3% of nominal limit for Min and
Max, respectively.
4. Guaranteed for a D.C. to 20MHz bandwidth. Tested using a 20KHz to 10MHz bandwidth.
5. Capacitive load may be any value from 0 to the maximum limit without compromising dc performance. A
capacitive load in excess of the maximum limit may interfere with the proper operation of the converter’s
overload protection, causing erratic behavior during turn-on.
6. Overload power dissipation is defined as the device power dissipation with the load set such that VOUT = 90% of
nominal.
7. Load step slew rate ≤ 0.5A/µs.
8. Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1% of its
steady state value.
9. Line step slew rate ≤1.0V/µs.
10. Turn-on delay time from either a step application of input power or a logic low to a logic high transition on the
inhibit pin (pin 3) to the point where VOUT = 90% of nominal.
11. MIL-HDBK MOSFET failure rates replaced by empirical failure rate data supplied by International Rectifier.
Radiation Performance Characteristics
Test
Conditions
Min
Typ
Unit
MIL-PRF-883, Method 1019.5
Total Ionizing Dose (Gamma)
Operating bias applied during exposure,
Half Rated Load, VIN = 28V
100
Krads(Si)
82
MeVxcm /mg
Heavy Ions (LET)
Single Event Effects
Operating bias applied during exposure,
SEU, SEL, SEGR, SEB
Half Rated Load, VIN = 18V, 28V & 50V
2
Test lab: Cyclotron Institute,
Texas A & M University
International Rectifier currently does not have a DLA Land and Maritime certified Radiation Hardness
Assurance Program.
4
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GH-SERIES
(28V Input, Single Output)
Fig. 1 –Typical Efficiency vs Output Curent @ 25°C, 5V Output (GH2805S)
90
Efficiency vs. Output Current at 25ºC, 5V
Output (GH2805S)
85
Efficiency, %
80
75
70
65
18V Vin
28V Vin
40V Vin
60
55
50
45
40
0
2
4
6
8
10
Output Current, A
Fig. 2 –Typical Efficiency vs Temperature, 5V Output (GH2805S)
Efficiency vs. Temperature, 5V Output
(GH2805S)
90
85
Efficiency, %
80
75
-55ºC
25ºC
85ºC
70
65
60
55
50
0
2
4
6
8
10
Output Current, A
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5
GH-SERIES
(28V Input, Single Output)
Fig. 3 – EMI CE03 Specification Limits and Typical Performance
Fig. 4 Block Diagram - Single Output
7/8
PEAK
CURRENT
DETECTION
EMI
FILTER
Input 1
Output
9/10
Inhibit 3
UVLO &
INHIBIT
Output
Return
BIAS +12V
SUPPLY
Case 13
Input
2
Return
+9V Sec. Bias
SENSE
AMPLIFIER
ERROR
AMPLIFIER
Ref
Sync
4
Input
Sync
5
Output
6
OSCILLATOR
REF &
S.S.
Aout
PWM Bout
CONTROLLER
Vfb
Clk
S.S.
6 +Sense
11 -Sense
12 Output
Adjust
SAMPLE
&
HOLD
FEEDBACK
TRIGGER
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GH-SERIES
(28V Input, Single Output)
Application Note:
The GH-Series converters have an Output Adjust pin (pin 12), which when connected via an external resistor
(RADJ) to either the –sense (pin 11) or +sense (pin 6), allows the nominal output voltage to be adjusted. Use
the following equations with the parameters listed in Table 1 to calculate the required resistor value (RADJ).
For all Models, to adjust the output voltage higher:
R ADJ =
2× A
-B
V OUT - V NOM
where: RADJ is in Kohms
RADJ is connected to -sense and VNOM < VOUT < 1.1VNOM
VNOM is the nominal output voltage with the Adjust Pin left open
VOUT is the desired output voltage
A and B are parameters defined in Table 1
For all Models, to adjust the output voltage lower:
R ADJ =
where:
1
⎛
⎞
A
⎜
− 0.5 ⎟⎟
⎜ C (V
⎝
OUT − A)
⎠
-B
RADJ is in Kohms
RADJ is connected to +sense and D < VOUT < VNOM
VNOM is the nominal output voltage with the Adjust Pin left open
VOUT is the desired output voltage
A, B, C and D are parameters defined in Table 1
Table 1. Equation Parameters by Model
MODEL
EQUATION PARAMETERS
A
B
C
D
GH2801S
0.714
14.3
5.0
0.965
GH2801R5S
0.937
12.6
3.33
1.425
GH2801R8S
1.047
11.5
2.78
1.689
GH2802R5S
1.25
10
2.0
2.292
GH2803R3S
1.425
8.34
1.52
2.937
GH2805S
1.667
6.68
1.0
4.233
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7
GH-SERIES
(28V Input, Single Output)
Mechanical Diagram
3.055 MAX.
0.500
0.080
Max.
2.00
R0.0625
4 places
0.30
0.50
0.20
13
1
12
2
11
10
0.60
9
3
8
4
7
5
6
2.055
MAX.
2.30
2.500
0.200 Typ.
Noncum.
1.400
Ref.
Pin
Ø0.040
0.45
1.10
0.260
FLANGE DETAIL
3.50
Ref.
5
62
.0
R0
0.25
0.25
0.14
0.475
MAX.
0.40
Tolerance :
.XX
.XXX
±0.01
±0.005
Pin Designation
Pin #
Designation
Pin #
Designation
1
Input
8
Output
2
Input Return
9
Output Return
3
Inhibit
10
Output Return
4
Sync Input
11
- Sense
5
Sync Output
12
Output Adjust
6
7
+ Sense
Output
13
Case
Standard Microcircuit Drawing Equivalence Table
8
Standard Microcircuit
IR Standard
Drawing Number
Part Number
5962-1021701KXX
GH2803R3S/CKX
5962-1021901KXX
GH2805S/CKX
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GH-SERIES
(28V Input, Single Output)
Device Screening
Requirement
MIL-STD-883 Method
Temperature Range
No Suffix
d
CK
d
-55°C to +85°C
-55°C to +85°C
EM
-55°C to +85°C
Element Evaluation
MIL-PRF-38534
Class K
Class K
N/A
Non-Destructive Bond Pull
2023
Yes
Yes
N/A
Internal Visual
2017
Yes
Yes
c
Temperature Cycle
1010
Cond C
Cond C
Cond C
Constant Acceleration
2001, Y1 Axis
3000 Gs
3000 Gs
3000 Gs
PIND
2020
Cond A
Cond A
N/A
320 hrs @ 125°C
320 hrs @ 125°C
48 hrs @ 125°C
Burn-In
1015
( 2 x 160 hrs )
( 2 x 160 hrs )
Final Electrical
MIL-PRF-38534
-55°C, +25°C,
-55°C, +25°C,
-55°C, +25°C,
( Group A )
& Specification
+85°C
+85°C
+85°C
PDA
MIL-PRF-38534
2%
2%
N/A
Seal, Fine and Gross
1014
Cond A, C
Cond A, C
Cond A
Radiographic
2012
Yes
Yes
N/A
External Visual
2009
Yes
Yes
c
Notes:
c
d
Best commercial practice.
CK is a DLA Land and Maritime (formerly DSCC) part marking used to designate a Class K compliant hybrid.
The CK marking does not indicate the hybrid is radiation certified.
No Suffix is a radiation rated device but not available as a DLA Land and Martime qualified SMD per MIL-PRF-38534.
International Rectifier currently does not have a DLA Land and Maritime certified Radiation Hardness Assurance Program.
Part Numbering
GH 28 05 S /XX X
Model
Nominal Input
Voltage
28 = 28V
Output Voltage
01 = 1V, 01R5 = 1.5V
01R8 = 1.8V, 02R5 = 2.5V
03R3 = 3.3V, 05 = 5V
Lead Finish for CK only
C = Gold Plated
A = Solder Dipped
Blank for No Suffix and EM
Lead finish for No Suffix = Gold Plated
Lead finish for EM depending on availability
Screening Level
(Please refer to Screening Table)
No Suffix, EM, CK
Number of Outputs
S = Single
WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: (310) 252-7105
IR SAN JOSE: 2520 Junction Avenue, San Jose, California 95134, Tel: (408) 434-5000
Visit us at www.irf.com for sales contact information.
Data and specifications subject to change without notice. 10/2012
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