Electronics
SATDH28S05, 3R3, 2R5
H-Series
30W Hermetic-Packaged, Single-Output, DC-DC Converter
(Preliminary Data sheet)
FEATURES
Wide Input Voltage Range: 18V to 40V
High Efficiency: >89% @ +3.3V, nominal load
Compliant to MIL-STD-704
EMI compliant to MIL-STD-461C
Under-Voltage Lockout
External Synch
Over-current protection
Over-temperature shutdown
No-Load Operation
No Opto-Isolators used
DESCRIPTION
The SATDH28S05 is a low cost DC-DC converter designed for high reliability military
applications. The compact, 10-pin, hermetic, flanged-package incorporates all
components for EMI filtering and Input surge protection to meet MIL-STD’s 461 & 704.
The SATDH28S05 provides up to 30W of output power over the full military
temperature range of -55
o
C to +125
o
C. This new innovative design uses a synchronous
Flyback topology with primary side feedback to achieve high efficiency and tight total
output regulation.
This H-series converter is manufactured in a facility in Marlborough, Mass. that is fully
qualified to MIL-PRF-38534, Class H & K. The SATDH converters are available as
COTS or Class H screened devices.
Models
Part Number
Quality Level
(MIL-PRF-
38534)
SATDH28S05C COTS, Class H
Max. Package
Dims. (not incl.
flanges)
Single Output,
Style 1:
1.95in. x
+5V, +3.3V,
1.35in. x 0.495in.
+2.5V
(L x W x H)
Description
Special
Features
High Efficiency
(89%, Low
Output ripple)
ABSOLUTE MAXIMUM RATINGS
(Exceeding maximum ratings may damage the device)
Symbol
Vin
Io
Rthjc
Tstg
Top
Wt
Visol
Tsold
Parameter
DC input
Output Current (Vo= +2.5V)
Thermal Resistance, Junction to Case
Storage Temperature
Operating Temperature Range
Package weight
Primary- Secondary Isolation
Maximum Soldering Temperature, 10sec
Value
50
12A
TBD
-65 to +150
-55 to +125
TBD
0.5
300
Unit
V
A
o
C/W
o
C
o
C
G
KV
o
C
SatCon Electronics
1
30W SATDH Preliminary Rev 2
ELECTRICAL CHARACTERISTICS @ Ta=-55deg.C to +125deg.C
(Unless Otherwise Specified)
Symbol
Parameter
Input Voltage Range
Transient Input Voltage
Output Voltage Initial
accuracy
Load Regulation
Line Regulation
Efficiency
Output ripple
Under-Voltage Lock-out
Under-Voltage Lock-out
Current Limit
Switching Frequency
Synch Frequency range
Synch pulse duty cycle
Synch pulse high level
Synch pulse low level
Enable Input (Note 1)
Test Conditions
Continuous
Tp< 50uS
Ta= 25 C
Vin= 28V
Vin= +28V, Iout= NL- FL
Vin: 18V to 40V
Vin= +28V, Pout= 30W
Vin=28V, Iout= FL
At Vin ramp-down
At Vin ramp-up
+5 V output
Synch pin open
200
20
5.0
1.6
5.0
200
250
80
200
20
5.0
1.6
5.0
1.0
1.0
89
30
12
15
12
200
250
80
50
1.5
8
1.0
1.0
87
30
12
15
18
50
SATD28S05
Min
18
Typ
28
Max
40
82
1.5
12
SATD28S3R3
Min
18
Typ
28
Max
40
82
Units
V
V
%
A
%
%
%
mV
V
V
A
Khz.
Khz.
%
V
V
V
Vin
Vout
VRload
VRline
Eff
Vor
UVLO
UVLO
Ilimit
Fsw
Fsynch
STd
STh
STl
Ven
Iout(max) Maximum Output Current
Riso
MTBF
Isolation
Input-Case, Output-Case
100
TBD
100
TBD
TBD
MΩ
Weight
TBD
g
Notes:
1. Enable pin should be pulled low when not in use.
SatCon Electronics
2
30W SATDH Preliminary Rev 2
Typical Performance Characteristics
Vo= +3.3V
90
89
88
87
86
85
84
83
0
1
2
3
4
5
6
7
8
9
10
11
Output Current (Amps)
Efficiency
Load Regulation (-55C to +125C) , Vin= 22V
3.4
3.38
3.36
Vout, V
3.34
3.32
3.3
3.28
3.26
0
2
4
Iout,A
6
8
10
T=-55C
T=+25C
T=105C
T=125C
Line Regulation (-55C to +25C), Iout= 5A
3.33
3.32
3.31
Vout,V
3.3
3.29
3.28
3.27
3.26
20
25
30
Vin,V
35
40
T=-55C
T=+25C
SatCon Electronics
3
30W SATDH Preliminary Rev 2
PACKAGE OUTLINE- Style 1
PIN DESCRIPTION
Pin
No
1
2
3
4
5
6
7
8
9
10
Pin Name Pin Description
+In
Out
Out
Out_RTN
Out_RTN
N/C
Case
Enable
Sync
Input_RTN
Input Voltage (+16- +40V)
Fixed Output Voltage: (+2.5V, +3.3V, +5.0V)
Fixed Output Voltage: (+2.5V, +3.3V, +5.0V)
Output Voltege Reference (Ground)
Output Voltege Reference (Ground)
Case connection
Enable Input Pin
Synch Input Pin
Input Voltage Reference
SatCon Electronics
4
30W SATDH Preliminary Rev 2
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