4707 Dey Road Liverpool, N.Y. 13088
(315) 701-6751
All Ceramic Capacitors
Surface Mount Magnetics
MIL STD 461C CR03 (DC-DC Converters)
80 Volt Input Transient Tolerent
Wide Supply Range - 16V to 50V
High Isolation - 500V
High Power Density - 17W/in
Output Voltage Adjustment - Standard
Remote Shutdown
Operates to 14V Input at 10W
Available with 3.3V, 5V, 12V and 15V Outputs
MIL-PRF-38534 CERTIFIED
ISO-9001 CERTIFIED BY DSCC
M.S.KENNEDY CORP.
20W
DC-DC
CONVERTERS
BBF2800S
DESCRIPTION:
The BBF2800S series of DC-DC converters provides the ruggedness, reliability and features required to
meet the advanced design challenges of today's hi-rel market. This
has been accomplished using a package
having very low thermal gradients, excellent hermeticity and high voltage isolation. The use of advanced substrate
and reflow soldering techniques during construction results in a rugged, cost-effective pin solderable package.
The BBF2800S hybrid converter series utilizes all ceramic capacitors and surface mount magnetics to provide
reliable operation at all operating temperatures while surviving very high G forces.
BBF2800S series standard features include kelvin sense, indefinite short circuit protection, remote shutdown,
output fault monitoring, turn on voltage point adjustment, switching frequency synchronization of up to 3 units using
no external components and pi-network input filtering. An output voltage adjustment/load compensation pin is also
standard.
Fault tolerance design protects these converters from most external circuit faults. The output and output adjust
pins will withstand +35V while the shutdown and all synchronization pins will withstand +50V protecting the
converters from a variety of system or board faults, i.e. solder bridges, etc. Unique load fault protection circuitry
allows this converter to pull up loads having difficult static load line characteristics and allows short term load
excursions significantly beyond ratings in most applications.
The BBF2800 series is a current mode push-pull topology converter which operates at a switching frequency of
500KHz. Internal filtering of both input and output eliminates the need for external capacitors in many applications.
The 12-pin power dip package allows connection to a heatsink and is hermetically sealed and isolated from the
internal circuits.
Rev. E 12/04
1
SERIES
FEATURES:
NOTES:
Continuous operation above the absolute maximum ratings may adversly effect the device performance and/or life cycle.
EQUIVALENT SCHEMATIC
Isolated Step Down Power Supply
Microprocessor Power Source
Low Voltage Subsystem Power Source
TYPICAL APPLICATIONS
1
2
3
4
5
6
+Input
Shutdown Plus
Clock
Adjust/Comp
-Output
+Output
PIN-OUT INFORMATION
-Input
Timing 2
Timing 1
Case
-Sense
+Sense
12
11
10
9
8
7
-65C to +150C
300C
See Efficiency Curve
150C
6.5C/W
ABSOLUTE MAXIMUM RATINGS
+50V
80V
5.5A
4.0A
1.9A
1.5A
-55C to +125C
-40C to +85C
Input Voltage (pin 7 to pin 6)
Input Transient (pin 7 to pin 6 @ 50mS)
Output Current
BBF2803S
BBF2805S
BBF2812S
BBF2815S
Case Temperature Range
BBF2800S H/E
BBF2800S
V
IN
V
INT
I
OUT
T
C
Storage Temperature Range
Lead Temperature Range
(10 Seconds)
Power Dissipation
Junction Temperature
Thermal Resistance
(Switches)
T
ST
T
LD
P
D
T
J
JC
Rev. E 12/04
2
1
1
I
OUT
=2.75A to/from 5.50A
Transition TIme=30S
I
OUT
=2.75A to/from 5.50A
Transition TIme=30S
V
IN
=16V to/from 40V
Transition Time=30S
V
IN
=16V to/from 40V
Transition Time=30S
P
OUT
=18W MAX.
Disabled I
OUT
=0mA
No Effect on DC Performance
Input to output or any pin to case @ 500V
R
POT
=50K
16V
V
IN
40V
BW=10KHz to 2MHz
BW=10KHz to 2MHz
V
IN
=16V to 40V
I
OUT
=0.5A to 5.5A
I
OUT
=5.5A
I
OUT
=5.5A
Enabled, I
OUT
=0mA
Capacitive Load
Isolation
Short Circuit Current Limit
Switching Frequency
VOUT Adjustment Range
ELECTRICAL SPECIFICATIONS
VDC
VDC
mA
mA
mVrms
mVrms
mArms
mArms
mV
mV
mV
mV
%
%
mV
mV
S
S
mV
mV
S
S
mV
mV
mS
mS
S
S
mS
V
mA
mA
mA
F
M
A
KHz
%
Min.
3.20
3.15
500
500
-
-
-
-
-
-
-
-
61
58
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
16
-
-
-
-
100
5.5
475
10
Output Voltage
Output Voltage Ripple
Input Current Ripple
Line Regulation
Load Regulation
Efficiency
Step Load Response
Step Load Recovery
Step Line Response
Step Line Recovery
Start Up Overshoot
Start Up Delay
Shutdown Delay
Parameter
Test Conditions
1
Max.
3.40
3.45
5500
5500
50
60
50
60
20
50
15
40
-
-
600
800
200
300
750
1000
200
300
300
500
60
100
500
550
60
40
40
50
2.5
300
-
8.5
525
-
BBF2803S
BBF2803S H/E
Input Voltage Range
Output Current
Units
Typ.
3.30
-
-
-
20
-
20
-
2
-
1
-
66
-
400
-
100
-
500
-
80
-
0
-
30
-
120
-
20
-
35
-
1.25
-
-
7.8
500
-
Group A
Subgroup
1
2,3
1
2,3
1
2,3
1
2,3
1
2,3
1
2,3
1
2,3
4
5,6
4
5,6
4
5,6
4
5,6
4
5,6
4
5,6
4
5,6
-
1,2,3
1
2,3
1,2,3
1,2,3
1
1
4
1
7
2
Min.
3.18
-
500
-
-
-
-
-
-
-
-
-
61
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
16
-
-
-
-
100
5.5
475
10
Max.
3.42
-
5500
-
60
-
60
-
25
-
20
-
-
-
700
-
220
-
800
-
220
-
300
-
60
100
500
-
60
40
40
-
2.5
300
-
8.5
525
-
Typ.
3.30
-
-
-
20
-
20
-
2
-
1
-
66
-
400
-
100
-
500
-
80
-
0
-
30
-
120
-
20
-
35
-
1.25
-
-
7.8
500
-
Rev. E 12/04
3
Shutdown Recovery
Quiescent Current
2
2
2
2
2
2
BBF2803S
1
2
3
4
5
6
7
8
+V
IN
= 28V, I
OUT
= 5.5A, T
A
=T
C
=25C unless otherwise specified.
Guaranteed by design but not tested. Typical parameters are representative of actual device performance but are for reference only.
Industrial grade and "E" suffix devices shall be tested to subgroups 1 and 4 unless otherwise specified.
Military grade devices ("H" suffix) shall be 100% tested to subgroups 1, 2, 3 and 4.
Subgroups 5 and 6 testing available upon request.
Subgroup 1, 4 T
A
=T
C
=+25C
2, 5 T
A
=T
C
=+125C
3, 6 T
A
=T
C
= -55C
Device has internal shutdown feature that pulses the output with a low duty cycle during faults.
At case temperatures above 90C, the BBF2803 requires VIN>16V to support a 5.5A load. At 125C, 18V input is required
to support 5.5A output; 16V will support 4A output at 125C.
NOTES:
2
8
2
2
2
I
OUT
=2A to/from 4A
Transition TIme=30S
I
OUT
=2A to/from 4A
Transition TIme=30S
V
IN
=16V to/from 40V
Transition Time=30S
V
IN
=16V to/from 40V
Transition Time=30S
P
OUT
=20W MAX.
Disabled I
OUT
=0mA
No Effect on DC Performance
Input to output or any pin to case @ 500V
R
POT
=50K
16V
V
IN
40V
BW=10KHz to 2MHz
BW=10KHz to 2MHz
V
IN
=16V to 40V
I
OUT
=0.4A to 4.0A
I
OUT
=4.0A
I
OUT
=4.0A
Enabled, I
OUT
=0mA
Capacitive Load
Isolation
Short Circuit Current Limit
Switching Frequency
VOUT Adjustment Range
ELECTRICAL SPECIFICATIONS
VDC
VDC
mA
mA
mVrms
mVrms
mArms
mArms
mV
mV
mV
mV
%
%
mV
mV
S
S
mV
mV
S
S
mV
mV
mS
mS
S
S
mS
V
mA
mA
mA
F
M
A
KHz
%
Min.
5.00
4.90
400
400
-
-
-
-
-
-
-
-
65
61
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
16
-
-
-
-
100
4.0
475
10
Output Voltage
Output Voltage Ripple
Input Current Ripple
Line Regulation
Load Regulation
Efficiency
Step Load Response
Step Load Recovery
Step Line Response
Step Line Recovery
Start Up Overshoot
Start Up Delay
Shutdown Delay
Parameter
Test Conditions
1
Max.
5.10
5.20
4000
4000
50
60
50
60
25
50
25
50
-
-
1000
1500
200
300
800
1100
200
300
400
600
60
100
500
550
60
40
40
50
2.5
300
-
7.0
525
-
BBF2805S
BBF2805S H/E
Input Voltage Range
Output Current
Units
Typ.
5.05
-
-
-
20
-
20
-
5
-
2
-
72
-
700
-
100
-
500
-
80
-
0
-
30
-
120
-
20
-
35
-
1.25
-
-
6.0
500
-
Group A
Subgroup
1
2,3
1
2,3
1
2,3
1
2,3
1
2,3
1
2,3
1
2,3
4
5,6
4
5,6
4
5,6
4
5,6
4
5,6
4
5,6
4
5,6
-
1,2,3
1
2,3
1,2,3
1,2,3
1
1
4
1
7
2
Min.
4.95
-
400
-
-
-
-
-
-
-
-
-
65
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
16
-
-
-
-
100
4.0
475
10
Max.
5.15
-
4000
-
60
-
60
-
50
-
50
-
-
-
1200
-
220
-
900
-
220
-
400
-
60
100
500
-
60
40
40
-
2.5
300
-
7.0
525
-
Typ.
5.05
-
-
-
20
-
20
-
5
-
2
-
72
-
700
-
100
-
500
-
80
-
0
-
30
-
120
-
20
-
35
-
1.25
-
-
6.0
500
-
Rev. E 12/04
4
Shutdown Recovery
Quiescent Current
2
2
2
2
2
2
BBF2805S
1
2
3
4
5
6
7
+V
IN
= 28V, I
OUT
= 4.0A, T
A
=T
C
=25C unless otherwise specified.
Guaranteed by design but not tested. Typical parameters are representative of actual device performance but are for reference only.
Industrial grade and "E" suffix devices shall be tested to subgroups 1 and 4 unless otherwise specified.
Military grade devices ("H" suffix) shall be 100% tested to subgroups 1, 2, 3 and 4.
Subgroups 5 and 6 testing available upon request.
Subgroup 1, 4 T
A
=T
C
=+25C
2, 5 T
A
=T
C
=+125C
3, 6 T
A
=T
C
= -55C
Device has internal shutdown feature that pulses the output with a low duty cycle during faults.
NOTES:
2
2
2
2
I
OUT
=0.95A to/from 1.9A
Transition TIme=30S
I
OUT
=0.95A to/from 1.9A
Transition TIme=30S
V
IN
=16V to/from 40V
Transition Time=30S
V
IN
=16V to/from 40V
Transition Time=30S
P
OUT
=22.8W MAX.
Disabled I
OUT
=0mA
No Effect on DC Performance
Input to output or any pin to case @ 500V
R
POT
=50K
16V
V
IN
40V
BW=10KHz to 2MHz
BW=10KHz to 2MHz
V
IN
=16V to 40V
I
OUT
=0.19A to 1.9A
I
OUT
=1.9A
I
OUT
=1.9A
Enabled, I
OUT
=0mA
Capacitive Load
Isolation
Short Circuit Current Limit
Switching Frequency
VOUT Adjustment Range
ELECTRICAL SPECIFICATIONS
VDC
VDC
mA
mA
mVrms
mVrms
mArms
mArms
mV
mV
mV
mV
%
%
mV
mV
S
S
mV
mV
S
S
mV
mV
mS
mS
S
S
mS
V
mA
mA
mA
F
M
A
KHz
%
Min.
12.00
11.80
190
190
-
-
-
-
-
-
-
-
67
60
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
16
-
-
-
-
100
1.9
475
10
Output Voltage
Output Voltage Ripple
Input Current Ripple
Line Regulation
Load Regulation
Efficiency
Step Load Response
Step Load Recovery
Step Line Response
Step Line Recovery
Start Up Overshoot
Start Up Delay
Shutdown Delay
Parameter
Test Conditions
1
Max.
12.10
12.30
1900
1800
50
60
40
50
50
100
50
100
-
-
1200
1600
200
300
500
800
200
300
400
800
60
100
500
550
60
40
40
50
2.5
300
-
3.4
525
-
BBF2812S
BBF2812S H/E
Input Voltage Range
Output Current
Units
Typ.
12.05
-
-
-
25
-
20
-
5
-
5
-
74
-
700
-
100
-
300
-
70
-
0
-
20
-
120
-
20
-
35
-
1.25
-
-
2.8
500
-
Group A
Subgroup
1
2,3
1
2,3
1
2,3
1
2,3
1
2,3
1
2,3
1
2,3
4
5,6
4
5,6
4
5,6
4
5,6
4
5,6
4
5,6
4
5,6
-
1,2,3
1
2,3
1,2,3
1,2,3
1
1
4
1
7
2
Min.
11.95
-
190
-
-
-
-
-
-
-
-
-
67
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
16
-
-
-
-
100
1.9
475
10
Max.
12.15
-
1900
-
60
-
40
-
60
-
60
-
-
-
1400
-
220
-
550
-
220
-
500
-
60
-
500
-
60
40
40
-
2.5
300
-
3.4
525
-
Typ.
12.05
-
-
-
25
-
20
-
5
-
5
-
74
-
700
-
100
-
300
-
70
-
0
-
20
-
120
-
20
-
35
-
1.25
-
-
2.8
500
-
Rev. E 12/04
5
Shutdown Recovery
Quiescent Current
2
2
2
2
2
2
BBF2812S
1
2
3
4
5
6
7
+V
IN
= 28V, I
OUT
= 1.9A, T
A
=T
C
=25C unless otherwise specified.
Guaranteed by design but not tested. Typical parameters are representative of actual device performance but are for reference only.
Industrial grade and "E" suffix devices shall be tested to subgroups 1 and 4 unless otherwise specified.
Military grade devices ("H" suffix) shall be 100% tested to subgroups 1, 2, 3 and 4.
Subgroups 5 and 6 testing available upon request.
Subgroup 1, 4 T
A
=T
C
=+25C
2, 5 T
A
=T
C
=+125C
3, 6 T
A
=T
C
= -55C
Device has internal shutdown feature that pulses the output with a low duty cycle during faults.
NOTES:
2
2
2
2
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