DVHF2800T Series
VPT Inc.
2801 Commerce Street
Blacksburg, VA 24060
Sales Info: (425) 337-2482 FAX: (603) 297-1160
WEB: http://www.vpt-inc.com
E-mail: mbosmann@worldnet.att.net
Description
Features
•
Very low output noise
•
High Reliability
•
Wide input voltage range : 15 to 50 Volts /
MIL-STD-704
•
Up to 15 Watts output power
•
Patented, fault tolerant feedback circuit
•
NO optoisolator
•
Undervoltage Lockout
•
Standard Pinout
•
High input transient volage : 80 Volts for 1 Sec
MIL-STD-704A
•
Radiation hardened version available
•
Precision sealed hermetic package
•
High power density, >27 W/in
3
•
Custom Versions Available
•
Environmental Screening Available
•
Meets MIL-STD-461C and MIL-STD-461D EMC
requirements when used with a DVMH28 EMI filter
The DVHF series of hybrid DC to DC converters is able
to operate at the full military (-55
°
to +125
°
C
C)
temperature range with no power derating. Unique to
the DVHF series is a PATENTED magnetic feedback
circuit that is fault tolerant and had no adverse affects
when exposed to radiation. Operating at a nominal fixed
frequency of 450kHz the regulated, isolated units utilize
well controlled undervoltage lock out circuitry to
eliminate slow start-up problems.
Block Diagram
1
DVHF2800T Series
Specifications
Absolute Maximum Ratings
Input Voltage (Continuous)
Input Voltage (Transient)
Output Power
Power Dissipation, Full Load, T
CASE
= +125°
C
Junction Temperature rise to case
Storage Temperature
Lead Solder Temperature for 10 seconds
Weight
Conditions
-55°
C≤T
C
≤125°
C,
V
IN
= 28 V
DC
±5%,
Full Load
1
Unless otherwise specified
50 Vdc
80 V (1sec)
15 Watts
6.5 Watts
+15°
C
-65° to +150°
C
C
270°
C
24 grams
T
case
= -55° to +125° V
in
= +28V
±5%,
Full Load unless otherwise specified
C
C,
DVHF28512T
Typ
Max
DVHF28515T
Typ
Max
Parameter
Static
INPUT
Voltage
Current
5
Ripple Current
Inhibit Pin Input
Inhibit Pin Open Cicuit Voltage
UVLO Turn On
UVLO Turn Off
OUTPUT
Voltage
1
V
MAIN
V
AUX+
V
AUX-
V
MAIN
V
AUX+
V
AUX-
Power
2,5
TOTAL
V
MAIN
V
AUX±
Current
2,5
V
MAIN
V
AUX±
Ripple Voltage
V
MAIN
V
AUX±
Line Regulation
V
MAIN
V
AUX±
Load Regulation
V
MAIN
V
AUX+
V
AUX-
Cross Regulation
3
EFFICIENCY
LOAD FAULT
POWER DISSIPATION
CAPACITIVE LOAD
SWITCHING FREQUENCY
ISOLATION
THERMAL RESISTANCE
MTBF
Table continued on next page.
Min
Min
Units
15
Inhibited
No Load
Full Load; 20Hz to 10MHz
0
9.0
11.50
11.00
Tcase = 25°
C
4.95
11.88
11.76
4.85
11.64
11.52
0
0
0
0
0
28
3.5
60
40
11.0
50
5
100
60
1.5
13.0
15.0
14.5
5.05
12.12
12.24
5.15
12.36
12.48
15
7.5
5.25
1.5
0.44
60
120
25
50
25
25
100
450
15
15
500
500
25
15
28
3.5
60
40
11.0
0
9.0
11.5
11.0
4.95
14.85
14.70
4.85
14.55
14.40
0
0
0
0
0
50
5
100
60
1.5
13.0
15.0
14.5
5.05
15.15
15.30
5.15
15.45
15.60
15
7.5
5.25
1.5
0.35
60
120
25
50
25
25
100
450
15
15
500
500
25
V
mA
mA
mA
P-P
V
V
V
V
V
V
V
V
V
V
W
W
W
A
A
mV
P-P
mV
P-P
mV
mV
mV
mV
mV
mV
%
W
W
µF
kHz
MΩ
°
C/W
kHrs
-55°
≤
Tcase
≤
+125°
C
C
5.00
12.0
12.0
5.00
12.0
12.0
5.00
15.0
15.0
5.00
15.0
15.0
Full Load
1
, 20Hz to 10MHz
Vin = 15V to 50V
No Load to Full Load
73
Overload
Short Circuit
400
100
Case to Ambient (θ
CA
)
MIL-HDBK-217F,
AIF@Tc=55°C
40
60
10
15
5
5
20
350
77
73
40
60
10
15
5
5
20
350
77
450
400
100
450
350
350
2
DVHF2800T Series
Specifications
T
case
= -55° to +125° V
in
= +28V
±5%,
Full Load
1
unless otherwise specified
C
C,
Conditions
-55°
C≤T
C
≤125°
C,
V
IN
= 28 V
DC
±5%,
Full Load
1
Unless otherwise specified
Parameter
Dynamic
LOAD STEP
Output Transient
Recovery
4
LINE STEP
Output Transient
Recovery
4
TURN ON
Delay
4
Overshoot
Min
DVHF28512T
Typ
Max
200
450
200
350
300
200
300
200
10
0
10
0
400
600
400
500
500
400
600
400
15
50
15
120
Min
DVHF28515T
Typ
Max
200
450
200
350
300
200
300
200
10
0
10
0
400
600
400
500
500
400
600
400
15
50
15
150
Units
mV
PK
µsec
mV
PK
µsec
mV
PK
µsec
mV
PK
µsec
msec
mV
PK
msec
mV
PK
V
MAIN
V
AUX±
V
MAIN
V
AUX±
V
MAIN
V
AUX±
Half Load to Full Load
Vin = 15V to 50V
Vin = 0V to 28V
NOTES:
1. Main output power is 7.5W, each auxiliary output power is 3.75W.
2. Total main output power is 7.5W. Total auxiliary output power is 7.5W and up to 70% can be drawn from any one of the two auxiliary outputs.
3. Vaux+ at 30% load and Vaux- at 70% full load.
4. Time for output voltage to settle within 1% of its nominal value.
5. Derate linearly to 0 at 135°C.
3
DVHF2800T Series
Efficiency vs. Output Power
15V IN
85
80
75
70
65
60
55
4
8
12
Output Power (W)
16
18
28V IN
50V IN
Efficiency vs. Load,
DVHF2812T
Figure 3
Efficiency vs. Output Power
15V IN
85
80
75
70
65
60
55
4
8
12
Output Power (W)
Efficiency vs. Load, DVHF2815T
Figure 4
28V IN
50V IN
Efficiency (%)
16
18
5
Real-time operating system RTOS
京公网安备 11010802033920号
EEWORLD
