SMFLHP2812D/KR [CRANE]
DC/DC CONVERTERS 28 VOLT INPUT; DC / DC转换器， 28伏特的输入
| 型号： | SMFLHP2812D/KR |
| 厂家： | 
Crane Aerospace & Electronics. |
| 描述： | DC/DC CONVERTERS 28 VOLT INPUT |
| 文件： | 总6页 (文件大小：259K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
FEATURES
SMFLHP SERIES
100 WATT
DC/DC CONVERTERS
28 VOLT INPUT
• Fully qualified to Class H or K
• –55° to +125°C operation
• 19 to 40 VDC input
• Fully Isolated
• Magnetic feedback
MODELS
• Fixed frequency, 600 kHz typical
• Topology – Single Ended Forward
• Inhibit function – input and output
• Sync function
VDC OUTPUT
SINGLE
DUAL
±5
±12
±15
3.3
5
12
15
• Output trim on single output models
• Indefinite short circuit protection
• Remote sense on single output models
• Up to 87% efficiency
• Parallelable up to 270 watts
Size (max.): 3.005 x 1.505 x 0.400 inches (76.33 x 38.23 x 10.16 mm)
See cases “U maximum dimensions” and “U” for dimensions.
Weight:
86 grams maximum
Screening: Space Prototype, Class H, or Class K
Radiation hardness levels O or R
See “QA Screening: Class H and K, QML” for more information.
Available configurations: OO, HO, HR, KR
DESCRIPTION
The SMFLHP Series™ 28 volt DC/DC converters are rated up to
100 watts output power over a –55° to +125°C temperature range
with a 28 Vdc nominal input. On dual output models, up to 70% of
the rated output power can be drawn from either the positive or
negative outputs. Current sharing allows the units to be paralleled
for total power of up to 270 watts. The welded, hermetically sealed
package is only 3.005 x 1.505 x 0.400 inches, giving the series an
overall power density of up to 67 watts per cubic inch.
INHIBIT
The SMFLHP Series converters have two TTL compatible inhibit
terminals (INH1 and INH2) that can be used to disable power
conversion, resulting in a very low quiescent input current. An open
collector TTL compatible low (<0.8 volts) is required between INH1
(pin 4) and Input Common (pin 2) to inhibit the converter. An open
collector TTL compatible low (<0.5 volts) is required between INH2
(pin 12) and Output Common (pin 8) to inhibit the converter. The
application of intermediate voltages to these pins (1.5 to 10.5 volts)
should be avoided.
SCREENING
SMFLHP converters offer screening options to Space Prototype (O),
Class H, or Class K. Available radiation hardness (RHA) levels are
O or R. See “QA Screening: Class H and K, QML” for more infor-
mation.
CURRENT SHARING AND PARALLEL OPERATION
Multiple SMFLHP converters may be used in parallel to drive a
common load (see Figure 2). In this mode of operation the load
current is shared by two or three SMFLHP converters. In current
sharing mode, one SMFLHP converter is designated as a master.
The SLAVE pin (pin 11) of the master is left unconnected and the
MSTR/INH2 pin (pin 12) of the master is connected to the SLAVE
pin (pin 11) of the slave units. The units designated as slaves have
the MSTR/INH2 pin (pin 12) connected to the SNS RTN pin (pin 9).
Figure 2 shows the typical setup for two or three units in parallel.
Note that synchronizing the units together (though shown in the
figure) is not required for current sharing operation. A second slave
unit may be placed in parallel with a master and slave; this requires
the TRI pin (pin 3) of the master unit to be connected to the SNS
RTN pin (pin 9).
DESIGN FEATURES
The SMFLHP Series converters are switching regulators that use a
quasi-square wave, single ended forward converter design with a
constant switching frequency of 600 kHz.
Isolation between input and output circuits is provided with a trans-
former in the forward path and wide bandwidth magnetic coupling in
the feedback control loop. The SMFLHP Series uses a unique dual
loop feedback technique that controls output current with an inner
feedback loop and output voltage with a cascaded voltage mode
feedback loop.
When paralleled, 90% of the total combined power ratings of the
SMFLHP converters are available at the load. Overload and short
circuit performance are not adversely affected during parallel
operation.
The additional secondary current mode feedback loop improves
transient response in a manner similar to primary current mode
control and allows for ease of paralleling.
Tight load regulation is achieved through a wide-bandwidth
magnetic feedback circuit. The output voltage on single SMFLHP
models can be easily trimmed by adding an external resistor. (See
Figure 1 for voltage changes with different resistor values.)
Contact Information
Interpoint, a Crane Co. Company
PO Box 97005 • Redmond WA 98073-9705
425-895-4053 • electronics@craneae.com
www.craneae.com/power
SMFLHP SERIES
100 WATT
DC/DC CONVERTERS
ABSOLUTE MAXIMUM RATINGS
Input Voltage
TYPICAL CHARACTERISTICS
Output Voltage Temperature Coefficient
• 100 ppm/°C typical
Input to Output Capacitance
• 150 pF typical
Isolation
• 100 megohm minimum at 500 V
Audio Rejection
• 50 dB typical
Conversion Frequency
• Free run mode 600 kHz typical
550 kHz min, 650 kHz. max
• External sync range 525 to 675 kHz
Inhibit Pin Voltage (unit enabled)
• INH1 = 9 to12 V, INH2 = 6 to 9 V
SYNC IN AND INHIBIT (INH1, INH2)
Sync In (525 to 675 kHz)
• Duty cycle 40% min, 60% max
• Logic low 0.8 V max
• 0 to 40 VDC
Power Dissipation (Pd)
• 20 watts
• Logic high 4.5 V min
Output Power
• Referenced to input common
• If not used, connect to input common
Sync Out - Referenced to input common
Inhibit (INH1, INH2) TTL Open Collector
• Logic low (output disabled)
Current –10 to –5 mA
• 80 to 100 watts depending on model
Lead Soldering Temperature (10 sec per lead)
• 300°C
Storage Temperature Range (Case)
• –65°C to +150°C
INH1 referenced to input common
Logic low 0.8 V max
INH2 referenced to output common
Logic low 0.5 V max
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range
• 19 to 40 VDC continuous
• 50 V for 50 msec transient
• Logic high (output enabled)
Open collector
Case Operating Temperature (Tc)
• –55 to +125°C full power
• –55 to +135°C absolute
PINS NOT IN USE
TR1
No connection
Inhibit (INH1)
Sync Out
No connection
No connection
Derating Output Power/Current
• Linearly from 100% at 125°C to 0% at 135°C
Sync In
Sense Lines
Connect to output common
Must be connected to
appropriate outputs
No connection
Slave
MSTR (INH 2)
No connection
Electrical Characteristics: –55°C to +125°C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
SINGLE OUTPUT MODELS
SMFLHP283R3S
SMFLHP2805S
SMFLHP2812S
SMFLHP2815S
PARAMETER
CONDITION
25°C
MIN TYP MAX
MIN TYP MAX
MIN TYP MAX
MIN TYP MAX
UNITS
VDC
A
OUTPUT VOLTAGE
3.26 3.3 3.34
4.95 5.00 5.05
11.88 12.00 12.12
14.8515.00 15.15
OUTPUT CURRENT
OUTPUT POWER
V
= 19 to 40 VDC
= 19 to 40 VDC
0
0
—
—
18
60
0
0
—
—
16
80
0
0
—
—
7.5
90
0
0
—
—
6.67
100
IN
IN
V
W
OUTPUT RIPPLE
Tc = 25°C
—
—
—
10
20
0
45
80
50
—
—
—
15
30
0
50
90
50
—
—
—
30
45
0
85
150
50
—
—
—
30
45
0
95
175
50
mV p-p
mV
VOLTAGE 10 k - 2 MHz Tc = –55°C to +125°C
LINE REGULATION
V
= 19 to 40 VDC
IN
LOAD REGULATION
INPUT VOLTAGE
NO LOAD TO FULL
CONTINUOUS
—
19
—
0
20
40
50
—
19
—
0
20
40
50
—
19
—
0
20
40
50
—
0
20
40
50
mV
VDC
V
28
—
28
—
28
—
19 28
1
NO LOAD TO FULL
TRANSIENT 50 ms
—
—
INPUT CURRENT
NO LOAD
—
—
—
—
70
2.9
9
120
3.1
15
—
—
—
—
70
120
—
—
—
—
50
80
—
—
—
—
50
80
mA
A
FULL LOAD
3.6 3.73
3.8 3.95
4.2 4.40
INHIBITED - INH1
INHIBITED - INH2
9
15
80
9
15
80
9
15
80
mA
35
80
35
35
35
INPUT RIPPLE
CURRENT
10 kHz - 10 MHz
Tc = 25°C
—
30
72
80
—
—
30
80
80
—
—
30
86
80
—
—
30
80
—
mA pp
%
EFFICIENCY
70
77
81
82 87
LOAD FAULT
Tc = 25°C
POWER DISSIPATION
SHORT CIRCUIT
—
—
15
20
4
—
—
15
20
4
—
—
15
20
4
—
—
15
20
4
W
RECOVERY
1.5
1.5
1.5
1.5
ms
STEP LOAD RESP.
STEP LINE RESP.
50% – 100% – 50%
TRANSIENT
—
—
350 450
1.5 3.0
—
—
350 450
1.5 3.0
—
—
450 700
1.5 3.0
—
—
450 700
1.5 3.0
mV pk
ms
2
RECOVERY
19 – 40 – 19 VDC
3
TRANSIENT
—
—
250 400
200 600
—
—
250 400
200 600
—
—
250 400
200 600
—
—
250 400
200 600
mV pk
µs
2
RECOVERY
START-UP
Notes
DELAY
—
—
3.5
0
10
25
—
—
3.5
0
10
25
—
—
3.5
0
10
50
—
—
3.5
0
10
50
ms
OVERSHOOT
mV pk
1. Unit will shut down above approximately 45V but will be undamaged and
will restart when voltage drops into normal range.
2. Recovery time is measured from application of the transient to point at
which Vout is within 1% of final value.
3. Transition time >10 µs.
SMFLHP SERIES
100 WATT
DC/DC CONVERTERS
Electrical Characteristics: –55°C to +125°C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
DUAL OUTPUT MODELS
PARAMETER
OUTPUT VOLTAGE
Tc = 25°C
SMFLHP2805D
MIN TYP MAX
4.95 5.00 5.05
4.92 5.00 5.08
SMFLHP2812D
MIN TYP MAX
11.88 12.00 12.12 14.85 15.00 15.15
11.82 12.00 12.18 14.77 15.00 15.23
SMFLHP2815D
MIN TYP MAX
CONDITIONS
+V
UNITS
OUT
OUT
VDC
–V
1
OUTPUT CURRENT
EACH OUTPUT
0
0
0
0
—
—
—
—
11.2
16.0
56
0
0
0
0
—
—
—
—
5.3
7.5
63
0
0
0
0
—
—
—
—
4.67
6.67
70
A
V
= 19 TO 40 VDC
1
TOTAL
IN
OUTPUT POWER
EACH OUTPUT
W
V
= 19 TO 40 VDC
TOTAL
80
90
100
IN
OUTPUT RIPPLE
VOLTAGE
10 kHz - 2 MHz
+V
–V
+V
–V
—
—
—
—
25
25
0
150
150
50
—
—
—
—
50
50
0
175
175
50
—
—
—
—
50
50
0
225
225
50
OUT
OUT
OUT
OUT
mV p-p
mV
LINE REGULATION
V
= 19 TO 40 VDC
25
100
25
100
25
100
IN
LOAD REGULATION
NO LOAD TO FULL
+V
–V
—
—
0
50
—
—
10
50
100
200
—
—
10
50
100
200
OUT
OUT
mV
25
100
INPUT VOLTAGE
NO LOAD TO FULL
INPUT CURRENT
Tc = 25°C
CONTINUOUS
2
19
0
28
—
50
3.6
9
40
50
19
0
28
—
50
3.8
9
40
50
19
0
28
—
40
50
VDC
V
TRANSIENT 50 ms
NO LOAD
—
—
—
—
120
—
—
—
—
120
—
—
—
—
550
4.2
9
120
mA
A
FULL LOAD
INHIBITED - INH1
INHIBITED - INH2
14
80
14
80
14
80
mA
35
35
35
INPUT RIPPLE
CURRENT
10 kHz - 10 MHz
BALANCED LOAD
POWER DISSIPATION
SHORT CIRCUIT
RECOVERY
—
30
80
80
—
—
30
86
80
—
—
30
87
80
—
mA p-p
%
EFFICIENCY 25°C Tc
LOAD FAULT
Tc = 25°C
75
81
82
—
—
15
20
—
—
15
20
—
—
15
20
W
1.5
4.0
1.5
4.0
1.5
4.0
ms
STEP LOAD
50 %–100%– 50% LOAD
TRANSIENT
RESPONSE ± V
OUT
—
—
350
1.5
450
3.0
—
—
450
1.5
700
3.0
—
—
450
1.5
700
3.0
mV pk
ms
3
RECOVERY
STEP LINE
19 – 40 – 16 V
IN
TRANSIENT
4
RESPONSE ± V
OUT
—
250
600
—
250
600
—
250
600
mV pk
3
RECOVERY
—
—
200
3.5
300
20
—
—
200
3.5
300
20
—
—
200
3.5
300
20
µs
START–UP
DELAY
ms
OVERSHOOT
—
0
25
—
0
50
—
0
50
mV p
Notes
1. Up to 70% of the total output power (current) is available from either output
provided the opposite output is carrying 30% of the power (current) in use.
2. Unit will shut down above approximately 45V but will be undamaged and
will restart when voltage drops into normal range.
3. Recovery time is measured from application of the transient to point at
which Vout is within 1% of final value.
4. Transition time >10 µs.
SMFLHP SERIES
100 WATT
DC/DC CONVERTERS
SINGLE OUTPUT MODELS CONNECTION DIAGRAMS - SENSE AND PARALLEL
12
11
10
9
1
2
3
4
5
6
Positive Input
Input Common
TR1
MSTR/INH2
Slave
+
–
28V
Pos. Sense
INH1
Sense Return
Output Common
Positive Output
Inhibit
–
+
8
Sync Out
Sync In
7
Sync In
R
L
REMOTE SENSE CONNECTION
12
11
10
9
1
2
3
4
5
6
Positive Input
MSTR/INH2
Slave
+
–
28V
Input Common
TR1
RA
Pos. Sense
Inhibit
INH1
Sense Return
Output Common
Positive Output
–
+
8
Sync Out
Sync In
7
Sync In
R
L
OUTPUT VOLTAGE ADJUST CONNECTION
RA (OHMS)
VOUT INCREASE
5–V
70
(VOLT)
0.1
12–V 15–V
25
20
0.2
0.3
0.4
0.5
140
210
280
350
50
40
75
60
100
125
80
100
FIGURE 1: SENSE CONNECTIONS AND TRIM TABLE
12
11
10
9
1
2
3
4
5
6
Positive Input
Input Common
TR1
MSTR/INH2
Slave
+
–
28V
Pos. Sense
MASTER
Inhibit
INH1
Sense Return
Output Common
Positive Output
–
+
8
Sync Out
Sync In
7
Sync In
R
L
CONNECT ONLY WHEN 2 SLAVES ARE USED
12
11
10
9
1
2
3
4
5
6
Positive Input
Input Common
TR1
MSTR/INH2
Slave
Pos. Sense
SLAVE 1
INH1
Sense Return
Output Common
Positive Output
8
Sync Out
Sync In
7
1
2
3
4
5
6
12
11
10
9
Positive Input
Input Common
TR1
MSTR/INH2
Slave
Pos. Sense
SLAVE 2
INH1
Sense Return
Output Common
Positive Output
8
Sync Out
Sync In
7
FIGURE 2: PARALLEL CONNECTIONS
SMFLHP SERIES
100 WATT
DC/DC CONVERTERS
PIN OUT
Pin
1
Single Output
Positive Input
Input Common
Triple (TRI)
Dual Output
Angled corner indicates pin one.
Positive Input
Input Common
Triple (TRI)
Inhibit 1 (INH1)
Sync Out
2
3
4
Inhibit 1 (INH1)
Sync Out
1
2
3
4
5
6
12
11
10
9
5
6
Sync In
Sync In
TOP VIEW
SMFLHP
(Pin side, marked side)
7
Positive Output
Positive Output
8
Output Common Output Common
9
Sense Return
Positive Sense
Slave
Negative Output
No connection
Slave
8
10
11
12
7
Master / Inhibit 2 Master / Inhibit 2
(MSTR/INH2) (MSTR/INH2)
See cases “U maximum dimensions” and “U” for dimensions.
FIGURE 3: PIN OUT
MODEL NUMBERING KEY
SMFLHP 28 05 S /
K
R
Base Model
Input Voltage
Output Voltage
Number of Outputs
(S = single, D = dual)
Screening
Radiation Level
Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified.
90
85
80
75
70
65
60
90
85
90
85
80
19V
19V
19V
28V
28V
80
75
70
28V
40V
75
70
65
60
40V
40V
65
60
10
30
50
70
90 100
10
30
50
70
90
10
30
50
70
90
Output (Watts)
Output Power (Watts)
Output Power (Watts)
SMFLHP2805S & SMFLHP2805D
Efficiency
SMFLHP2815S & SMFLHP2815D
Efficiency
SMFLHP2812S & SMFLHP2812D
Efficiency
FIGURE 4
FIGURE 5
FIGURE 6
SMFLHP SERIES
100 WATT
DC/DC CONVERTERS
Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified.
0.
20.
100% to 50%
Vout
40.
60.
80.
50% to 100%
Vin
100.
0.1
1
10
100
1ms/div
50 µs/div
19 to 40 V
Frequency (kHz)
SMFLHP2805S Step Load Response
SMFLHP Series Audio Rejection
SMFLHP2805S Step Line Response
FIGURE 7
FIGURE 8
FIGURE 9
50% to 100%
Vin
Vin
+Vout
Vout
100% to 50%
–Vout
1ms/div
1ms/div
No Load
50 µs/div
19 to 40 V
SMFLHP2815D Step Load Response
SMFLHP2805S Turn On Response
SMFLHP2815D Step Line Response
FIGURE 10
FIGURE 11
FIGURE 12
8
19
6
SMFLHP2805S & 5D
SMFLHP2805D
V
IN
+Vout
4
18
2
SMFLHP2812D
SMFLHP2815S
& 15D
0
– 2
– 4
SMFLHP2815D
17
–Vout
– 6
– 8
SMFLHP2812S & 12D
1ms/div
No Load
16
30
40
50
60
70
30 40 50 60 70 80 90 100
Output Load (%)
Output Power (Watts)
Low Line Dropout
SMFLHP2815D Turn On Response
+Pout 70 to 30 %, –Pout 30 to 70%
Cross Regulation
FIGURE 14
FIGURE 15
FIGURE 13
SMFLHP Rev G (input ripple - error) October 6, 2005. This revision supercedes all previous releases. All
technical information is believed to be accurate, but no responsibility is assumed for errors or omissions.
Interpoint reserves the right to make changes in products or specifications without notice. SMFLHP Series
is a trademark of Interpoint. Copyright © 1999-2005 Interpoint. All rights reserved.
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