48T5.15XC [ETC]
DC to DC Converter ; 直流到直流转换器\n
| 型号： | 48T5.15XC |
| 厂家： | 
ETC |
| 描述： | DC to DC Converter
|
| 文件： | 总6页 (文件大小：227K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
25 to 30 Watt XC Triple Series DC/DC Converters
Features
!
Single and Dual Output Sections Isolated
from each Other and Independently Regulated
!
Overall Output Accuracy up to 10:1 Better than
Competitive Products
!
Standby Current Less than 0.5 mA for Low Power
Pulsed Battery Operation
!
Fully Filtered and Specified; Very Low Noise Inputs
and Outputs
!
PCB Mounting with Optional Heat Sink and Chassis
Mounting Kit
!
Industrial Operating Temperature Range Standard,
-40 to 85°C
!
Five Year Warranty
Description
Selection Chart
The 25-30 Watt Triple Series opens up new application areas
in high efficiency DC/DC conversion. The unique dual control
loop output design allows for independent regulation of both
the single and dual outputs. This increases the total output
accuracy by up to 10:1 over competitive designs. The design
also eliminates cross regulation from the +5 section to the
dual outputs. The 25-30 Watt Triple Series runs at 80-85%
efficiency.
Input Range
VDC
Outputs
VDC
Outputs
mA
Model
Min
Max
12T5.12XC
12T5.15XC
24T5.12XC
24T5.15XC
48T5.12XC
48T5.15XC
10.0
10.0
18.0
18.0
36.0
36.0
20.0
20.0
36.0
36.0
72.0
72.0
5, ±12
5, ±15
5, ±12
5, ±15
5, ±12
5, ±15
2500, ±500
2500, ±400
3000, ±625
3000, ±500
3000, ±625
3000, ±500
25-30 Watt Triple Series Block Diagram
SHIELDED
ISOLATION TRANSFORMERS
SINGLE SECTION
6
+ 5
THERMAL SHUTDOWN
A
48T MODELS
ONLY
7
9
+ 5 CMN
+ 5 TRIM
1
2
+ INPUT
- INPUT
ANTI-PHASE
DUAL PWM
CONTROLLER
DIFFERENTIAL
MODE
INPUT
FILTER
ISOLATION BARRIER
3
4
+ 12/15
± CMN
12T AND 24T
MODELS
ON/OFF
8
5
- 12/15
SHIELDED, LOW THERMAL GRADIENT COPPER CASE
DUAL SECTION
2401 Stanwell Drive
•
Concord, California 94520
•
Ph: 925/687-4411 or 800/542-3355
•
Fax: 925/687-3333
•
www.calex.com
•
Email: sales@calex.com
3/2001
1
25 to 30 Watt XC Triple Series DC/DC Converters
Input Parameters*
Model
12T5.12XC 12T5.15XC 24T5.12XC 24T5.15XC 48T5.12XC 48T5.15XC
Units
MIN
MAX
10.0
20.0
18.0
36.0
36.0
72.0
Voltage Range
VDC
TYP
MAX
TYP
TYP
350
500
2550
30
150
300
1465
20
150
350
735
15
Reflected Ripple (2), 0-20MHz bw
mA P-P
mA
Input Current Full Load
No Load
Efficiency
TYP
TYP
80
85
85
%
Switching Frequency
120
kHz
Maximum Input Overvoltage,
100ms No Damage
MAX
TYP
25
45
85
VDC
Turn-on Time, 1% Output Error
Recommended Fuse
35
(3)
ms
Amps
Output Parameters*
24T5.12XC
12T5.12XC 24T5.15XC
12T5.15XC 48T5.12XC
48T5.15XC
24T5.12XC
48T5.12XC
24T5.15XC
48T5.15XC
Model
12T5.12XC
12T5.15XC
Units
Output Voltage
+5
0
2500
+5
0
3000
±12
160
500
±12
160
625
±15
125
400
±15
125
500
VDC
mA
MIN
MAX
Rated Current (4)
MIN
TYP
MAX
TYP
MAX
4.950
5.000
5.050
N/A
N/A
11.925
12.000
12.075
0.5
0.7
14.925
15.000
15.075
0.5
0.7
Voltage Range
100% Load
VDC
%
Output Balance
(Plus to Minus Output, Full Load)
Load Regulation 25-100% Load
(5)
TYP
MAX
TYP
MAX
0.4
0.7
0.5
0.05
0.1
0.1
0.2
0.05
0.1
0.1
0.2
%
0-100%
0.75
TYP
MAX
TYP
MAX
N/A
N/A
0.6
0.8
0.0
0.1
0.5
0.75
Cross regulation (6)
%
%
Line Regulation
Vin = Min-Max VDC
Short Term Stability (7)
Long Term Stability
TYP
TYP
TYP
TYP
TYP
0.02
0.1
%
%/kHrs
µs
Transient Response (8)
Dynamic Response (9)
Input Ripple Rejection (10)
100
270
200
250
>70
200
200
mV peak
dB
TYP
MAX
TYP
MAX
30
65
50
200
15
Noise, 0-20MHz bw (2)
mV P-P
50
100
6.8
50
200
18
A
Temperature Coefficient
Overvoltage Clamp (11)
ppm/°C
TYP
VDC
Short Circuit Protection to
Common for all Outputs
Provides minimum of 8 hours continuous protection with current limiting and
thermal overload techniques
NOTES
(5) The dual section load regulation is defined as the voltage
changeineitheroutputastheloadsonbothoutputsarechanged
from minimum load to maximum load at the same time.
AllparametersmeasuredatTc=25°C,nominalinputvoltage
and full rated load unless otherwise noted. Refer to the
CALEX Application Notes for the definition of terms,
measurement circuits and other information.
*
(6) Cross regulation is defined as the change in one output when the
other output is changed from minimum to maximum load.
(2) Noise is measured per CALEX Application Notes found in the
CALEX Power Conversion Design Guide and Catalog.
Measurement bandwidth is 0 - 20 MHz. See the applications
section of this note for more information.
(7) Short term stability is specified after a 30 minute warmup at full
load, constant line, load and ambient conditions.
(8) Transient response is defined as the time for the output to settle
from a 25 to 75 % step load change to a 1% error band (rise time
of step = 2µ Sec).
(3) Determine the correct fuse size by calculating the maximum DC
current drain at low line input, maximum load and then adding 20
to 25% to get the desired fuse size. A slow blow type fuse is
recommended.
(9) Dynamic response is defined as the peak overshoot during a
transient as defined in note 8 above.
(4) Minimum load is required for proper regulation only. No module
damage is sustained if run less than minimum load. Regulation
of the dual output degrades with substantial load unbalance.
(10) The input ripple rejection is specified for DC to 120 Hz ripple with
a modulation amplitude of 1% of Vin.
2401 Stanwell Drive
•
Concord, California 94520
•
Ph: 925/687-4411 or 800/542-3355
•
Fax: 925/687-3333
•
www.calex.com
•
Email: sales@calex.com
3/2001
2
25 to 30 Watt XC Triple Series DC/DC Converters
General Specifications*
All Models
Units
ON/OFF Function (12)
ON Logic Level
or Leave Pin Open
MIN
2.4
VDC
OFF Logic Level
Input Resistance
MAX
TYP
1.5
2
VDC
kohms
Converter Idle Current,
Shut Down Pin Low
TYP
12
mA
VDC
pF
Isolation
Isolation Voltage
Input to Either Output
Single to Dual Output
10µA Leakage
Input to Output
Capacitance
Input to Single Output
Input to Dual Output
Single to Dual Output
MIN
MIN
1544
500
BOTTOM VIEW
SIDE VIEW
TYP
TYP
TYP
95
90
45
Mechanical tolerances unless otherwise noted:
X.XX dimensions: ±0.020 inches
Environmental
Case Operating Range
No Derating
MIN
MAX
MIN
MAX
MIN
-40
85
-40
90
-55
105
°C
°C
X.XXX dimensions: ±0.005 inches
Case Funtional Range (13)
Storage Range
Seal around terminals is not hermetic. Do not immerse units in any
liquid.
°C
MAX
Thermal Impedance
Pin Mount Version
Thermal Shutdown
Case Temperature
TYP
TYP
4.4
°C/Watt
°C
100
Pin
1
Function
+INPUT
-INPUT
+12/15V
CMN
Pin
6
Function
+5V
General
7
CMN
2
Unit Weight
Mounting Kit
Agency Aprovals
6.2
oz.
8
3
ON/OFF
+5V TRIM
MS12
UL 1459
9
4
5
-12/15V
(11) For module protection only, see also note 3.
(12) The ON/OFF pin is Open Collector TTL, CMOS, and relay
compatible. The input to this pin is referenced to the -input.
(13) Thefunctionaltemperaturerangeisintendedtogiveanadditional
data point for use in evaluating this power supply. At the low
functional temperature the power supply will function with no
side effects, however, sustained operation at the high functional
temperature will reduce expected operational life. The data
sheet specifications are not guaranteed over the functional
temperature range.
A
Chassis Mounting Kit - MS12
(14) Specifications subject to change without notice.
Heat Sink Option
TheMS12chassismountingkitallowsfordirectwireconnection
to the 25-30 Watt Triple Series. The mounting kit includes two
barrier strips for wire attachment, an input fuse and an output
trim pot for trimming the +5 volt output. Provisions are also
made for additional output bypassing and grounding.
The 25-30 Watt Triple can be ordered with a “-I” configuration
which provides a case with 3 by M3 inserts located on the top
surface of the case for attaching a heat sink. When an “-HS”
is ordered CALEX will ship the converter with a heat sink
attached. The CALEX HS heat sink was specially developed
for this model and can reduce the case temperature rise to
below 3.3°C per watt with natural convection and less with
moving air. One heat sink is needed for each 25-30 Watt
Triple ordered.
If the MS12 is ordered at the same time as a 25-30 Watt
Triple the mounting kit will be shipped with the correct fuse
size.
The MS12 may be conveniently attached to a chassis by
using the 4 - 0.156 inch diameter mounting holes provided at
each corner.
Customer installed heat sinks may also be used. It is
recommendedthatonlyliquidheatsinkcompoundbeusedon
the heat sink interface. Avoid the so called “Dry” pad heat sink
materials. In our experience these materials are actually
worse than using no compound at all.
Although the MS12 comes with solderless sockets for the
25-30 Watt Triple, it is recommended that the converter be
soldered to the mounting kit for improved reliability under
severe environmental or vibration conditions.
2401 Stanwell Drive
•
Concord, California 94520
•
Ph: 925/687-4411 or 800/542-3355
•
Fax: 925/687-3333
•
www.calex.com
•
Email: sales@calex.com
3/2001
3
25 to 30 Watt XC Triple Series DC/DC Converters
ApplicationInformation
+ 5
+ 5 CMN
+ 5 TRIM
6
7
9
The dual control loops are locked together in time by a
proprietary “Anti-Phase Dual PWM Controller” subassembly.
The synchronization reduces beat frequency problems that
occur when two switching supplies run at slightly different
frequencies. The “Anti-Phase” operation also evens out the
current pulses on the input bulk capacitor allowing for
conservative derating and hence longer life.
+ 5 LOAD
FUSE
1
+ INPUT
+ INPUT
+ 5 TRIM
- INPUT
ON/OFF
- INPUT
2
8
+ 12/15
± CMN
- 12/15
3
4
5
+ LOAD
- LOAD
The dual loop design allows both the single and dual
outputs to be fully isolated from each other. This helps the
system design by allowing the common analog and digital
ground point to be elsewhere in the system. The dual outputs
can also be used as single ended 24 or 30 volt outputs.
ON/OFF
Figure 1.
The 25-30 Watt Triple Series is also mindful of battery
operation for industrial/medical control and remote data
collection.TheremoteON/OFFcontrolpinplacestheconverter
in a very low power mode that draws only 0.5 mA maximum
from the input source. This is at least a 10:1 improvement over
industry standard specifications of 5 to 30 mA standby current
drain.
Standard connections for the 25-30 Watt Triple. The ON/OFF and
Trim pins can be left floating if they are not used. The input fuse
should not be omitted.
The ON/OFF and +5 trim pins may be left floating if they are
not used. No external capacitance on either the input or
outputs is required for normal use which can, in fact, degrade
the converter’s operation. See our application note
“UnderstandingPowerSupplyOutputImpedanceforOptimum
Decoupling” for more information. The usual 0.1 to 0.01µF
bypasses may be used around your PCB as required for local
bypassing without harm. Extremely low ESR capacitors ( <0.2
ohms) should not be used at the input. This will cause peaking
of the input filters’ transfer function and actually degrade the
filters’ performance.
These converters achieve an output noise of 30 mV peak
topeaktypicalandarefullyspecifiedandtestedtoamaximum
specification of 65 mV peak to peak over a wide bandwidth of
0-20 MHz. Input filtering reduces reflected ripple noise and is
similarly low and also fully specified for typical and maximum
values (exact value depends on input voltage range).
All inputs and outputs are protected from transient
overvoltage conditions by 500 watt transient overvoltage
suppressors. Full overload protection is provided by
independent pulse-by-pulse current limiting and
overtemperatureshutdown. Theseprotectionfeaturesassure
you that our 25-30 Watt Triple will provide zero failure rate
operation.
Single Output
The single output is independently regulated and isolated
from the dual outputs and can be operated independently or
with a common ground with the dual output.
Six-sided shielding is standard along with specified
operation over the full industrial temperature range of -40° to
+85°C.
The +5 TRIM pin may be used to adjust the +5 volt output
by up to ±5 % from the nominal factory setting of +5.000 volts.
Thetrimmaybeusedtoadjustforsystemwiringvoltagedrops
or to adjust the +5 output up to 5.2 volts for ECL applications.
Since the 5 volt output is completely isolated from the dual
section the output can be grounded to generate -5.2 volts or
+5.2 volts. Figure 2 shows theAproper connections for the trim
pin.
The 25-30 Watt Triple Series, like all CALEX converters,
carriesthefull5yearCALEXnohasslewarranty. Wecanoffer
a five year warranty where others can’t because with CALEX
it’s rarely needed.
General Operation
Figure 1 shows the recommended connections for the 25-30
Watt Triple DC/DC converter. A fuse is recommended to
protect the input circuit and should not be omitted. The fuse
serves two purposes:
TRIM DOWN
+ 5
+ 5 TRIM
+ 5 CMN
6
9
7
1) It prevents unlimited current from flowing in the case of
a catastrophic system failure.
+ 5 LOAD
2) UL regulations for telecom equipment require the use of
a fuse.
10K TRIMPOT
TRIM UP
Figure 2.
The 5 volt output can be trimmed by using either a trimpot or fixed
resistors. If fixed resistors are used their values may range from
zero to infinite ohms the trimpot should be 10K ohms nominal.
2401 Stanwell Drive
•
Concord, California 94520
•
Ph: 925/687-4411 or 800/542-3355
•
Fax: 925/687-3333
•
www.calex.com
•
Email: sales@calex.com
3/2001
4
25 to 30 Watt XC Triple Series DC/DC Converters
Do not use the lowest ESR, biggest value capacitor that
youcanfind!Thiscanonlyleadtoreducedsystemperformance
or oscillation.
6
9
7
+ 5
+ 5 TRIM
+ 5 CMN
R1
R3
C1
R4
See our application note “Understanding Power Supply
Output Impedance for Optimum Decoupling” in the CALEX
Power Conversion Design Guide and Catalog for more
information.
REMOTE
+ 5 VOLT
LOAD
Q1
IC1
R5
R2
+ INPUT
1
100K
15V
Parts List
100 W
R4
R5
Q1
IC1
4.99K, 1%
C1
R1
R2
R3
0.1µF, 50V, Ceramic
470 ohm, 5%
1.0K, 5%
ON/OFF
- INPUT
8
2
4.99K, 1%
2N3906
TL431
2.4K, 5%
Figure 3.
This simple circuit allows for remote sensing with the 5 volt output.
The circuit can correct for up to 0.25 volts of total drop in the power
leads. At 3 amps of output this is approximately 0.08 ohms of line
resistance. A trimpot may be added to R5 to allow for exact
adjustment of the 5 volt output.
Figure 5.
The simplified schematic of the ON/OFF pin shows a 100K resistor
connected between the +Input and the ON/OFF pin. The maximum
open circuit voltage is clamped by the 15 volt zener diode. The 100
ohm resistor prevents large ground currents from flowing out the
ON/OFF pin instead of the -Input pin during power up transients.
Figure 3 shows how to implement remote sense with the
trim pin and a TL431 adjustable voltage reference. This circuit
allows automatic correction of the output voltage up to 0.25
volts total.
Case Grounding
The case serves not only as a heat sink but also as an EMI
shield. The case/header shield is tied to the +Input pin for the
48T models. The 12T and 24T models have the case tied to
the -Input pin. These connections are shown on the 25-30
Watt Triple block diagram.
Dual Output
The dual output is independently regulated and isolated from
the single output and can be operated separately or with a
common ground with the single output. The dual outputs can
also be connected for single-ended load applications of either
24 or 30 volts as shown in Figure 4. This configuration allows
for full output current operation up to the full 25 or 30 watt
rating.
For all models the case is floating from the output sections.
Remote ON/OFF Pin Operation
The remote ON/OFF pin may be left floating if this function is
not used. The equivalent input circuit for the ON/OFF pin is
shown in Figure 5. The best way to drive this pin is with an
open collector/drain or relay contact. See our application note
titled“UnderstandingtheRemoteON/OFFFunction”formore
information about using the remote ON/OFF pin.
+ 12/15
± CMN
- 12/15
3
4
5
+ LOAD
- LOAD
24 or 30V
LOAD
When the ON/OFF pin is pulled low with respect to the -
A
Input, the converter is placed in a low power drain state. This
low power state typically draws less than 200 mA from the
input source. When the ON/OFF pin is released the converter
powers up in typically 35 mSec. The ON/OFF pin turns the
converter off while keeping the input bulk capacitor fully
charged. This prevents the large inrush current spike that
occurs when the +Input pin is opened and closed.
Figure 4.
The dual output may be used either as a dual polarity or single-
ended source. If the output is used as a single-ended source, pin 4
should be left unconnected.
Grounding
Temperature Derating / Mounting Options
The +5 and ± dual sections are floating independently from
each other. They may be operated this way or with a common
ground.
TheXCTripleSeriescanoperateupto85°Ccasetemperature
withoutderating.Casetemperaturemayberoughlycalculated
fromambientbyknowingthattheXCTriples’casetemperature
rise is 4.4°C per package watt dissipated. For example, if the
converter was functioning at an output of 30 Watts, at what
ambient could it expect to run with no moving air and no
additional heatsinks?
If the single and dual sections are connected either directly
at the converter or at some remote location it is suggested that
1 µF, 35 volt Tantalum capacitor bypasses be used directly at
the converter output pins. These capacitors prevent any
common mode switching currents from showing up on the
converter’s outputs as normal mode output noise.
2401 Stanwell Drive
•
Concord, California 94520
•
Ph: 925/687-4411 or 800/542-3355
•
Fax: 925/687-3333
•
www.calex.com
•
Email: sales@calex.com
3/2001
5
25 to 30 Watt XC Triple Series DC/DC Converters
Efficiency is approximately 85%, this leads to an input
temperature. Because of the difficulty of defining ambient
temperature and the possibility that the loads’ dissipation may
actually increase the local ambient temperature significantly,
these calculations should be verified by actual measurement
before committing to a production design.
powerof35watts. Thecasetemperaturerisewouldbe5watts
x 4.4 = 22°C. This number is subtracted from the maximum
case temperature of 85°C to get 63°C.
This is a rough approximation of the maximum ambient
Typical Performance (Tc=25°C, Vin=Nom VDC, Rated Load).
12 VOLT EFFICIENCY Vs. LOAD
12 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE
12 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
85
80
75
70
65
60
85
80
75
70
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
LINE = 10VDC
50% FULL LOAD
100% FULL LOAD
100% LOAD
50% LOAD
LINE = 12VDC
LINE = 20VDC
0
10
20
30
40
50
60
70
80
90
100
10
12
14
16
18
20
0
2
4
6
8
10
12
14
16
18
20
LOAD (%)
LINE INPUT(VOLTS)
LINE INPUT (VOLTS)
24 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
24 VOLT EFFICIENCY Vs. LOAD
24 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE
2.5
2.0
1.5
1.0
0.5
0.0
90
85
80
75
70
65
90
85
80
75
70
50% FULL LOAD
100% FULL LOAD
LINE = 18VDC
100% LOAD
50% LOAD
LINE = 24VDC
LINE = 36VDC
0
4
8
12
16
20
24
28
32
36
0
10
20
30
40
50
60
70
80
90
100
18
20
22
24
26
28
30
32
34
36
LINE INPUT (VOLTS)
LOAD (%)
LINE INPUT(VOLTS)
48 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
48 VOLT EFFICIENCY Vs. LOAD
48 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE
1.25
1.00
0.75
0.50
0.25
0.00
90
85
80
75
70
65
60
55
90
85
80
75
70
100% FULL LOAD
50% FULL LOAD
LINE = 36VDC
100% LOAD
50% LOAD
LINE = 48VDC
A
LINE = 72VDC
0
10
20
30
40
50
60
70
80
0
10
20
30
40
50
60
70
80
90
100
35
40
45
50
55
60
65
70
75
LINE INPUT (VOLTS)
LOAD (%)
LINE INPUT(VOLTS)
OUTPUT VOLTAGE Vs. OUTPUT LOAD
OUTPUT IMPEDANCE Vs. FREQUENCY
DERATING
110
100
90
80
70
60
50
40
30
20
10
0
10
110
100
90
80
70
60
50
40
30
20
10
0
INFINITE HEAT SINK
DUAL OUTPUT
5V OUTPUT
5V OUTPUT
+/- DUAL OUTPUT
NO HEAT SINK
1
SAFE OPERATING AREA
.1
.01
0
50
100
150
200
250
300
350
400
450
500
10
100
1000
10000
100000
1000000
-40
-25
-10
5
20
35
50
65
80
95
110
OUTPUT LOAD (%)
FREQUENCY (Hz)
AMBIENT TEMPERATURE (Deg C)
2401 Stanwell Drive
•
Concord, California 94520
•
Ph: 925/687-4411 or 800/542-3355
•
Fax: 925/687-3333
•
www.calex.com
•
Email: sales@calex.com
3/2001
6
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