12S3.2000NT [ETC]
Analog IC ; 模拟IC\n
| 型号： | 12S3.2000NT |
| 厂家： | 
ETC |
| 描述： | Analog IC
|
| 文件： | 总6页 (文件大小：144K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
10 Watt NT Single Series DC/DC Converters
Features
!
Fully Self Contained, No External Parts Required
for Operation
!
Low and Specified Input/Output Capacitance
!
Efficiencies to 85%
!
Overcurrent Protected for Long, Reliable Operation
!
Five-sided, Shielded, Low Thermal Gradient
Copper Case
!
Water Washable Case Design
!
Five Year Warranty
Description
Selection Chart
Input Range
VDC
These 10 Watt DC/DC converters were designed for fast
integration with your system’s power needs. With no external
components or filtering necessary for all but the most critical
applications, these converters can provide power instantly.
This saves you costly engineering time required to design
your system around the power converter.
Output
VDC
Output
mA
Model
Min
9
Max
12S3.2000NT
12S5.2000NT
12S12.900NT
12S15.700NT
24S3.2000NT
24S5.2000NT
24S12.900NT
24S15.700NT
48S3.2000NT
48S5.2000NT
48S12.900NT
48S15.700NT
48S5.1500NT
18
18
18
18
36
36
36
36
72
72
72
72
60
3.33
5
2000
2000
900
9
9
12
15
3.33
5
9
700
18
18
18
18
36
36
36
36
20
2000
2000
900
12
15
3.33
5
700
2000
2000
900
12
15
5
700
1500
10 Watt NT Single Series Block Diagram
A
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
10 Watt NT Single Series DC/DC Converters
Input Parameters*
Model
12S3.2000NT 12S5.2000NT 12S12.900NT 12S15.700NT 24S3.2000NT 24S5.2000NT
Units
MIN
MAX
9
18
18
36
Voltage Range
VDC
TYP
TYP
280
90
440
145
140
45
210
70
mA P-P
Reflected Ripple (2)
mA RMS
Input Current Full Load
No Load
TYP
TYP
710
7
1070
7
1100
12
1060
15
340
7
500
7
mA
Efficiency
TYP
TYP
78
78
82
83
82
83
%
Switching Frequency
220
kHz
Maximum Input Overvoltage,
100ms Maximum
Turn-on Time,
MAX
TYP
24
45
VDC
ms
6
1% Output Error
Recommended Fuse
(3)
AMPS
Model
24S12.900NT 24S15.700NT 48S3.2000NT 48S5.2000NT 48S12.900NT 48S15.700NT
Units
MIN
MAX
18
36
36
72
Voltage Range
VDC
TYP
TYP
210
70
100
35
150
50
mA P-P
Reflected Ripple (2)
mA RMS
Input Current Full Load
No Load
TYP
TYP
530
10
510
10
170
6
260
6
270
6
260
6
mA
Efficiency
TYP
TYP
85
86
80
81
83
84
%
Switching Frequency
220
kHz
Maximum Input Overvoltage,
100ms Maximum
MAX
TYP
45
85
VDC
ms
Turn-on Time,
1% Output Error
6
Recommended Fuse
(3)
AMPS
Model
48S5.1500NT
Units
MIN
MAX
20
60
Voltage Range
VDC
TYP
TYP
130
40
mA P-P
Reflected Ripple (2)
mA RMS
Input Current Full Load
No Load
TYP
TYP
200
6
mA
Efficiency
TYP
TYP
78
%
Switching Frequency
220
kHz
Maximum Input Overvoltage,
100ms Maximum
Turn-on Time,
MAX
TYP
72
VDC
6
ms
1% Output Error
A
Recommended Fuse
(3)
AMPS
NOTES
(6) The transient response is specified as the time required to settle
from a 50 to 75 % step load change (rise time of step = 2 µSec)
to a 1% error band.
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.
*
(7) Dynamic response is the peak overshoot during a transient
as defined in note 6 above.
(8) The input ripple rejection is specified for DC to 120 Hz ripple with
a modulation amplitude of 1% of Vin.
(2) Noise is measured per CALEX Application Notes. Measurement
bandwidth is 0-20 MHz for peak-peak measurements, 10 kHz to
1 MHz for RMS measurements. Output noise is measured with
a 0.01µF / 100V ceramic capacitor in parallel with a 1µf / 35V
Tantalum capacitor, 1 inch from the output pins to simulate
standard PCB decoupling capacitance.
(9) 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.
(3) To determine the correct fuse size, see CALEX Application
Notes.
(4) The Case is tied to the -input pin.
(10) Thecasethermalimpedanceisspecifiedasthecasetemperature
rise over ambient per package watt dissipated.
(5) Short term stability is specified after a 30 minute warmup at full
load, constant line and recording the drift over a 24 hour period.
(11) Specifications subject to change without notice.
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
10 Watt NT Single Series DC/DC Converters
Output Parameters*
12S3.2000NT 12S5.2000NT 12S12.900NT 12S15.700NT
Model
24S3.2000NT 24S5.2000NT 24S12.900NT 24S15.700NT 48S5.1500NT
48S3.2000NT 48S5.2000NT 48S12.900NT 48S15.700NT
Units
VDC
VDC
Output Voltage
Output Voltage Accuracy
3.33
5
12
15
5
MIN
TYP
MAX
3.30
3.33
3.36
4.95
5.00
5.05
11.90
12.00
12.10
14.90
15.00
15.10
4.95
5.00
5.05
MIN
MAX
0.2
2.0
0.0
2.0
0.0
0.9
0.0
0.7
0.0
1.5
Rated Load Range
A
Load Regulation
25% Max Load - Max Load
TYP
MAX
0.1
0.4
0.1
0.4
0.2
0.4
0.2
0.4
0.1
0.3
%
Line Regulation
Vin = Min-Max VDC
TYP
MAX
0.5
1.0
0.01
0.2
0.2
0.8
0.2
0.8
0.01
0.2
%
Short Term Stability (5)
TYP
< 0.05
%/24Hrs
Long Term Stability
TYP
TYP
TYP
TYP
< 0.1
250
%/kHrs
µs
Transient Response (6)
Dynamic Response (7)
Input Ripple Rejection (8)
100
130
250
90
400
350
500
125
250
mV peak
dB
> 40
Noise, Peak - Peak (2)
RMS Noise
TYP
TYP
60
6
75
5
mV P-P
mV RMS
TYP
MAX
50
150
Temperature Coefficient
ppm/°C
Short Circuit Protection to
Common for all Outputs
Continuous, Current Limit Protection
±0.002
General Specifications*
All Models
Units
Isolation (4)
Isolation Voltage
Input to Output 12S, 24S MIN
700
1544
VDC
pF
Input to Output 48S
10µA Leakage
MIN
Input to Output
Capacitance
TYP
400
Environmental
BOTTOM VIEW
SIDEVIEW
Case Operating Range
No Derating
MIN
MAX
MIN
MAX
MIN
-40
90
-50
100
-55
105
°C
°C
A
Case Functional Range (9)
Storage Range
Mechanical tolerances unless otherwise noted:
°C
MAX
X.XX dimensions: ±0.020 inches
Thermal Impedance (10)
General
TYP
15
°C/Watt
X.XXX dimensions: ±0.005 inches
Unit Weight
TYP
1.0
oz
Chassis Mounting Kit
MS6, MS8, MS15
Pin
1
Function
+INPUT
-INPUT
2
3
+OUTPUT
CMN
4
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
10 Watt NT Single Series DC/DC Converters
No external capacitance on the output is required for
normal operation. In fact, it can degrade the converter’s
performance. See our application note “Understanding DC/
DC Converters Output Impedance” and the low noise circuits
for more information. The usual 1 to 10 µF aluminum or
tantalum and 0.1 to 0.001 µF bypasses may be used around
your PCB as required without harm.
Applications Information
General Information
Adequate heat sinking and full filtering on both the input and
outputareincludedinthe10WattNTSingleSeries,preventing
the need for additional components and heat sinking in most
applications.
Full overload protection is provided by independent pulse-
by-pulse current limiting. These protection features assure
you that our 10 Watt Single will provide zero failure rate
operation.
Extratransientovervoltageprotectionmaybeaddeddirectly
at the converter’s output pins as shown in Figure 1.
A fully five-sided shielded, sealed, water washable case is
standard along with specified operation over the full industrial
temperature range of -40 to +90°C.
1
2
3
4
Applying the Input
Figure1showstherecommendedconnectionsforthe10Watt
NT Single DC/DC converter. A fuse is recommended to
protect the input circuit and should not be omitted. The fuse
serves an important purpose in preventing unlimited current
from flowing in the case of a catastrophic system failure. See
ourapplicationnoteoninputfuseselectionformoreinformation.
Figure 2.
For very low noise applications the circuits shown above can be
used. The input current ripple will be reduced approximately 30 dB
of the original value while the output noise will be reduced to below
10 mV P-P. Do not use the biggest lowest ESR capacitors that you
can find in these circuits. Large capacitors can cause severe
peaking in the filter’s transfer function and may actually make the
conducted noise worse.
No external capacitance on the input is required for normal
operation. In fact, it can degrade the converter’s performance.
If extra filtering is desired on the input, see the low noise input
circuit in Figure 2.
Extremely low ESR capacitors (< 0.25 ohms) should not be
used at the input. This will cause peaking of the input filter’s
transferfunctionandactuallydegradethefilter’sperformance.
Isolation - Case Grounding
If desired, extra transient overvoltage protection may be
added directly at the converter’s input pins as shown in
Figure 1.
The input and output sections are fully floating from each
other. They may be operated fully floating or with a common
ground. If the input and output sections are connected either
directly at the converter or at some remote location from the
converter it is suggested that a 1 to 10 µF, 0.5 to 5 ohm ESR
capacitor bypass be used directly at the converter output pins.
Thiscapacitorpreventsanycommonmodeswitchingcurrents
from showing up at the converter’s output as normal mode
output noise. Do not use the lowest ESR, biggest value
capacitor that you can find! This can only lead to reduced
system performance or oscillation.
A
The case serves not only as a heat sink but also as an EMI
shield. The 0.016 inch thick copper provides >25 dB of
absorption loss to both electromagnetic and electric fields at
220 kHz, while at the same time providing about 30% more
effective heat sinking than competitive 0.01 inch thick steel
cases.
Figure 1.
The case shield is tied to the -input pin. This connection is
shown on the block diagram. The case is floating from the
output, coupled only by the 400 pF of isolation capacitance.
This low capacitance insures that any AC common mode
noise on the inputs is not transferred to your output circuits.
Standard connections for the 10 Watt NT Single. The input fuse
should not be omitted. The overvoltage diodes D1 and D2 may be
added to the circuit directly at the converter to provide transient
protection to your circuit.
Compare this isolation capacitance value to the 600 to
2000 pF found on competitive designs and you’ll see that with
CALEXyouaregettingthebestDCandACisolationavailable.
After all, you are buying an isolated DC/DC converter to cut
ground loops. Don’t let the isolation capacitance add them
back in.
Applying the Output
The output is simply connected to your application circuit and
away you go! If extra low output noise is required for your
application the circuit shown in Figure 2 may be used to
reduce the output noise to below 10 mV P-P.
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
10 Watt NT Single Series DC/DC Converters
Temperature Derating
TheNTSingleseriescanoperateupto90°Ccasetemperature
withoutderating.Casetemperaturemayberoughlycalculated
from ambient by knowing that the 10 Watt NT Singles case
temperature rise is approximately 15°C per package watt
dissipated.
For example: If a 24 Volt input converter was delivering
7Wattsat24Voltsinput, atwhatambientcoulditexpecttorun
with no moving air and no extra heat sinking?
Efficiency for the NT Single is approximately 84%. Check the
product curves for exact information. This leads to an input
power of about 8.3 Watts. Therefore, the case dissipation is
8.3 Watts (input power) minus 7 Watts (output power) or 1.3
Watts. The case temperature rise would be 1.3 Watts x 15 =
20°C. This number is subtracted from the maximum case
temperature of 90°C to get 70°C.
This is a rough approximation of the maximum ambient
temperature. Because of the difficulty of defining ambient
temperature and the possibility that the load’s dissipation may
actually increase the local ambient temperature significantly
orthatconvectioncoolingissuppressedbyphysicalplacement
of the module, these calculations should be verified by actual
measurement of operating temperature and your circuit’s
exact efficiency (efficiency depends on both line input and
load value) before committing to a production design.
Typical Performance (Tc=25°C, Vin=Nom VDC, Rated Load).
Data For 12 Volt Input Models
12 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
12 VOLT EFFICIENCY Vs. LOAD
12 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE
1.5
1.0
0.5
0.0
85
80
75
70
65
85
84
83
82
81
80
50% FULL LOAD
LINE =
9VDC
100% LOAD
50% LOAD
100% FULL LOAD
LINE =
12VDC
A
LINE =
18VDC
4
6
8
10
12
14
16
18
0
10
20
30
40
50
60
70
80
90
100
9
10
11
12
13
14
15
16
17
18
LINE INPUT (VOLTS)
LOAD (%)
LINE INPUT(VOLTS)
Data For 24 Volt Input Models
24 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
24 VOLT EFFICIENCY Vs. LOAD
24 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE
0.8
90
85
80
75
70
65
60
88
86
84
82
80
100% FULL LOAD
0.6
LINE =
18VDC
100% LOAD
0.4
50% LOAD
50% FULL LOAD
LINE =
24VDC
0.2
LINE =
36VDC
0.0
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)
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
10 Watt NT Single Series DC/DC Converters
Typical Performance (Tc=25°C, Vin=Nom VDC, Rated Load).
Data For 48 Volt Input Models
48 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
48 VOLT EFFICIENCY Vs. LOAD
48 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE
0.4
85
80
75
70
65
60
55
50
45
40
85
80
75
70
0.3
LINE =
36VDC
100% FULL LOAD
50% FULL LOAD
100% LOAD
0.2
50% LOAD
LINE =
48VDC
0.1
LINE =
72VDC
0.0
5
15
25
35
45
55
65
75
0
10
20
30
40
50
60
70
80
90
100
35
20
10
40
45
50
55
60
65
70
75
LINE INPUT (VOLTS)
LOAD (%)
LINE INPUT(VOLTS)
Data For 48S5.1500NT Only
INPUT CURRENT Vs. LINE INPUT VOLTAGE
EFFICIENCY Vs. LOAD
48 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE
0.6
85
80
75
70
65
60
55
50
45
85
80
75
70
65
60
55
50
100% FULL LOAD
LINE = 20VDC
0.5
0.4
LINE = 48VDC
50% FULL LOAD
0.3
100% LOAD
0.2
50% LOAD
0.1
LINE = 60VDC
0.0
0
10
20
30
40
50
60
0
10
20
30
40
50
60
70
80
90
100
25
30
35
40
45
50
55
60
LINE INPUT (VOLTS)
LOAD (%)
LINE INPUT(VOLTS)
Data For All Models
OUTPUT VOLTAGE Vs. CASE TEMPERATURE
OUTPUT VOLTAGE Vs. OUTPUT LOAD
OUTPUT IMPEDANCE Vs. FREQUENCY
0.2
0.1
120
100
80
60
40
20
0
10
1
12 AND 15 VOLT
0.0
CURRENT LIMIT MODE ->
-0.1
-0.2
-0.3
-0.4
.1
3.3 AND 5 VOLT
.01
.001
"HICKUP" MODE ->
-40
-20
0
20
40
60
80
100
0
20
40
60
80
100
120
140
160
180
200
100
1000
10000
100000
1000000
CASE TEMPERATURE (Deg C)
OUTPUT LOAD (%)
FREQUENCY (Hz)
A
DERATING
120
100
80
60
40
20
0
INFINITE HEAT SINK
NO HEAT SINK →
↑
← SAFE OPERATING AREA →
↓
-40
-20
0
20
40
60
80
100
120
AMBIENT TEMPERATURE (Deg C)
NOTES ON USING THE CURVES
(2) The efficiency curves were generated for 12 Volt output models.
To use for other outputs adjust as follows:
These notes apply to all curves except the 48S5.1500NT curves.
3.33 Volt output.......Subtract approximately 3%
5.0 Volt output........Subtract approximately 2%
15.0 Volt output.......Add approximately 1%
(1) The input current curves are for 10.8 Watts of output power. For
3.3 Volt output models the input current is approximately 35%
less.
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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