SP48S33-66 [WALL]
66W DC-DC Converter;
| 型号： | SP48S33-66 |
| 厂家： | 
WALL INDUSTRIES,INC. |
| 描述： | 66W DC-DC Converter |
| 文件： | 总7页 (文件大小：227K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
APPLICATION NOTES
Rev C
ꢀSP48S3.3-66
66W DC-DC Converter
36-75 Vdc Input
3.3 Vdc Output at 20A
Half-Brick Package
Features:
xꢀ Low Output Ripple
xꢀ 80% Efficient at Full Load
xꢀ Fast Transient Response
xꢀ Operation to No Load
xꢀ Fixed Switching Frequency
xꢀ Output Over Current Protection
xꢀ Output Short Circuit Protection
xꢀ Over Temperature Protection
xꢀ 1500 Vdc Isolation
xꢀ 100% Burn In
xꢀ Remote ON/OFF (Active High/Low)
xꢀ Remote Sense Compensation
xꢀ UL 1950 Listed - CE Mark
xꢀ Test Board Available
Description:
The SP & SPW series is a high-density half brick converter that incorporates the desired features required in
today’s demanding applications. When performance, reliability, and low cost are needed, the SP & SPW
series delivers.
(888) 597-WALL
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Rev C
APPLICATION NOTES
SP & SPW SERIES
WALL INDUSTRIES, INC.
Technical Specifications
Model No. SP48S3.3-66
All specifications are based on 25C, Nominal Line and Full Load unless otherwise noted.
We reserve the right to change specifications based on technological advances.
SPECIFICATION
Related condition
MIN
NOM
MAX
Unit Measured
INPUT
Turn on at
Turn off at
34
32
Volt DC
Volt DC
Input Over voltage Shutdown
Turn off at
78
77
48
2.283
25
2
Volt DC
Volt DC
Volt DC
A
Turn on at
Operating Voltage Range
Maximum Input Current
No Load Input Current
Input Current under “LOGIC OFF”
Inrush Current Transient Rating
Reflected Ripple Current
OUTPUT
Rated Input Voltage
Low Line 100% load
36
75
mA
mA
A2 Sec
mA
20
Output Voltage Set point
Output Voltage Regulation
Over Load
3.267
3.300
3.333
Volt DC
0.1
0.1
0.02
%
%
Over Line
Over Temperature
Output Voltage Ripple and Noise
Basic Ripple
% / oC
mV
mV
A
A
A/sec
Spikes P-P
50
20
32
Output Current Ranges
Output Current Limit
Short Term Output Current Surge
DYNAMIC CHARACTERISTICS
Input Voltage Ripple Rejection
Output Transient and Load Changes
Load step / delta V
Load step / delta V
Recovery Time
Rated Output Current
120 Hz
0
24
28
dB
X
X
50 to 75%
75 to 50%
50 to 100%
100 to 50 %
250
250
100
250
0
mV
mV
µsec
M sec
%
To within 1% Rated Vo
From Vin(nom) to 90% Vout (nom)
Full Load Resistive
Turn on Delay
Overshoot of Output Voltage
EFFICIENCY
@ 100% load
@ 75% load
@ 50% load
@ 25% load
80
81
82
80
%
%
%
%
TEMPERATURE CONSIDERATIONS
Thermal Resistance
Normal Convection
100 lfm
Rtheta c-a
7.5
6.2
5.1
4.3
3.5
oC/Watt
oC/Watt
oC/Watt
oC/Watt
oC/Watt
200 lfm
300 lfm
400 lfm
Heatsink Considerations
General Technical Data
Switching Frequency
Remote ON OFF Control (See Note Below)
Trimmablility
Contact Factory
FIXED
Positive or Negative
400
105
KHz
Over Temperature Shutdown
Case Temperature
oC
MTBF
Bellcore TR-332 nom is 2.50m
Hours
Note: Positive Remote ON/OFF control is standard. To order negative logic Remote ON/OFF control add the suffix "R" to the part number.
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(888) 597-WALL
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APPLICATION NOTES
WALL INDUSTRIES, INC.
SP & SPW SERIES
Figure 1: Mechanical Dimensions
Unit: inches
Tolerance: X.XX ±0.020
X.XXX±0.010
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APPLICATION NOTES
WALL INDUSTRIES, INC.
SP & SPW SERIES
Output Voltage Trim
The following information is provided to allow quick calculation of the trim resistor value for a desired output voltage. The general
procedure for calculating a trim resistor is as follows:
1. Determine the desired output voltage (Vo)
2. Select Equation. (Trim Low/Trim High)
3. Use the data in Table 1 to complete the equation.
4. Evaluate.
In order to trim low use Equation 1 and Table 1 to calculate resistor RTL for the desired output voltage.
Equation 1: Trim Low
ª
«
¬
º
»
¼
Vo ꢀVREF
RT
ꢀ R
L
LIM
VREF
(
) ꢀ ( 1 (Vo ꢀVREF ))
RL
RH
Vo - Desired output voltage.
All resistor values in K ohms.
Schematic 1: Trim Low
In order to trim high use Equation 2 and Table 1 to calculate resistor RTH for the desired output voltage.
Equation 2: Trim High
ª
«
º
»
VREF
RTH
ꢀ RLIM
Vo ꢀVREF
VREF
RL
«
»
ꢀ
ꢂ ꢁ
ꢁ
ꢂ
RH
¬
¼
Vo - Desired output voltage.
All resistor values in K ohms.
Schematic 2: Trim High
MODEL
RH
RLIM
RL
VREF
(Output Voltage)
3.3V
(K OHMS)
(K OHMS)
(K OHMS)
(VOLTS)
0.750
0.499
2.32
2.495
5.0V
8.0V
9.0V
12.0V
15.0V
24.0V
26.0V
32.0V
2.49
5.49
6.49
9.53
12.4
21.5
17.6
23.7
10.0
10.0
10.0
13.7
13.7
15.4
15.4
12.7
2.49
2.49
2.49
2.49
2.49
2.49
1.87
2.00
2.495
2.495
2.495
2.495
2.495
2.495
2.495
2.495
Table 1 : Trim Low/High Data Table.
Note: Output trim +/- 10% max.
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APPLICATION NOTES
SP & SPW SERIES
WALL INDUSTRIES, INC.
DERATING CURVE
100
90
80
70
60
50
40
30
20
10
0
0 LFM
100 LFM
200 LFM
300 LFM
400 LFM
5
15
25
35
45
55
65
75
85
95
105
A MBIENT TEMPERA TURE 0C
SP 48S3.3-66
POWER DISSIPATION VS OUTPUT POWER
20
18
16
14
12
10
8
36 VIN
48 VIN
75VIN
6
4
2
0
0
10
20
30
40
50
60
70
80
90
100
% OUTPUT POWER
SP48S3.3-66
EFFICIENCY VS RATED OUTPUT POWER
90
80
70
60
50
40
30
36V
48V
75V
10
20
30
40
50
60
70
80
90
100
RATED OUTPUT POWER (%)
SP48S3.3-66
(888) 597-WALL
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APPLICATION NOTES
SP & SPW SERIES
WALL INDUSTRIES, INC.
TYPICAL OUTPUT RIPPLE VOLTAGE
20mV/div, 2 us/div, full load 48 vin 10 uF
decoupling cap. Room temperature.
TYPICAL INPUT REFLECTED RIPPLE CURRENT
20mA/div, full load 48 vin.(using 12uH, 33uF (low ESR)
source impedance). Room temperature.
TYPICAL RISE TIME AND TURN ON DELAY
USING LOGIC ENABLE
TYPICAL RISE TIME AND TURN ON DELAY
WITH VIN 0-48V
1 V/div, 10 mS/div, (vout) 2 V/div, 10 mS/div
(logic enable) 48 vin, full load. Room temperature.
1V/div, 10 mS/div, (vout) 20 V/div 10 mS/div (vin)
48 vin full load. Room temperature.
SP48S3.3-66
(888) 597-WALL
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Rev C
APPLICATION NOTES
WALL INDUSTRIES, INC.
SP48S3.3-66
Ordering Information:
Part Number Example:
SP 48 S 3.3- 66 R
Series
Designation
Nominal
Input
Voltage
Single
Output
Nominal
Output
Voltage
Maximum
Output
Power
Options
Blank
Leave Blank for
Active High Enable
R
Active Low Enable
Company Information:
Wall Industries, Inc. has created custom and modified units for over 40 years. Our in-house research and development engineers will
provide a solution that exceeds your performance requirements on time and on budget. Our ISO9001-2000 certification is just one
example of our commitment to producing a high quality, well documented product for our customers.
Our past projects demonstrate our commitment to you, our customer. Wall Industries, Inc. has a reputation for working closely with its
customers to ensure each solution meets or exceeds form, fit and function requirements. We will continue to provide ongoing support for
your project above and beyond the design and production phases. Give us a call today to discuss your future projects.
Contact Wall Industries for further information:
Phone:
Toll Free:
Fax:
ꢀ(603)778-2300
ꢀ (888)587-9255
ꢀ (603)778-9797
E-mail:
Web:
sales@wallindustries.com
www.wallindustries.com
5 Watson Brook Rd.
Exeter, NH 03833
Address:
(888) 597-WALL
www.wallindustries.com
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