Lambda’s new X Series Power Modules are
ideally suited for Telecommunications and
Network applications.
X Series
Application Manual
IM-XAM Rev B.
E90482 05/02
X Series Application Manual
Page 2
Table of Contents
1.
2.
Product Description
Electrical Specifications
3
3
3
3
4
4
5
9
10
12
13
13
14
14
16
16
16
16
17
19
20
20
22
24
Table 1. Absolute Maximum Ratings
Fusing Considerations
Table 2. Input Specifications
Table 3. Isolation Specifications
Table 4. Output Specifications
Table 5. General Specifications
Table 6. Feature Specifications
3.
4.
Outline Diagram/Recommended Hole Pattern
Part Number Description
Table 7. Option Codes
5.
6.
7.
Design Considerations
Safety Considerations
Feature Descriptions
Output Overvoltage Clamp
Current Limit
Remote On/Off (Optional)
Output Voltage Adjustments (optional on Single-Output Units)
8.
9.
10.
11.
12.
Thermal Considerations
Layout Considerations
Test Configurations
Recommended EMI Filter
Characteristic Charts
IM-XAM Rev B.
E90482 05/02
Page 3
X Series Application Manual
1. Product Description
X10/15/20 DC-DC CONVERTERS: The X series DC-DC converters provide regulated output at power levels up to
20 watts. It accepts a wide range DC input and provides a fully isolated, regulated output. In forced air applications,
full output power can be maintained as long as the case temperature, as measured per figure 4, is maintained at less
than or equal to 100°C.
2.
Electrical Specifications
Table 1. Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device.
These are absolute stress ratings only. Functional operation of the device is not implied at these or
any other conditions in excess of those given in the Table 1. Exposure to absolute maximum ratings
for extended periods can adversely affect device reliability.
Parameter
Input Voltage:
Continuous
X10/15/20-24
X10/15/20-48
Transient (100 ms)
Operating Case Temperature
Storage Temperature
I/O Isolation
X10/15/20-48
All
All
All
Vi
Vi
Vi, trans
Tc
Tstg
−
0
0
0
-40
-55
−
−
−
−
−
−
−
50
80
100
105*
125
1500
Vdc
Vdc
V
°C
°C
Vdc
Module
Symbol
Min
Typ
Max
Unit
*Maximum case temperature varies based on power dissipation. Refer to the Section 12 for all characteristic charts.
Fusing Considerations
CAUTION: This power module is not internally fused. An input line fuse must always be used.
The safety agencies require a normal-blow, dc fuse with a maximum rating of 5 A (see Safely
Considerations section). Based on the information provided in this data sheet on inrush energy and
maximum dc input current, the same type of fuse with a lower rating can be used. Refer to the fuse
manufacturer’s data for further information.
IMPORTANT LIMITATIONS OF USE
Lambda products are not authorized for use as critical components in nuclear control systems, life
support systems or equipment for use in hazardous environments without the express written
approval of the Managing Director/President of the Lambda Group manufacturer of the product
concerned.
IM-XAM Rev B.
E90482 05/02
X Series Application Manual
Page 4
Table 2. Input Specifications
Parameter
Operating Input Voltage
Module
X10/15/20-24
X10/15/20-48
Maximum Input Current
(Vi=0 to Vi, max; Io=Io, max;
X10/15/20-24
X10/15/20-48
Symbol
Vi
Vi
Ii, max
Ii, max
Min
18
36
−
−
Typ
24
48
−
−
Max
36
75
1.6
800
Unit
Vdc
Vdc
A
mA
Inrush Transient
Undervoltage Lockout
All
X10/15/20-24
X10/15/20-48
I
2
t
V
uvlo
V
uvlo
Ii
−
11
20
−
−
14
27
7
0.2
−
−
A
2
s
V
V
mAp-p
Input reflected -ripple Current
(5 Hz to 20 MHz; 12
µH
source impedance;
Input Ripple Rejection (100 Hz-120 Hz)
* Refer to Section 12 all characteristic charts.
All
−
All
−
−
45
−
dB
Table 3. Isolation Specifications
Parameter
Isolation Capacitance
Isolation Resistance
Min
−
10
Typ
600
−
Max
−
−
Unit
pF
MΩ
IM-XAM Rev B.
E90482 05/02
Page 5
X Series Application m Manual
Table 4. Output Specifications
Parameter
Output Voltage Set Point
(Vi=Vi, nom; Io=Io, max;
T
A
= 25
°C)
Module Suffix
S1.8
S02
S2.5
S03
S05
S12
D12
Symbol
Vo,
set
Vo,
set
Vo,
set
Vo,
set
Vo,
set
Vo,
set
Vo1, set
Vo2, set
Min
1.73
1.92
2.4
3.17
4.8
11.52
11.4
-11.4
1.71
1.9
2.37
3.13
4.75
11.40
10.8
-10.8
Typ
1.8
2.0
2.5
3.3
5.0
12.0
12.0
-12.0
−
2.0
2.5
−
−
−
−
−
Max
1.87
2.08
2.6
3.43
5.20
12.48
12.6
-12.6
1.89
2.1
2.63
3.47
5.25
12.60
13.2
-13.2
Unit
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Output Voltage
(Over all line, load, and tempera-
ture conditions until end of life; see
figures 7 and 9)
S1.8
S02
S2.5
S03
S05
S12
D12
Vo,
set
Vo,
set
Vo,
set
Vo,
set
Vo,
set
Vo,
set
Vo,set
Output Regulation
Line (Vi=Vi
, min
to Vi
,
max)
S1.8,S02,S2.5,S03,S05
S12
Load (Io=Io, min to Io, max)
Output Ripple and Noise
(Across 2x 0.47
µF
ceramic capaci-
tors; see figures 6 and 8)
RMS
S1.8,S02,S2.5,S03,S05,
S12
D12
External Load Capacitance
IM-XAM Rev B.
−
−
−
−
−
−
−
0.01
−
5
0.1
15
mV
%VO
mV
S1.8,S02,S2.5,S03,S05
−
−
−
−
−
−
−
−
−
−
−
−
30
35
50
10000
mVrms
mVrms
mVrms
µF
E90482 05/02
All
