Data Sheet
April 2008
LAW005-Series Power Modules; dc-dc Converters:
36 Vdc to 75 Vdc Input; 5 W
Features
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Small footprint: 32 mm x 20 mm (1.25 in. x 0.8 in.)
Low profile: 10.7 mm (0.42 in.)
Wide input voltage range: 36 Vdc to 75 Vdc
Input-to-output isolation: 1500 Vdc
Operating ambient temperature range:
–25 °C to +71 °C with no derating
12.5 W per cubic inch
Metal case
Burn in 4 hours @ 50 °C, full load
Output overcurrent protection, unlimited duration
Output overvoltage protection
UL*
60950 Recognized,
CSA
†
C22.2 No. 60950-00
Certified,
VDE
‡
0805 (IEC60950) Licensed
CE mark meets 73/23/EEC and 93/68/EEC
directives
§
Within FCC Class A radiated limits
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The LAW005-Series Power Modules use advanced, surface-
mount technology and deliver high-quality, compact, dc-dc
conversion at an economical price.
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Applications
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Communication equipment
Computer equipment
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Options
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Short pins: 2.8 mm ± 0.25 mm
(0.110 in. ± 0.010 in.)
Description
The LAW005-Series Power Modules are low-profile dc-dc converters that operate over an input voltage range
of 36 Vdc to 75 Vdc and provide precisely regulated single or dual outputs. The –25 °C to +71 °C operating
temperature range makes it ideal for electronic data processing applications. The outputs are isolated from the
inputs, allowing versatile polarity configurations and grounding connections. The modules have a maximum
power rating of 5 W and a typical full-load efficiency of 80%. Built-in filtering for both input and output minimizes
the need for external filtering.
*
†
‡
§
UL
is a registered trademark of Underwriters Laboratories, Inc.
CSA
is a registered trademark of Canadian Standards Association.
VDE
is a trademark of Verband Deutscher Elektrotechniker e.V.
This product is intended for integration into end-use equipment. All the required procedures for CE marking of end-use equipment should
be followed. (The CE mark is placed on selected products.)
LAW005-Series Power Modules; dc-dc Converters:
36 Vdc to 75 Vdc Input; 5 W
Data Sheet
April 2008
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-
lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess
of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect device reliability.
Parameter
Input Voltage:
Continuous
Transient (100 ms)
Operating Ambient Temperature*
(natural convection)
Storage Temperature
I/O Isolation Voltage
Symbol
V
I
V
I, trans
T
A
T
stg
—
Min
0
0
–25
–55
—
Max
80
100
71
105
1500
Unit
Vdc
V
°C
°C
Vdc
* At I
O
= I
O, max
, derate linearly to 0 W at 100 °C. Unit guaranteed to start at –40 °C. All parameters will be within specification at T
A
= –25 °C.
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage and resistive load from –25 °C to
+71 °C.
Table 1. Input Specifications
Parameter
Operating Input Voltage
Input Current
(V
I
= 0 V to V
I, max
; I
O
= I
O, max
)
Inrush Transient
Input Reflected-ripple Current
(See Figure 1.)
Fusing Considerations
CAUTION: This power module is not internally fused. An input line fuse must always be used.
This encapsulated power module can be used in a wide variety of applications, ranging from simple stand-alone
operation to an integrated part of a sophisticated power architecture. To preserve maximum flexibility, internal fus-
ing is not included; however, to achieve maximum safety and system protection, always use an input line fuse. The
safety agencies require a normal-blow fuse with a maximum rating of 5 A (see Safety 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.
Symbol
V
I
I
I, max
i
2
t
I
I
Min
36
—
—
—
Typ
48
250
0.008
5
Max
75
—
—
—
Unit
Vdc
mA
A
2
s
mAp-p
2
Lineage Power
Data Sheet
April 2008
LAW005-Series Power Modules; dc-dc Converters:
36 Vdc to 75 Vdc Input; 5 W
Electrical Specifications
(continued)
Table 2. Output Specifications
Parameter
Output Voltage Set Point
(V
I
= 48 V; I
O
= I
O, max
; T
A
= 25 °C)
Device
LAW005F
LAW005A
LAW005B
LAW005C
LAW005BK
LAW005CL
Output Voltage
(Over all line, load, and temperature
conditions until end of life; see Figure 3.)
LAW005F
LAW005A
LAW005B
LAW005C
LAW005BK
LAW005CL
Output Regulation:
Line (V
I
= 36 V to 75 V)
Load (I
O
= 25% I
O, max)
Symbol
V
O, set
V
O, set
V
O, set
V
O, set
V
O1, set
V
O2, set
V
O1, set
V
O2, set
V
O
V
O
V
O
V
O
V
O1
V
O2
V
O1
V
O2
—
—
—
—
—
—
—
—
Min
3.26
4.95
11.88
14.85
11.88
11.88
14.85
14.85
3.17
4.80
11.52
14.40
11.52
–11.52
14.40
–14.40
—
—
—
—
—
—
—
—
Typ
3.3
5.00
12.00
15.00
12.00
12.00
15.00
15.00
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Max
3.33
5.05
12.12
15.15
12.12
12.12
15.15
15.15
3.43
5.20
12.48
15.60
12.48
–12.48
15.60
–15.60
0.2
0.5
0.5
0.5
0.5
1.0
1.0
0.2
Unit
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
%V
O
%V
O
%V
O
%V
O
%V
O
%V
O
%V
O
%V
O
Load (I
O
= 50% I
O, max
to I
O, max
)
Temperature (T
A
= –25 °C to +71 °C)
Output Ripple and Noise Voltage
(see Figure 2.):
RMS
Peak-to-peak (5 Hz to 20 MHz)
External Load Capacitance
All
LAW005F
LAW005A
LAW005B
LAW005C
LAW005BK
LAW005CL
All
All
All
LAW005F
LAW005A
LAW005B
LAW005C
LAW005BK
LAW005CL
LAW005F
LAW005A
LAW005B
LAW005C
LAW005BK
LAW005CL
—
—
—
—
—
—
—
—
I
O
I
O
I
O
I
O
I
O1
I
O2
I
O1
I
O2
I
O
I
O
—
—
—
—
—
—
—
—
0.050
0.050
0.024
0.020
0.012
0.012
0.010
0.010
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
165
300
10
75
1000
1000
220
150
47
47
1.0
1.0
0.47
0.40
0.23
0.23
0.19
0.19
—
—
mVrms
mVp-p
μF
μF
μF
μF
μF
μF
A
A
A
A
A
A
A
A
%I
O, max
%I
O, max
Output Current
(At I
O
< I
O, min
, the modules may exceed
output ripple specifications.)
Output Current-limit Inception
(V
O
= 90% x V
O, set
)
Output Short-circuit Current
(duration typ. 8 ms before shutdown;
V
O
≤
60% V
O, nom
)
Lineage Power
All
All
3
LAW005-Series Power Modules; dc-dc Converters:
36 Vdc to 75 Vdc Input; 5 W
Data Sheet
April 2008
Electrical Specifications
(continued)
Table 2. Output Specifications
(continued)
Parameter
Efficiency
(V
I, nom
; I
O
= I
O, max
; T
A
= 25 °C; see Figure 3.)
Device
LAW005F
LAW005A
LAW005B
LAW005C
LAW005BK
LAW005CL
Symbol
η
η
η
η
η
η
Min
71
74
77
78
77
78
Typ
73
78
80
82
80
80
Max
—
—
—
—
—
—
Unit
%
%
%
%
%
%
Dynamic Response
(½I
O
/½t = 1 A/10 µs, V
I
= V
I, nom
, T
A
= 25 °C):
Load Change from I
O
= 50% to 75% of I
O, max
:
Peak Deviation
Settling Time (V
O
< 10% peak deviation)
Load Change from I
O
= 50% to 25% of I
O, max
:
Peak Deviation
Settling Time (V
O
< 10% peak deviation)
Table 3. Isolation Specifications
Parameter
Isolation Capacitance
Isolation Resistance
All
All
All
All
—
—
—
—
—
—
—
—
1
0.15
1
0.15
—
—
—
—
%V
O, set
ms
%V
O, set
ms
Min
—
100
Typ
1000
—
Max
—
—
Unit
pF
M¾
Table 4. General Specifications
Parameter
Weight
Table 5. Feature Specifications
Parameter
Output Overvoltage Protection (clamp)
Output Overvoltage Protection (clamp)
Output Overvoltage Protection (clamp)
Output Overvoltage Protection (clamp)
Output Overvoltage Protection (clamp)
Output Overvoltage Protection (clamp)
Device
LAW005F
LAW005A
LAW005B
LAW005C
LAW005BK
LAW005CL
Symbol
V
O,CLAMP
V
O,CLAMP
V
O,CLAMP
V
O,CLAMP
V
O,CLAMP
V
O,CLAMP
Min
4.0
6.4
13.8
16.8
—
—
Typ
4.3
6.8
15
18
—
—
Max
4.6
7.2
15.6
19.1
—
—
Unit
V
V
V
V
V
V
Min
—
Typ
18 (0.64)
Max
20 (0.71)
Unit
g (oz.)
4
Lineage Power
Data Sheet
April 2008
LAW005-Series Power Modules; dc-dc Converters:
36 Vdc to 75 Vdc Input; 5 W
Test Configurations
TO OSCILLOSCOPE
L
TEST
12 µH
C
S
220 µF
IMPEDANCE < 0.1
Ω
@ 20 ˚C, 100 kHz
V
I
(+)
Safety Considerations
For safety-agency approval of the system in which the
power module is used, the power module must be
installed in compliance with the spacing and separation
requirements of the end-use safety agency standard,
i.e.,
UL
60950,
CSA
C22.2 No. 60950-00, and
VDE
0805 (IEC60950).
If the input source is non-SELV (ELV or a hazardous
voltage greater than 60 Vdc and less than or equal to
75 Vdc), for the module's output to be considered
meeting the requirements of safety extra-low voltage
(SELV), all of the following must be true:
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BATTERY
V
I
(-)
1-0304
Note: Input reflected-ripple current is measured with a simulated
source impedance of 12 µH. Capacitor Cs offsets possible
battery impedance. Current is measured at the input of the
module.
The input source is to be provided with reinforced
insulation from any other hazardous voltages, includ-
ing the ac mains.
One V
I
pin and one V
O
pin are to be grounded, or
both the input and output pins are to be kept floating.
The input pins of the module are not operator acces-
sible.
Another SELV reliability test is conducted on the
whole system, as required by the safety agencies, on
the combination of supply source and the subject
module to verify that under a single fault, hazardous
voltages do not appear at the module's output.
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Figure 1. Input Reflected-Ripple Test Setup
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COPPER STRIP
V
O
(+)
0.1 µF
V
O
(–)
SCOPE
RESISTIVE
LOAD
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1-0305
Note: Use a 0.1 µF ceramic capacitor. Scope measurement should
be made using a BNC socket. Position the load between
50.8 mm and 76.2 mm (2 in. and 3 in.) from the module.
Note:
Do not ground either of the input pins of the
module without grounding one of the output
pins. This may allow a non-SELV voltage to
appear between the output pins and ground.
The power module has extra-low voltage (ELV) outputs
when all inputs are ELV.
The input to these units is to be provided with a maxi-
mum 5 A normal-blow fuse in the ungrounded lead.
Figure 2. Peak-to-Peak Output Noise
Measurement Test Setup
CONTACT AND
DISTRIBUTION LOSSES
V
I
(+)
I
I
SUPPLY
V
I
(-)
CONTACT RESISTANCE
1-0306
Feature Description
Output Overvoltage Protection (single output mod-
ules only)
Output overvoltage protection is not a feature on dual
output modules. For single output modules, the output
overvoltage protection consists of a Transient Voltage
Suppressor (TVS) diode across the output terminals.
During an ouput overvoltage fault condition, this diode
protection clamps the output within the voltages shown
in Table 5
V
O
(+)
I
O
LOAD
V
O
(-)
Note: All measurements are taken at the module terminals. When
socketing, place Kelvin connections at module terminals to
avoid measurement errors due to socket contact resistance.
[
V
O
(
+
)
– V
O
(–)
]I
O
-
η
=
⎛
------------------------------------------------
⎞
x 100
⎝ [
V
I
(
+
)
– V
I
(–)
]I
I
⎠
%
Figure 3. Output Voltage and Efficiency
Measurement Test Setup
Lineage Power
5
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