Data Sheet
April 2008
LC020 Single-Output Series Power Module:
18 Vdc to 36 Vdc Inputs; 20 W
The LC020 Single-Output Series Power Modules use
advanced, surface-mount technology and deliver high-qual-
ity, compact, dc-dc conversion at an economical price.
Applications
nDistributed Power Architectures
nTelecommunications
nData Networking
nWireless
Features
nLow profile: 9.9 mm (0.390 in.) with standoffs,
9.53 mm (0.375 in.) with standoffs recessed
nWide input voltage range: 18 Vdc to 36 Vdc
nInput-to-output isolation: 850 V
nOperating ambient temperature range: –40 °C to
+100 °C
nOutput overcurrent protection, unlimited duration
nRemote on/off logic
nOutput voltage adjust: 90% to 110% of VO, nom
nUL* 60950 Recognized, CSA† C22.2 No. 60950-00
Certified, VDE‡ 0805 (IEC60950) Licensed
nWithin FCC Class A radiated limits
Options
nChoice of remote on/off logic configuration
nCase ground pin
nSynchronization
nShort pin: 2.79 mm ± 0.25 mm
(0.110 in. ± 0.010 in.)
Description
The LC020 Single-Output Series Power Modules are low-profile, dc-dc converters that operate over an input
voltage range of 18 Vdc to 36 Vdc and provide a precisely regulated 3.3 V, 5 V, 12 V, or 15 V output. The output
is isolated from the input, allowing versatile polarity configurations and grounding connections. The modules
have a maximum power rating of 20 W at a typical full-load efficiency of up to 82%.
The power module features remote on/off and output voltage adjustment of 90% to 110% of the nominal output
voltage. 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.
2Lineage Power
Data Sheet
April 2008
18 Vdc to 36 Vdc Inputs; 20 W
LC020 Single-Output Series Power Module:
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 operations sections of the data sheet. Exposure to absolute maximum ratings for
extended periods can adversely affect device reliability.
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions.
Table 1. Input Specifications
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, dc 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.
Parameter Symbol Min Max Unit
Input Voltage
Continuous
100 ms Transient
VI
VI, trans
0
0
40
50
Vdc
V
Operating Case Temperature
(See Thermal considerations section.)
TC–40 100 °C
Storage Temperature Tstg –40 120 °C
I/O Isolation Voltage — — 850 Vdc
Parameter Symbol Min Typ Max Unit
Operating Input Voltage VI18 28 36 Vdc
Maximum Input Current
(VI = 0 V to VI, max; IO = IO, max; see Figures 1—4.)
II, max ——2.2A
Inrush Transient i2t——0.1A
2s
Input Reflected-ripple Current (50 Hz to 20 MHz;
12 µH source impedance, TC = 25 °C; see Figure16
and Design Considerations section.)
II—3—mAp-p
Input Ripple Rejection (100 Hz—120 Hz) — — 60 — dB
Lineage Power 3
Data Sheet
April 2008 18 Vdc to 36 Vdc Inputs; 20 W
LC020 Single-Output Series Power Module:
Electrical Specifications (continued)
Table 2. Output Specifications
Parameter Device Symbol Min Typ Max Unit
Output Voltage Set Point
(VI = 28 V; IO = IO, max; TC = 25 °C)
LC020F
LC020A
LC020B
LC020C
VO, set
VO, set
VO, set
VO, set
3.25
4.92
11.81
14.76
—
—
—
—
3.35
5.08
12.19
15.24
Vdc
Vdc
Vdc
Vdc
Output Voltage
(Over all line, load, and temperature
conditions until end of life; see Figure 18.)
LC020F
LC020A
LC020B
LC020C
VO
VO
VO
VO
3.17
4.80
11.52
14.40
—
—
—
—
3.43
5.20
12.48
15.60
Vdc
Vdc
Vdc
Vdc
Output Regulation:
Line (VI = 18 V to 36 V)
Load (IO = IO, min to IO, max)
Temperature (TC = –40 °C to +100 °C)
All
All
All
—
—
—
—
—
—
0.01
0.05
0.5
0.1
0.2
1.0
%VO
%VO
%VO
Output Ripple and Noise Voltage
(See Figure 17.)
RMS
Peak-to-peak (5 Hz to 20 MHz)
LC020A, F
LC020B, C
LC020A, F
LC020B, C
—
—
—
—
—
—
—
—
—
—
20
50
30
50
100
150
mVrms
mVrms
mVp-p
mVp-p
Output Current
(At IO < IO, min, the modules may exceed
output ripple specifications.)
LC020A, F
LC020B
LC020C
IO
IO
IO
0.4
0.17
0.13
—
—
—
4.0
1.67
1.33
A
A
A
Output Current-limit Inception
(VO = 90% x VO, set) (See Figures 5 — 8.)
All IO103 — 150 %IO, max
Output Short-circuit Current
(VO = 250 mV)
All IO—135200%IO, max
Efficiency (VI, nom; IO = IO, max; TC = 25 °C;
see Figures 9 — 12, 18.)
LC020F
LC020A
LC020B
LC020C
η
η
η
η
73
76
79
79
76
79
82
82
—
—
—
—
%
%
%
%
Switching Frequency All — — 256 — kHz
Dynamic Response
(ΔIO/Δt = 1 A/10 µs, VI = VI, nom, TA = 25 °C;
see Figures 13,14.):
Load Change from IO = 50% to 75% of
IO, max:
Peak Deviation All — — 1 — %VO, set
Settling Time (VO < 10% peak deviation) All — — 0.5 — ms
Load Change from IO = 50% to 25% of
IO, max:
Peak Deviation All — — 1 — %VO, set
Settling Time (VO < 10% peak deviation) All — — 0.5 — ms
4Lineage Power
Data Sheet
April 2008
18 Vdc to 36 Vdc Inputs; 20 W
LC020 Single-Output Series Power Module:
Electrical Specifications (continued)
Table 3. Isolation Specifications
General Specifications
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions. .
Parameter Min Typ Max Unit
Isolation Capacitance — 0.002 — µF
Isolation Resistance 10 — — MΩ
Parameter Min Typ Max Unit
Calculated MTBF (IO = 80% of IO, max; TC = 40 °C) 5,800,000 hours
Weight — — 54 (1.9) g (oz.)
Parameter Device Symbol Min Typ Max Unit
Remote On/Off
(VI = 0 V to 36 V; open collector or equivalent
compatible; signal referenced to VI(–) terminal.
See Figure 19 and Feature Descriptions.):
LC020xx Positive Logic
Logic Low—Module Off
Logic High—Module On
LC020xx1 Negative Logic
Logic Low—Module On
Logic High—Module Off
Module Specifications:
On/Off Current—Logic Low
On/Off Voltage:
Logic Low
Logic High (Ion/off = 0)
Open Collector Switch Specifications:
All
All
All
Ion/off
Von/off
Von/off
—
–0.7
—
—
—
—
1.0
1.2
6
mA
V
V
Leakage Current During Logic High
(Von/off = 6 V)
All Ion/off ——50 µA
Output Low Voltage During Logic Low
(Ion/off = 1 mA)
All Von/off ——1.2 V
Turn-on Time (IO = 80% of IO, max;
TC = 40 °C VO within ±1% of steady state)
All — — — 2 ms
Output Voltage Overshoot (See Figure15) All — — 0 5.0 %
Output Voltage Set-Point Adjustment Range All — 90 — 110 %VO, nom
Output Overvoltage Protection (clamp) LC020F
LC020A
LC020B
LC020C
VO, clamp
VO, clamp
VO, clamp
VO, clamp
3.9
5.6
13.2
16.5
—
—
—
—
5.0
7.0
16.5
19.0
V
V
V
V
Lineage Power 5
Data Sheet
April 2008 18 Vdc to 36 Vdc Inputs; 20 W
LC020 Single-Output Series Power Module:
Characteristics Curves
1-0333
Figure 1. LC020F Typical Input Characteristics,
TA = 25 °C
8-1374a
Figure 2. LC020A Typical Input Characteristics,
TA = 25 °C
1-0335
Figure 3. LC020B Typical Input Characteristics,
TA = 25 °C
1-0334
Figure 4. LC020C Typical Input Characteristics,
TA = 25 °C
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
INPUT CURRENT, II (A)
INPUT VOLTAGE, VI (V)
20 25 30 35 400 5 10 15
IO = 2 A
IO = 0.4 A
IO = 4 A
0 5 10 20 35
0.0
0.4
0.6
0.8
1.8
2.0
INPUT VOLTAGE (V)
0.2
4015 25 30
1.0
1.6
1.4
1.2
I
O
= 4 A
I
O
= 2 A
I
O
= 0.4 A
INPUT CURRENT (A)
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
INPUT CURRENT, II (A)
INPUT VOLTAGE, VI (V)
20 25 30 35 400 5 10 15
IO = 0.83 A
IO = 1.66 A
IO = 0.16 A
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
INPUT CURRENT, I
I
(A)
INPUT VOLTAGE, V
I
(V)
20 25 30 35 400 5 10 15
I
O
= 0.65
A
I
O
= 1.33
A
I
O
= 0.13
A
66 Lineage Power
Data Sheet
April 2008
18 Vdc to 36 Vdc Inputs; 20 W
LC020 Single-Output Series Power Module:
Characteristics Curves (continued)
1-0342
Figure 5. LC020F Typical Output Characteristics,
TA = 25 °C
8-1373
Figure 6. LC020A Typical Output Characteristics,
TA = 25 °C
1-0344
Figure 7. LC020B Typical Output Characteristics,
TA = 25 °C
1-0343
Figure 8. LC020C Typical Output Characteristics,
TA = 25 °C
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
OUTPUT CURRENT, I
O
(A)
0 2345671
V
I
= 36 V
V
I
= 27 V
V
I
= 18 V
OUTPUT VOLTAGE, V
O
(V)
012 45
0
2
3
4
5
6
OUTPUT CURRENT, IO (A)
1
63
VI = 36 V
VI = 28 V
VI = 18 V
OUTPUT VOLTAGE (V)
14
12
10
8
6
4
2
0
OUTPUT CURRENT, IO (A)
0 1.0 1.5 2.0 2.5 3 3.
5
0.5
VI = 36 V
VI = 27 V
VI = 18 V
OUTPUT VOLTAGE, VO (V)
16
14
12
10
8
6
4
2
0
OUTPUT CURRENT, IO (A)
0 1.0 1.5 2.0 2.5 30.5
VI = 36 V
VI = 27 V
VI = 18 V
OUTPUT VOLTAGE, VO (V)
Lineage Power 7
Data Sheet
April 2008 18 Vdc to 36 Vdc Inputs; 20 W
LC020 Single-Output Series Power Module:
Characteristics Curves (continued)
1-0340
Figure 9. LC020F Typical Converter Efficiency vs.
Output Current, TA = 25 °C
8-1372
Figure 10.LC020A Typical Converter Efficiency vs.
Output Current, TA = 25 °C
1-0339
Figure 11.LC020B Typical Converter Efficiency vs.
Output Current, TA = 25 °C
1-0341
Figure 12.LC020C Typical Converter Efficiency vs.
Output Current, TA = 25 °C
78
76
74
72
70
68
66
64
62
60
OUTPUT CURRENT, IO (A)
0.4 0.9 1.4 1.9 2.4 2.9 3.4 3.
9
VI = 18 V
VI = 27 V
VI = 36 V
EFFICIENCY, η (%)
00.5 1.0 2.0 2.5 3.0 3.5
70
74
75
76
79
80
OUTPUT CURRENT (A)
73
4.01.5
72
71
V
IN
= 36 V
V
IN
= 28 V
V
IN
= 18 V
EFFICIENCY, η (%)
78
77
85
80
75
70
65
60
OUTPUT CURRENT, IO (A)
0.16 0.36 0.56 0.76 0.96 1.16 1.36 1.56
VI = 18 V
VI = 27 V
VI = 36 V
EFFICIENCY, η (%)
85
80
75
70
65
60
OUTPUT CURRENT, IO (A)
1.3
3
1.130.930.730.530.330.13
VI = 18 V
VI = 27 V
VI = 36 V
EFFICIENCY, η (%)
88 Lineage Power
Data Sheet
April 2008
18 Vdc to 36 Vdc Inputs; 20 W
LC020 Single-Output Series Power Module:
Characteristics Curves (continued)
8-1261
Figure 13.LC020A,B,C,F Typical Output Voltage for
a Step Load Change from 50% to 25%
8-1262
Figure 14.LC020A,B,,C,F Typical Output Voltage for
a Step Load Change from 50% to 75%
8-1263
Figure 15.LC020A,B,C,F Typical Output Voltage
Start-up When Signal Applied to Remote
On/Off
TIME, t (100 µs/div)
OUTPUT CURRENT, I
O
(A) OUTPUT VOLTAGE, V
O
(V)
100%
101%
25%
50%
OUTPUT CURRENT, I O (A)
TIME, t (100 µs/div)
OUTPUT VOLTAGE, V O (V)
100%
99%
75%
50%
TIME, t (1 ms/div)
REMOTE ON/OFF
V
on/off
(V)
OUTPUT VOLTAGE, V
O
(V)
2 V/div
0V
0V
100%
Lineage Power 9
Data Sheet
April 2008 18 Vdc to 36 Vdc Inputs; 20 W
LC020 Single-Output Series Power Module:
Test Configurations
8-203
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.
Figure 16.Input Reflected-Ripple Test Setup
8-513
Note: Use a 0.1 µF ceramic capacitor. Scope measurement should
be made using a BNC socket. Position the load between
50 mm (2 in.) and 75 mm (3 in.) from the module.
Figure 17.Peak-to-Peak Output Noise
Measurement Test Setup
8-204
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.
Figure 18.Output Voltage and Efficiency
Measurement Test Setup
Design Considerations
Grounding Considerations
For standard units, the case is connected internally to
VI(–). For units with the case ground pin option, the
case is not connected internally allowing the user flexi-
bility in grounding.
Input Source Impedance
The power module should be connected to a low ac-
impedance input source. Highly inductive source
impedances can affect the stability of the power mod-
ule. For the test configuration in Figure 16, a 33 µF
electrolytic capacitor (ESR < 0.7 ¾ at 100 kHz)
mounted close to the power module helps ensure sta-
bility of the unit. For other highly inductive source
impedances, consult the factory for further application
guidelines.
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 22.2-950 No. 60950-00, and VDE
0805 (IEC60950).
For the converter output to be considered meeting the
requirements of safety extra low voltage (SELV), the
input must meet SELV requirements.
If the input meets extra low voltage (ELV) require-
ments, then the converter’s output is considered ELV.
The input to these units are to be provided with a maxi-
mum 5 A normal-blow fuse in the ungrounded lead.
Feature Descriptions
Overcurrent Protection
To provide protection in a fault (output overload) condi-
tion, the unit is equipped with internal current-limiting
circuitry and can endure current limiting for an unlim-
ited duration. At the point of current-limit inception, the
unit shifts from voltage control to current control. If the
output voltage is pulled very low during a severe fault,
the current-limit circuit can exhibit either foldback or tai-
lout characteristics (output-current decrease or
increase). The unit operates normally once the output
current is brought back into its specified range.
TO OSCILLOSCOPE
12 µH
C
S
220 µF
IMPEDANCE < 0.1 Ω
@ 20 ˚C, 100 kHz
V
I
(+)
V
I
(-)
BATTERY 33 µF
L
TEST
VO(+)
VO(-)
0.1 µF RESISTIVE
LOAD
SCOPE
COPPER STRIP
VI(+)
VI(-)
VO(+)
VO(-)
IIIO
SUPPLY
CONTACT RESISTANCE
CONTACT AND
DISTRIBUTION LOSSES
LOAD
ηVO(+) VO(–)–[]IO
VI(+) VI(–)–[]II
------------------------------------------------
⎝⎠
⎛⎞
100
×=
10 Lineage Power
Data Sheet
April 2008
18 Vdc to 36 Vdc Inputs; 20 W
LC020 Single-Output Series Power Module:
Feature Descriptions (continued)
Remote On/Off
Two remote on/off options are available. Positive logic remote on/off turns the module on during a logic high volt-
age on the REMOTE ON/OFF pin, and off during a logic low. Negative logic device code suffix of “1,” remote on/off
turns the module off during a logic high and on during a logic low.
To turn the power module on and off, the user must supply a switch to control the voltage between the on/off termi-
nal and the VI(–) terminal (Von/off). The switch can be an open collector or equivalent (see Figure 19). A logic low is
Von/off = –0.7V to 1.2 V. The maximum Ion/off during a logic low is 1 mA. The switch should maintain a logic low volt-
age while sinking 1 mA.
During a logic high, the maximum Von/off generated by the power module is 6 V. The maximum allowable leakage
current of the switch at Von/off = 6 V is 50 µA.
The module has internal capacitance to reduce noise at the ON/OFF pin. Additional capacitance is not generally
needed and may degrade the start-up characteristics of the module.
8-758
Figure 19. Remote On/Off Implementation
Output Voltage Adjustment
Output voltage trim allows the user to increase or decrease the output voltage set point of a module. This is accom-
plished by connecting an external resistor between the TRIM pin and either the VO(+) or VO(–) pins. With an exter-
nal resistor between the TRIM and VO(+) pins (Radj-down), the output voltage set point (VO, adj) decreases. With an
external resistor between the TRIM pin and VO(–) pin (Radj-up), VO,adj increases.
The following equations determine the required external resistor value to obtain an output voltage change of Δ%:
Device a b c d –5% VO Radj-down +5% VO Radj-up
LC020F 14.0 51.10 5.19 2.70 110.9 kΩ52.8 kΩ
LC020A 4.02 16.90 2.01 2.0 19.3 kΩ23.3 kΩ
LC020B 15.40 15.40 1.58 9.80 246.5 kΩ16.0 kΩ
LC020C 21.50 16.90 1.76 12.24 356.3 kΩ18.2 kΩ
+
Ion/off
-
Von/off
REMOTE
ON/OFF
VI(+)
VI(-)
Radj-down cd 100 Δ%–()100–⋅[]
Δ%
--------------------------------------------------------------b–kΩ=
Radj-up 100a
dΔ⋅ %
-----------------b–kΩ=
Lineage Power 11
Data Sheet
April 2008 18 Vdc to 36 Vdc Inputs; 20 W
LC020 Single-Output Series Power Module:
Feature Descriptions (continued)
Output Voltage Adjustment (continued)
The adjusted output voltage cannot exceed 110% of
the nominal output voltage between the VO(+) and
VO(–) terminal.
The modules have a fixed current-limit set point. There-
fore, as the output voltage is adjusted down, the avail-
able output power is reduced. In addition, the minimum
output current is a function of the output voltage. As the
output voltage is adjusted down, the minimum required
output current can increase.
Output Overvoltage Protection
The output overvoltage clamp consists of control cir-
cuitry, independent of the primary regulation loop, that
monitors the voltage on the output terminals. The con-
trol loop of the protection circuit has a higher voltage
set point than the primary loop (see Feature Specifica-
tions table).
In a fault condition, the overvoltage clamp ensures that
the output voltage does not exceed VO, clamp, max. This
provides a redundant voltage control that reduces the
risk of output overvoltage.
Synchronization (Optional)
The unit is capable of external synchronization from an
independent time base with a switching rate of
256 kHz. The amplitude of the synchronizing pulse
train is TTL compatible and the duty cycle ranges
between 40% and 60%. Synchronization is referenced
to VIN(+).
Thermal Considerations
Introduction
The LC020 power module operates in a variety of ther-
mal environments; however, sufficient cooling should
be provided to help ensure reliable operation of the
unit. Heat-dissipating components inside the unit are
thermally coupled to the case. Heat is removed by con-
duction, convection, and radiation to the surrounding
environment. Proper cooling can be verified by mea-
suring the case temperature. Peak case temperature
(TC) occurs at the position indicated in Figure 20.
8-1265
Note: Dimensions are in millimeters and (inches).
Figure 20. Case Temperature Measurement
Location
Note that the view in Figure 20 is of the metal surface
of the module—the pin locations shown are for
reference. The temperature at this location should not
exceed 100 °C. The output power of the module should
not exceed the rated power for the module as listed in
the Ordering Information table.
Heat Transfer Without Heat Sinks
Increasing airflow over the module enhances the heat
transfer via convection. Figure 21 shows the maximum
power that can be dissipated by the module without
exceeding the maximum case temperature versus local
ambient temperature (TA) for natural convection
through 3.0 ms–1 (600 ft./min.).
Note that the natural convection condition was mea-
sured at 0.05 ms–1 (10 ft./min.) to 0.1 ms–1 (20 ft./min.);
however, systems in which these power modules may
be used typically generate natural convection airflow
rates of 0.3 ms–1 (60 ft./min.) due to other heat dissipat-
ing components in the system. Use of Figure 21 is
shown in the following example.
Example
What is the minimum airflow necessary for an LC020A
operating at high line, an output current of 2.0 A, and a
maximum ambient temperature of 83 °C?
1212 Lineage Power
Data Sheet
April 2008
18 Vdc to 36 Vdc Inputs; 20 W
LC020 Single-Output Series Power Module:
Thermal Considerations (continued)
Heat Transfer Without Heat Sinks (continued)
Solution:
Given: VI = 36 V, IO = 2.0 A, TA = 83 °C
Determine PD (Figure 23): PD = 2.9 W
Determine Airflow (Figure 21): v = 1.0 ms–1
(200 ft./min.)
8-1264
Figure 21. Forced Convection Power Derating with
No Heat Sink; Either Orientation
1-0337
Figure 22.LC020F Power Dissipation vs. Output
Current, TA = 25 °C
8-1371
Figure 23. LC020A Power Dissipation vs. Output
Current, TA = 25 °C
1-0338
Figure 24.LC020B Power Dissipation vs. Output
Current, TA = 25 °C
1-0336
Figure 25.LC020C Power Dissipation vs. Output
Current, TA = 25 °C
30 50 90
0
1.0
5.0
AMBIENT TEMPERATURE, T A (˚C)
POWER DISSIPATION, PD (W)
40
1.5
2.0
2.5
3.0
3.5
60
0.5
70 80
4.0
4.5
5.5
6.0
6.5
100
3.0 ms
-1
(600 ft./min.)
NATURAL
CONVECTION
2.0 ms
-1
(400 ft./min.)
1.0 ms
-1
(200 ft./min.)
0.5 ms
-1
(100 ft./min.)
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
POWER DISSIPATION, PD (W)
OUTPUT CURRENT, IO (A)
0.4 0.9 1.4 1.9 2.4 2.9 3.4 3.9
VI = 36 V
VI = 27 V
VI = 18 V
0.0 0.5 1.0 2.0 2.5 3.0 3.5
0
5
6
7
8
9
OUTPUT CURRENT, IO
(A)
POWER DISSIPATION, PD (W)
4
4.01.5
3
VI = 36 V
VI = 28 V
VI = 18 V
1
2
VIN = 18 V
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
POWER DISSIPATION, PD (W)
OUTPUT CURRENT, IO (A)
0.16 0.36 0.56 0.76 0.96 1.16 1.36 1.56
VI = 36 V
VI = 27 V
VI = 18 V
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
POWER DISSIPATION, PD (W)
OUTPUT CURRENT, IO (A)
0.13 0.33 0.53 0.73 0.93 1.13 1.3
3
VI = 36 V
VI = 27 V
VI = 18 V
Lineage Power 13
Data Sheet
April 2008 18 Vdc to 36 Vdc Inputs; 20 W
LC020 Single-Output Series Power Module:
Thermal Considerations (continued)
Module Derating
The derating curves in Figure 21 were obtained from measurements obtained in an experimental apparatus shown
in Figure 26. Note that the module and the printed-wiring board (PWB) that it is mounted on are vertically oriented.
The passage has a rectangular cross section.
8-1126
Note: Dimensions are in millimeters and (inches).
Figure 26. Experimental Test Setup
Layout Considerations
Copper paths must not be routed beneath the power module standoffs.
AIR VELOCITY
AND AMBIENT
TEMPERATURE
MEASURED
BELOW THE
MODULE
AIRFLOW
12.7 (0.50)
FACING PWB
MODULE
76 (3.00)
PWB
14 Lineage Power
Data Sheet
April 2008
18 Vdc to 36 Vdc Inputs; 20 W
LC020 Single-Output Series Power Module:
Outline Diagram
Dimensions are in millimeters and (inches).
Tolerances: x.x ± 0.5 mm (0.02 in.), x.xx ± 0.25 mm (0.010 in.). Pin-to-pin tolerances are not cumulative.
Note: For standard modules, VI(–) is internally connected to the case.
8-1198
Top View Pin Function
1 Remote
On/Off
2 No Connec-
tion (optional-
sync feature)
3 VI(–)/CASE=
4VI(+)
5 Case Pin
(pin optional)=
6TRIM
7V
O(–)
8VO(+)
Side View
† Case is not con-
nected to pin 3 if
optional case pin 5 is
specified.
Bottom View
Lineage Power 15
Data Sheet
April 2008 18 Vdc to 36 Vdc Inputs; 20 W
LC020 Single-Output Series Power Module:
Recommended Hole Pattern
Component-side footprint.
Dimensions are in millimeters and (inches).
8-1198
Ordering Information
Optional features may be ordered using the device code suffixes shown. To order more than one option, list suffixes in
numerically descending order.
Please contact your Lineage Power Account Manager or Field Application Engineer for pricing and availability.
Input Voltage Output Voltage Output Power Device Code Comcode
28 V 3.3 V 13.2 W LC020F 107681025
28 V 5 V 20 W LC020A 107640815
28 V 12 V 20 W LC020B 107681009
28 V 15 V 20 W LC020C 107681017
Option Device Code Suffix
Short pin: 2.79 mm ± 0.25 mm (0.110 in. ± 0.010 in.) 8
Case ground pin 7
Synchronization 3
Negative logic on/off 1
CASE OUTLINE
DRILL HOLE OF APPROX.
2.54 (0.100) DIAMETER
TO RECESS STANDOFFS
IF LOWER HEIGHT IS NEEDED
5.08
(0.200)
12.7
(0.50)
2.54 (0.100)
50.8 (2.00)
10.16
(0.400)
20.32
(0.800)
37.8
(1.49)
3.43
(0.135)
38.86
(1.530)
7.62 (0.300)
12.4
(0.49)
17.78
(0.700)
50.8
(2.00
45.72 (1.800)
15.24
(0.600)
2.5
(0.10)
Data Sheet
April 2008
18 Vdc to 36 Vdc Inputs; 20 W
LC020 Single-Output Series Power Module:
April 2008
DS99-140EPS (Replaces DS99-139EPS)
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Lineage Power reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or
application. No rights under any patent accompany the sale of any such product(s) or information.
© 2008 Lineage Power Corporation, (Mesquite, Texas) All International Rights Reserved.
