LSM-1/10-D12EB [MURATA]
10 Amp DC/DC Power Converter Evaluation Boards; 10安培的DC / DC电源转换器评估板
| 型号： | LSM-1/10-D12EB |
| 厂家： | 
muRata |
| 描述： | 10 Amp DC/DC Power Converter Evaluation Boards |
| 文件： | 总5页 (文件大小：217K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LSM-EB Series
10 Amp DC/DC Power Converter Evaluation Boards
Designed to ease the evaluation of today's subminiature surface-mount technol-
ogy (SMT) 10 Amp single output DC/DC power converters, DATEL's LSM-EB
series includes twenty four models for all popular logic family output voltages and
common input power voltages. Each LSM-EB model consists of a 4.31-inch square
circuit board including a DATEL LSM-series surface mounted DC/DC converter,
input/output banana jacks, trim circuits and various passive components.
Rather than hand wiring to small mounting pads, the user can more accurately
test real world electrical and thermal performance on a mounting board with a full
ground plane and input Pi filter. The circuit board is mounted on four removable
one-inch standoffs threaded for 4-40 screw attachment.
The heart of the LSM-EB evaluation board is DATEL's advanced single output
non-isolated LSM series DC/DC converter. Running from either 3.3 Volt, 5 Volt or
12 Volt DC input power, the LSM series provides high quality point-of-load (POL)
output power for CPU's, memory systems, microcontrollers and large array logic.
See DATEL's LSM Series data sheet for full information.
Features
N Rapid evaluation of DATEL LSM series
10 Amp DC/DC converters
N Twenty-four models ranging from 0.8V
to 5V single outputs at 10 Amps max.
Ideal for mixed logic families.
N For CPU, logic array and custom
controller applications
N Avoids initial user development of
SMT mounting systems while offering
realistic evaluation of a surface-mounted
converter
N Rugged banana jack I/O connections
plus input Pi L-C filter
N Provision for external shut-down control
inputs and trim circuit evaluation
N Includes test points for oscilloscope
evaluation of performance
J3
J1
4
+VOUT
+VIN
+VOUT
+VIN
2
L1
1μH
6
5
+SENSE
TRIM
+
+
+
+
C5
33μF
C4
33μF
C2
22μF
C1
22μF
ON/OFF
CONTROL
GND
3
1
–VOUT
–VIN
J2
J4
PIN 2
PIN 3
1
2
J1 THRU J4
ARE BANANA JACKS
ON/OFF CONTROL
R3
R4
TRIM DOWN
TRIM UP
3
DIP SWITCH, SW1
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OPEN
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MDC_LSM_EB.B01 Page 1 of 5
LSM-EB Series
10 Amp DC/DC Power Converter Evaluation Boards
Diagnostic Test Points
Specification Summary ~
DATEL LSM series ~
DC/DC Converter type
Input Voltage
Four pins are provided for a combination of measurements. Pins 1 and 2
sense the voltage immediately at the DC/DC inputs. Pins 3 and 4 display the
output voltage. Connect these pins either to an oscilloscope or voltmeter.
3.3, 5 or 12 Volts (see Ordering Guide)
Output Voltage
Output Current
Minimum load
0.8 to 5 Volts, (see Ordering Guide)
10 Amps, max.
If preferred, the input inductor may be bypassed by shorting J1 to Pin 1.
Zero (no minimum load)
Input and Output Terminals
banana jacks (4 locations)
Input Current Measurement
0.166-inch (4.22mm) removable
4.31" x 4.31" x 1.5" max. (including standoffs)
0.41"
A current sense resistor (not supplied) may be conveniently installed across
the input inductor from J1 to Pin 1 after removing inductor L1 with a
surface mount hot air desoldering tool. Suggested resistor values are 2 to 5
milliohms. These values will not degrade operation of the DC/DC converter
yet will develop sufficient voltage at full power for measurement by a digital
voltmeter or oscilloscope.
Outline Dimensions
Height above board
Standoffs
Four removable, 1.0" length, 4-40 threaded
Multi-layer printed circuit board
Fabrication
Operating Temp. Range
(Ambient, natural convection)
–40 to +65/+71°C
Note that the 'scope must be connected in differential mode. If preferred,
a sense resistor can also be installed in series with either ground jack
without having to remove L1. A sense resistor of several milliohms may be
conveniently fabricated with several inches of 12 or 14 gauge wire.
~ See DATEL's LSM series data sheet for full information on the DC/DC converter.
Maximum operating temperature ranges are dependent on model type. See the LSM series
converter data sheet. Temperature range may be extended with forced cooling.
The standoffs are not connected to the board ground plane. Use a discrete connection if you
wish to ground the standoffs.
Digital On/Off Control
The top section (SW1-A) of the 3-pole DIP switch enables the power output
of the converter.You may either do this manually with the rocker switch or
connect an external logic gate to the pole nearest the output terminals on
the back side of the board. Such an external gate should be referenced to the
converter's power ground and use 5V TTL/LS logic.
Component Locations
The board is laid out with filter capacitors and the inductor on the input and
a filter capacitor on the output. These represent typical values that you would
normally use in your application therefore, performance should be similar.
Also, the values comply with those recommended in the LSM data sheet.
A small reed relay or an open collector NPN transistor or FET may also be
used to control the DC/DC with the collector tied to the same control terminal
pole on the DIP switch. The converter's on/off control includes an internal
pullup resistor to +5V. The pullup is 5 to 14 kilohms, depending on model.
Leave the on-board DIP switch open if you use any of these external controls.
Use short leads if you install an external control.
The two trim resistor locations (R3 and R4) are left open for the user to install
suitable trim resistors, either as axial lead resistors or "0805" surface mount
resistors. White silkscreening on the board identifies all components.
Usage Guidelines
If the on/off control is left open, the converter will operate normally. Always
make sure the DC/DC is powered up before activating the on/off control.
Refer to the LSM series data sheet for full details on the following topics.
Input/Output Connections
Trim Circuits
Holding the module upright, input power is applied to the left set of banana
jacks. Output power is extracted from the right banana jacks. Please note
that both ground terminals on the bottom are connected together internally.
To retain high system performance, be sure to use the proper gauge wiring
(12 gauge or larger is recommended). The hex standoffs are not connected
to the ground plane.
The bottom two sections of the 3-pole DIP switch connects the converter's
single trim input to two external resistor positions immediately to the right of
the switch body. See the schematic diagram. The upper resistor corresponds
to the leg connecting to the +VOUT terminal and the bottom resistor connects
to –VOUT. The switches allow you to temporarily disconnect the trim resistors
to evaluate their effects.
Use as short wiring as possible. For longer power wiring, to prevent noise
radiation, consider either twisting the leads and/or enclosing the leads in a
grounded copper shield.
You may either install discrete resistors in these two through-hole or surface
mount locations or you may wire a closely-mounted 20 kilohm potentiometer
between the board pads. Use short leads to prevent noise pickup and
instability. Study the LSM data sheet for the required resistor values.
Input Pi Filter
A classic Pi filter is provided on the converter's input. While this filter
is not required if you can assure that the input voltage at the DC/DC
terminals remains within the input voltage range at all times and is reason-
ably low noise, many applications will see improved performance if the filter
is employed. The filter is also useful for switching output loads and for
evaluation of input ripple current. The inductor and associated capacitors are
selected to prevent saturation and excessive power dissipation at the full 10
Amp output current while avoiding inductive spike damage to the DC/DC. The
capacitors are chosen for low ESR.
Thermal Considerations
The DC/DC converter, when mounted on the evaluation board, is rated up
to approximately +65 degrees Centrigrade operation (depending on model)
using natural convection at low or moderate altitude. The converter is pro-
tected by thermal shutdown if overcurrent, higher altitude and/or overtemper-
ature operation is attempted. Some heat is extracted through the mounting
pads. Higher temperature operation is available with forced cooling. Carefully
study the derating curves on the LSM data sheet.
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MDC_LSM_EB.B01 Page 2 of 5
2
LSM-EB Series
10 Amp DC/DC Power Converter Evaluation Boards
1.5 MAX.
(38.1)
4.31 (109.47)
3.94 (100.08)
A
1.0
(25.4)
A
(4) HEX
STANDOFFS
4-40 THREAD
4.31
3.94
(109.47)
(100.08)
TOP VIEW
DIMENSIONS ARE IN INCHES (MM)
I/O Connections
Terminal
Function
+VIN external
–VIN external
+VOUT external
–VOUT external
DC/DC +VIN
DC/DC –VIN
J1
J2
J3
J4
Pin 1
Pin 2
Pin 3
Pin 4
DC/DC –VOUT
DC/DC +VOUT
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MDC_LSM_EB.B01 Page 3 of 5
3
LSM-EB Series
10 Amp DC/DC Power Converter Evaluation Boards
Distributed Bus Architecture
uted to several POL DC/DC's. DBA's also retain very high system efficiency,
important for battery operated and standby applications.
The LSM series DC/DC converters are an ideal solution for modern interme-
diate bus architecture (IBA) or distributed bus architecture (DBA) applications
used in telecommuncations and dedicated stand-alone systems. DBA's see
implementation whenever multiple final power voltages are required (each
using a dedicated single-voltage DC/DC converter) while retaining overall
system power isolation.
In the diagram below, a DATEL model SBC-12/22-L48 acts as the bus
converter from system 48 Volts to 12 Volts distributed to each POL converter.
One POL converter powers 3.3V system logic while a separate 1.2V POL
converter runs the CPU. A third 5V POL converter powers legacy I/O ports.
Notice that the 12V power leads are routed all the way back to the the bus
converter for best performance. Also observe that only one source of isolation
is required (in the bus converter) so that individual POL converters can be
lower cost non-isolated versions.
DBA's position the final DC/DC right at the load (also called Point of Load,
POL converters). This provides the best possible dynamic response, regu-
lation, and noise reduction. It also distributes the thermal load to avoid
system hotspots or concentrations of high switching currents. Since the POL
DC/DC's are non-isolated models, their physical size is reduced, making
them ideal for tape and reel automated surface mounting.
The Distributed Bus Architecture offers a lower overall system cost than using
separate bulkier isolated converters at each voltage load. And it prevents
possible crosstalk of high power digital switching signals. A final advantage
of DBA's is that the designer has a choice of where and how to interconnect
system grounds and is not restricted by a noisy system "mecca" ground.
A single system-wide master high power bus converter performs the initial
power voltage conversion. A 48Vdc input is typical with 12Vdc outputs distrib-
POINT-OF-LOAD
DC/DC CONVERTERS
LSM-5/10-D12
5VDC
I/O PORTS
DATEL
SBC-12/22-L48
BUS CONVERTER
48VDC
INPUT
POWER
(TYPICAL)
SYSTEM
LOGIC
12VDC
LSM-3.3/10-D12
LSM-1.2/10-D12
3.3VDC
LOCAL GROUNDS
AS APPROPRIATE
SYSTEM
ISOLATION
BARRIER
1.2VDC
CPU
Figure 2. Distributed Bus Architecture
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MDC_LSM_EB.B01 Page 4 of 5
4
LSM-EB Series
10 Amp DC/DC Power Converter Evaluation Boards
Ordering Guide
All Evaluation Board models have 10 Amp maximum output current and
use identical mounting and pad numbering. Three input voltages (3.3V, 5V
and 12V) are offered. DATEL will review special or custom versions of other
voltages for scheduled quantity applications.
Model Number
DC Output Voltage
0.8 Volts
DC Input Range
3 to 3.6 Volts
4.5 to 5.5 Volts
10 to 14 Volts
3 to 3.6 Volts
4.5 to 5.5 Volts
10 to 14 Volts
3 to 3.6 Volts
4.5 to 5.5 Volts
10 to 14 Volts
3 to 3.6 Volts
4.5 to 5.5 Volts
10 to 14 Volts
Model Number
DC Output Voltage
1.8 Volts
DC Input Range
3 to 3.6 Volts
4.5 to 5.5 Volts
10 to 14 Volts
3 to 3.6 Volts
4.5 to 5.5 Volts
10 to 14 Volts
3 to 3.6 Volts
4.5 to 5.5 Volts
10 to 14 Volts
4.5 to 5.5 Volts
10 to 14 Volts
10 to 14 Volts
LSM-0.8/10-D3EB
LSM-0.8/10-D5EB
LSM-0.8/10-D12EB
LSM-1/10-D3EB
LSM-1/10-D5EB
LSM-1/10-D12EB
LSM-1.2/10-D3EB
LSM-1.2/10-D5EB
LSM-1.2/10-D12EB
LSM-1.5/10-D3EB
LSM-1.5/10-D5EB
LSM-1.5/10-D12EB
LSM-1.8/10-D3EB
LSM-1.8/10-D5EB
LSM-1.8/10-D12EB
LSM-2/10-D3EB
LSM-2/10-D5EB
LSM-2/10-D12EB
LSM-2.5/10-D3EB
LSM-2.5/10-D5EB
LSM-2.5/10-D12EB
LSM-3.3/10-D5EB
LSM-3.3/10-D12EB
LSM-5/10-D12EB
0.8 Volts
1.8 Volts
0.8 Volts
1.8 Volts
1.0 Volts
2.0 Volts
1.0 Volts
2.0 Volts
1.0 Volts
2.0 Volts
1.2 Volts
2.5 Volts
1.2 Volts
2.5 Volts
1.2 Volts
2.5 Volts
1.5 Volts
3.3 Volts
1.5 Volts
3.3 Volts
1.5 Volts
5.0 Volts
USA:
Canada: Toronto, Tel: (866) 740-1232, email: toronto@murata-ps.com
UK: Milton Keynes, Tel: +44 (0)1908 615232, email: mk@murata-ps.com
Mansfield (MA), Tel: (508) 339-3000, email: sales@murata-ps.com
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
www.murata-ps.com email: sales@murata-ps.com ISO 9001 REGISTERED
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Germany: München, Tel: +49 (0)89-544334-0, email: munich@murata-ps.com
Japan: Tokyo, Tel: 3-3779-1031, email: sales_tokyo@murata-ps.com
Osaka, Tel: 6-6354-2025, email: sales_osaka@murata-ps.com
Website: www.murata-ps.jp
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without
China:
Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com
Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com
notice.
© 2008 Murata Power Solutions, Inc.
04/24/08
www.murata-ps.com
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
MDC_LSM_EB.B01 Page 5 of 5
5
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