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OBSOLETE PRODUCT
SLC100
Contact factory for replacement model
40 Amp Single
Output Quarter
Brick DC/DC
Converter
● Industry Standard Footprint & Size 2.28” x 1.45”
● High Efficiency
● Wide Input Voltage Range: 36 – 75VDC
● Output Voltages: 1.0V,1.2 V, 1.5V,
1.8V, 2.0V, 2.5V, 3.3V, 5.0V & 12V
● Output VoltageTrim Function
● Remote Sense for output compensation
● Remote ON/OFF control referenced to
input side (Positive or Negative Logic)
● Output Current Limit
● No Minimum Load Requirement
The SLC100 Series is a 40 Amp single
output, low-profile DC-DC converter in
an industry standard package of 2.28” x
1.45” x 0.40”. The SLC100 uses unique
proprietary technologies to deliver ultrahigh efficiencies and excellent thermal
performance. It includes extensive
control and protection features for
maximum flexibility and provides a
versatile solution for a whole range of
● SMD Models with Position PerfectTM
Interconnects
● Isolation Voltage of 2000 VDC
● Fixed Frequency Operation
● UL/CUL 60950 recognized (US & Canada),
basic insulation rating
● Meets TNV-SELV Isolation Requirements
● Meets Conducted Emissions Requirements
of FCC Class B and EN55022 Class B
with External Filter
● No Heatsink Required
● Thermal Shutdown
● Input Undervoltage Lockout
applications with its input voltage range of
36-75 VDC and output voltages between
1.0VDC and 12.0VDC.
The power dissipation of the SLC100
series is so low that a heat sink is not
required. Thermal derating curves are
provided indicating maximum allowable
output current versus airflow and ambient
temperature. The product features fast
dynamic response characteristics and low
output ripple critical for low voltage
applications. SLC DC-DC converter
modules are certified to UL/CUL 60950,
and VDE to EN60950. It meets CISPR22/
EN55022/FCC15J Class B specs for EMI
levels with external filtering.
This high quality and highly reliable
product is competitively priced and an ideal
solution for distributed power, telecoms
and datacom applications.
PRODUCT SELECTION CHART
MODEL
SLC100
SLC100
SLC100
SLC100
SLC100
SLC100
SLC100
SLC100
SLC100
NOMINAL
INPUT
VOLTAGE
(VDC)
48
48
48
48
48
48
48
48
48
RATED
OUTPUT
VOLTAGE
(VDC)
1.0
1.2
1.5
1.8
2.0
2.5
3.3
5.0
12.0
OUTPUT CURRENT
MIN
RATED
LOAD(A)
OUTPUT (A)1
0.0
40
0.0
40
0.0
40
0.0
40
0.0
40
0.0
40
0.0
30
0.0
20
0.0
8.3
INPUT
CURRENT
AT RATED LOAD (A)
(48Vin)
TBD
1.80
2.20
TBD
TBD
TBD
TBD
TBD
TBD
EFFICIENCY
(%)
TYPICAL
TBD
80
82
TBD
TBD
TBD
TBD
TBD
TBD
* Note 1: Maximum output current for SMD Models is 25A.
Product: www.cdpoweronline.com
SLC100 Rev B 5/2004
1
ABSOLUTE MAXIMUM RATINGS, ALL MODELS
PARAMETER
Input Voltage-Operating
Input Voltage-Operating
CONDITIONS
MIN
TYP
Continuous
Transient (100 mS)
Operating Ambient Temperature
-40
Storage Temperature
-40
Output Short Circuit Duration
MAX
UNITS
75
VDC
TBD
VDC
+100
°C
+125
°C
+300
°C
Continuous
Lead Temperature (Soldering, 10 sec max)
COMMON ELECTRICAL SPECIFICATIONS, ALL MODELS
Specifications are at TA = +25°C, Airflow = 300LFM (1.5m/s) at nominal input voltage unless otherwise specified.
PARAMETER
CONDITIONS
MIN
TYP
36
48
MAX
UNITS
COMMON ELECTRICAL SPECIFICATIONS
INPUT
Voltage Range
75
VDC
ISOLATION
Capacitance
Resistance
VDC
2000
Input/Output Isolation Voltage
Input to Output
Input to Output
pF
2000
MW
10
FEATURES
Turn On Time
Output to within 1% of Vnom
-10
5
+10
+120
+140
Remote Sense Compensation
Output Voltage Trim Range
5.00 mS
% of VNOM
% of VNOM
Output Over Voltage Protection
% of VNOM
Over Temperature Shutdown
Shutdown
TBD
°C
Turn On
TBD
°C
Input Under Voltage Protection
Turn Off
Turn Off
Lockout Hysteresis Voltge
31.50
32.50
0
32.50
VDC
33.70
VDC
2.2
VDC
ON/OFF Logic Function
mA
Logic Low Ion/off
Logic Low Von/off
TBD
Logic High Ion/off
0.8
Logic High Von/off
Open
Collector
TBD
VDC
μA
VDC
GENERAL
Switching Frequency
MTTF (per Telcordia TR-NWT-000332)
TBD
200
TBD
KHz
Hrs
2
MECHANICAL (THROUGH HOLE)
PIN FUNCTIONS
1
2
3
4
5
6
7
8
+Vin
Remote On/Off
-Vin
-Vout
- Sense
Trim
+ Sense
+Vout
NOTES:
General Tolerance; ±.015
Pin Locations/Diameters: ±.005
Dimensions are in inches
[Millimeters]
Pin material: Copper
Pin Finish: Matte Tin over Nickel
Converter weight: [30.8g]
UL/TUV Standards require a clearance
greater than 0.06” between input and
output for Basic insulation. This should be
considered if copper traces are used on
the top side of the board under the converter unit. Ferrite cores are considered
part of the input/primary circuit.
MECHANICAL (SMT)
Interconnect FUNCTIONS
1
2
3
4
5
6
7
8
+Vin
Remote On/Off
-Vin
-Vout
- Sense
Trim
+ Sense
+Vout
NOTES:
General Tolerance; ±.015
Interconnect Locations/
Diameters: ±.005
Dimensions are in inches
[Millimeters]
Pin material: Copper
Pin Finish: Matte Tin over Nickel
Converter weight: [30.8g]
UL/TUV Standards require a clearance
greater than 0.06” between input and
output for Basic insulation. This should be
considered if copper traces are used on
the top side of the board under the converter unit. Ferrite cores are considered
part of the input/primary circuit.
* Interconnect co-planarity within 0.004”
SLC100 Rev B
5/2004
3
ORDERING INFORMATION
MODEL NUMBER
SLC100 - 1
SLC100 - 2
SLC100 - 3
SLC100 - 4
SLC100 - 5
SLC100 - 6
SLC100 - 7
SLC100 - 8
SCL100 - 9
SLC100 - 10
SLC100 - 11
SLC100 - 12
SLC100 - 13
SLC100 - 14
SLC100 - 15
SLC100 - 16
SLC100 - 17
SLC100 - 18
Vout (Vdc)
1.0
1.2
1.5
1.8
2.0
2.5
3.3
5.0
12.0
1.0
1.2
1.5
1.8
2.0
2.5
3.3
5.0
12.0
PINOUT
Through Hole
Through Hole
Through Hole
Through Hole
Through Hole
Through Hole
Through Hole
Through Hole
Through Hole
SMD
SMD
SMD
SMD
SMD
SMD
SMD
SMD
SMD
LOGIC
Positive
Positive
Positive
Positive
Positive
Positive
Positive
Positive
Positive
Positive
Positive
Positive
Positive
Positive
Positive
Positive
Positive
Positive
MODEL NUMBER
SLC100 - 19
SLC100 - 20
SLC100 - 21
SLC100 - 22
SLC100 - 23
SLC100 - 24
SLC100 - 25
SLC100 - 26
SCL100 - 27
SLC100 - 28
SLC100 - 29
SLC100 - 30
SLC100 - 31
SLC100 - 32
SLC100 - 33
SLC100 - 34
SLC100 - 35
SLC100 - 36
Vout (Vdc)
1.0
1.2
1.5
1.8
2.0
2.5
3.3
5.0
12.0
1.0
1.2
1.5
1.8
2.0
2.5
3.3
5.0
12.0
PINOUT
Through Hole
Through Hole
Through Hole
Through Hole
Through Hole
Through Hole
Through Hole
Through Hole
Through Hole
SMD
SMD
SMD
SMD
SMD
SMD
SMD
SMD
SMD
LOGIC
Negative
Negative
Negative
Negative
Negative
Negative
Negative
Negative
Negative
Negative
Negative
Negative
Negative
Negative
Negative
Negative
Negative
Negative
4
APPLICATION NOTES
When using remote sense with dynamic loads, the
transient response at the point of load may be limited
by the inductance present in the power lines. Severe
load steps may require the addition of a capacitor CL
across the output lines. When the load demands an
immediate increase in load current, this capacitor helps
to supply a portion of the current and reduces the burden on the converter.
Remote Sense
The remote sense feature of the SLC100 can be used
to compensate for voltage drops in the output power
lines by sensing output voltage directly at the point of
load. To enable this feature, connect the +Sense and
–Sense pins to the +Vout and –Vout pins, respectively,
at the point in the circuit where the tightest regulation
is required (Figure 1). The sense leads conduct very
little current compared with the power leads and therefore provide a more accurate indication of load voltage
for regulation purposes. This enables the converter to
increase (or decrease) its output voltage to compensate
for any load distribution losses, allowing for a more
precise load voltage. Refer to the product data sheet
for the maximum output voltage compensation range of
+ Sense
- Vin
If remote sensing is not desired then +Sense and
-Sense must be tied to their respective outputs for
proper operation.
+ Vout
+ Vin
ON/OFF
When the load is physically distanced from the converter, the inductance of the power leads, and any bypass conductance at the load, can result in increased
phase shift in the converter’s feedback loop, causing
instability. This situation can be eliminated by inserting
bypass capacitors (CB) from the outputs to the sense
leads directly at the output pins. These capacitors decouple any AC on the power lines and assure that only
the DC voltage is sensed.
SLC100
Trim
(Top View)
- Sense
- Vout
CB
•
CL
Load
CB
•
Figure 1 – Remote Sensing
In general, the line resistance, or load drop, between
the output pins of the converter and load should be
minimized. Using remote sense, a large line resistance,
with a regulated load voltage, will result in a higher
output voltage at the output of the DC/DC Converter. To
prevent exceeding the converter’s output power limits,
a higher output voltage will require a reduction in the
maximum allowable output current in accordance with
the voltage/current power relationship. To minimize
the line resistance between the converter and the load,
the converter should be placed as close to the load as
possible. Line resistance can further be decreased by
using heavy gauge wire or by increasing the cross sectional area of the PC board traces.
Output Voltage Trim
The SLC100’s output voltage may be adjusted high or
low by an amount indicated on the product data sheet.
As shown in Figure 2, to raise the converter’s output
voltage a resistor must be placed between the Trim pin
and +Vout pin.
SLC100 Rev B
+ Vout
+ Vin
+ Sense
ON/OFF
- Vin
SLC100
Trim
(Top View)
- Sense
RT
Load
- Vout
Figure 2 – Trim Up Circuit
5/2004
5
APPLICATION NOTES
Remote ON/OFF Function
To lower the converter output voltage a resistor must be
placed between the Trim pin and -Vout pin as shown in
Figure 3.
+ Vout
+ Vin
+ Sense
ON/OFF
SLC100
Trim
(Top View)
- Sense
Load
RT
- Vout
- Vin
Figure 3 – Trim Down Circuit
The resistance value required to achieve the desired
amount of positive/negative trim can be determined by
referring to the trim table for each model. If trimming is
not desired then the Trim pin may be left open.
In addition to the resistor values provided in the trim
tables, the following equations can be use to calculate
the required resistor value for a desired output voltage.
These equations apply for the 1.5V and above models.
For 1.2V models the trim tables must be used.
Remote ON/OFF Control Function
The SLC100 is equipped with a primary ON/OFF pin
used to remotely turn the converter on or off via a system
signal. The input is TTL open-collector and/or FET opendrain compatible. For the positive logic model a system
logic low signal will turn the unit off. For negative logic
models a system logic high signal will turn the converter
off. For negative logic models where no control signal
will be used the ON/OFF pin should be connected
directly to –Vin to ensure proper operation. For positive
logic models where no control signal will be used the
ON/OFF pin should be left open.
+ Vout
+ Vin
+ Sense
ON/OFF
SLC100
(Top View)
- Vin
Trim
-
Sense
- Vout
Control Signal
Protective Functions
Temperature Shutdown
The over temperature shutdown feature of the SLC100
will cause the unit to shutdown at a typical pwb temperature of TBD. This protective feature is comprised
of a thermistor in the units control loop. At a temperature of TBD this circuit will cause the PWM to go into
an idle mode, resulting in no output from the converter
and preventing damage to the converter components.
When the temperature of the unit drops below TBD the
fault condition will clear and the converter will resume
normal operation. If the cause of the over temperature
condition is not identified and corrected the unit will
continue to cycle on and off indefinitely.
Input Under-Voltage Shutdown
The nominal input voltage for the SLC100 is 48Vdc.
Once turned on reducing the input voltage to 32.5 Vdc
nominal will shut down the device. At an input voltage
less than 32.5V the under-voltage sensing circuit will
send a signal to the PWM causing it to go into idle
mode. This will result in no output from the converter,
protecting the unit from a high input current condition.
When the input voltage returns to a level above 32.5V
the unit will return to normal operation. The unit will
typically turn on at an input voltage of 33.7V nominal
as indicated on the Product Data Sheet. This is due to
hysterisis designed into the protective circuit to prevent
excessive cycling of the converter.
Brick Wall Current Limiting
To protect against fault or short-circuit conditions on
the output, each module is equipped with current-limiting circuitry designed to provide continuous protection.
After reaching the current limit point (typically 20%
above the rated output current), the voltage will range
between its rated value and zero, depending upon the
amount of overload. The unit will remain in operation
continuously during this period down to a short-circuit
condition. Once the short or overload has been eliminated, the output voltage will return to normal without
cycling the input power.
Figure 4 – Remote ON/OFF Control Circuit
6
APPLICATION NOTES
Output Over-Voltage Protection
Start-Up, ON/OFF and Transient Response
The SLC100 has an output over voltage protection
(OVP) circuit which monitors its own output voltage. If
the output voltage of the converter exceeds between
120% and 140% of the nominal rating, the OVP circuit
will shut down the converter. Once the OVP has been
tripped the unit will need to be reset by cycling the input
power or by toggling the ON/OFF power before normal
operation can resume.
For each model, waveforms are provided showing
output voltage response and timing of input voltage
power up/down, remote ON/OFF state change and
load current transient responses. Output voltage
transient responses are provided for step load changes
of 50% to 75% &
75% to 50% of rated load current. Waveforms for each
SLC100 units with a non-latching OVP feature are available on request. Please contact the factory for further
details.
Efficiency Performance
Safety
The SLC100 meets safety requirements per UL/CUL
60950 and VDE EN60950, basic insulation rating.
EMC/EMI Considerations
Efficiency data for each model was determined as
a function of both load current and input voltage.
Efficiency vs. Input Voltage was measured at full load,
ambient temperature of 25oC and airflow of 300LFM.
Efficiency vs. Load Current was measured at 25oC, a
nominal input voltage of 48Vdc and airflow of 300LFM.
Graphs are provided for each model in their respective
Analysis pending.
Performance Characterization
Thermal Derating
Maximum output current vs. ambient temperature at
various airflow rates has been determined for each
model of the SLC100. Each model was analyzed over
an ambient temperature range of 0 to 85oC and at air
flows up to 600LFM. Temperature limits for thermal
derating curves were TBD C for semiconductor junction
temperature and TBD C for board temperature.
SLC100 Rev B
5/2004
7
SLC100 1.2VOUT ELECTRICAL SPECIFICATIONS
Specifications are at TA = +25°C, Airflow = 300LFM (1.5m/s) at nominal input voltage unless otherwise specified.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
INPUT
INPUT
Maximum Input Current
Inrush Charge
Reflected Ripple Current
Input Voltage Ripple Rejection
No Load Input Current
Full Load; Vin = 36Vdc
Vin = 75Vdc
Full Load, XXMhz Bandwidth
Full Load (100Hz-1KHz)
1.80
A
0.180
mC
TBD
No Load
Disabled Input Current
55
dB
mA
3.0
mA
2
mA
7
A
Quiescent Input Current
Recommended Input Fuse
mApk-pk
-30
Fast blow external fuse
OUTPUT
Voltage Setpoint
OUTPUT
Voltage Range
1.182
Over all conditions of line,
load and temperature
1.2
1.218
TBD
Vdc
Vdc
TBD
0.05
0.10
% of Vnom
Load Regulation
0.25
0.50
% of Vnom
Output Ripple
100
120
mVpk-pk
Line Regulation
Output Current Range
0
401
Output Current Limit Inception
44
48
Efficiency
Transient Response
80
50% to 75% Load Step at di/dt
A
A
%
TBD
=0.1 A/mS; Cext =TBD
Peak Deviation
TBD
mV
Settling Time
TBD
mS
50,000
48
mF
W
External Load Capacitance
Rated Power
* Note 1: Maximum output current for SMD Models is 25A.
8
SLC100 1.5VOUT ELECTRICAL SPECIFICATIONS
Specifications are at TA = +25°C, Airflow = 300LFM (1.5m/s) at nominal input voltage unless otherwise specified.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
INPUT
Maximum Input Current
Full Load; Vin = 36Vdc
2.20
A
Vin = 75Vdc
0.180
mC
Full Load, XXMhz Bandwidth
TBD
INPUT
Inrush Charge
Reflected Ripple Current
Input Voltage Ripple Rejection
Full Load (100Hz-1KHz)
No Load Input Current
Disabled Input Current
-30
dB
mA
75
No Load
3.0
mA
2
mA
7
A
1.520
Vdc
Quiescent Input Current
Recommended Input Fuse
mApk-pk
Fast blow external fuse
OUTPUT
Voltage Setpoint
OUTPUT
Voltage Range
1.490
Over all conditions of line,
load and temperature
1.5
TBD
Vdc
TBD
Line Regulation
0.05
0.10
% of Vnom
Load Regulation
0.25
0.50
% of Vnom
100
mVpk-pk
Output Ripple
Output Current Range
0
Output Current Limit Inception
44
Efficiency
82
Transient Response
50% to 75% Load Step at di/dt
1
40
A
48
A
%
TBD
=0.1 A/mS; Cext =TBD
Peak Deviation
TBD
mV
Settling Time
TBD
mS
50,000
48
mF
W
External Load Capacitance
Rated Power
* Note 1: Maximum output current for SMD Models is 25A.
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
USA:
Mansfield (MA), Tel: (508) 339 3000, email: [email protected]
Canada:
Toronto, Tel: (866) 740 1232, email: [email protected]
UK:
Milton Keynes, Tel: +44 (0)1908 615232, email: [email protected]
France:
Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: [email protected]
Germany: München, Tel: +49 (0)89-544334-0, email: [email protected]
Japan:
Tokyo, Tel: 3-3779-1031, email: [email protected]
Osaka, Tel: 6-6354-2025, email: [email protected]
China:
Shanghai, Tel: +86 215 027 3678, email: [email protected]
Guangzhou, Tel: +86 208 221 8066, email: [email protected]
www.murata-ps.com email: [email protected] ISO 9001 & ISO 14001 REGISTERED
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
notice.
© 2009 Murata Power Solutions, Inc.
Singapore: Parkway Centre, Tel: +65 6348 9096, email: [email protected]
9
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