40 Amp Single Output Quarter Brick DC/DC Converter
SLSL
SLSL
SLC100C100
C100C100
C100
Corporate: www.cdtechno.com
Corporate: www.cdtechno.com
Product: www.cdpoweronline.com
zIndustry Standard Footprint & Size -
2.3” x 1.45”
zHigh Efficiency
zWide Input Voltage Range: 36 – 75VDC
zOutput Voltages: 0.8V, 1.0V,1.2 V, 1.5V,
1.8V, 2.2V, 2.5V, 3.3V & 5.0V
z Output Trim Function
zRemote Sense for output compensation
zRemote ON/OFF control referenced to
input side (Positive or Negative Logic)
zOutput Current Limit
zNo Minimum Load Requirement
zIsolation Voltage of 2000 VDC
zFixed Frequency Operation
zz
zz
zUL/CUL 60950 recognized (US & Canada),
basic insulation routing
zMeets TNV-SELV Isolation Requirements
zMeets Conducted Emissions Requirements
of FCC Class B and EN55022 Class B
with External Filter
zNo Heatsink Required
zThermal Shutdown
zInput Undervoltage Lockout
zSMD Models with Position PerfectTM
Interconnects
The SLC100 Series is a 40 Amp single
output, low-profile DC-DC converter in
an industry standard package of 2.3” x
1.45” x 0.40”. The SLC100 uses unique
proprietary technologies to deliver
ultra-high 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 applications with its input
voltage range of 36-75 VDC and output
voltages between 0.8VDC 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.
NOMINAL RATED
INPUT OUTPUT OUTPUT CURRENT EFFICIENCY
VOLTAGE VOLTAGE MIN RATED (%)
MODEL (VDC)(VDC) LOAD(A) OUTPUT (A)1TYP
SLC100 48 0.8 0.0 40 TBD TBD
SLC100 48 1.0 0.0 40 TBD TBD
SLC100 48 1.2 0.0 40 1.80 80
SLC100 48 1.5 0.0 40 2.20 82
SLC100 48 1.8 0.0 40 TBD TBD
SLC100 48 2.5 0.0 40 TBD TBD
SLC100 48 3.3 0.0 30 TBD TBD
PRODUCT SELECTION CHART
SLC100 48 12.0 0.0 8.3 TBD TBD
SLC100 48 5.0 0.0 20 TBD TBD
SLC100 Rev A 3/2004
ISO9001
CERTIFIED
* Note 1: Maximum output current for SMD Models is 25A.
INPUT
CURRENT
RATED LOAD (A)
(48Vin)
Product: www.cdpoweronline.com SLC100 Rev A 3/2004 2
INPUT
Voltage Range
ISOLATION
Input/Output Isolation Voltage
Capacitance
Resistance
FEATURES
Turn On Time
Remote Sense Compensation
Output Voltage Trim Range
Output Over Voltage Protection
Over Temperature Shutdown
Shutdown
Turn On
Input Under Voltage Protection
Turnoff
Turn On
ON/OFF Logic Function
Logic Low Ion/off
Logic Low Von/off
Logic High Ion/off
Logic High Von/off
GENERAL
Switching Frequency
MTTF (per Telcordia TR-NWT-000332)
ABSOLUTE MAXIMUM RATINGS, ALL MODELS
COMMON ELECTRICAL SPECIFICATIONS
PARAMETER CONDITIONS MIN TYP MAX UNITS
VDC
VDC
pF
MΩ
mS
% of VNOM
% of VNOM
% of VNOM
°C
°C
VDC
VDC
mA
VDC
µA
VDC
KHz
Hrs
36 48 75
2000
2000
10
TBD
TBD
5.00
5
-10 +10
TBD
Open
Collector
0.8
TBD
TBD 200
31.50 32.50
32.50 33.70
+120 +140
PARAMETER CONDITIONS MIN TYP MAX UNITS
COMMON ELECTRICAL SPECIFICATIONS, ALL MODELS
Specifications are at TA = +25°C, Airflow = 300LFM (1.5m/s) at nominal input voltage unless otherwise specified.
Input Voltage-Operating
Input Voltage-Operating
Operating Ambient Temperature
Storage Temperature
Output Short Circuit Duration
Lead Temperature (Soldering, 10 sec max)
Continuous
75 VDCContinuous
Transient (100 mS) TBD VDC
-40 100 °C
°C -40 +125
+300 °C
TBD
Input to Output
Input to Output
Output to within 1% of Vnom
3
SLC100 3/2004
Product: www.cdpoweronline.com
.450
[11.43]
.750
[19.05]
1.050
[26.67] 1.050 [26.67]
.900 [22.86]
.750 [19.05]
.600 [15.24]
.450 [11.43]
.000
.000
2.300 [58.42]
1.500
[38.10]
.150 [3.81]
2.150 [54.61]
.400
Ø.080 [2.03], 2 PlacesØ.060 [1.52], 6 Places
BOTTOM VIEW
(PIN SIDE)
4
5
6
7
8
3
2
1
.450
[11.43]
.750
[19.05]
1.050
[26.67] 1.050 [26.67]
.900 [22.86]
.750 [19.05]
.600 [15.24]
.450 [11.43]
.000
.000
2.300 [58.42]
1.500
[38.10]
.150 [3.81]
2.150 [54.61]
.400
Ø.080 [2.03], 2 PlacesØ.060 [1.52], 6 Places
BOTTOM VIEW
(PIN SIDE)
4
5
6
7
8
3
2
1
MECHANICAL (THROUGH HOLE)
NOTES:
Pin placement tolerance: +0.010
Pin material: Copper
Pin Finish: Matte Tin over Nickel
Converter weight: [30.8g]
MECHANICAL (SMT)
8 +Vout
PIN FUNCTIONS
1 +Vin
2 Remote On/Off
3 -Vin
4 -Vout
5 - Sense
6 Trim
7 + Sense
NOTES:
Interconnect placement tolerance:
+.010
Interconnect material: Copper
Interconnect Finish: Matte tin over
nickel with tin/lead coating
on contact surface
Converter weight: [30.3g]
8 +Vout
Interconnect FUNCTIONS
1 +Vin
2 Remote On/Off
3 -Vin
4 -Vout
5 - Sense
6 Trim
7 + Sense
General Tolerance; +.015
Interconnect Locations/Diameters: +.005
Dimensions are in inches [Millimeters]
General Tolerance; +.015
Pin Locations/Diameters: +.005
Dimensions are in inches [Millimeters]
* Interconnect co-planarity within 0.004
_
_
_
_
Product: www.cdpoweronline.com SLC100 Rev A 3/2004 4
ORDERING INFORMATION
MODEL NUMBER Vout (Vdc) PINOUT LOGIC
SLC100 - 1 1.0 Through Hole Positive
SLC100 - 2 1.2 Through Hole Positive
SLC100 - 3 1.5 Through Hole Positive
SLC100 - 4 1.8 Through Hole Positive
SLC100 - 5 2.0 Through Hole Positive
SLC100 - 6 2.5 Through Hole Positive
SLC100 - 7 3.3 Through Hole Positive
SLC100 - 8 5.0 Through Hole Positive
SCL100 - 9 12.0 Through Hole Positive
SLC100 - 10 1.0 SMD Positive
SLC100 - 11 1.2 SMD Positive
SLC100 - 12 1.5 SMD Positive
SLC100 - 13 1.8 SMD Positive
SLC100 - 14 2.0 SMD Positive
SLC100 - 15 2.5 SMD Positive
SLC100 - 16 3.3 SMD Positive
SLC100 - 17 5.0 SMD Positive
SLC100 - 18 12.0 SMD Positive
MODEL NUMBER Vout (Vdc) PINOUT LOGIC
SLC100 - 19 1.0 Through Hole Negative
SLC100 - 20 1.2 Through Hole Negative
SLC100 - 21 1.5 Through Hole Negative
SLC100 - 22 1.8 Through Hole Negative
SLC100 - 23 2.0 Through Hole Negative
SLC100 - 24 2.5 Through Hole Negative
SLC100 - 25 3.3 Through Hole Negative
SLC100 - 26 5.0 Through Hole Negative
SCL100 - 27 12.0 Through Hole Negative
SLC100 - 28 1.0 SMD Negative
SLC100 - 29 1.2 SMD Negative
SLC100 - 30 1.5 SMD Negative
SLC100 - 31 1.8 SMD Negative
SLC100 - 32 2.0 SMD Negative
SLC100 - 33 2.5 SMD Negative
SLC100 - 34 3.3 SMD Negative
SLC100 - 35 5.0 SMD Negative
SLC100 - 36 12.0 SMD Negative
SLC100 - 37 0.8 Through Hole Positive
SLC100 - 38 0.8 SMD Positive
SLC100 - 39 0.8 Though Hole Negative
SLC100 - 40 0.8 SMD Negative
5
SLC100 3/2004
Product: www.cdpoweronline.com
Figure 1 – Remote Sensing Circuit 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.
Figure 2 – Trim Up Circuit
Remote Sense
Operation
SLC100
+ Sense
-
Sense
Trim
+ Vout
- Vout
+ Vin
ON/OFF
- Vin
(Top View)
Load
C
L
C
B
C
B
SLC100
+ Sense
-
Sense
Trim
+ Vout
- Vout
+ Vin
ON/OFF
- Vin
(Top View)
Load
R
T
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 de-couple
any AC on the power lines and assure that only the DC
voltage is sensed.
When using remote sense with dynamic loads, the tran-
sient 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.
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 regu-
lated 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.
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 com-
pensation range of the sense function.
APPLICATION NOTES
If remote sensing is not desired then +Sense and -
Sense must be tied to their respective outputs for
proper operation.
•
•
Product: www.cdpoweronline.com SLC100 Rev A 3/2004 6
Remote ON/OFF Function
Figure 4 – Remote ON/OFF Control Circuit
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 ther-
mistor 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 tem-
perature 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.
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 open-drain
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.
SLC100
+ Sense
-
Sense
Trim
+ Vout
- Vout
+ Vin
ON/OFF
- Vin
(Top View)
Control Signal
APPLICATION NOTES
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.
Remote ON/OFF Control Function
SLC100
+ Sense
-
Sense
Trim
+ Vout
- Vout
+ Vin
ON/OFF
- Vin
(Top View)
Load
R
T
Figure 3 – Trim Down Circuit
To lower the converter output voltage a resistor must be
placed between the Trim pin and -Vout pin as shown in
Figure 3.
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.
7
SLC100 3/2004
Product: www.cdpoweronline.com
Safety
The SLC100 meets safety requirements per UL/CUL 60950
and VDE EN60950, basic insulation rating.
EMC/EMI Considerations
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 ambi-
ent temperature range of 0 to 85oC and at air flows up to
600LFM. In each case, the maximum load current is
defined as the point at which a known component reaches
its individual temperature limit.
Efficiency Performance
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 section.
Start-Up, ON/OFF and Transient Response
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
model are provided in their respective section.
APPLICATION NOTES
Product: www.cdpoweronline.com SLC100 Rev A 3/2004 8
SLC100 1.2VOUT ELECTRICAL SPECIFICATIONS
Specifications are at TA = +25°C, Airflow = 300LFM (1.5m/s) at nominal input voltage unless otherwise specified.
INPUT
OUTPUT
PARAMETER CONDITIONS MIN TYP MAX UNITS
INPUT
Maximum Input Current
Inrush Charge
Reflected Ripple Current
Input Voltage Ripple Rejection
No Load Input Current
Quiescent Input Current
OUTPUT
Voltage Setpoint
Voltage Range
Line Regulation
Load Regulation
Output Ripple
Output Current Range
Output Current Limit Inception
Efficiency
Transient Response
Peak Deviation
Settling Time
External Load Capacitance
Rated Power
44 48 A
100 120 mVpk-pk
0 401 A
80 %
50,000 µF
50% to 75% Load Step at di/dt
=0.1 A/µS; Cext =TBD
TBD mV
TBD µS
1.80 A
TBD mApk-pk
Vin = 75Vdc 0.180 mC
-30 dB
55 mA
2 mA
1.2 1.218 Vdc
TBD TBD Vdc
Full Load; Vin = 36Vdc
Full Load (100Hz-1KHz)
Full Load, XXMhz Bandwidth
No Load
0.05 0.10 % of Vnom
0.25 0.50 % of Vnom
48 W
TBD
1.182
Over all conditions of line,
load and temperature
* Note 1: Maximum output current for SMD Models is 25A.
9
SLC100 3/2004
Product: www.cdpoweronline.com
PERFORMANCE CURVES: SLC100 (1.2VOUT)
TBD
Product: www.cdpoweronline.com SLC100 Rev A 3/2004 10
SLC100 1.5VOUT ELECTRICAL SPECIFICATIONS
Specifications are at TA = +25°C, Airflow = 300LFM (1.5m/s) at nominal input voltage unless otherwise specified.
INPUT
OUTPUT
PARAMETER CONDITIONS MIN TYP MAX UNITS
INPUT
Maximum Input Current
Inrush Charge
Reflected Ripple Current
Input Voltage Ripple Rejection
No Load Input Current
Quiescent Input Current
OUTPUT
Voltage Setpoint
Voltage Range
Line Regulation
Load Regulation
Output Ripple and Noise
Output Current Range
Output Current Limit Inception
Efficiency
Transient Response
Peak Deviation
Settling Time
External Load Capacitance
Rated Power
44 48 A
100 mVpk-pk
0 401 A
82 %
50,000 µF
50% to 75% Load Step at di/dt
= .1A/µs; Cext = TBD
TBD mV
TBD µS
2.20 A
TBD mApk-pk
Vin = 75Vdc 0.180 mC
-30 dB
75 mA
2 mA
1.49 1.5 1.52 Vdc
TBD TBD Vdc
Full Load; Vin = 36Vdc
Full Load (100Hz-1KHz)
Full Load, XXMhz Bandwidth
No Load
0.05 0.10 % of Vnom
0.25 0.50 % of Vnom
48 W
Over all conditions of line,
load and temperature
* Note 1: Maximum output current for SMD Models is 25A.
11
SLC100 3/2004
Product: www.cdpoweronline.com
PERFORMANCE CURVES: SLC100 (1.5VOUT)
TBD
Product: www.cdpoweronline.com SLC100 Rev A 3/2004 12
Power Electronics Division, Americas
3400 E Britannia Drive, Tucson, Arizona 85706
Tel: 800.547.2537 Fax: 520.295.4197
C&D Technologies, EMEA/Asia/Pacific
Milton Keynes MK14 5BU UK
Tel: +44 (0)1908 615232
Fax: +44 (0)1908 617545
Any data, prices, descriptions or specifications presented herein are subject to revision by C&D Technologies, Inc. without notice. While such information is believed to
be accurate as indicated herein, C&D Technologies, Inc. makes no warranty and hereby disclaims all warranties, express or implied, with regard to the accuracy or
completeness of such information. Further, because the product(s) featured herein may be used under conditions beyond its control, C&D Technologies, Inc. hereby
disclaims all warranties, either express or implied, concerning the fitness or suitability of such product(s) for any particular use or in any specific application or arising
from any course of dealing or usage of trade. The user is solely responsible for determining the suitability of the product(s) featured herein for user’s intended purpose
and in user’s specific application. C&D Technologies, Inc. does not warrant or recommend that any of its products be used in any life support or aviation or aerospace
applications.
C&D TECHNOLOGIES
