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SLC100
1.2V
Industry Standard Footprint & Size 2.28" x 1.45" High Efficiency Series Output Voltage: 1.0V, 1.2V, 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 SMD Models with Position PerfectTM Interconnects Isolation Voltage of 2000 VDC UL/CUL 60950 recognized (US & Canada), VDE EN60950, 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
ISO9001
CERTIFIED
40 Amp Single Output Quarter Brick DC/DC Converter
Wide Input Voltage Range: 36 - 75VDC Fixed Frequency Operation
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 ultra-high efficiencies and excellent thermal performance. It includes extensive control and protection features for maximum flexibility and satisfies the power requirements for a whole range of
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 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
NOMINAL INPUT VOLTAGE (VDC) 48 RATED OUTPUT VOLTAGE (VDC) 1.2 OUTPUT CURRENT MIN RATED LOAD(A) OUTPUT (A)1 0.0 40 INPUT CURRENT AT RATED LOAD (A) (48Vin) 1.30 EFFICIENCY TYPICAL (%) 80
MODEL SLC100-2,11,20,29
* Note 1: Maximum output current for SMD Models is 25A.
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SLC100 1.2V Rev C 11/2004
1
ABSOLUTE MAXIMUM RATINGS, ALL MODELS
PARAMETER
Input Voltage-Operating Input Voltage-Operating Operating Ambient Temperature Storage Temperature Output Short Circuit Duration Lead Temperature (Soldering, 10 sec max)
CONDITIONS
Continuous Transient (100 mS)
MIN
TYP
MAX
75 100
UNITS
VDC VDC C C C
-40 -40 Continuous
85 +125 +300
COMMON ELECTRICAL SPECIFICATIONS, ALL MODELS
Specifications are at TA = +25C, Airflow = 300LFM (1.5m/s) at nominal input voltage unless otherwise specified.
PARAMETER
INPUT Voltage Range ISOLATION Input/Output Isolation Voltage Capacitance Resistance Input to Output Input to Output 10 2000 2000 VDC pF M 36 48 75 VDC
CONDITIONS
MIN
TYP
MAX
UNITS
COMMON ELECTRICAL SPECIFICATIONS
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 Turn Off Turn On Lockout Hysteresis Voltage 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-332) 1,497,000 200 KHz Hrs 360 0.4 1.0 Open Collector A VDC A 30.70 33.30 1.30 32.00 34.50 2.50 VDC VDC VDC Internal Monitor Point Internal Monitor Point 135 125 C C -10 +120 Output to within 1% of Vnom 5.00 5 +10 +140 mS % of VNOM % of VNOM % of VNOM
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SLC100 1.2V Rev C 11/2004
2
MECHANICAL (THROUGH HOLE)
.400 [10.16] 2x, O080 [2.03] .197 [5.00] 6x, O.060 [1.52] .052 [1.32] 6x, O.040 [1.02] .037 [0.94] 2x, O.060 [1.52]
PIN FUNCTIONS
1 2 3 4 5 6 7 8 +Vin Remote On/Off -Vin -Vout - Sense Trim + Sense +Vout
1.450 [36.83]
1.025 [26.04] .725 [18.42] .425 [10.80]
3
4 5
1.025 [26.04] .875 [22.23] .725 [18.42] .575 [14.61] .425 [10.80]
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]
2
6 7
1
8
UL/TUV Standards require a clearance greater than 0.04" 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.
.000 [0.00]
.140 [3.56] 2.140 [54.36] .000 [0.00]
BOTTOM VIEW (PIN SIDE)
MECHANICAL (SMT)
.400 [10.16]
2.280 [57.91]
Interconnect FUNCTIONS
1 2 3 4 5 6 7 8 +Vin Remote On/Off -Vin -Vout - Sense Trim + Sense +Vout
6x, O.060 [1.52]
.052 [1.32]
.037 [0.94]
2x, O.080 [2.03]
1.450 [36.83]
1.025 [26.04] .725 [18.42] .425 [10.80]
3
4 5
1.025 [26.04] .875 [22.23] .725 [18.42] .575 [14.61] .425 [10.80]
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]
2
6 7
1
8
UL/TUV Standards require a clearance greater than 0.04" 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.
.000 [0.00]
* Interconnect co-planarity within 0.004"
.140 [3.56] 2.140 [54.36] .000 [0.00]
BOTTOM VIEW (PIN SIDE)
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2.280 [57.91]
SLC100 1.2V Rev C 11/2004
3
ORDERING INFORMATION
MODEL NUMBER SLC100 - 1 SLC100 - 2 SLC100 - 3 SLC100 - 4 SLC100 - 5 SLC100 - 6 SLC100 - 7 SLC100 - 8 SLC100 - 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 SLC100 - 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
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SLC100 1.2V Rev C 11/2004
4
APPLICATION NOTES
Operation
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 the sense function. 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. 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. If remote sensing is not desired then +Sense and -Sense must be tied to their respective outputs for proper operation.
* *
Output Voltage Trim
Figure 1 - Remote Sensing Circuit 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.
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.
Figure 2 - Trim Up Circuit
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SLC100 1.2V Rev C 11/2004
5
Remote ON/OFF Function
APPLICATION NOTES
To lower the converter output voltage a resistor must be placed between the Trim pin and -Vout pin as shown in Figure 3.
Figure 4 - Remote ON/OFF Control Circuit
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.
Rtrim_UP = 5.11V out (100+%) - 511 - 10.22 k Vref % % Vref=1.225 Rtrim_down = 5.11 -10.22 k %
Protective Functions
Temperature Shutdown
The over temperature shutdown feature of the SLC100 will cause the unit to shutdown at a typical pwb internal monitor point temperature of 135oC. This protective feature is comprised of a thermistor in the units control loop. At a temperature of 135oC 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 125oC 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 32.0 Vdc nominal will shut down the device. At an input voltage less than 32.0V 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 33.3V the unit will return to normal operation. The unit will typically turn on at an input voltage of between 33.3V and 34.5V 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.
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 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.
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SLC100 1.2V Rev C 11/2004
6
APPLICATION NOTES
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.
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 700LFM. Temperature limits for thermal derating curves were 130oC for semiconductor junction temperature and 130oC for board temperature.
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.
Output Over-Voltage Protection
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. SLC100 units with a non-latching OVP feature are available on request. Please contact the factory for further details.
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.
Safety
The SLC100 meets safety requirements per UL/CUL 60950 and VDE EN60950, basic insulation rating.
EMC/EMI Considerations
Analysis pending.
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SLC100 1.2V Rev C 11/2004
7
SLC100 1.2VOUT ELECTRICAL SPECIFICATIONS
Specifications are at TA = +25C, Airflow = 300LFM (1.5m/s) at nominal input voltage unless otherwise specified.
PARAMETER
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, 20Mhz Bandwidth Full Load (100Hz-1KHz) No Load -30 55 3.0 Fast blow external fuse 7 1.70 0.180 0.100 A mC Apk-pk dB mA mA A
CONDITIONS
MIN
TYP
MAX
UNITS
ELECTRICAL SPECIFICATIONS
Disabled Input Current Recommended Input Fuse 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 * Note 1: Maximum output current for SMD Models is 25A. 50% to 75% Load Step at di/dt =0.1 A/S;Cext=None 0 42 80 Over all conditions of line, load and temperature 1.182 1.164 0.05 0.25 100 1.2
1.218 1.236 0.10 0.50 120 401 46
Vdc Vdc % of Vnom % of Vnom mVpk-pk A A %
120 300 50,000 48
mV S F W
TRIM RESISTANCE VALUES FOR 1.2V MODULE
Trim (%) 1 2 3 4 5 6 7 8 9 10 Trim Up Vout (Vdc) 1.212 1.224 1.236 1.248 1.260 1.272 1.284 1.296 1.308 1.320 Rtrim (Kohm) 325.6 166.49 112.1 84.92 68.26 57.44 49.64 43.68 39.09 35.37 Trim (%) 1 2 3 4 5 6 7 8 9 10 Trim Down Vout (Vdc) 1.188 1.176 1.164 1.152 1.140 1.128 1.116 1.104 1.092 1.080 Rtrim (Kohm) 353.5 172.07 112.78 83.56 65.83 54.01 45.66 39.36 34.47 30.61
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SLC100 1.2V Rev C 11/2004
8
PERFORMANCE CURVES: SLC100 (1.2 VOUT)
Efficiency vs. Output Current
@ TA = +250C; Vin = 48Vdc
Efficiency vs. Input Voltage
@ TA = +250C; IO = 40A
Turn On Time (VIN to VOUT)
Turn Off Time (VIN to VOUT)
VOUT VIN
VOUT VIN
Time Scale = 1ms/div
Time Scale = 50us/div
Primary On Time (Primary Remote to VOUT)
Primary Off Time (Primary Remote to VOUT)
VOUT
VOUT ON/OFF
ON/OFF
VOUT
Time Scale = 1ms/div
Time Scale = 50us/div
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SLC100 1.2V Rev C 11/2004
9
PERFORMANCE CURVES: SLC100 (1.2 VOUT) continued
Transient Response, 50% to 75% Load Step Transient Response, 75% to 50% Load Step
VOUT
VOUT
IOUT
IOUT
Voltage Scale = 100mV/div; Time Scale = 100us/div di/dt = 0.2A/us
Voltage Scale = 100mV/div; Time Scale = 100us/div di/dt = 0.2A/us
Output Current (A) Vs. Ambient Temperature (Deg C) @ Vin = 48 Vdc. 40 36
Output Current (A)
32 28 24 20 16 12 8 4 0 -35 -25 -15 -5 5 15 25 35 45 55 65 75 85 Ambient Temperature (Deg C)
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NC 100 LFM 200 LFM 300 LFM 400 LFM 500 LFM 600 LFM 700 LFM
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.
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SLC100 1.2V Rev C 11/2004
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