FEATURES High efficiency: 92.0% @ 12V/7.5A Size: 33.0x22.8x9.5mm (1.30”x0.90”x0.37”) Industry standard footprint and pinout Fixed frequency operation SMD or through-hole versions Input UVLO OTP and output OCP, OVP Output voltage trim: -20%, +10% Monotonic startup into normal and pre-biased loads 1500V isolation and basic insulation No minimum load required No negative current during power or enable on/off ISO 9001, TL 9000, ISO 14001, QS 9000, OHSAS18001 certified manufacturing facility UL/cUL 60950-1 (US & Canada) Recognized Delphi Series V48SC, 1/16th Brick 90W DC/DC Power Modules: 48V in, 12V, 7.5A out The Delphi Series V48SC, 1/16 th Brick, 48V input, single output, isolated DC/DC converters, are the latest offering from a world leader in power systems technology and manufacturing ― Delta Electronics, Inc. This product family provides up to 90 watts of power or 30A of th output current in the 1/16 brick form factor (1.3”x0.90”) and pinout. OPTIONS SMD pins Short pin lengths available Positive remote On/Off Heat spreader With creative design technology and optimization of component placement, these converters possess outstanding electrical and thermal performance, as well as extremely high reliability under highly stressful operating conditions. Typical efficiency of the 12V/7.5A module is greater than 92.0%. All modules are protected from abnormal input/output voltage, current, and temperature conditions. For lower power needs, but in a similar small form factor, please check APPLICATIONS out Delta V36SE (50W), S48SP (36W or 10A) and S36SE (17W or 5A) Optical Transport series standard DC/DC modules. Data Networking Communications Servers DS_V48SC12007_08212013 TECHNICAL SPECIFICATIONS (TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.) PARAMETER NOTES and CONDITIONS V48SC12007 (Standard) Min. ABSOLUTE MAXIMUM RATINGS Input Voltage Continuous Transient (100ms) Operating Ambient Temperature Storage Temperature Input/Output Isolation Voltage INPUT CHARACTERISTICS Operating Input Voltage Input Under-Voltage Lockout Turn-On Voltage Threshold Turn-Off Voltage Threshold Lockout Hysteresis Voltage Maximum Input Current No-Load Input Current Off Converter Input Current 2 Inrush Current (I t) Input Reflected-Ripple Current Input Voltage Ripple Rejection OUTPUT CHARACTERISTICS Output Voltage Set Point Output Voltage Regulation Over Load Over Line Over Temperature Total Output Voltage Range Output Voltage Ripple and Noise Peak-to-Peak RMS Operating Output Current Range Output Over Current Protection DYNAMIC CHARACTERISTICS Output Voltage Current Transient Positive Step Change in Output Current Negative Step Change in Output Current Settling Time (within 1% Vout nominal) Turn-On Transient Start-Up Delay Time, From On/Off Control or Input Start-Up Rise Time, From On/Off Control or Input Maximum Output Capacitance EFFICIENCY 100% Load 60% Load ISOLATION CHARACTERISTICS Input to Output Isolation Resistance Isolation Capacitance FEATURE CHARACTERISTICS Switching Frequency ON/OFF Control, Negative Remote On/Off logic Logic Low (Module On) Logic High (Module Off) ON/OFF Control, Positive Remote On/Off logic Logic Low (Module Off) Logic High (Module On) ON/OFF Current (for both remote on/off logic) ON/OFF Current (for both remote on/off logic) Leakage Current (for both remote on/off logic) Output Voltage Trim Range Output Voltage Remote Sense Range Output Over-Voltage Protection GENERAL SPECIFICATIONS 100ms -40 -55 Max. Units 80 100 85 125 1500 Vdc Vdc °C °C Vdc 36 48 75 Vdc 32.5 29.5 1.5 34.5 31.5 3 35.5 33.5 4 4 12 Vdc Vdc Vdc A mA mA With 100uF external input capacitor 1 As P-P thru 12µH inductor, 5Hz to 20MHz 120 Hz 20 mA dB 12.18 Vdc 12.36 mV mV mV V 100% Load, 36Vin 60 8 Vin=48V, Io=Io.max, Tc=25°C Io=Io, min to Io, max Vin=36V to 75V Tc=-40°C to125°C Over sample load, line and temperature 5Hz to 20MHz bandwidth max load on output, 20MHz bandwidth 10uF tantalum + 1uF ceramic capacitor max load on output, 20MHz bandwidth 10uF tantalum + 1uF ceramic capacitor Output Voltage 10% Low -60 11.82 11.64 100 mV 7.5 140 300 300 200 Vin=48V Vin=48V 92.0 92.0 1500 Von/off Von/off Ion/off at Von/off=0.0V Ion/off at Von/off=2.4V Logic High, Von/off=5V Max rated current guaranteed at full trim range Max rated current guaranteed at full remote sense range Over full temp range; % of nominal Vout Per Telecordia SR-332, 80% load, 25°C, 48Vin, 300LFM Weight Open frame Refer to Figure 22 for Hot spot location Over-Temperature Shutdown (Hot Spot) (48Vin,80%Io, 200LFM,Airflow from Vout+ to Vin+) Over-Temperature Shutdown (NTC Resistor) Refer to Figure 22 for NTC resistor location Note: Please attach thermocouple on NTC resistor to test OTP function, the hot spot’s temperature is just for reference. ms ms µF % % 1000 Vdc MΩ pF 420 kHz 10 Von/off Von/off A % mV mV us 15 40 3300 0 2 mV 30 0 110 load capacitor10uF tantalum + 1u ceramic 0.1A/uS Frequency= 250Hz 50% Io.max to 75% Io.max 75% Io.max to 50% Io.max From On/Off Control or Input to 10%Vo From 10%Vo to 90% Vo Full load; 5% overshoot of Vout at startup; 12 ±5 ±5 ±180 0 2.4 0.7 5 V V 0 2.4 0.7 5 1 -20 10 V V mA uA uA % 10 % 110 140 % MTBF DS_V48SC12007_08212013 Typ. 4.9 M hours 15 grams 127 132 137 °C 120 125 130 °C 2 ELECTRICAL CHARACTERISTICS CURVES Figure 1: Efficiency vs. load current for minimum, nominal, and maximum input voltage at 25°C Figure 2: Power dissipation vs. load current for minimum, nominal, and maximum input voltage at 25°C. Figure 3: Typical full load input characteristics at room temperature DS_V48SC12007_08212013 3 ELECTRICAL CHARACTERISTICS CURVES For Negative Remote On/Off Start up Figure 4: Turn-on transient at full rated load current (10 ms/div). Vin=48V. Top Trace: Vout, 5.0V/div; Bottom Trace: ON/OFF input, 5V/div Figure 5: Turn-on transient at zero load current (10 ms/div). Vin=48V. Top Trace: Vout: 5.0V/div, Bottom Trace: ON/OFF input, 5V/div For Input Voltage Start up Figure 6: Turn-on transient at full rated load current (10 ms/div). Vin=48V. Top Trace: Vout, 5.0V/div; Bottom Trace: Vin, 50V/div Figure 7: Turn-on transient at zero load current (10 ms/div). Vin=48V. Top Trace: Vout, 5.0V/div; Bottom Trace: Vin, 50V/div Figure 8: Output voltage response to step-change in load current (75%-50%-75% of Io, max; di/dt = 0.1A/µs). Load cap: 10µF tantalum capacitor and 1µF ceramic capacitor. Top Trace: Vout (0.15V/div, 200us/div), Bottom Trace: Iout (5A/div). Scope measurement should be made using a BNC cable (length shorter than 20 inches). Position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module DS_V48SC12007_08212013 4 ELECTRICAL CHARACTERISTICS CURVES is ic Vin+ + + Vin- Cs: 220uF 100uF, ESR=0.2 ohm @ 25oC 100KHz Figure 9: Test set-up diagram showing measurement points for Input Terminal Ripple Current and Input Reflected Ripple Current. Note: Measured input reflected-ripple current with a simulated source Inductance (LTEST) of 12 μH. Capacitor Cs offset possible battery impedance. Measure current as shown above Figure 10: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 12µH source impedance and 33µF electrolytic capacitor (200 mA/div, 1us/div) Copper Strip Vo(+) 10u 1u SCOPE RESISTIVE LOAD Vo(-) Figure 11: Input reflected ripple current, is, through a 12µH source inductor at nominal input voltage and rated load current (20 mA/div, 2us/div) Figure 12: Output voltage noise and ripple measurement test setup Figure 13: Output voltage ripple at nominal input voltage and rated load current (Io=7.5A)(50 mV/div, 1us/div) Load capacitance: 1µF ceramic capacitor and 10µF tantalum capacitor. Bandwidth: 20 MHz. Scope measurements should be made using a BNC cable (length shorter than 20 inches). Position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module. DS_V48SC12007_08212013 5 DESIGN CONSIDERATIONS Input Source Impedance The impedance of the input source connecting to the DC/DC power modules will interact with the modules and affect the stability. A low ac-impedance input source is recommended. If the source inductance is more than a few μH, we advise adding a 100 μF electrolytic capacitor (ESR < 0.7 Ω at 100 kHz) mounted close to the input of the module to improve the stability. Layout and EMC Considerations Delta’s DC/DC power modules are designed to operate in a wide variety of systems and applications. For design assistance with EMC compliance and related PWB layout issues, please contact Delta’s technical support team. An external input filter module is available for easier EMC compliance design. Below is the reference design for an input filter tested with V48SC120XXX to meet EN55022 (VDE0878) class A(both q. peak and average) Figure 15 - EMI test negative line Schematic and Components List Figure 16 - EMI test positive line Safety Considerations Figure 14 - EMI test schematic C1= 3.3uF/100 V C2= 47uF/100 V The power module must be installed in compliance with the spacing and separation requirements of the end-user’s safety agency standard, i.e., UL60950-1, CSA C22.2 NO. 60950-1 2nd and IEC 60950-1 2nd : 2005 and EN 60950-1 2nd: 2006+A11+A1: 2010, if the system in which the power module is to be used must meet safety agency requirements. C3= 47uF/100 V C4=C5=1nF/250Volt T1=1mH, type P53910(Pulse) Test Result: At T = +25C , Vin = 48 V and full load Yellow line is quasi peak mode; Blue line is average mode. DS_V48SC12007_08212013 Basic insulation based on 75 Vdc input is provided between the input and output of the module for the purpose of applying insulation requirements when the input to this DC-to-DC converter is identified as TNV-2 or SELV. An additional evaluation is needed if the source is other than TNV-2 or SELV. When the input source is SELV circuit, the power module meets SELV (safety extra-low voltage) requirements. If the input source is a hazardous voltage which is greater than 60 Vdc and less than or equal to 75 Vdc, for the module’s output to meet SELV requirements, all of the following must be met: 6 The input source must be insulated from the ac mains by reinforced or double insulation. The input terminals of the module are not operator accessible. A SELV reliability test is conducted on the system where the module is used, in combination with the module, to ensure that under a single fault, hazardous voltage does not appear at the module’s output. When installed into a Class II equipment (without grounding), spacing consideration should be given to the end-use installation, as the spacing between the module and mounting surface have not been evaluated. The power module has extra-low voltage (ELV) outputs when all inputs are ELV. This power module is not internally fused. To achieve optimum safety and system protection, an input line fuse is highly recommended. The safety agencies require a Fast-acting fuse with 20A maximum rating to be installed in the ungrounded lead. A lower rated fuse can be used based on the maximum inrush transient energy and maximum input current. Soldering and Cleaning Considerations Post solder cleaning is usually the final board assembly process before the board or system undergoes electrical testing. Inadequate cleaning and/or drying may lower the reliability of a power module and severely affect the finished circuit board assembly test. Adequate cleaning and/or drying is especially important for un-encapsulated and/or open frame type power modules. For assistance on appropriate soldering and cleaning procedures, please contact Delta’s technical support team. For hiccup mode, the module will try to restart after shutdown. If the over voltage condition still exists, the module will shut down again. This restart trial will continue until the over-voltage condition is corrected. For latch mode, the module will latch off once it shutdown. The latch is reset by either cycling the input power or by toggling the on/off signal for one second. Over-Temperature Protection The over-temperature protection consists of circuitry that provides protection from thermal damage. If the temperature exceeds the over-temperature threshold the module will shut down, and enter in auto-restart mode or latch mode, which is optional, the default is auto-restart mode. For auto-restart mode, the module will monitor the module temperature after shutdown. Once the temperature is dropped and within the specification, the module will be auto-restart. Remote On/Off The remote on/off feature on the module can be either negative or positive logic. Negative logic turns the module on during a logic low and off during a logic high. Positive logic turns the modules on during a logic high and off during a logic low. Remote on/off can be controlled by an external switch between the on/off terminal and the Vi(-) terminal. The switch can be an open collector or open drain. For negative logic if the remote on/off feature is not used, please short the on/off pin to Vi(-). For positive logic if the remote on/off feature is not used, please leave the on/off pin floating. Vi(+) Sense(+) ON/OFF Over-Current Protection The modules include an internal output over-current protection circuit, which will endure current limiting for an unlimited duration during output overload. If the output current exceeds the OCP set point, the modules will automatically shut down, and enter hiccup mode or latch mode, which is optional, the default is hiccup mode. For hiccup mode, the module will try to restart after shutdown. If the over current condition still exists, the module will shut down again. This restart trial will continue until the over-current condition is corrected. Over-Voltage Protection The modules include an internal output over-voltage protection circuit, which monitors the voltage on the output terminals. If this voltage exceeds the over-voltage set point, the module will shut down, and enter in hiccup mode or latch mode, which is optional, the default is hiccup mode. DS_V48SC12007_08212013 Vo(+) Sense(-) Vi(-) Vo(-) Figure 17: Remote on/off implementation Remote Sense Remote sense compensates for voltage drops on the output by sensing the actual output voltage at the point of load. The voltage between the remote sense pins and the output terminals must not exceed the output voltage sense range given here: [Vo(+) – Vo(–)] – [SENSE(+) – SENSE(–)] ≤ 10% × Vout This limit includes any increase in voltage due to remote sense compensation and output voltage set point adjustment (trim). 7 FEATURES DESCRIPTIONS (CON.) Vi(+) Vo(+) Sense(+) 511 Rtrim down 10.22 K Sense(-) Vi(-) Vo(-) Contact Resistance If the external resistor is connected between the TRIM and SENSE (-) pins, the output voltage set point decreases (Fig. 19). The external resistor value required to obtain a percentage of output voltage change △% is defined as: Contact and Distribution Losses Figure 18: Effective circuit configuration for remote sense operation Ex. When Trim-down -10% (12V×0.9=10.8V) 511 Rtrim down 10.22 K 40.88K 10 If the remote sense feature is not used to regulate the output at the point of load, please connect SENSE(+) to Vo(+) and SENSE(–) to Vo(–) at the module. The output voltage can be increased by both the remote sense and the trim; however, the maximum increase is the larger of either the remote sense or the trim, not the sum of both. When using remote sense and trim, the output voltage of the module is usually increased, which increases the power output of the module with the same output current. Max rated current is guaranteed at full output voltage remote sense range. Output Voltage Adjustment (TRIM) To increase or decrease the output voltage set point, connect an external resistor between the TRIM pin and either the SENSE(+) or SENSE(-). The TRIM pin should be left open if this feature is not used. Figure 20: Circuit configuration for trim-up (increase output voltage) If the external resistor is connected between the TRIM and SENSE (+) the output voltage set point increases (Fig. 20). The external resistor value required to obtain a percentage output voltage change △% is defined as: Rtrim up 5.11Vo (100 ) 511 10.22K 1.225 Ex. When Trim-up +10% (12V×1.1=13.2V) Rtrim up 5.11 12 (100 10) 511 10.22 489.31K 1.225 10 10 Trim resistor can also be connected to Vo+ or Vo- but it would introduce a small error voltage than the desired value. Figure 19: Circuit configuration for trim-down (decrease output voltage) The output voltage can be increased by both the remote sense and the trim, however the maximum increase is the larger of either the remote sense or the trim, not the sum of both. When using remote sense and trim, the output voltage of the module is usually increased, which increases the power output of the module with the same output current. DS_V48SC12007_08212013 Max rated current is guaranteed at full output voltage trim range. 8 THERMAL CONSIDERATIONS Thermal Derating Thermal management is an important part of the system design. To ensure proper, reliable operation, sufficient cooling of the power module is needed over the entire temperature range of the module. Convection cooling is usually the dominant mode of heat transfer. Heat can be removed by increasing airflow over the module. To enhance system reliability, the power module should always be operated below the maximum operating temperature. If the temperature exceeds the maximum module temperature, reliability of the unit may be affected. Hence, the choice of equipment to characterize the thermal performance of the power module is a wind tunnel. THERMAL CURVES HOT SPOT Thermal Testing Setup Delta’s DC/DC power modules are characterized in heated vertical wind tunnels that simulate the thermal environments encountered in most electronics equipment. This type of equipment commonly uses vertically mounted circuit cards in cabinet racks in which the power modules are mounted. The following figure shows the wind tunnel characterization setup. The power module is mounted on a test PWB and is vertically positioned within the wind tunnel. The space between the neighboring PWB and the top of the power module is constantly kept at 6.35mm (0.25’’). AIRFLOW NTC RESISTOR Figure 22: * Hot spot& NTC resistor temperature measurement location Output Current (A) 8 PWB FACING PWB V48SC12007(Standard) Output Current vs. Ambient Temperature and Air Velocity @Vin = 48V (Either Orientation) 7 Natural Convection 6 MODULE 100LFM 5 200LFM 4 300LFM 3 AIR VELOCITY AND AMBIENT TEMPERATURE MEASURED BELOW THE MODULE 400LFM 2 50.8 (2.0”) AIR FLOW 500LFM 1 600LFM 0 25 12.7 (0.5”) 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (℃) Figure 23: Output Current vs. Ambient Temperature and Air Velocity @ Vin=48V (Either Orientation) Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches) Figure 21: Wind tunnel test setup DS_V48SC12007_08212013 9 PICK AND PLACE LOCATION RECOMMENDED PAD LAYOUT (SMD) SURFACE-MOUNT TAPE & REEL DS_V48SC12007_08212013 10 LEADED (Sn/Pb) PROCESS RECOMMEND TEMP. PROFILE Note: The temperature refers to the pin of V48SC, measured on the pin +Vout joint. LEAD FREE (SAC) PROCESS RECOMMEND TEMP. PROFILE Temp. Peak Temp. 240 ~ 245 ℃ 217℃ Ramp down max. 4℃/sec. 200℃ 150℃ Preheat time 100~140 sec. Time Limited 90 sec. above 217℃ Ramp up max. 3℃/sec. 25℃ Time Note: The temperature refers to the pin of V48SC, measured on the pin +Vout joint. DS_V48SC12007_08212013 11 MECHANICAL DRAWING Surface-mount module Pin No. 1 2 3 4 5 6 7 8 Name +Vin ON/OFF -Vin -Vout -SENSE TRIM +SENSE +Vout Through-hole module Function Positive input voltage Remote ON/OFF Negative input voltage Negative output voltage Negative remote sense Output voltage trim Positive remote sense Positive output voltage Pin Specification:(Through-hole) Pins 1~3,5~7 Pins 4 & 8 1.00mm (0.040”) diameter 2. 1.50mm (0.059”) diameter All pins are copper alloy with Matte tin over Ni plated. DS_V48SC12007_08212013 12 PART NUMBERING SYSTEM V 48 Type of Product V - 1/16 Brick S Input Number of Voltage Outputs 4836V~75V S - Single C 120 07 N R F Product Series Output Voltage Output Current ON/OFF Logic Pin Length/Type C-Serial number 120 – 12V 07 – 7.5A N- Negative P- Positive R - 0.170” N - 0.145” K - 0.110” M – SMD A Option Code A - Standard Functions F- RoHS 6/6 B-no sense and trim pin (Lead Free) Space- RoHS5/6 MODEL LIST MODEL NAME V48SC12007NMFA V48SC12007NMFB V48SC12007NRFA INPUT 36~75V 36~75V 36~75V OUTPUT 4A 4A 4A 12V 12.1V 12V EFF @ 100% LOAD 7.5A 7.5A 7.5A 92% 92% 92% Default remote on/off logic is negative and pin length is 0.170” For different remote on/off logic and pin length, please refer to part numbering system above or contact your local sales office. CONTACT: www.deltaww.com/dcdc USA: Telephone: East Coast: 978-656-3993 West Coast: 510-668-5100 Fax: (978) 656 3964 Email: [email protected] Europe: Phone: +31-20-655-0967 Fax: +31-20-655-0999 Email: [email protected] Asia & the rest of world: Telephone: +886 3 4526107 Ext 6220~6224 Fax: +886 3 4513485 Email: [email protected] WARRANTY Delta offers a two (2) year limited warranty. Complete warranty information is listed on our web site or is available upon request from Delta. Information furnished by Delta is believed to be accurate and reliable. However, no responsibility is assumed by Delta for its use, nor for any infringements of patents or other rights of third parties, which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Delta. Delta reserves the right to revise these specifications at any time, without notice. DS_V48SC12007_08212013 13