` FEATURES High efficiency: 94.5% @12V/20A Size: 58.4mm x 22.8mm x 10.9mm (2.30”x0.90”x0.43”) W/O Heat spreader 58.4mm x 22.8mm x 12.7mm (2.30”x0.90”x0.5”) With Heat spreader Industry standard pin out Fixed frequency operation Input UVLO, Output OCP & OVP, OTP Monotonic startup into normal and Pre-biased loads 2250V Isolation and basic insulation No minimum load required No negative current during power on or power off; ISO 9001, TL 9000, ISO 14001, QS 9000, OHSAS 18001 certified manufacturing facility UL/cUL 60950-1 (US & Canada) Recognized, Delphi Series E48SP Eighth Brick Family DC/DC Power Modules: 48V in, 12V/20A out The Delphi Series E48SP, 36~60V input, Eighth Brick, single output, isolated DC/DC converters are the latest offering from a world leader in power systems technology and manufacturing ― Delta Electronics, Inc. The E48SP product provides up to 240 watts of power in an industry standard footprint and pinout. The E48SP converter operates from an input voltage of 36V to 60V. Efficiency is 94.5% for the 12V output at full load. 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. All models are fully protected from abnormal input/output voltage, current, and temperature conditions. The Delphi Series converters meet all safety requirements with basic insulation. DATASHEET DS_E48SP12020NRFB_05232011 OPTIONS Positive On/Off logic Short pin lengths available APPLICATIONS Telecom/DataCom Wireless Networks Optical Network Equipment Server and Data Storage Industrial/Test Equipment TECHNICAL SPECIFICATIONS (TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.) PARAMETER NOTES and CONDITIONS E48SP12020NRFB Min. ABSOLUTE MAXIMUM RATINGS Input Voltage Continuous Operating Case Temperature (Without heat spreader) Operating Case Temperature (With heat spreader) 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) Start up Current Input Terminal Ripple Current 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 DC Current-Limit Inception DYNAMIC CHARACTERISTICS Output Voltage Current Transient Positive Step Change in Output Current Negative Step Change in Output Current Setting Time (within 1% Vout nominal) Turn-On Transient Start-Up Time, From On/Off Control Start-Up Time, From 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 Over-Voltage Protection GENERAL SPECIFICATIONS MTBF Weight Weight Over-Temperature Shutdown ( Without heat spreader) Over-Temperature Shutdown (With heat spreader) DS_E48SP12020NRFB_05232011 Refer to figure 18 for measuring point Refer to figure 20 for measuring point Max. Units -40 -40 -55 65 122 110 125 2250 Vdc °C °C °C Vdc 36 60 Vdc 35.5 33.5 3 7.8 150 12 1 12 0.24 Vdc Vdc Vdc A mA mA 2 As A A mA dB 12.02 Vdc +20 +15 mV mV 12.2 mV V 100 40 200 80 20 150 mV mV A % 200 200 400 400 200 mV mV µs 30 30 40 40 5000 ms ms µF 32.5 30.5 1 Vin=36V, 100% Load, With 100uF external input capacitor Peak, Vin=36V, 100% Load, With 5000uF Co RMS, Vin=48V, With 100uF input cap. P-P thru 12µH inductor, 5Hz to 20MHz 120 Hz Vin=48V, Io=Io.max, Tc=25°C Typ. 34 32 2 7 70 8 7 0.16 6 60 11.67 11.85 Io=Io,min to Io,max Vin=36V to 60V Tc=-40°C to 125°C over sample load, and temperature 5Hz to 20MHz bandwidth Full Load, 1µF ceramic, 10µF tantalum Full Load, 1µF ceramic, 10µF tantalum Full input voltage range Output Voltage 10% Low 11.5 ±120 11.85 0 110 48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs 50% Io.max to 75% Io.max 75% Io.max to 50% Io.max Full load; no overshoot of Vout at startup Vin=48V Vin=48V 93.5 94 94.5 95 % % 2250 1500 Vdc MΩ pF 245 kHz 10 Von/off Von/off Von/off Von/off Ion/off at Von/off=0.0V Ion/off at Von/off=2.4V Logic High, Von/off=15V Over full temp range; % of nominal Vout Io=100% of Io, max; 300LFM; Ta=25°C Open frame With heat spreader Refer to figure 18 for measuring point Refer to figure 20 for measuring point -0.7 2.4 0.8 50 V V -0.7 2.4 0.8 50 1 V V mA µA µA V 10 50 18 14.6 1.19 29.1 39.2 132 120 M hours grams grams °C °C 2 ELECTRICAL CHARACTERISTICS CURVES 96 16 95 14 94 12 Power Loss(W) Efficiency(%) 93 92 91 36V 90 48V 89 10 60V 88 8 36V 6 48V 4 60V 2 87 86 0 2 4 6 8 10 12 14 16 18 20 0 2 4 6 8 Output Current(A) 10 12 14 16 18 20 Output Current(A) Figure 1: Efficiency vs. load current for minimum, nominal, and maximum Figure 2: Power dissipation vs. load current for minimum, nominal, input voltage at 25°C and maximum input voltage at 25°C 15 8 7 12 Output Voltage(V) Input current(A) 6 5 4 9 6 3 3 2 1 0 0 0 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 5 10 15 20 25 30 Output Current(A) Input voltage(V) Figure 3: Typical full load input characteristics at room temperature DS_E48SP12020NRFB_05232011 Figure 4: Output voltage regulation vs load current showing typical current limit curves and converter shutdown points for minimum, nominal, and maximum input voltage at room temperature 3 ELECTRICAL CHARACTERISTICS CURVES For Negative Remote On/Off Logic Figure 5: Turn-on transient at zero load current (10ms/div). Vin=48V. Top Trace: Vout, 5V/div; Bottom Trace: ON/OFF input, 5V/div Figure 6: Turn-on transient at full rated load current (constant current load) (10 ms/div). Vin=48V. Top Trace: Vout, 5V/div; Bottom Trace: ON/OFF input, 5V/div For Input Voltage Start up Figure 7: Turn-on transient at zero load current (10 ms/div). Vin=48V. Top Trace: Vout, 5V/div, Bottom Trace: input voltage, 30V/div DS_E48SP12020NRFB_05232011 Figure 8: Turn-on transient at full rated load current (constant current load) (10 ms/div). Vin=48V. Top Trace: Vout, 5V/div; Bottom Trace: input voltage, 30V/div 4 ELECTRICAL CHARACTERISTICS CURVES Figure 9: Output voltage response to step-change in load current (75%-50% of Io, max; di/dt = 0.1A/µs, Vin=48V). Load cap: 10µF, tantalum capacitor and 1µF ceramic capacitor. Top Trace: Vout (80mV/div, 200us/div); Bottom Trace: Io (10A/div, 200us/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.. is Figure 10: Output voltage response to step-change in load current (50%-75% of Io, max; di/dt = 0.1A/µs, Vin=48V). Load cap: 10µF, tantalum capacitor and 1µF ceramic capacitor. Top Trace: Vout (80mV/div, 200us/div); Bottom Trace: Io (10A/div, 200us/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.. ic Vin+ + + Vin- Cs: 220uF 100uF, ESR=0.2 ohm @ 25oC 100KHz Figure 11: 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 below DS_E48SP12020NRFB_05232011 Figure 12: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 12µH source impedance and 100µF electrolytic capacitor (200 mA/div, 2us/div). 5 ELECTRICAL CHARACTERISTICS CURVES Copper Strip Vo(+) 10u 1u SCOPE RESISTIVE LOAD Vo(-) Figure 13: Input reflected ripple current, is, through a 12µH source inductor at nominal input voltage and rated load current (20 mA/div, 2us/div). Figure 14: Output voltage noise and ripple measurement test setup Figure 15: Output voltage ripple at nominal input voltage and rated load current (Io=20A)(20 mV/div, 2us/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_E48SP12020NRFB_05232011 6 DESIGN CONSIDERATIONS Safety 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 33 to 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 E48SP12020XXXX to meet class B in CISSPR 22. Schematic and Components List Vin(+) Vo(+) CY1 Vin CX Cin E48SP12020 LOAD L1 - CY2 Vin(-) Vo(-) CY Cin is 100uF*2 low ESR Aluminum cap; CX is 2.2uF ceramic cap; CY1 are 10nF ceramic caps; CY2 are 10nF ceramic caps; CY is 1nF ceramic cap; L1 is common-mode inductor, L1=0.53mH; Test Result: Vin=48V, Io=20A, 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, CAN/CSA-C22.2, No. 60950-1 and EN60950-1+A11 and IEC60950-1, if the system in which the power module is to be used must meet safety agency requirements. 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: 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. If the metal baseplate / heatspreader is grounded the output must be also grounded. 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 30A 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 Yellow line is quasi peak mode; Blue line is average mode. DS_E48SP12020NRFB_05232011 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. 7 FEATURES DESCRIPTIONS Over-Current Protection Remote On/Off 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. 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. For hiccup mode, the module will try to restart after shutdown. If the overload condition still exists, the module will shut down again. This restart trial will continue until the overload condition is corrected. 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. 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. For hiccup mode, the module will try to restart after shutdown. If the output overvoltage condition still exists, the module will shut down again. This restart trial will continue until the over-voltage condition is corrected. 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(+) Vo(+) R ON/OFF Vi(-) Load Vo(-) 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. Figure 16: Remote on/off implementation 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. DS_E48SP12020NRFB_05232011 8 THERMAL CONSIDERATIONS 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. Hence, the choice of equipment to characterize the thermal performance of the power module is a wind tunnel. 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’’). PWB FACING PWB MODULE AIR VELOCITY AND AMBIENT TEMPERATURE MEASURED BELOW THE MODULE 50.8 (2.0”) AIR FLOW 12.7 (0.5”) Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches) Figure 17: Wind tunnel test setup Thermal Derating 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. DS_E48SP12020NRFB_05232011 9 THERMAL CURVES (WITHOUT HEAT SPREADER) THERMAL CURVES (WITH HEAT SPREADER) Figure 18: Temperature measurement location * The allowed maximum hot spot temperature is defined at 122℃ Figure 20: Temperature measurement location * The allowed maximum hot spot temperature is defined at 110℃ Output Current (A) E48SP12020(Standard) Output Current vs. Ambient Temperature and Air Velocity @Vin = 48V (Transverse Orientation) Output Current (A) E48SP12020(Standard) Output Current vs. Ambient Temperature and Air Velocity @Vin = 48V (Transverse Orientation,With Heatspreader) 20 20 18 18 Natural Convection 16 14 Natural Convection 16 100LFM 14 100LFM 12 200LFM 12 200LFM 10 300LFM 10 300LFM 8 400LFM 8 400LFM 6 500LFM 6 500LFM 4 600LFM 4 600LFM 2 2 0 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (℃) Figure 19: Output current vs. ambient temperature and air velocity @Vin=48V(Transverse Orientation, without heat spreader) DS_E48SP12020NRFB_05232011 0 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (℃) Figure 21: Output current vs. ambient temperature and air velocity @Vin=48V(Transverse Orientation, with heat spreader) 10 PICK AND PLACE LOCATION RECOMMENDED PAD LAYOUT (SMD) SURFACE-MOUNT TAPE & REEL DS_E48SP12020NRFB_05232011 11 LEADED (Sn/Pb) PROCESS RECOMMEND TEMPERATURE PROFILE Temperature (°C ) 250 200 150 Ramp-up temp. 0.5~3.0°C /sec. 2nd Ramp-up temp. Peak temp. 1.0~3.0°C /sec. 210~230°C 5sec. Pre-heat temp. 140~180°C 60~120 sec. Cooling down rate <3°C /sec. 100 Over 200°C 40~50sec. 50 0 60 120 Time ( sec. ) 180 240 300 Note: The temperature refers to the pin of E48SP, measured on the pin +Vout joint. LEAD FREE (SAC) PROCESS RECOMMEND TEMPERATURE 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 E48SP, measured on the pin +Vout joint. DS_E48SP12020NRFB_05232011 12 MECHANICAL DRAWING (WITHOUT HEATSPREADER) SURFACE-MOUNT MODULE DS_E48SP12020NRFB_05232011 THROUGH-HOLE MODULE 13 MECHANICAL DRAWING (WITH HEATSPREADER) *For modules with through-hole pins and the optional heatspreader, they are intended for wave soldering assembly onto system boards, please do not subject such modules through reflow temperature profile. THROUGH-HOLE MODULE Pin No. 1 2 3 4 5 Name +Vin ON/OFF -Vin -Vout +Vout DS_E48SP12020NRFB_05232011 Function Positive input voltage Remote ON/OFF Negative input voltage Negative output voltage Positive output voltage 14 PART NUMBERING SYSTEM E 48 S P 120 20 N R Type of Product Input Voltage Number of Outputs Product Series Output Voltage Output Current ON/OFF Logic Pin Length/Type E- Eighth Brick 48-36V~60V S- Single P - High Power 120 - 12V 20 -20A N- Negative R- 0.170” N- 0.145” M- SMD F B Option Code F- RoHS 6/6 B – 36~60V Vin (Lead Free) MODEL LIST MODEL NAME E48SP12020NRFB INPUT 36V~60V OUTPUT 9A 12V EFF @ 100% LOAD 20A 94.5% 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.delta.com.tw/dcdc USA: Telephone: East Coast: 978-656-3993 West Coast: 510-668-5100 Fax: (978) 656 3964 Email: [email protected] Europe: Telephone: +41 31 998 53 11 Fax: +41 31 998 53 53 Email: [email protected] Asia & the rest of world: Telephone: +886 3 4526107 x 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_E48SP12020NRFB_05232011 15