Q48SK12448NNFB 600W DC/DC Power Modules FEATURES High efficiency: 96.2% @ 12V/50A out Max output power is up to 800 watts(4 ms) size(with heat spreader): 58.4 x 36.8 x 12.9mm (2.30”x1.45”x0.51”) Standard footprint Pre-bias startup No minimum load required External with 450uF minimum capacitance Fixed frequency operation Input UVLO, output OCP, OVP, OTP Hiccup output over current protection (OCP) Latch output over voltage protection (OVP) Auto recovery OTP and input UVLO 1500V isolation and function insulation ISO 9001, TL 9000, ISO 14001, QS 9000, OHSAS 18001 certified manufacturing facility Q48SK12448NNFB, For 600W Quarter Brick DC/DC Power Modules: 46~60V in, 12V/ 50A out UL/cUL 60950 (US & Canada) certification OPTIONS OVP hiccup or latch mode The Delphi Module Q48SK12448NNFB, Quarter Brick, 46~60V input, single output, isolated DC/DC converter is the latest offering from a world leader in power system and technology and manufacturing ― Delta Electronics, Inc. This product provides up to 600 watts of power in an industry standard footprint and pin out. With creative design technology and optimization of component placement, these converters possess outstanding electrical and thermal performances, as well as extremely high reliability under highly stressful operating conditions. The Q48SK12448NNFB offers more than 96.2% high efficiency at 50A load. The Q48SK12448NNFB is fully protected from abnormal input/output voltage, current, and temperature conditions and meets all safety requirements with basic insulation. DATASHEET DS_Q48SK12448NNFB_10222015 APPLICATIONS Telecom / Datacom Wireless Networks Optical Network Equipment Server and Data Storage Industrial / Testing Equipment E-mail: [email protected] http://www.deltaww.com/dcdc P1 TECHNICAL SPECIFICATIONS (TA=25°C, airflow rate=300 LFM, Vin=54Vdc, nominal Vout unless otherwise noted; PARAMETER NOTES and CONDITIONS Q48SK12448NNFB Min. ABSOLUTE MAXIMUM RATINGS Input Voltage Continuous Operating Ambient temperature Storage Temperature Input/Output Isolation Voltage Min time interval between trun off to next turn on INPUT CHARACTERISTICS Operating Input Voltage Input Under-Voltage Lockout Turn-On Voltage Threshold Turn-Off Voltage Threshold Lockout Hysteresis Voltage Maximum Input Current Maximum Input Current No-Load Input Current Off Converter Input Current Inrush Current (I2t) Input Reflected-Ripple Current 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 Operating Output Current Range Output DC Current-Limit Inception Start afford load time, From On/Off Control 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 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 Current (for both remote on/off logic) Leakage Current (for both remote on/off logic) Output Over-Voltage Protection GENERAL SPECIFICATIONS MTBF Weight(with heat spreader) Over-Temperature Shutdown (Hot Spot) -40 -55 Max. Units 60 85 125 1500 Vdc °C °C Vdc ms 20 50A Load, 46Vin 800 watts Load for 4ms, 46Vin Vin=54V, Io=0A Vin=54V, Io=0A 46 54 60 Vdc 42 40 44 42 2 46 44 Vdc Vdc Vdc A A mA mA A2s mA 80 7 P-P thru 12µH inductor, 5Hz to 20MHz Vin=54V, Io=0, Tc=25°C 160 15 15 19.5 210 20 1 250 11.9 Vin=54V, Io=Io min to Io max Vin=46V to 60V, Io=Io min Vin=54V, Tc= min to max case temperatrue over sample load, line and temperature 20MHz bandwidth Full Load, 1µF ceramic,10µF tantalum,450uF Oscon Full Load, 1µF ceramic,10µF tantalum,450uF Oscon 11.4 800 watts Load for 4ms Output Voltage 10% Low 0 0 73 2 12 12.1 Vdc 130 12.6 mV mV mV Vdc 30 20 250 20 , 1µF ceramic,10µF tantalum,450uF Oscon 0.1A/µs 50% to 75% of full load 75% to 50% of full load 350 60 50 67 87 mV mV A A A s 200 200 350 350 450 mV mV µs 90 90 120 120 8900 ms ms µF 96.2 96.0 96.7 96.5 % % 1500 1000 Vdc MΩ pF 180 kHz 80 Vin slew rate: 10V/mS 60 60 Low ESR CAP (OSCON), 100% load; Vin=54V Vin=54V 10 Von/off at Ion/off=1.0mA Von/off at Ion/off=0.0 µA Ion/off at Von/off=0.0V Logic High, Von/off=15V Over full temp range 14 Io=80% of Io, max; Ta=25°C 2.1 0 2 0.8 50 1 50 16 74.5 Refer to Figure18 for Hot spot location (54Vin,80%Io, 200LFM,Airflow from Vin+ to Vin-) Over-Temperature Shutdown (NTC Resistor) Note: Please attach thermocouple on NTC resistor to test OTP function, the hot spot’s temperature is just for reference. DS_Q48SK12448NNFB_10222015 Typ. V V mA uA Vdc M hours grams 125 °C 130 °C E-mail: [email protected] http://www.deltaww.com/dcdc P2 ELECTRICAL CHARACTERISTICS CURVES Figure 1: Efficiency vs. load current for 46V, 54V, and 60V input voltage at 25°C. Figure 2: Power dissipation vs. load current for 46V, 54V, and 60V input voltage at 25°C. Figure 3: full load input characteristics at room temperature. DS_Q48SK12448NNFB_10222015 E-mail: [email protected] http://www.deltaww.com/dcdc P3 ELECTRICAL CHARACTERISTICS CURVES For Negative Remote On/Off Logic Figure 4: Turn-on transient at zero load current) (20ms/div). Top Trace: Vout; 5V/div; Bottom Trace: ON/OFF input: 10V/div. Figure 5: Turn-on transient at full load current (20 ms/div). Top Trace: Vout: 5V/div; Bottom Trace: ON/OFF input: 10V/div. For Input Voltage Start up Figure 6: Turn-on transient at zero load current (20 ms/div). Top Trace: Vout; 5V/div; Bottom Trace: input voltage: 50V/div. DS_Q48SK12448NNFB_10222015 Figure 7: Turn-on transient at full load current (20 ms/div). Top Trace: Vout; 5V/div; Bottom Trace: input voltage: 50V/div. E-mail: [email protected] http://www.deltaww.com/dcdc P4 ELECTRICAL CHARACTERISTICS CURVES Figure 8: Output voltage response to step-change in load current (75%-50% of full load; di/dt = 0.1A/µs). Load cap: 10µF, tantalum capacitor ,1µF ceramic capacitor and 450uF Oscon capacitor. Top Trace: Vout; 200mV/div; Bottom Trace: output current: 20A/div, Time: 500us/div Figure 9: Output voltage response to step-change in load current (50%-75% of full load; di/dt = 0.1A/µs). Load cap: 10µF, tantalum capacitor ,1µF ceramic capacitor and 450uF Oscon capacitor. Top Trace: Vout; 200mV/div; Bottom Trace: output current: 20A/div, Time: 500us /div Figure 10: 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 11: Input Terminal Ripple Current, ic, at max output current and nominal input voltage with 12µH source impedance and 100µF electrolytic capacitor (0.5 A/div，2us/div). DS_Q48SK12448NNFB_10222015 E-mail: [email protected] http://www.deltaww.com/dcdc P5 ELECTRICAL CHARACTERISTICS CURVES Figure 12: Input reflected ripple current, is, through a 12µH source inductor at nominal input voltage and max load current (20mA/div，2us/div). Figure 13: Output voltage noise and ripple measurement test setup. Figure 14: Output voltage ripple at nominal input voltage and max load current (50 mV/div, 20ms/div) Load capacitance: 10µF tantalum capacitor ,1µF ceramic capacitor and 450uF Oscon capacitor. Bandwidth: 20 MHz. Figure 15: Output voltage vs. load current showing typical current limit curves and converter shutdown points. DS_Q48SK12448NNFB_10222015 E-mail: [email protected] http://www.deltaww.com/dcdc P6 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 100μF 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. Application notes to assist designers in addressing these issues are pending release. Safety Considerations 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 normal-blow fuse with 60A 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. FEATURES DESCRIPTIONS Over-Current Protection The modules include an internal output over-current protection circuit. If the output current exceeds the OCP set point, the modules will shut down (hiccup mode).The hiccup time will last 2s. The modules 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. 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 (latch mode) and keep not restart again until module restart up by input voltage. If hiccup mode is needed for OVP, please contact with Delta. 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. The module will restart after 2s . Remote On/Off The remote on/off feature on the module is negative logic. Negative logic turns the module on during a logic low and off during a logic high. If the remote on/off feature is not used, please short the on/off pin to Vi (-). 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. Figure 16: Remote on/off implementation DS_Q48SK12448NNFB_10222015 E-mail: [email protected] http://www.deltaww.com/dcdc P7 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. THERMAL CURVES (WITH HEAT SPREADER) AIRFLOW 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 185mmX185mm,70μm (2Oz),6 layers test board 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’’). Figure 18: * Hot spot temperature measured point. The allowed maximum hot spot temperature is defined at 110℃ Output Current(A) Q48SK12448NNFB Output Current vs. Ambient Temperature and Air Velocity @Vin = 54V (Transverse Orientation,With Heat Spreader) 50 600LFM 45 40 35 PWB FANCING PWB Natural Convection 30 25 MODULE 100LFM 20 200LFM 15 300LFM 10 400LFM 5 AIR VELOCITY AND AMBIENT TEMPERATURE SURED BELOW THE MODULE 500LFM 0 50.8(2.00") 25 AIR FLOW 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=54V(Transverse Orientation,With Heat Spreader, Airflow from Vin+ to Vin-) 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_Q48SK12448NNFB_10222015 E-mail: [email protected] http://www.deltaww.com/dcdc P8 MECHANICAL DRAWING Pin No. 1 2 3 4 5 Name +Vin ON/OFF -Vin -Vout +Vout Function Positive input voltage Remote ON/OFF Negative input voltage Negative output voltage positive output voltage Pin Specification: Pins 1,2,3 1.00mm (0.040”) diameter Pins 4,5 2. 1.50mm (0.060”) diameter All pins are copper with matte Tin plating and Nickel under plating DS_Q48SK12448NNFB_10222015 E-mail: [email protected] http://www.deltaww.com/dcdc P9 RECOMMENDED LAYOUT PART NUMBERING SYSTEM Q 48 S K 124 48 N N Form Factor Input Voltage Number of Outputs Product Series Output Voltage Output Current On/Off Logic Pin Length 48 46~60V S - Single K - high power 124 - 12.0V 48 - 50A Nnegative N - 0.145” Y - 0.197” Q - QB F B Option Code F- RoHS 6/6 (Lead Free) B - Heat spreader MODEL LIST Efficiency Model Name Packaging Input Voltage Output Voltage Output Current Q48SK12448NNFB Through hole 46~60V 12V 50A 96.2% Q48SK12448NYFB Through hole 46~60V 12V 50A 96.2% 54Vin, 12Vdc @ 50A * 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. CONTACT: www.deltaww.com/dcdc Email: [email protected] USA: Telephone: East Coast: 978-656-3993 West Coast: 510-668-5100 Fax: (978) 656 3964 Europe: Telephone: +31-20-655-0967 Fax: +31-20-655-0999 Asia & the rest of world: Telephone: +886 3 4526107 x6220~6224 Fax: +886 3 4513485 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_Q48SK12448NNFB_10222015 E-mail: [email protected] http://www.deltaww.com/dcdc P10