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| FEATURES High Efficiency: 95.5% @9.6V/31A Standard footprint: 57.9 x 36.8 x 12.7mm (2.28"x1.45"x0.5") Industry standard pin out Fully protected:OTP, OCP, Input OVP, UVLO 2250V isolation Basic insulation No minimum load required Current sharing ISO 9001, TL 9000, ISO 14001, QS 9000, OHSAS 18001 certified manufacturing facility UL/cUL 60950 (US & Canada), and TUV (EN60950) Certified CE mark meets 73/23/EEC and +3/68/EEC directives Delphi Series Q48SB, 300W Bus Converter DC/DC Power Modules: 48V in, 9.6V/31A out The Delphi Series Q48SB, 48V input, single output, quarter brick, 300W bus converters are the latest offering from a world leader in power systems technology and manufacturing -- Delta Electronics, Inc. This product family supports intermediate bus architectures and powers multiple downstream non-isolated point-of-load (POL) converters. The Delphi Series Q48SB operates from a nominal 48V input and provides up to 300W of power or up to 31A of output current in an industry standard quarter brick footprint. The Q48SB product currently supports two input ranges: the Q48SB120 features an input voltage range of 42V to 53V and provides 4:1 unregulated output of 12V at 20A or 25A. The Q48SB108 features a wider input voltage range of 36V to 60V and provides 5:1 unregulated output of 9.6V at up to 31A. Typical efficiency for the 9.6V/31A or 10.8V/28A module is 95.5%. With optimized component placement, creative design topology, and numerous patented technologies, the Q48SB bus converter delivers outstanding electrical and thermal performance. An optional heatsink is available for harsh thermal requirements. OPTIONS Positive On/Off logic Short pin lengths Heatsink available for extended operation APPLICATIONS Datacom / Networking Wireless Networks Optical Network Equipment Server and Data Storage Industrial/Testing Equipment DATASHEET DS_Q48SB10828_11062006 TECHNICAL SPECIFICATIONS (TA=25C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.) PARAMETER ABSOLUTE MAXIMUM RATINGS Input Voltage Continuous Operating 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 Input Over-Voltage Lockout Turn-Off Voltage Threshold Turn-On Voltage Threshold Lockout Hysteresis Voltage 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 Output DC Current-Limit Inception 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, (Logic Low-Module ON) Logic Low Logic High ON/OFF Current GENERAL SPECIFICATIONS MTBF Weight Over-Temperature Shutdown NOTES and CONDITIONS Min. Q48SB10828NRFA Typ. Max. 63 +124 +125 2250 48 35 33 2 63 61 2 5 0.02 10 9.6 10.8 400 4.8 6.6 120 30 0 31 40 150 150 50 20 20 10000 95.5 96.5 2250 10 750 130 500 5 200 12.1 60 36 34 64 62 8 120 15 Units Vdc C C Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc A mA mA A2s mArms Vdc Vdc mV V mV V mV mV A A mV mV us ms ms F % % Vdc M pF kHz 0.8 18 1 2.88 43 127 V V mA M hours grams C Refer to Figure 15 for the measuring point -40 -55 36 34 32 62 60 30 RMS thru 12H inductor, 5Hz to 20MHz Vin=48V, Io=no load, Ta=25C Vin=54V, Io=no load, Ta=25C Io=Io,min to Io,max Vin=36V to 60V Ta=-40C to 85C over sample load, line and temperature 5Hz to 20MHz bandwidth Full Load, 1F ceramic, 10F tantalum Full Load, 1F ceramic, 10F tantalum Output Voltage 10% Low 48V, 10F Tan & 1F Ceramic load cap, 0.1A/s 50% Io.max to 75% Io.max 75% Io.max to 50% Io.max Von/off at Ion/off=1.0mA Von/off at Ion/off=0.0 A Ion/off at Von/off=0.0V Io=80% of Io, max; Ta=25C Refer to Figure 15 for the measuring point 0 2.4 DS_Q48SB10828_11062006 2 ELECTRICAL CHARACTERISTICS CURVES EFFICIENCY (%) 100 36Vin 98 96 94 92 48Vin 60Vin POWER DISSIPATION (W) 24 36Vin 48Vin 60Vin 20 16 12 8 90 88 86 5 10 15 20 25 30 35 OUTPUT CURRENT (A) 4 0 5 10 15 20 25 30 35 OUTPUT CURRENT(A) Figure 1: Efficiency vs. load current for minimum, nominal, and maximum input voltage at 25C 14 VOUT(V) Figure 2: Power loss vs. load current for minimum, nominal, and maximum input voltage at 25C. 12 10 8 6 4 2 0 0 5 10 15 20 25 30 35 40 45 OUTPUT CURENT(A) 36Vin 48Vin 60Vin Figure 3: 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 . DS_Q48SB10828_11062006 3 ELECTRICAL CHARACTERISTIC CURVES Figure 4: Turn-on transient at full rated load current (5 ms/div). Top Trace: Vout; 5V/div; Bottom Trace: ON/OFF input: 5V/div Figure 5: Turn-on transient at zero load current (2 ms/div). Top Trace: Vout: 5V/div; Bottom Trace: ON/OFF input: 5V/div Figure 6: Output voltage response to step-change in load current (50%-75%-50% of Io, max; di/dt = 0.1A/s). Load cap: 10F, tantalum capacitor and 1F ceramic capacitor. Top Trace: Vout (200mV/div), Bottom Trace: Iout (10A/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. Figure 7: Output voltage response to step-change in load current (50%-75%-50% of Io, max; di/dt = 1A/s). Load cap:10uF,tantalum capacitor and 1F ceramic capacitor. Top Trace: Vout (200mV/div), Bottom Trace: Iout (10A/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. Figure 8: 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 H. Capacitor Cs offset possible battery impedance. Measure current as shown above. DS_Q48SB10828_11062006 4 ELECTRICAL CHARACTERISTIC CURVES Figure 9: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 12H source impedance and 100F electrolytic capacitor (200 mA/div). Figure 10: Input reflected ripple current, is, through a 12H source inductor at nominal input voltage and rated load current (5 mA/div). Copper Strip Vo(+) 10u Vo(-) 1u SCOPE RESISTIVE LOAD Figure 11: Output voltage noise and ripple measurement test setup. Figure 12: Output voltage ripple at nominal input voltage and rated load current (50 mV/div). Load capacitance: 1F ceramic capacitor and 10F tantalum capacitor. Bandwidth: 20 MHz. 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_Q48SB10828_11062006 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 H, we advise adding a 47 to 220F electrolytic capacitor (ESR < 0.5 at 100 kHz) mounted close to the input of the module to improve the stability. FEATURES DESCRIPTIONS 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 (hiccup mode). 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. 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. 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 try to restart after shutdown. If the over-temperature condition still exists during restart, the module will shut down again. This restart trial will continue until the temperature is within specification. 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. 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 to floating. Vi(+) Vo(+) ON/OFF Vi(-) Vo(-) Figure 13: Remote on/off implementation DS_Q48SB10828_11062006 6 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 CURVES 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''). FACING PWB PWB 5 Figure 15: Hot spot temperature measured point *The allowed maximum hot spot temperature is defined at 124 Q48SB10828NR (Standard) Output Current vs. Ambient Temperature and Air Velocity @ Vin=48V (Transverse Orientation, Without Heat spreader) 35 Output Current (A) 30 25 Natural Convection 20 100LFM 400LFM 15 200LFM 500LFM 10 300LFM 600LFM MODULE 0 25 35 45 55 65 75 85 Ambient Temperature () AIR VELOCITY AND AMBIENT TEMPERATURE MEASURED BELOW THE MODULE AIR FLOW Figure 16: Output current vs. ambient temperature and air velocity @Vin=48V(Transverse Orientation, without heat spreader) 50.8 (2.0") 35 Output Current (A) Q48SB10828NR (Standard) Output Current vs. Ambient Temperature and Air Velocity @ Vin=48V (Longitudinal Orientation, Without Heat spreader) 30 12.7 (0.5") Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches) 25 Natural Convection 20 100LFM 400LFM 15 Figure 14: Wind tunnel test setup figure 10 200LFM 500LFM Thermal Derating Heat can be removed by increasing airflow over the module. The module's maximum hot spot temperature is +124C. 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_Q48SB10828_11062006 300LFM 600LFM 5 0 25 35 45 55 65 75 85 Ambient Temperature () Figure 17: Output current vs. ambient temperature and air velocity @Vin=48V (Longitudinal Orientation, without heatspreader) 7 THERMAL CURVES Output Current (A) 35 Q48SB10828NR (Standard) Output Current vs. Ambient Temperature and Air Velocity @ Vin=48V (Transverse Orientation, With Heat spreader) 30 25 Natural Convection 20 15 100LFM 400LFM 200LFM 500LFM 10 300LFM 600LFM 5 0 25 35 45 55 65 75 85 Ambient Temperature () Figure 18: Output current vs. ambient temperature and air velocity @Vin=48V(Transverse Orientation, with heat spreader) Output Current (A) 35 Q48SB10828NR (Standard) Output Current vs. Ambient Temperature and Air Velocity @ Vin=48V (Longitudinal Orientation, With Heat spreader) 30 25 Natural Convection 20 100LFM 400LFM 15 200LFM 500LFM 10 300LFM 600LFM 5 0 25 35 45 55 65 75 85 Ambient Temperature () Figure 19: Output current vs. ambient temperature and air velocity @Vin=48V(Longitudinal Orientation, with heat spreader) DS_Q48SB10828_11062006 8 MECHANICAL DRAWING Pin No. 1 2 3 5 6 Name -Vin ON/OFF +Vin +Vout -Vout Function Negative input voltage Remote ON/OFF Positive input voltage Positive output voltage Negative output voltage Pin Specification: Pins 1-3 1.0mm (0.040") diameter Pins 5-6 1.5mm (0.059") diameter All pins are copper with Tin plating DS_Q48SB10828_11062006 9 MECHANICAL DRAWING (WITH HEAT SPREADER) DS_Q48SB10828_11062006 10 PART NUMBERING SYSTEM Q Type of Product Q- Quarter Brick 48 S B Product Series B- Bus Converter 108 Output Voltage 108- 9.6V 28 Output Current 28 - 31A N ON/OFF Logic P- Positive R Pin Length F A Option Code Input Number of Voltage Outputs 48- 48V S- Single N- Negative R- 0.170" N- 0.145" K- 0.110" F- RoHS 6/6 (Lead Free) A- Standard functions H- with heat spreader MODEL LIST MODEL NAME Q48SB10828NRFA Q48SB12020NRFA Q48SB12025NRFA 36V~60V 42V~53V 42V~53V INPUT 6.3A 5A 6.25A 9.6V 12V 12V OUTPUT 31A 20A 25A EFF @ 100% LOAD 95.5% 96% 96% 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 CONTACT: www.delta.com.tw/dcdc USA: Telephone: East Coast: (888) 335 8201 West Coast: (888) 335 8208 Fax: (978) 656 3964 Email: DCDC@delta-corp.com Europe: Telephone: +41 31 998 53 11 Fax: +41 31 998 53 53 Email: DCDC@delta-es.tw Asia & the rest of world: Telephone: +886 3 4526107 x6220 Fax: +886 3 4513485 Email: DCDC@delta.com.twT 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_Q48SB10828_11062006 11 |
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