FEATURES High efficiency: 84% @ 5V/2A Standard footprint Surface mountable Industry standard pin out Low profile: 0.48" Fixed frequency operation Input UVLO, Output OCP, OVP No minimum load required 2:1 input voltage range ISO 9001, TL 9000, ISO 14001, QS9000, OHSAS18001 certified manufacturing facility UL/cUL 60950 (US & Canada) Recognized, and TUV (EN60950) Certified CE mark meets 73/23/EEC and 93/68/EEC directives Delphi Series S48SS, 15W Family DC/DC Power Modules: 48V in, 5V/2A out The Delphi Series S48SS, surface mountable, 48V input, single output, isolated DC/DC converters are the latest offering from one of the world's largest power supply manufacturers Delta Electronics, Inc. This product family provides up to 15 watts of power or up to 4.5A of output current (for 3.3V and below) in an industry standard footprint. With creative design technology and optimization of component placement, the Delphi Series Small Power converters possess outstanding electrical and thermal performance, as well as extremely high reliability under highly stressful operating conditions. All models are protected from abnormal input/output voltage and current conditions. An encapsulated version is available for the most robust performance in harsh environments. APPLICATIONS Telecom/DataCom Wireless Networks Optical Network Equipment Server and Data Storage Industrial/Test Equipment DATASHEET DS_S48SS05002_06082006 1 Delta Electronics, Inc. TECHNICAL SPECIFICATIONS (TA=25C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.) PARAMETER NOTES and CONDITIONS S48SS05002NRFA Min. ABSOLUTE MAXIMUM RATINGS Input Voltage Continuous Transient (100ms) 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 Maximum Input Current No-Load Input Current Off Converter Input Current Inrush Current(I2t) 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 Settling Time to 1% of Final value Turn-On Transient Start-Up Time, From On/Off Control Start-Up Time, From Input Maximum Output Capacitance EFFICIENCY 100% Load ISOLATION CHARACTERISTICS Isolation Voltage Isolation Resistance Isolation Capacitance FEATURE CHARACTERISTICS Switching Frequency ON/OFF Control, (Logic Low-Module ON) Logic Low Logic High ON/OFF Current Leakage Current Output Voltage Trim Range Output Over-Voltage Protection GENERAL SPECIFICATIONS Calculated MTBF Weight 100ms Refer to Figure 12 for the measuring point 1 minute Typ. -40 -55 1500 Output Voltage 10% Low 80 100 100 125 Vdc Vdc C C Vdc 48 75 V 33.8 32.0 0.5 34.5 33.5 1.5 35.8 34.5 2.5 0.5 V V V A mA mA A2s mA dB 5.00 5.10 V 5 5 100 25 15 300 TBD mV mV ppm/ V 50 15 100 25 2 4.4 mV mV A A 75 75 600 100 100 mV mV s 35 35 50 50 470 ms ms F 25 1 0.01 5 55 P-P thru 12H inductor, 5Hz to 20MHz 120 Hz Io=Io,min to Io,max Vin=36V to 75V Tc=-40 to 100 Over sample load, line and temperature 5Hz to 20MHz bandwidth Full Load, 1F ceramic, 10F tantalum Full Load, 1F ceramic, 10F tantalum Units 36 100% Load, 36Vin Vin=48V, Io=50%Io.max, Tc=25C Max. 4.90 TBD 0 2.4 48V, 10F Tan & 1F Ceramic load cap, 0.1A/s 50% Io,max to 75% Io,max 75% Io,max to 50% Io.max 3.4 Full load; 5% overshoot of Vout at startup 82 84 % 500 V M pF 290 kHz 1500 100 Von/off at Ion/off=1.0mA Von/off at Ion/off=0.0 A Ion/off at Von/off=0.0V Logic High, Von/off=15V Across Trim Pin & +Vo or -Vo, Poutmax rated Over full temp range; % of nominal Vout Io=80% of Io, max; Tc=40C 0 -10 115 125 3 12.5 0.8 15 1 50 +10 140 V V mA uA % % M hours grams 2 DS_S48SS05002_06082006 POWER DISSIPATION (W) EFFICIENCY (%) ELECTRICAL CHARACTERISTICS CURVES 90 36Vin 48Vin 75Vin 85 80 75 4.0 36Vin 75Vin 3.0 2.5 70 2.0 65 1.5 60 1.0 55 0.5 50 48Vin 3.5 0.0 0.5 1 1.5 2 OUTPUT CURRENT (A) 0.5 1 1.5 2 OUTPUT CURRENT (A) Figure 1: Efficiency vs. load current for minimum, nominal, and maximum input voltage at 25C. Figure 2: Power dissipation vs. load current for minimum, nominal, and maximum input voltage at 25C. Figure 3: Typical input characteristics at room temperature Figure 4: Turn-on transient at full rated load current (resistive load) (10 ms/div). Top Trace: Vout (2V/div); Bottom Trace: ON/OFF Control (2V/div). 3 DS_S48SS05002_06082006 ELECTRICAL CHARACTERISTICS CURVES Figure 5: Turn-on transient at zero load current (10 ms/div). Top Trace: Vout (2V/div); Bottom Trace: ON/OFF Control (2V/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, 100mESR tantalum capacitor and 1F ceramic capacitor. Top Trace: Vout (50mV/div), Bottom Trace: Iout (1A/div). Figure 7: Test set-up diagram showing measurement points for Input Reflected Ripple Current (Figure 8). Note: Measured input reflected-ripple current with a simulated source Inductance (LTEST) of 12 H. Capacitor Cs offset possible battery impedance. Figure 8: Input Reflected Ripple Current, is, at full rated output current and nominal input voltage with 12H source impedance and 68F electrolytic capacitor (2 mA/div). 4 DS_S48SS05002_06082006 ELECTRICAL CHARACTERISTICS CURVES Copper Strip Vo(+) SCOPE 1u 10u RESISTIVE LOAD Vo(-) OUTPUT VOLTAGE (V) Figure 9: Output voltage noise and ripple measurement test setup. 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 10: Output voltage ripple at nominal input voltage and rated load current (20 mV/div). Load capacitance: 1F ceramic capacitor and 10F tantalum capacitor. Bandwidth: 20 MHz. 6.0 5.0 4.0 3.0 2.0 1.0 Vin=48V 0.0 0.0 1.0 2.0 3.0 4.0 5.0 LOAD CURRENT (A) Figure 11: Output voltage vs. load current showing typical current limit curves and converter shutdown points. 5 DS_S48SS05002_06082006 THERMAL CURVES: S48SS05002NR A Output Current vs. Ambient Temperature and Air Velocity @Vin < 60V Output Current(A) 2.1 600LFM 1.8 500LFM Natural Convection 1.5 400LFM 1.2 100LFM 0.9 200LFM 0.6 300LFM 0.3 0.0 Top View 80 Figure 12: Case temperature measurement location. Pin locations are for reference only. 90 95 100 Ambient Temperature () Figure 13: Output current vs. ambient temperature and air velocity (Vin<60V) S48SS05002NR A Output Current vs. Ambient Temperature and Air Velocity @Vin =75V 2.1 85 Output Current(A) S48SS05002NR A Power Dissipation vs. Ambient Temperature and Air Velocity 2.7 600LFM Power Dissipation (Watts) 600LFM 2.4 1.8 2.1 500LFM 500LFM 1.5 Natural Convection 1.8 Natural Convection 1.2 400LFM 400LFM 1.5 100LFM 100LFM 0.9 1.2 200LFM 0.9 200LFM 0.6 0.6 0.3 300LFM 300LFM 0.3 0.0 0.0 75 80 85 90 95 100 Ambient Temperature () Figure 14: Output current vs. ambient temperature and air velocity (Vin=75V) 75 80 85 90 95 100 105 Ambient Temperature () Figure 15: Power dissipation vs. ambient temperature and air velocity 6 DS_S48SS05002_06082006 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 10 to 100 F electrolytic capacitor (ESR < 0.7 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. 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 1A 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. Safety Considerations The power module must be installed in compliance with the spacing and separation requirements of the enduser's safety agency standard if the system in which the power module is to be used must meet safety agency requirements. When the input source is 60Vdc or below, 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 any hazardous voltages, including the ac mains, with reinforced insulation. One Vi pin and one Vo pin are grounded, or all the input and output pins are kept floating. The input terminals of the module are not operator accessible. A SELV reliability test is conducted on the system where the module is used to ensure that under a single fault, hazardous voltage does not appear at the module's output. Do not ground one of the input pins without grounding one of the output pins. This connection may allow a nonSELV voltage to appear between the output pin and ground. 7 DS_S48SS05002_06082006 FEATURES DESCRIPTIONS Over-Current Protection Ex. When trim-down -10% (5V x 0.9 = 4.5V) 35.381 - 47.05 x 0.1 Rtrim - down = - 6.49 = 52.96[] 5 x 0.1 + 0.016 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). Vo(+) 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. Vo(-) 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 latch off. The over-voltage latch is reset by either cycling the input power or by toggling the on/off signal for one second. Output Voltage Adjustment (TRIM) To increase or decrease the output voltage set point, the modules may be connected with an external resistor between the TRIM pin and either the Vo+ or Vo -. The TRIM pin should be left open if this feature is not used. Trim R trim-up Figure 17: Circuit configuration for trim-up (increase output voltage) If the external resistor is connected between the TRIM and Vo - the output voltage set point increases. The external resistor value required to obtain a percentage output voltage change Vo% is defined as: Rtrim - up = 11.668 - 6.49[ ] 5Vo - 0.016 Ex. When trim-up +10% (5V x 1.1 = 5.5V) 11.668 Rtrim - up = - 6.49 = 17.62[] 5 x 0.1 - 0.016 Care should be taken to ensure that the maximum output power of the module remains at or below the maximum rated power. Vo(+) Remote ON/OFF Trim R trim-down Vo(-) Figure 16: Circuit configuration for trim-down (decrease output voltage) If the external resistor is connected between the TRIM and Vo+ pins, the output voltage set point decreases. The external resistor value required to obtain a percentage of output voltage change Vo% is defined as: Rtrim - down = 35.381 - 47.05Vo - 6.49[ ] 5Vo + 0.016 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. If the remote on/off feature is not used, please short the on/off pin to Vi(-) for negative logic and let the pin open for positive logic. Vi(+) Vo(+) ON/OFF Trim Vi(-) Vo(-) Figure 18: Circuit Configuration for Remote ON/OFF 8 DS_S48SS05002_06082006 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. PWB FACING PWB MODULE AIR VELOCITY AND AMBIENT TEMPERATURE MEASURED BELOW THE MODULE 50.8 (2.0") AIR FLOW 10 (0.4") Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches) Figure 19: Wind tunnel test setup 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 or a heat sink is 6.35mm (0.25"). Thermal Derating Heat can be removed by increasing airflow over the module. Figure 13 and 14 show maximum output is a function of ambient temperature and airflow rate. The module's maximum case temperature is +100C. 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. 9 DS_S48SS05002_06082006 MECHANICAL DRAWING Pin No. Name Function 1 2 3 4 5 6 7 8 9 10 11 12 +Vout -Vout Trim NC NC NC NC ON/OFF NC NC -Vin +Vin Positive output voltage Negative output voltage Output voltage trim No Connection No Connection No Connection No Connection ON/OFF Logic No Connection No Connection Negative input voltage Positive input voltage 10 DS_S48SS05002_06082006 PART NUMBERING SYSTEM S 48 S S 050 02 N R Form Factor Input Voltage Number of Outputs Product Series Output Voltage Output Current ON/OFF Logic Pin Type F S- Small Power 48V S- Single S- SMD 050- 5.0V 02- 2A N- Negative P- Positive R- SMD Pin A Option Code F- RoHS 6/6 (Lead Free) A- standard Function MODEL LIST MODEL NAME S48SS1R805NRFA S48SS2R504NRFA S48SS3R303NRFA S48SS3R304NRFA S48SS05002NRFA S48SS05003NRFA S48SS12001NRFA INPUT 36V~75V 36V~75V 36V~75V 36V~75V 36V~75V 36V~75V 36V~75V OUTPUT 0.5A 0.5A 0.5A 0.6A 0.5A 0.6A 0.6A 1.8V 2.5V 3.3V 3.3V 5.0V 5.0V 12V EFF @ 100% LOAD 5.0A 4.5A 3.0A 4.5A 2.0A 3.0A 1.25A 80.0% 83.0% 84.0% 86.0% 84.0% 86.5% 86.5% 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: Phone: +41 31 998 53 11 Fax: +41 31 998 53 53 Email: DCDC@delta-es.com Asia & the rest of world: Telephone: +886 3 4526107 ext 6220 Fax: +886 3 4513485 Email: DCDC@delta.com.tw 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. 11 DS_S48SS05002_06082006