FEATURES High efficiency: 84% @ 1.2V/ 12A Size: 47.2mm x 29.5mm x 8.35mm (1.86" x 1.16" x 0.33") Low profile: 0.33" Industry standard footprint and pin out Surface mountable Fixed frequency operation Input UVLO, Output OCP, OVP No minimum load required 2:1 input voltage range Basic insulation 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 directive Delphi Series S48SA, 33W Family DC/DC Power Modules: 48V in, 1.2V/12A out The Delphi Series S48SA, surface mountable, 48V input, single output, isolated DC/DC converters are the latest offering from a world leader in power system and technology and manufacturing – Delta Electronics, Inc. This product family provides up to 33 watts of power or up to 12A of output current (1.8V or below). 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 protected from abnormal input/output voltage and current conditions. OPTIONS Positive on/off logic SMD or Through hole mounting APPLICATIONS Telecom/DataCom Wireless Networks Optical Network Equipment Server and Data Storage Industrial/Test Equipment DATASHEET DS_S48SA1R212_05122006 Delta Electronics, Inc. TECHNICAL SPECIFICATIONS (TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted) PARAMETER NOTES and CONDITIONS S48SA1R212NRFA 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(Hiccup) GENERAL SPECIFICATIONS Calculated MTBF Weight Over-Temperature Shutdown 100ms Refer to Figure 18 for measuring point 1 minute Typ. -40 -55 1500 Output Voltage 10% Low 80 100 102 125 Vdc Vdc °C °C Vdc 48 75 V 32.5 30.5 1 34 32 2 35.5 33.5 3 0.85 V V V A mA mA A2s mA dB 1.20 1.23 V ±2 ±2 100 ±10 ±5 300 1.25 mV mV ppm/℃ V 30 5 75 20 12 18 mV mV A A 35 35 200 100 100 mV mV µs 6 6 12 12 2200 ms ms µF 35 7 0.01 5 50 P-P thru 12µH inductor, 5Hz to 20MHz 120 Hz Io=Io,min to Io,max Vin=36V to75V Ta=-40℃ to 85℃ Over sample load, line and temperature 5Hz to 20MHz bandwidth Full Load, 1µF ceramic, 10µF tantalum Full Load, 1µF ceramic, 10µF tantalum Units 36 100% Load, 36Vin Vin=48V, Io=50%Io.max, Ta=25℃ Max. 1.17 1.15 0 13.2 48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs 50% Io,max to 75% Io,max 75% Io,max to 50% Io.max 15.6 Full load; 5% overshoot of Vout at startup 82 84 % 1500 V MΩ pF 330 kHz 1500 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 Across Trim Pin & +Vo or –Vo, Pout≦max rated Over full temp range; % of nominal Vout Io=80% of Io, max; Tc=40°C Refer to Figure 18 for measuring point 0 -10 115 125 TBD 18 115 0.8 15 1 50 +10 160 V V mA uA % % hours grams °C 2 DS_S48SA1R212_05122006 90 POWER DISSIPATION (W) EFFICIENCY (%) ELECTRICAL CHARACTERISTICS CURVES 85 80 75 4.0 3.5 3.0 2.5 70 2.0 65 1.5 36Vin 60 36Vin 1.0 48Vin 48Vin 75Vin 55 0.5 50 0.0 1 2 3 4 5 6 7 8 9 10 11 12 75Vin 1 2 3 4 5 6 7 8 9 10 11 12 OUTPUT CURRENT (A) OUTPUT CURRENT (A) INPUT CURRENT (A) 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. 0.6 Io=10A Io=6A 0.5 Io=1A 0.4 0.3 0.2 0.1 0.0 30 35 40 45 50 55 60 65 70 75 INPUT VOLTAGE (V) Figure 3: Typical input characteristics at room temperature. Figure 4: Turn-on transient at full rated load current (1 ms/div). Top Trace: Vout (500mV/div); Bottom Trace: ON/OFF Control (5V/div). 3 DS_S48SA1R212_05122006 ELECTRICAL CHARACTERISTICS CURVES Figure5: Turn-on transient at zero load current (1 ms/div). Top Trace: Vout (500mV/div); Bottom Trace: ON/OFF Control (5V/div). Figure 6: Output voltage response to step-change in load current (50%-75% of Io, max; di/dt = 0.1A/µs). Load cap: 10µF, 100 mΩESR tantalum capacitor and 1µF ceramic capacitor. Top Trace: Vout (20mV/div), Bottom Trace: Iout (5A/div). Figure 7: Output voltage response to step-change in load current (75%-50% of Io, max; di/dt = 0.1A/µs). Load cap: 10µF, 100 mΩESR tantalum capacitor and 1µF ceramic capacitor. Top Trace: Vout (20mV/div), Bottom Trace: Iout 5A/div). Figure 8: Test set-up diagram showing measurement points for Input Reflected Ripple Current (Figure 9). Note: Measured input reflected-ripple current with a simulated source Inductance (LTEST) of 12 µH. Capacitor Cs offset possible battery impedance. 4 DS_S48SA1R212_05122006 ELECTRICAL CHARACTERISTICS CURVES Copper Strip Vo(+) 10u 1u SCOPE RESISTIVE LOAD Vo(-) Figure 10: 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. OUTPUT VOLTAGE (V) Figure 9: Input Reflected Ripple Current, is, at full rated output current and nominal input voltage with 12µH source impedance and 33µF electrolytic capacitor (2 mA/div). 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0.0 Vin=48V 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 LOAD CURRENT (A) Figure 11: Output voltage ripple at nominal input voltage and rated load current (10 mV/div). Load capacitance: 1µF ceramic capacitor and 10µF tantalum capacitor. Bandwidth: 20 MHz. Figure 12: Output voltage vs. load current showing typical current limit curves and converter shutdown points. 5 DS_S48SA1R212_05122006 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 10 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. 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 3A 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. 6 DS_S48SA1R212_05122006 FEATURES DESCRIPTIONS Vi(+) Over-Current Protection Sense(+) 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. 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 overvoltage set point, the module will shut down (Hiccup mode). The modules will try to restart after shutdown. If the fault condition still exists, the module will shut down again. This restart trial will continue until the fault condition is corrected. Over-Temperature Protection ON/OFF Sense(-) Vi(-) 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. Vo(-) Figure 13: Remote on/off implementation Remote Sense (Optional) 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). 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 overtemperature condition still exists during restart, the module will shut down again. This restart trial will continue until the temperature is within specification. Vo(+) Vi(+) Vo(+) Sense(+) Sense(-) Contact Resistance Vi(-) Vo(-) Contact and Distribution Losses Figure 14: Effective circuit configuration for remote sense operation 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. 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. 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. 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. 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. Care should be taken to ensure that the maximum output power does not exceed the maximum rated power. 7 DS_S48SA1R212_05122006 FEATURES DESCRIPTIONS (CON.) percentage output voltage change △Vo% is defined as: 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. Rtrim − up = 15.9(100 + ∆Vo%) − 1089 − 62[ΚΩ] ∆Vo% Ex. When trim-up +10% (1.2V X 1.1 = 1.32V) Rtrim − up = 15.9(100 + 10) − 1089 − 62 = 4[ΚΩ] 10 Care should be taken to ensure that the maximum output power of the module remains at or below the maximum rated power. Figure 15: Circuit configuration for trim-down (decrease output voltage) If the external and Vo- pins, The external percentage of as: resistor is connected between the TRIM the output voltage set point decreases. resistor value required to obtain a output voltage change △Vo% is defined Rtrim − down = 1089 − 62[ΚΩ] ∆Vo % Ex. When trim-down –10% (1.2V X 0.9 = 1.08V) Rtrim − down = 1089 − 62 = 46.9[ΚΩ] 10 Figure 16: Circuit configuration for trim-up (increase output voltage) If the external resistor is connected between the TRIM and Vo+ pins, the output voltage set point increases. The external resistor value required to obtain a 8 DS_S48SA1R212_05122006 THERMAL CONSIDERATIONS THERMAL CURVES 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 or a heat sink is 6.35mm (0.25”). Figure 18: Hot spot temperature measured point ＊The allowed maximum hot spot temperature is defined at 102℃ 14 Thermal Derating 12 Heat can be removed by increasing airflow over the module. Figure 19 shows maximum output is a function of ambient temperature and airflow rate. 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. 10 S48SA1R212(Standard) Output Current vs. Ambient Temperature and Air Velocity @ Vin = 48V (Either Orienation) Output Current(A) 600LFM 500LFM Natural Convection 8 100LFM 200LFM 4 300LFM 2 PWB FACING PWB 400LFM 6 0 65 70 75 80 85 90 95 100 105 Ambient Temperature (℃) MODULE Figure 19: Output current vs. ambient temperature and air velocity @ Vin=48V 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 17: Wind tunnel test setup 9 DS_S48SA1R212_05122006 PICK AND PLACE LOCATION SURFACE-MOUNT TAPE & REEL RECOMMENDED PAD LAYOUT (SMD) 10 DS_S48SA1R212_05122006 LEADED (Sn/Pb) PROCESS RECOMMEND TEMP. 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 S48SA, 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℃ Preheat time 100~140 sec. 150℃ Time Limited 90 sec. above 217℃ Ramp up max. 3℃/sec. 25℃ Time Note: The temperature refers to the pin of S48SA, measured on the pin +Vout joint. 11 DS_S48SA1R212_05122006 MECHANICAL DRAWING Surface-Mount Module Pin No. 1 2 6 8 11 12 Name +Vout -Vout Trim ON/OFF -Vin +Vin Function Positive output voltage Negative output voltage Output voltage trim ON/OFF logic Negative input voltage Positive input voltage Optional Pin 4 5 9 Name +Sense (Option) -Sense (Option) NC Function Positive sense pin Negative sense pin No connection Through-Hole Module 12 DS_S48SA1R212_05122006 PART NUMBERING SYSTEM S Form Factor 48 Input Voltage S Number of Outputs S- Small Power 48- 48V S- Single A Product Series 1R2 Output Voltage A- Advanced 1R2-1.2V 1R5-1.5V 1R8-1.8V 2R5-2.5V 3R3- 3.3V 050- 5.0V 120- 12V 12 Output Current 03- 3.0V 06- 6.6A 10- 10A 12- 12A N ON/OFF Logic R Pin Type F A* Option Code N- Negative R- SMD F- RoHS 6/6 A- 9 pins, no sense P- Positive T-Through hole (Lead Free) B- 6 pins, no sense C- 9 pins with sense (12V has option B only) * Option code A includes 9 pins. Pins 4, 5, and 9 have no connection. Option code B excludes pin 4, 5, and 9 (total 6 pins). Option code C features 9 pins with sense function. MODEL LIST MODEL NAME INPUT OUTPUT EFF @ 100% LOAD S48SA1R212NRFA 36V~75V 0.85A 1.2V 12A 84.0% S48SA1R512NRFA 36V~75V 0.85A 1.5V 12A 88.0% S48SA1R812NRFA 36V~75V 0.85A 1.8V 12A 88.0% S48SA2R510NRFA 36V~75V 1.3A 2.5V 10A 88.5% S48SA3R310NRFA 36V~75V 1.3A 3.3V 10A 90.5% S48SA05006NRFA 36V~75V 1.3A 5.0V 6.6A 90.5% S48SA12003NRFB 36V~75V 1.3A 12V 3.0A 90.0% CONTACT: www.delta.com.tw/dcdc USA: Telephone: East Coast: (888) 335 8201 West Coast: (888) 335 8208 Fax: (978) 656 3964 Email: [email protected] Europe: Phone: +41 31 998 53 11 Fax: +41 31 998 53 53 Email: [email protected] Asia & the rest of world: Telephone: +886 3 4526107 ext 6220 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. 13 DS_S48SA1R212_05122006