FEATURES High efficiency: 88.5% @ 3.3V/8A Size: 47.20mmx29.5mmx8.15mm (1.86”x1.16”x0.32”) Wide input voltage range: 18V~60V Standard footprint Surface mountable Industry standard pin out Fixed frequency operation Input UVLO, OVLO, Output OCP, OVP, OTP No minimum load required 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 S36SA, 25W Family DC/DC Power Modules: 18Vin to 60Vin, 3.3V/8A out OPTIONS Positive On/Off logic The Delphi Series S36SA, surface mountable, single output, isolated DC/DC converter, is the latest offering from a world leader in power systems technology and manufacturing – Delta Electronics, Inc. This product family provides up to 25 watts of power or up to 8A of output current 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. APPLICATIONS Telecom/DataCom Wireless Networks Optical Network Equipment Server and Data Storage Industrial/Test Equipment DATASHEET DS_S36SA3R308_04062006 Delta Electronics, Inc. TECHNICAL SPECIFICATIONS (TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.) PARAMETER NOTES and CONDITIONS S36SA3R308NRFA 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 (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 100% 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 Leakage Current Output Voltage Trim Range Output Voltage Remote Sense Range Output Over-Voltage Protection GENERAL SPECIFICATIONS MTBF Weight Over-Temperature Shutdown 100ms Refer to Figure 13 for measuring point 1 minute Typ. Max. Units 65 100 100 125 Vdc Vdc °C °C Vdc 60 Vdc 18 17 2 2.1 100 10 1 Vdc Vdc Vdc A mA mA A2s mA dB 3.30 3.35 Vdc ±3 ±3 ±15 ±12 ±10 3.44 mV mV mV mV 50 10 100 30 8 150 mV mV A % 80 80 200 200 200 mV mV us 6 7 15 15 3000 ms ms µF -40 -55 1500 18 16 15 0.7 17 16 1.5 100% Load, 18Vin 45 4 0.003 15 50 P-P thru 12µH inductor, 5Hz to 20MHz 120 Hz Vin=48V, Io=Io.max, Tc=25C Io=Io,min to Io,max Vin=18V to60V Tp=-40°C to 100°C over sample load, line and temperature 5Hz to 20MHz bandwidth Full Load, 1µF ceramic, 10µF tantalum Full Load, 1µF ceramic, 10µF tantalum Output Voltage 10% Low 3.25 3.16 0 110 48V, 10µF Tan & 1µF Ceramic load cap, 1A/µs 50% Io,max to 100% Io,max 100 % Io,max to 50% Io,max Full load; 5% overshoot of Vout at startup Vin=48V Vin=24V 86.5 87.5 88.5 89.5 % % 1500 Vdc MΩ PF 350 kHz 1500 100 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 Pins 9 & 5, Pout ≦ max rated power Pout ≦ max rated power Over full temp range; % of nominal Vout Io=80% of Io, max; Tc=40°C Refer to Figure 13 for measuring point 2 -10 115 122 5.8 16.9 105 0.7 18 1 50 10 10 135 V V mA uA % % % Mhour grams °C 2 ELECTRICAL CHARACTERISTICS CURVES 4.5 90 POWER DISSIPATION (W) 4.0 EFFICIENCY (%) 80 70 18Vin 24Vin 60 3.5 3.0 2.5 2.0 18Vin 48Vin 24Vin 60Vin 1.5 48Vin 60Vin 1.0 50 1 2 3 4 5 6 7 8 OUTPUT CURRENT (A) 1 2 3 4 5 6 7 8 OUTPUT 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. 2.2 2 Io=8A Io=4.8A 1.8 Io=0.8A input current (A) 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 10 15 20 25 30 35 40 45 50 55 60 input voltage (V) Figure 3: Typical input characteristics at 25°C. Figure 4: Turn-on transient at full load current (Constant resistance mode) (1 ms/div). Vin: 48V; Top Trace: Vout (1V/div); Bottom Trace: ON/OFF Control (5V/div). 3 ELECTRICAL CHARACTERISTICS CURVES Figure5: Turn-on transient at zero load current (Constant resistance mode) (1 ms/div). Vin: 48V; Top Trace: Vout (1V/div); Bottom Trace: ON/OFF Control (5V/div). Figure 6: Output voltage response to step-change in load current (50%-100% of Io, max; di/dt = 1A/µs). Load cap: 10µF, 100 mΩ ESR tantalum capacitor and 1µF ceramic capacitor. Top Trace: Vout (50mV/div, 100 us/div), Bottom Trace: Iout (2.42A/div). is TEST 12uH Cs:68uF/100V ESR< 0.3Ω ﹫ 20℃100KHz Vi(+) 68uF/100V ESR< 0.3Ω ﹫ 20℃100KHz Vi(-) Figure 7: Output voltage response to step-change in load current (100%-50% of Io, max; di/dt = 1A/µs). Load cap: 10µF, 100 mΩESR tantalum capacitor and 1µF ceramic capacitor. Top Trace: Vout (50mV/div, 100 us/div), Bottom Trace: Iout (2.42A/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 ELECTRICAL CHARACTERISTICS CURVES Copper Strip Vo(+) 10u SCOPE 1u RESISTIVE LOAD Vo(-) Figure 9: Input reflected ripple current, is, at full rated output current and nominal input voltage with 12µH source impedance and 68µF electrolytic capacitor (20 mA/div). 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. 3.5 3 OUTPUT VOLTAGE (V) 2.5 2 1.5 1 0.5 48V 0 0 Figure 11: Output voltage ripple at nominal input voltage and rated load current (20 mV/div). Load capacitance: 1µF ceramic capacitor and 10µF tantalum capacitor. Bandwidth: 20 MHz. 2 4 6 8 10 12 LOAD CURRENT (A) Figure 12: Output voltage vs. load current showing typical current limit curves and converter shutdown points. 5 THERMAL DERATING CURVE Hot spot S36SA3R308NR A Output Load vs. Ambient Temperature and Air Velocity (De-rating Curve, Either Orientation, no heatsink) Output Current(A) 9 600LFM 8 500LFM 7 Natural Convection 6 400LFM 5 100LFM 4 150LFM 3 200LFM 2 300LFM 1 0 55 Figure 13: Hot spot location 60 65 70 75 80 85 90 95 Ambient Temperature (℃) Figure 14: Output current vs. ambient temperature and air velocity (Either Orientation) 6 DESIGN CONSIDERATION 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 5A 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. 8 7 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). 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 = 511 − 6.11[ΚΩ ] ∆% Ex. When trim-down –10% (3.3V X 0.9 = 2.97V) 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. Rtrim − down = 511 − 6.11 = 44.99[ΚΩ ] 10 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. Figure 16: Circuit configuration for trim-up (increase output voltage) 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 overtemperature condition still exists during restart, the module will shut down again. This restart trial will continue until the temperature is within specification. 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 = Ex. When trim-up +10% (3.3V X 1.1 = 3.63V) 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. 5.11 * Vo * ( 100 + ∆%) 511 − − 6.11[ΚΩ ] 1.225 * ∆% ∆% Rtrim − up = 5.11* 3.3 * ( 100 + 10 ) 511 − − 6.11 = 94.21[ΚΩ ] 1.225 * 10 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) 9 THERMAL CONSIDERATIONS FEATURES DESCRIPTIONS (CONTINUED) 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. 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 17: Circuit configuration for remote ON/OFF 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”). 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 highest hot spot temperature is +120°C. 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. 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 18: Wind tunnel test setup 10 MECHANICAL DRAWING Pin No. 1 2 3 6 7 8 10 11 12 Name +Vout -Vout NC Trim NC ON/OFF NC -Vin +Vin Function Positive output voltage Negative output voltage No Connection Output voltage trim No Connection ON/OFF Logic No Connection Negative input voltage Positive input voltage 11 PART NUMBERING SYSTEM S Form Factor S- Small Power 36 S Input Number of Voltage Outputs 18~60V S- Single A Product Series 3R3 Output Voltage 08 Output Current N ON/OFF Logic R Pin Type A- Advanced 3R3- 3.3V 08- 8.0A N- Negative P- Positive R- SMD F A Option Code Space-RoHS 5/6 A- Standard F- RoHS 6/6 (Lead Free) MODEL LIST MODEL NAME S36SA3R308NRFA INPUT 18V~60V OUTPUT 2.1A 3.3V EFF @ 100% LOAD 8.0A 88.5% 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. 12 14