FEATURES High efficiency:90%@ ±12V/2.7A Size: 57.9mm x 36.8mm x 8.5mm (2.28”×1.45”×0.33”) Industry standard pin out Fixed frequency operation Input UVLO, Output OCP, OVP, OTP 1500V isolation Basic insulation No minimum load required Adjustable output voltage 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 Q48DB, 65W Quarter Brick Dual Output DC/DC Power Modules: 48V in, ±12V, 2.7A Output The Delphi Series Q48DB Quarter Brick, 48V input, positive and negative bipolar dual output, and 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 positive and negative bipolar output (output voltage is 12V) and up to 65 watts of power in an industry standard quarter brick package size. Both output channels can be used independently. 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 fully protected from abnormal input/output voltage, current, and temperature conditions. The Delphi Series converters meet all safety requirements with basic insulation. OPTIONS Positive On/Off logic Short pin lengths available APPLICATIONS Telecom/DataCom Wireless Networks Optical Network Equipment Server and Data Storage Industrial/Test Equipment DATASHEET DS_ Q48DB12003_04182006 TECHNICAL SPECIFICATIONS (TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.) PARAMETER NOTES and CONDITIONS Q48DB12003NRFA Min. ABSOLUTE MAXIMUM RATINGS Input Voltage Continuous Transient 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 Cross Regulation 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 Cross dynamic Settling Time (within 1% Vout nominal) Turn-On Transient Delay Time, From On/Off Control Delay Time, From Input 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 Leakage Current Output Voltage Trim Range Output Voltage Remote Sense Range Output Over-Voltage Protection GENERAL SPECIFICATIONS MTBF Weight Over-Temperature Shutdown DS_Q48DB12003_04182006 100ms Refer to Figure 20 for measuring point Typ. -40 -55 1500 Vdc Vdc °C °C Vdc 75 Vdc 33 31 1 34 32 2 35 33 3 2.4 200 10 Vdc Vdc Vdc A mA mA A2s mA dB P-P thru 12µH inductor, 5Hz to 20MHz 120Hz lo1or lo2=lo, min to lo, max | Io1-Io2| <20% Io,max 80 100 123 125 48 100 5 0.01 10 66 Vout 1,2 Units 36 100% Load, 36Vin Vin=48V, lo=lo. Max, Tc=25℃ Max. 20 ±12.10 ±12.20 V Vout 1,2 120 180 mV Vin=36V to 75V,Io1=Io2=full load Vout 1,2 Worse Case Tc=-40℃ to 115℃ Over all load, line and temperature 5Hz to 20MHz bandwidth Io1, Io2 Full Load, 1µF ceramic, 10µF Vout 1, 2 tantalum Io1, Io2 Full Load, 1µF ceramic, 10µF Vout 1, 2 tantalum Vout 1, 2 Lout 1＋ lout 2 60 100 100 120 220 200 ±12.500 mV mV mV mV 50 80 mV 50 mV 2.7 150 A % ±12.00 ±11.700 25 0 115 48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs Vout 1 Iout1 or Iout2 from50% Io, max to 75% Io, max Vout 2 200 400 200 400 Vout 1 200 400 Vout 2 200 400 Iout2 or Iout1 from 75% Io, max to 50% Io, max <1 minute 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 Pout ≦ max rated power Pout ≦ max rated power Over full temp range; %of nominal Vout us 10 10 10 10 ms ms ms ms µF 5000 90 88 % % 1800 Vdc MΩ pF 300 kHz 1500 10 0 - 10 0.8 18 1 300 +10 V V mA uA % 115 122 145 % 25 2.09 27.7 130 30 M hours grams °C Io=80% of Io, max; Ta=40°C Refer to hot spot temperature mV 100 Full load; 5% overshoot of Vout at startup Iout1, Iout2 full load Iout1, Iout2 60% of full load mV 2 ELECTRICAL CHARACTERISTICS CURVES 9.5 86 8.8 82 8.0 POWER DISSIPATION (W) EFFICIENCY (%) 90 78 36Vin 74 48Vin 70 66 62 75Vin 48Vin 7.3 36Vin 6.5 5.8 5.0 58 4.3 54 50 0.3 75Vin 3.5 0.7 1.0 1.4 1.7 2.0 2.4 2.7 OUTPUT CURRENT(A) Figure 1: Figure 1: Efficiency vs. load current for minimum, nominal, and maximum input voltage at 25°C. IO1=IO2 0.3 0.7 1.0 1.4 1.7 2.0 2.4 2.7 OUTPUT CURRENT(A) Figure 2: Power dissipation vs. load current for minimum, nominal, and maximum input voltage at 25°C. IO1=IO2 Figure 3: Typical input characteristics at room temperature (Io=full load) DS_Q48DB12003_04182006 3 ELECTRICAL CHARACTERISTICS CURVES Figure 4: Turn-on transient at zero load current (5ms/div). Vin=48V. Top Trace: Vout: 5V/div; Bottom Trace: ON/OFF input: 5V/div Figure 5: Turn-on transient at full rated load current (resistive load) (5 ms/div). Vin=48V. Top Trace: Vout; 5V/div; Bottom Trace: ON/OFF input: 5V/div Figure 6: Turn-on transient at zero load current (5ms/div). Vin=48V. Top Trace: Vout: 5V/div; Bottom Trace: ON/OFF input: 50V/div Figure 7: Turn-on transient at full rated load current (resistive load) (5 ms/div). Vin=48V. Top Trace: Vout; 5V/div; Bottom Trace: ON/OFF input: 50V/div DS_Q48DB12003_04182006 4 ELECTRICAL CHARACTERISTICS CURVES Figure 8: Output voltage response to step-change in load current Iout1 (75%-50%-75% of Io, max; di/dt = 0.1A/µs, 200uS/DIV)). Vin=48V. Load cap: 10µF, tantalum capacitor and 1µF ceramic capacitor. Top trace: Vout (100mV/div), Bottom trace: Iout (1A/div). Scope measurement should be made using a BNC cable (length short than 20 inch). Position the load between 51 mm and 76 mm (2inch and 3 inch) from the module DS_Q48DB12003_04182006 Figure 9: Output voltage response to step-change in load current Iout2 (75%-50%-75% of Io, max; di/dt = 0.1A/µs, 200uS/DIV). Vin=48V. Load cap: 10µF, tantalum capacitor and 1µF ceramic capacitor. Top trace: Vout (100mV/div), Bottom trace: Iout (1A/div). Scope measurement should be made using a BNC cable (length short than 20 inch). Position the load between 51 mm and 76 mm (2inch and 3 inch) from the module. 5 ELECTRICAL CHARACTERISTICS CURVES 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 full rated output current and nominal input voltage with 12µH source impedance and 33µF electrolytic capacitor (200 mA/div). Figure 12: Input reflected ripple current, is, through a 12µH source inductor at nominal input voltage and rated load current (20 mA/div). DS_Q48DB12003_04182006 6 ELECTRICAL CHARACTERISTICS CURVES CopperStrip Vo(+) 10u SCOPE 1u RESISTIV LOAD Vo(-) Figure 13: Output voltage noise and ripple measurement test setup Figure 14: Output voltage ripple at nominal input voltage (Vin=48V) and rated load current (Io1=Io2=2.7A) (20 mV/div). Load capacitance: 1µF ceramic capacitor and 10µF tantalum capacitor. Bandwidth: 20 MHz. (See Figure 12). Scope measurement should be made using a BNC cable (length short than 20 inch). Position the load between 51 mm and 76 mm (2inch and 3 inch) from the module. 13.0 12.0 11.0 OUTPUT VOLTAGE (V) 10.0 9.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 Vin=48V 0.0 0 1 2 3 4 5 6 7 8 LOAD CURRENT (A) Figure 15: Output voltage vs. load current showing typical current limit curves and converter shutdown points. DS_Q48DB12003_04182006 7 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. Safety Considerations The power module must be installed in compliance with the spacing and separation requirements of the end-user’s safety agency standard, i.e., UL60950, CAN/CSA-C22.2 No. 60950-00 and EN60950:2000 and IEC60950-1999, if the system in which the power module is to be used must meet safety agency requirements. Do not ground one of the input pins without grounding one of the output pins. This connection may allow a non-SELV voltage to appear between the output pin and ground. The power module has extra-low voltage (ELV) outputs when all inputs are ELV. 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 7A 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. When the input source is 60 Vdc 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. If the metal baseplate is grounded the output must be also grounded. 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. DS_Q48DB12003_04182006 8 FEATURES DESCRIPTIONS Vo(+) Vi(+) 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. TRIM ON/OFF RTN Vi(-) Vo(-) Figure 16: Remote on/off implementation 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. 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. 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. DS_Q48DB12003_04182006 9 FEATURES DESCRIPTIONS (CON.) 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. If the external resistor is connected between the TRIM and Rtn the output voltage set point increases (Fig.18). The external resistor value required to obtain a percentage output voltage change △% is defined as: Rtrim − up = Vo(+) Trim Rtn Rtrim-down RLoad 5.11 × Vo × (100 + ∆ ) 511 − − 10 .2(K Ω ) 1.225 × ∆ ∆ Ex. When Trim-up +10%(12 V×1.1=13.2V) 5.11 × 12 × (100 + 10) 511 Rtrim − up = − − 10.2 = 489(KΩ ) 1.225 × 10 10 When using trim, the output voltage of the module is usually increased, which increases the power output of the module with the same output current. Vo(-) Figure 17: Circuit configuration for trim-down (decrease output voltage) Care should be taken to ensure that the maximum output power of the module remains at or below the maximum rated power. If the external resistor is connected between the TRIM and Vo(-) pins, the output voltage set point decreases (Fig.17). The external resistor value required to obtain a percentage of output voltage change △% is defined as: ⎡ 511 ⎤ Rtrim − down = ⎢ − 10 .2 ⎥ (K Ω ) ⎣ ∆ ⎦ Ex. When Trim-down -10%(12V×0.9=10.8V) ⎡ 511 ⎤ Rtrim − down = ⎢ − 10 .2 ⎥ (K Ω ) = 40 .9 (K Ω ) 10 ⎣ ⎦ Vo(+) Trim Rtrim-up RLoad Rtn Vo(-) Figure 18: Circuit configuration for trim-up (increase output voltage) DS_Q48DB12003_04182006 10 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 is constantly kept at 6.35mm (0.25’’). Figure 20: Temperature measurement location * The allowed maximum hot spot temperature is defined at 123℃. 3.0 Output Current(A) Q48DB12003(Standard) Output Current vs. Ambient Temperature and Air Velocity @Vin = 48V (Transverse Orientation) 600LFM 2.5 500LFM Natural Convection 2.0 400LFM Thermal Derating 100LFM 1.5 Heat can be removed by increasing airflow over the module. The module’s maximum case temperature is +123°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. 200LFM 1.0 300LFM 0.5 0.0 PWB FACING PWB MODULE AIR VELOCITY AND AMBIENT TEMPERATURE MEASURED BELOW THE MODULE 55 60 65 70 75 80 85 90 95 100 105 110 Ambient Temperature (℃) Figure 21: Output current vs. ambient temperature and air velocity @Vin = 48V(Transverse Orientation) 50.8 (2.0”) AIR FLOW 12.7 (0.5”) Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches Figure 19: Wind Tunnel Test Setup DS_Q48DB12003_04182006 11 MECHANICAL DRAWING Pin No. Name Function 1 2 3 4 5 6 7 8 +Vin NC ON/OFF -Vin -Vout RTN Trim +Vout Positive input voltage No connection Remote ON/OFF Negative input voltage Negative output voltage Output Return Output voltage trim Positive output voltage DS_Q48DB12003_04182006 12 PART NUMBERING SYSTEM Q 48 D B 120 03 N R Product Type Input Voltage Number of Outputs Product Series Output Voltage Output Current ON/OFF Logic Pin Length Q - Quarter Brick 48V D - Dual output B - Bipolar dual 120 - 12.0V 03 - 2.7A N - Negative P - Positive F A Option Code R - 0.150” F- RoHS 6/6 N - 0.145” (Lead Free) K - 0.110” A - Standard functions MODEL LIST MODEL NAME Q48DB12003NRFA INPUT 36V~75V OUTPUT 2.4A ± 12V EFF @ Full Load 2.7A each 90% 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. DS_Q48DB12003_04182006 13