FEATURES High efficiency 91.0% @ 52V/1.15A Size: 57.9x36.8x9.8mm (2.28"x1.45"x0.39") Standard footprint Industry standard pin out Fixed frequency operation Input UVLO, Output OCP, OVP, OTP 2250V isolation and basic insulation No minimum load required ISO 9001, TL 9000, ISO 14001, QS9000, OHSAS18001 certified manufacturing facility UL/cUL 60950-1 (US & Canada), and CE - pending Delphi Series Q48SA, 60W Quarter Brick Family DC/DC Power Modules: 36~75V in, 52V/1.15A out The Delphi Q48SA52001 series, quarter brick, 36~75V input, single output, isolated DC/DC converter is the latest offering from a world leader in power system and technology and manufacturing Delta Electronics, Inc. The Q48SA52001 product family operates from a wide 36~75V input voltage range and provides up to 60 watts of power in an industry standard footprint and pinout. With creative design technology and optimization of component placement, these converters possess outstanding electrical and thermal performances, 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. PRELIMINARY DATASHEET DS_Q48SA52001_05142009 OPTIONS Positive, negative, or no On/Off OTP and Output OVP, OCP mode, Auto-restart or latch-up Short pin lengths APPLICATIONS Telecom / Datacom Wireless Networks Optical Network Equipment Server and Data Storage Industrial / Testing Equipment TECHNICAL SPECIFICATIONS (TA=25C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted; PARAMETER NOTES and CONDITIONS Q48SA52001 (Standard) Min. ABSOLUTE MAXIMUM RATINGS Input Voltage Continuous Transient (100ms) Operating Case 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 External Output Capacitance EFFICIENCY 100% Load 60% Load ISOLATION CHARACTERISTICS Input to Output Isolation Resistance Isolation Capacitance FEATURE CHARACTERISTICS Switching Frequency ON/OFF Control, Negative Remote On/Off logic Logic Low (Module On) Logic High (Module Off) ON/OFF Control, Positive Remote On/Off logic Logic Low (Module Off) Logic High (Module On) ON/OFF Current (for both remote on/off logic) Leakage Current (for both remote on/off logic) Output Over-Voltage Protection(latch mode) GENERAL SPECIFICATIONS MTBF Weight Over-Temperature Shutdown DS_Q48SA52001_05142009 100ms Please refer to Figure 19 Typ. -40 -55 1 minute 36 48 32 29 2 100% Load, 36Vin Vin=48V 50 8 P-P thru 12H inductor, 5Hz to 20MHz 120 Hz 10 50 Max. Units 80 100 120 125 2250 Vdc Vdc C C Vdc 75 Vdc 35 32 4 2.4 Vdc Vdc Vdc A mA mA A2s mA dB 1 Vin=48V, Io=Io.max, Tc=25C Io=Io,min to Io,max Vin=36V to 75V Tc=-40C to 120C over load, line and temperature 5Hz to 20MHz bandwidth, with external output capacitors Full Load (high frequency low ESR) Output Voltage 10% Low 51.0 53.0 +20 +20 +200 +200 0.02 53.6 mV mV %Vo/C V 500 50 700 150 1.15 1.65 mV mV A A 50.4 0 1.27 48V, 10F electrolytic & 1F ceramic load cap, 0.1A/s 50% to 75% Io.max 75% to 50% Io.max 750 750 25 25 Full load; 5% overshoot of Vout at startup 10 Vin=48V Vin=48V Vdc 52.0 mV mV s 100 100 1000 91.0 90.0 ms ms F % % 2250 2000 Vdc M pF 330 kHz 10 Von/off at Ion/off=1.0mA Von/off at Ion/off=0.0 A 0 3.5 1.2 20 V V 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 Over full temp range; 0 3.5 1.2 20 1.0 55 60 V V mA A V Io=80% of Io, max; Tc=40C Please refer to Figure 19 TBD 27.8 125 M hours grams C 2 ELECTRICAL CHARACTERISTICS CURVES 8 100 95 7 80 POWER DISSIPATION (W) 1 85 EFFICIENCY (%) 90 75 70 75Vin 48Vin 65 36Vin 60 6 5 4 3 75Vin 2 48Vin 1 55 50 36Vin 0 10 20 30 40 50 60 70 80 90 100 10 20 30 40 50 60 70 80 90 100 OUTPUT CURRENT(A%) 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. 2.4 INPUT CURRENT (A) 1 2.1 1.8 1.5 1.2 0.9 0.6 0.3 0.0 25 30 35 40 45 50 55 60 65 70 75 INPUT VOLTAGE (V) Figure 3: Typical full load input characteristics at room temperature. DS_Q48SA52001_05142009 3 ELECTRICAL CHARACTERISTICS CURVES For Negative Remote On/Off Logic Figure 4: Turn-on transient at full rated load current (5ms/div). Top Trace: Vout; 10V/div; Bottom Trace: ON/OFF input: 5V/div. Figure 5: Turn-on transient at zero load current (5 ms/div). Top Trace: Vout: 10V/div; Bottom Trace: ON/OFF input: 5V/div. For Input Voltage Start up Figure 6:Turn-on transient at full rated load current (5 ms/div). Top Trace: Vout; 10V/div; Bottom Trace: input voltage: 50V/div. DS_Q48SA52001_05142009 Figure 7: Turn-on transient at zero load current (5 ms/div). Top Trace: Vout; 10V/div; Bottom Trace: input voltage: 50V/div. 4 ELECTRICAL CHARACTERISTICS CURVES Figure 8: Output voltage response to step-change in load current (75%-50%-75% of Io, max; di/dt = 0.1A/s). Load cap: 10F aluminum capacitor and 1F ceramic capacitor. TOP Trace: Vout (500mV/div), Bottom Trace: Iout (500mA/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 9: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 12H source impedance and 33F electrolytic capacitor (500 mA/div2us/div). 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 H. Capacitor Cs offset possible battery impedance. Measure current as shown above. DS_Q48SA52001_05142009 5 ELECTRICAL CHARACTERISTICS CURVES Figure 11: Input reflected ripple current, is, through a 12H source inductor at nominal input voltage and rated load current (20 mA/div2us/div). Figure 12: Output voltage noise and ripple measurement test setup. 60 OUTPUT VOLTAGE(V) 1 54 48 42 36 30 24 18 12 6 0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 LOAD CURRENT(A) Figure 13: Output voltage ripple at nominal input voltage and rated load current (Io=1.15A)(50 mV/div, 2us/div) Load capacitance: 1F ceramic capacitor and 10F electrolytic capacitor. Bandwidth: 20MHz. Scope measurements 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_Q48SA52001_05142009 Figure 14: Output voltage vs. load current showing typical current limit curves and converter shutdown points. 6 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 10F to 100F 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. 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., UL60950-1, CAN/CSA-C22.2, No. 60950-1, if the system in which the power module is to be used must meet safety agency requirements. Basic insulation based on 75 Vdc input is provided between the input and output of the module for the purpose of applying insulation requirements when the input to this DC-to-DC converter is identified as TNV-2 or SELV. An additional evaluation is needed if the source is other than TNV-2 or SELV. When the input source is SELV circuit, 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: DS_Q48SA52001_05142009 The input source must be insulated from the ac mains by reinforced or double insulation. The input terminals of the module are not operator accessible. If the metal baseplate / heatspreader is grounded the output must be also grounded. A SELV reliability test is conducted on the system where the module is used, in combination with the module, to ensure that under a single fault, hazardous voltage does not appear at the module's output. When installed into a Class II equipment (without grounding), spacing consideration should be given to the end-use installation, as the spacing between the module and mounting surface have not been evaluated. 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 20A 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. 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). 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. 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 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. Also, an option of hiccup mode for OVP is available. Under hiccup mode, the modules will try to restart after shutdown. If the over voltage condition still exists, the module will shut down again. This restart trial will continue until the over voltage condition is corrected. Figure 15: Remote on/off implementation 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 Vo(+) or Vo(-).The TRIM pin should be left open if this feature is not used. 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. Figure 16: Circuit configuration for trim-up (increase output voltage) If the external resistor is connected between the TRIM and Vo(-) pin, the output voltage set point increases (Fig. 17). The external resistor value required value required to obtain output voltage change U is defined as: Rtrim -up = Ex. When Trim-up 5%U is 5%*Vnormal=0.05*52.5=2.625 Rtrim -up = DS_Q48SA52001_05142009 127.5 - 4 .7 ( K ) U 127.5 - 4.7 = 43.87 K 2.625 8 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. Figure 17: Circuit configuration for trim-down (decrease output voltage) If the external resistor is connected between the TRIM and Vo(+), Vout decreases (Fig. 18). The external resistor value required to obtain output voltage change U is defined as: Rtrim - down = 51 * 51 - 55.7( K) U Ex. When Trim-down 15%U is 15%*Vnormal=0.15*52.5=7.875 Rtrim -down = 51 * 51 - 55.7 = 274.6( K) 7.875 When using trim-up, 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 of the module remains at or below the maximum rated power. 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''). PWB FACING PWB MODULE AIR VELOCITY AND AMBIENT TEMPERATURE MEASURED BELOW THE MODULE 50.8 (2.0") AIR FLOW 12.7 (0.5") Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches) Figure 18: Wind tunnel test setup Thermal Derating Heat can be removed by increasing airflow over the module. 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_Q48SA52001_05142009 9 THERMAL CURVES Output Power (W) Q48SA52001 (standard) Output Current vs. Ambient Temperature and Air Velocity @Vin=48V (Transverse Orientation) 60 50 Natural Convection 40 100LFM 30 20 10 0 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature () Figure 19: Temperature measurement location * The allowed maximum hot spot temperature is defined at 120 DS_Q48SA52001_05142009 Figure 20: Output current vs. ambient temperature and air velocity @Vin=48V(Transverse Orientation) 10 MECHANICAL DRAWING Pin No. 1 2 3 4 5 6 Name Function +Vin ON/OFF -Vin -Vout Trim +Vout Positive input voltage Remote ON/OFF Negative input voltage Negative output voltage Output voltage trim Positive output voltage Pin Specification: Pins 1-6 1.00mm (0.040") diameter All pins are copper with Tin plating. DS_Q48SA52001_05142009 11 PART NUMBERING SYSTEM Q 48 S A 520 01 N N A Form Input Number of Product Output Output ON/OFF Pin Option Code Factor Voltage Outputs Series Voltage Current Logic Length S - Single A - Advanced 520 - 52V 01- 1.15A N - Negative R - 0.170" Q - Quarter Brick 48 36~75V N - 0.145" Space- RoHs 5/6 A - Open Frame F- RoHS 6/6 (Lead Free) MODEL LIST MODEL NAME Q48SA52001NNFA INPUT 36V~75V OUTPUT 2.4 A 52V EFF @ 100% LOAD 1.15A 91% * For modules with through-hole pins and the optional heatspreader, they are intended for wave soldering assembly onto system boards; please do not subject such modules through reflow temperature profile. 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 6220~6224 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. DS_Q48SA52001_05142009 12 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Delta Electronics: Q48SA52001NNFA Q48SA54001NNFH