FEATURES High Efficiency: 93.0% @ 12Vin, 5.0V/3A out Small size and low profile: 0.80” x 0.45” x 0.27” (SMD) 0.90” x 0.40” x 0.25” (SIP) Standard footprint and pinout Resistor-based trim Output voltage programmable from 0.75Vdc to 5.5Vdc via external resistors Pre-bias startup No minimum load required Fixed frequency operation Input UVLO, OCP Remote ON/OFF ISO 9001, TL 9000, ISO 14001, QS9000, OHSAS18001 certified manufacturing facility UL/cUL 60950 (US & Canada) Recognized, and TUV (EN60950) - pending CE mark meets 73/23/EEC and 93/68/EEC pending Delphi series DNT12 Non-Isolated Point of Load DC/DC Power Modules: 8.3~14Vin, 0.75~5.5Vo, 3A OPTIONS The Delphi series DNT12, 8.3V~14V input, 3A single output, non-isolated Positive on/off logic point of load DC/DC converters are the latest offering from a world leader SIP package in power systems technology and manufacturing -- Delta Electronics, Inc. The DNT12, 3A series provides a programmable output voltage from 0.75V to 5.5V using external resistors. This product family is available in a surface mount or SIP package and provides up to 3A of current in an industry standard footprint. With creative design technology and optimization of component placement, these converters possess outstanding electrical and thermal performance and extremely high APPLICATIONS reliability under highly stressful operating conditions. The DNT12, 3A Telecom/DataCom Distributed power architectures Servers and workstations LAN/WAN applications Data processing applications modules have excellent thermal performance and can provide full output current at up to 85℃ ambient temperature with no airflow. DATASHEET DS_DNT12SMD03_07182012 TECHNICAL SPECIFICATIONS (TA = 25°C, airflow rate = 300 LFM, Vin = 12Vdc, nominal Vout unless otherwise noted.) PARAMETER NOTES and CONDITIONS DNT12S0A0S03NFA Min. ABSOLUTE MAXIMUM RATINGS Input Voltage (Continuous) Operating Temperature Storage Temperature INPUT CHARACTERISTICS Operating Input Voltage Input Under-Voltage Lockout Turn-On Voltage Threshold Turn-Off Voltage Threshold Maximum Input Current No-Load Input Current Off Converter Input Current Inrush Transient Recommended Input Fuse OUTPUT CHARACTERISTICS Output Voltage Set Point Output Voltage Adjustable Range Output Voltage Regulation Over Line Over Load Over Temperature Total Output Voltage Range Output Voltage Ripple and Noise Peak-to-Peak RMS Output Current Range Output Voltage Over-shoot at Start-up Output DC Current-Limit Inception Output Short-Circuit Current (Hiccup mode) DYNAMIC CHARACTERISTICS Dynamic Load Response Positive Step Change in Output Current Negative Step Change in Output Current Setting Time to 10% of Peak Devitation Turn-On Transient Start-Up Time, From On/Off Control Start-Up Time, From Input Maximum Output Startup Capacitive Load EFFICIENCY Vo=0.75V Vo=1.2V Vo=1.5V Vo=1.8V Vo=2.5V Vo=3.3V Vo=5.0V FEATURE CHARACTERISTICS Switching Frequency ON/OFF Control, (for Negative logic) Logic Low Voltage Logic High Voltage Logic Low Current Logic High Current ON/OFF Control, (for Positive logic) Logic High Voltage Logic Low Voltage Logic High Current Logic Low Current GENERAL SPECIFICATIONS MTBF Weight Typ. 0 -40 -55 8.3 12 Max. Units 15 85 125 Vdc °C °C 14 V 7.90 9 7.70 Vin=8.3V, Vo=5V, Io=3A Vo=5V 50 2 Vin= Vin,min to Vin,max, Io=Io,min to Io,max 2.2 70 10 0.4 TBD Vin=12V, Io=Io,max Vin=Vin,min to Vin,max Io=Io,min to Io,max Ta= -40℃ to 85℃ Over sample load, line and temperature 5Hz to 20MHz bandwidth Vin=min to max, Io=min to max,1µF ceramic, 10µF Tan Vin=min to max, Io=min to max,1µF ceramic, 10µF Tan -2.0 0.7525 Vo,set 50 20 Io,s/c 10µF Tan & 1µF ceramic load cap, 2.5A/µs 50% Io, max to 100% Io, max 100% Io, max to 50% Io, max Io=Io.max Von/off, Vo=10% of Vo,set Vin=Vin,min, Vo=10% of Vo,set Full load; ESR ≧1mΩ Full load; ESR ≧10mΩ Io=Io,max, Ta=25℃ +3.0 % Vo,set % Vo,set % Vo,set % Vo,set 200 1.5 200 200 25 mVpk mVpk µs 7 7 Vin=12V, Io=Io,max Vin=12V, Io=Io,max Vin=12V, Io=Io,max Vin=12V, Io=Io,max Vin=12V, Io=Io,max Vin=12V, Io=Io,max Vin=12V, Io=Io,max Module On, Von/off Module Off, Von/off Module On, Ion/off Module Off, Ion/off % Vo,set V mV mV A % Vo,set % Io Adc (rms) 0 Module On, Von/off Module Off, Von/off Module On, Ion/off Module Off, Ion/off +2.0 5.5 0.3 0.4 0.4 -3.0 V V A mA mA 2 AS A 80 30 3 1 10 10 1000 3000 ms ms µF µF 72.0 80.0 83.0 85.0 88.0 90.0 93.0 % % % % % % % 300 kHz -0.2 2.5 0.2 0.3 Vin,max 10 1 V V uA mA 0.2 Vin,max 0.3 10 1 V V uA mA -0.2 38.29 2.3 M hours grams DS_DNT12SMD03_07182012 2 96 93 90 87 84 81 78 75 72 Efficiency (%) Efficiency (%) ELECTRICAL CHARACTERISTICS CURVES 0.5 1 1.5 2 2.5 95 92 89 86 83 80 77 74 71 0.5 3 1 Figure 1: Converter efficiency vs. output current Efficiency (%) Efficiency(%) 2 2.5 88 86 84 82 80 78 76 74 72 3 0.5 1 Output Current (A) 1.5 2 2.5 3 Output Current (A) Figure 3: Converter efficiency vs. output current (12V in, 2.5V output voltage) Figure 4: Converter efficiency vs. output current (12V in, 1.8V output voltage) 84 88 86 84 82 80 78 76 74 72 82 Efficiency (%) Efficiency (%) 3 (12V in, 3.3V output voltage) 90 88 86 84 82 80 78 76 74 1.5 2.5 Figure 2: Converter efficiency vs. output current (12V in, 5V output voltage) 1 2 Output Current (A) Output Current (A) 0.5 1.5 80 78 76 74 72 70 0.5 1.0 1.5 2.0 2.5 Output Current (A) Figure 5: Converter efficiency vs. output current (12V in, 1.5V output voltage) 3.0 0.5 1 1.5 2 2.5 3 Output Current (A) Figure 6: Converter efficiency vs. output current (12V in, 1.2V output voltage) DS_DNT12SMD03_07182012 3 ELECTRICAL CHARACTERISTICS CURVES Figure 7: Output ripple & noise at 12Vin, 5.0V/3A out pk-pk :45.8mV, rms :17.8mV (50mV/div,2uS/div) Figure 8: Output ripple & noise at 12Vin, 3.3V/3A out pk-pk :37.5mV, rms :11.6mV (50mV/div,2uS/div) Figure 9: Output ripple & noise at 12Vin, 2.5V/3A out pk-pk:33.3mV, rms:9.4mV (50mV/div, 2uS/div) Figure 10: Output ripple & noise at 12Vin, 1.2V/3A out pk-pk: 18.7mV, rms: 3.9mV (50mV/div, 2uS/div) Figure 11: Turn on delay time at 12Vin, 5.0V/3A out (5mS/div) Top trace: Vout, 5V/div; Bottom trace: Vin, 10V/div Figure 12: Turn on delay time at Remote On/Off, 5.0V/3A out (5mS/div). Top trace: Vout, 5V/div; Bottom trace: On/Off, 5.0V/div. DS_DNT12SMD03_07182012 4 ELECTRICAL CHARACTERISTICS CURVES Figure 13: Turn on Using Remote On/Off with external capacitors (Co= 3000 µF), 5.0V/3A out (resistive load) (5mS/div) Top trace: Vout, 5V/div; Bottom trace: Vin , 10V/div Figure 14: Turn on Using Input On/Off with external capacitors (Co= 3000 µF), 5.0V/3A out (resistive load) (5mS/div) Top trace: Vout, 5V/div; Bottom trace: On/Off, 5V/div Figure 15: Typical transient response to step load change at 2.5A/μS from 100% to 50% of Io, max at 12Vin, 5.0V out (Cout = 1uF ceramic, 10μF tantalum) (200mV/div, 20uS/div) Figure 16: Typical transient response to step load change at 2.5A/μS from 50% to 100% of Io, max at 12Vin, 5.0V out (Cout = 1uF ceramic, 10μF tantalum) (200mV/div, 20uS/div) Figure 17: Output short circuit current 12Vin, 0.75Vout (10A/div, 50mS/div) Figure 18: Turn on with Prebias 12Vin, 1.8V/0A out, Vbias =1.0Vdc (5mS/div) Top trace: Vout, 1V/div; Bottom trace: Vin, 10V/div DS_DNT12SMD03_07182012 5 TEST CONFIGURATIONS DESIGN CONSIDERATIONS Input Source Impedance TO OSCILLOSCOPE L VI(+) 2 100uF Tantalum BATTERY VI(-) Note: Input reflected-ripple current is measured with a simulated source inductance. Current is measured at the input of the module. Figure 19: Input reflected-ripple test setup COPPER STRIP Vo To maintain low-noise and ripple at the input voltage, it is critical to use low ESR capacitors at the input to the module. The input capacitance should be able to handle an AC ripple current of at least: Irms Iout Vout Vout 1 Vin Vin Arms The power module should be connected to a low ac-impedance input source. Highly inductive source impedances can affect the stability of the module. An input capacitance must be placed close to the modules input pins to filter ripple current and ensure module stability in the presence of inductive traces that supply the input voltage to the module. Safety Considerations 1uF 10uF SCOPE tantalum ceramic Resistive Load GND Note: Use a 10μF tantalum and 1μF capacitor. Scope measurement should be made using a BNC connector. Figure 20: Peak-peak output noise and startup transient measurement test setup CONTACT AND DISTRIBUTION LOSSES VI Vo I For safety-agency approval the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standards. For the converter output to be considered meeting the requirements of safety extra-low voltage (SELV), the input must meet SELV requirements. The power module has extra-low voltage (ELV) outputs when all inputs are ELV. The input to these units is to be provided with a maximum (TBD) A of glass type fast-acting fuse in the ungrounded lead. Io LOAD SUPPLY GND CONTACT RESISTANCE Figure 21: Output voltage and efficiency measurement test setup Note: All measurements are taken at the module terminals. When the module is not soldered (via socket), place Kelvin connections at module terminals to avoid measurement errors due to contact resistance. ( Vo Io ) 100 % Vi Ii DS_DNT12SMD03_07182012 6 FEATURES DESCRIPTIONS FEATURES DESCRIPTIONS (CON.) Remote On/Off The DNT series power modules have an On/Off pin for remote On/Off operation. Both positive and negative On/Off logic options are available in the DNT series power modules. For positive logic module, connect an open collector (NPN) transistor or open drain (N channel) MOSFET between the On/Off pin and the GND pin (see figure 22). Positive logic On/Off signal turns the module ON during the logic high and turns the module OFF during the logic low. When the positive On/Off function is not used, leave the pin floating or tie to Vin (module will be On). For negative logic module, the On/Off pin is pulled high with an external pull-up resistor (see figure 23) Negative logic On/Off signal turns the module OFF during logic high and turns the module ON during logic low. If the negative On/Off function is not used, leave the pin floating or tie to GND. (module will be On) The output voltage of the DNT can be programmed to any voltage between 0.75Vdc and 5.5Vdc by connecting one resistor (shown as Rtrim in Figure 25) between the TRIM and GND pins of the module. Without this external resistor, the output voltage of the module is 0.7525 Vdc. To calculate the value of the resistor Rtrim for a particular output voltage Vo, please use the following equation: 10500 1000 Vo 0.7525 Rtrim Rtrim is the external resistor in Ω Vo is the desired output voltage For example, to program the output voltage of the DNT module to 3.3Vdc, Rtrim is calculated as follows: 10500 1000 2.5475 Rtrim Vo Vin Output Voltage Programming ION/OFF RL On/Off GND Figure 22: Positive remote On/Off implementation DNT can also be programmed by applying a voltage between the TRIM and GND pins (Figure 26). The following equation can be used to determine the value of Vtrim needed for a desired output voltage Vo: Vtrim 0.7 Vo 0.7525 0.0667 Vo Vin Rtrim = 3.122 kΩ Rpull-up ION/OFF On/Off RL Vtrim is the external voltage in V Vo is the desired output voltage GND For example, to program the output voltage of a DNT module to 3.3 Vdc, Vtrim is calculated as follows Figure 23: Negative remote On/Off implementation Vtrim 0.7 2.5475 0.0667 Over-Current Protection To provide protection in an output over load fault condition, the unit is equipped with internal over-current protection. When the over-current protection is triggered, the unit enters hiccup mode. The units operate normally once the fault condition is removed. DS_DNT12SMD03_07182012 7 FEATURE DESCRIPTIONS (CON.) FEATURE DESCRIPTIONS (CON.) The amount of power delivered by the module is the PS1 voltage at the outputPS1 terminals multiplied by the output current. When using the trim feature, the output voltage +△V PS2 PS2 of the module can be increased, which at the same output current would increase the power output of the module. Care should be taken to ensure that the maximum output power of the module must not exceed the maximum rated power (Vo.set x Io.max ≤ P max). Vtrim = 0.530V Voltage Margining Figure 24: Circuit configuration for programming output voltage using an external resistor Figure 25: Circuit Configuration for programming output voltage Output voltage margining can be implemented in the DNT modules by connecting a resistor, R margin-up, from the Trim pin to the ground pin for margining-up the output voltage and by connecting a resistor, R margin-down, from the Trim pin to the output pin for margining-down. Figure 26 shows the circuit configuration for output voltage margining. If unused, leave the trim pin unconnected. A calculation tool is available from the evaluation procedure, which computes the values of Rmargin-up and Rmargin-down for a specific output voltage and margin percentage. using external voltage source Table 1 provides Rtrim values required for some common output voltages, while Table 2 provides value of external voltage source, Vtrim, for the same common output voltages. By using a 1% tolerance trim resistor, set point tolerance of ±2% can be achieved as specified in the electrical specification. Vin Vo Rmargin-down Q1 On/Off Trim Rmargin-up Rtrim Q2 Table 1 VO (V) 0.7525 1.2 1.5 1.8 2.5 3.3 5.0 5.5 GND Rtrim (KΩ) Open 22.464 13.047 9.024 5.009 3.122 1.472 1.210 Figure 26: Circuit configuration for output voltage margining Table 2 VO (V) 0.7525 1.2 1.5 1.8 2.5 3.3 5.0 5.5 Vtrim (V) Open 0.670 0.650 0.630 0.583 0.530 0.4167 0.3840 DS_DNT12SMD03_07182012 8 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 height of this fan duct is constantly kept at 25.4mm (1’’). Figure 28: Temperature measurement location The allowed maximum hot spot temperature is defined at 125℃. DNT12S0A0S03(standard) Output Current vs. Ambient Temperature and Air Velocity @Vin = 12V,Vo=0.75V~5V (Either Orientation) Output Current (A) 3.5 3.0 Natural Convection 2.5 2.0 Thermal Derating 1.5 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. PWB FANCING PWB 1.0 0.5 0.0 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (℃) Figure 29:Output current vs. ambient temperature and air velocity@ Vin=12V, Vo=0.75V ~5.0V (Either Orientation) MODULE 50.8(2.00") AIR VELOCITY AND AMBIENT TEMPERATURE SURED BELOW THE MODULE AIR FLOW Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches) Figure 27: Wind tunnel test setup DS_DNT12SMD03_07182012 9 PICK AND PLACE LOCATION SURFACE- MOUNT TAPE & REEL LEAD (Sn/Pb) PROCESS RECOMMEND TEMP. PROFILE LEAD FREE (SAC) PROCESS RECOMMEND TEMP. PROFILE Temp. Peak Temp. 240 ~ 245 ℃ 220℃ Ramp down max. 4℃ /sec. 200℃ 150℃ Preheat time 90~120 sec. Time Limited 75 sec. above 220℃ Ramp up max. 3℃ /sec. 25℃ Time DS_DNT12SMD03_07182012 Note: All temperature refers to assembly application board, measured on the land of assembly application board. 10 MECHANICAL DRAWING SMD PACKAGE SIP PACKAGE (OPTIONAL) DS_DNT12SMD03_07182012 11 PART NUMBERING SYSTEM DNT 12 S 0A0 S Product Series Input Voltage Numbers of Outputs Output Voltage Package Type DNT - 3A or 04 - 2.4V ~ 5.5V 5A 12 - 8.3V ~ 14V S - Single 0A0 R - SIP Programmable S - SMD 03 N F A Output On/Off logic Current 03 - 3A 05 - 5A N- Negative P- Positive Option Code F- RoHS 6/6 (Lead Free) A - Standard Functions MODEL LIST Model Name Package Input Voltage Output Voltage Output Current Efficiency 12Vin, 5Vout full load DNT12S0A0S03NFA SMD 8.3V ~ 14Vdc 0.75V ~ 5.5Vdc 3A 93.0% 92.5% DNT12S0A0R03NFA SIP 8.3V ~ 14Vdc 0.75V ~ 5.5Vdc 3A DNT12S0A0S05NFA SMD 8.3V ~ 14Vdc 0.75V ~ 5.5Vdc 5A 92.0% DNT12S0A0R05NFA SIP 8.3V ~ 14Vdc 0.75V ~ 5.5Vdc 5A 91.0% CONTACT: www.deltaww.com/dcdc USA: Telephone: East Coast: 978-656-3993 West Coast: 510-668-5100 Fax: (978) 656 3964 Email: [email protected] Europe: Phone: +31-20-655-0967 Fax: +31-20-655-0999 Email: [email protected] Asia & the rest of world: Telephone: +886 3 4526107 ext 6220-6224 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 DS_DNT12SMD03_07182012 12