FEATURES High Efficiency: 92.5% @ 12Vin, 5V/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 5.0Vdc 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, Delphi series DNT12 Non-Isolated Point of Load DC/DC Power Modules: 8.3~14Vin, 0.75~5.0Vo, 3A OPTIONS The Delphi series DNT12, 8.3V~14V input, 3A single output, non-isolated point of load DC/DC converters are the latest offering from a world leader Negative on/off logic SMD package in power systems technology and manufacturing — Delta Electronics, Inc. The DNT12, 3A series provides a programmable output voltage from 0.75V to 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 and pinout. With creative design technology and optimization of component placement, these converters possess outstanding electrical and thermal performance and extremely high reliability under highly stressful operating conditions. The DNT12, 3A SIP APPLICATIONS Telecom/DataCom modules have excellent thermal performance and can provide full output Distributed power architectures current with little air flow. Servers and workstations LAN/WAN applications Data processing applications DATASHEET DS_DNT12SIP03_03292013 TECHNICAL SPECIFICATIONS (TA = 25°C, airflow rate = 300 LFM, Vin = 8.3Vdc and 14Vdc, nominal Vout unless otherwise noted.) PARAMETER NOTES and CONDITIONS DNT12S0A0R03NFA Min. ABSOLUTE MAXIMUM RATINGS Input Voltage 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 Deviation 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, (Negative logic) Logic Low Voltage Logic High Voltage Logic Low Current Logic High Current GENERAL SPECIFICATIONS MTBF Weight DS_DNT12SIP03_03292013 Typ. 0 -40 -55 8.3 12 Max. Units 15 85 125 Vdc °C °C 14 V 7.95 7.80 Vin=Vin,min to Vin,max, Io=Io,max Vo=5V 50 1 Vin= Vin,min to Vin,max, Io=Io,min to Io,max 2.2 70 5 0.4 TBD Vin=12V, Io=Io,max -1.5 0.7525 Vin=Vin,min to Vin,max Io=Io,min to Io,max Over sample load, line and temperature 5Hz to 20MHz bandwidth Vin=min to max, Io=min to max1µF ceramic, 10µF Tan Vin=min to max, Io=min to max1µF ceramic, 10µF Tan Vo,set 40 20 Io,s/c 47µF 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 +3.0 % Vo,set % % Vo,set % Vo,set 200 1.5 200 200 25 mVpk mVpk µs 8 8 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 Io=Io,max, Ta=25℃ % 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 +1.5 5.0 0.4 0.4 0.4 -3.0 V V A mA mA 2 AS A 70 25 3 5 15 15 1000 3000 ms ms µF µF 72.5 80.0 83.0 85.0 88.0 90.0 92.5 % % % % % % % 300 kHz -0.2 2.5 0.2 1 2.1 0.3 Vin,max 10 1 V V uA mA M hours grams 2 ELECTRICAL CHARACTERISTICS CURVES Figure 1: Converter efficiency vs. output current (12V in, 5V output voltage) Figure 2: Converter efficiency vs. output current (12V in, 3.3V output voltage) 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) Figure 5: Converter efficiency vs. output current (12V in, 1.5V output voltage) Figure 6: Converter efficiency vs. output current (12V in, 1.2V output voltage) DS_DNT12SIP03_03292013 3 ELECTRICAL CHARACTERISTICS CURVES Figure 7: Output ripple & noise at 12Vin, 1.2V3A out 20mV/div, pk-pk : 12.50mV, rms : 2.79mV(20mV/div,5uS/div) Figure 8: Output ripple & noise at 12Vin, 2.5V/3A out 50mV/ div , pk-pk :27.50mV, rms :7.67mV(50mv/div,5uS/div) Figure 9: Output ripple & noise at 12Vin, 3.3V/3A out 50mv/div, pk-pk :300.00mV, rms :11.9mV(50mV/div,5uS/div) Figure 10: Output ripple & noise at 12Vin, 5.0V/3A out pk-pk :44.16mV, rms :15.36mV (50mV/div,5uS/div) Figure 11: Turn on delay time at 12vin, 5.0V3A out (2mS/div) Top trace :Vout , 2V/ div ; Bottom trace :Vin ,20V/div DS_DNT12SIP03_03292013 Figure 12: Turn on delay time at Remote On/Off, 5.0V/3A out (2mS/div).Top trace: Vout ,2V/div ;Bottom trace :ON/off , 5V/div. 4 ELECTRICAL CHARACTERISTICS CURVES Figure 13: Turn on Using Input On/Off with external capacitors (Co=3000 µF), 5.0V/3A out (resistive load)(2mS/div) Top trace:Vout, 2V/div; Bottom trace: Vin ,10V/div Figure 14: Turn on Using Remote On/Off with external capacitors (Co= 3000 µF), 5.0V/3A out(resistive load)(2mS/div) Top trace: Vout,2V/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+ 47µF Ceramic)(100mV/div,50uS/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+ 47µF Ceramic)(100mV/div,50uS/div) Figure 17: Output short circuit current 12Vin, 0.75Vout (0.5V/div,50mS/div) Figure 18: Turn on with Prebias 12Vin, 5V/0A out, Vbias =3.3Vdc . (5mS/div) Top trace: Vout,2V/div; Bottom trace: Vin, 10V/div DS_DNT12SIP03_03292013 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. 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 Figure 19: Input reflected-ripple test setup 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. COPPER STRIP Vo 1uF 10uF SCOPE tantalum ceramic Resistive Load GND 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 adequate time-delay fuse in the ungrounded lead. 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 Io I 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. η =( Vo × Io ) × 100 % Vi × Ii DS_DNT12SIP03_03292013 6 DESIGN CONSIDERATIONS (CON.) FEATURES DESCRIPTIONS Remote On/Off Output Voltage Programming 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 5.0Vdc by connecting one resistor (shown as Rtrim in Figure 24) 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 ⋅ Ω Vo − 0.7525 Rtrim := Rtrim is the external resistor in Ω Vo is the desired output voltage Vo Vin ION/OFF RL On/Off GND Figure 22: Positive remote On/Off implementation Vo Vin Rpull-up ION/OFF On/Off RL GND Figure 23: Negative remote On/Off implementation 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_DNT12SIP03_03292013 7 FEATURES DESCRIPTIONS (CON.) For example, to program the output voltage of the DNT module to 3.3Vdc, Rtrim is calculated as follows: 10500 − 1000 ⋅ Ω 2.5475 Rtrim := Rtrim = 3.122 kΩ DNT can also be programmed by applying a voltage between the TRIM and GND pins (Figure 25). 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 Vtrim is the external voltage in V Table 1 VO (V) 0.7525 1.2 1.5 1.8 2.5 3.3 5.0 Rtrim (KΩ) Open 22.464 13.047 9.024 5.009 3.122 1.472 Table 2 VO (V) 0.7525 1.2 1.5 1.8 2.5 3.3 5.0 Vtrim (V) Open 0.670 0.650 0.630 0.583 0.530 0.4167 Vo is the desired output voltage For example, to program the output voltage of a DNT module to 3.3 Vdc, Vtrim is calculated as follows Vtrim := 0.7 − ( 2.5475 ⋅ 0.0667) Vtrim = 0.530V The amount of power delivered by the module is the voltage at the output terminals multiplied by the output current. When using the trim feature, the output voltage 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). Voltage Margining Figure 24: Circuit configuration for programming output voltage using an external resistor Output voltage margining can be implemented in the DNT modules by connecting a resistor, Rmargin-up, from the Trim pin to the ground pin for margining-up the output voltage and by connecting a resistor, Rmargin-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. Vin Vo Rmargin-down Q1 Figure 25: Circuit Configuration for programming output voltage On/Off Trim Rmargin-up using external voltage source Rtrim 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. DS_DNT12SIP03_03292013 Q2 GND Figure 26: Circuit configuration for output voltage margining 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. Figure 28: Temperature measurement location The allowed maximum hot spot temperature is defined at 125℃. 3.5 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’’). DNT12S0A0R03(standard) Output Current vs. Ambient Temperature and Air Velocity @Vin =12V,Vo=0.75~5.0V (Either Orientation,Preliminary Curves) Output Current (A) 3.0 Natural Convection 2.5 2.0 1.5 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. PWB FANCING PWB 1.0 0.5 0.0 25 30 35 40 45 50 55 60 65 70 75 80 85 Figure 29: Output current vs. ambient temperature and air velocity@ Vin=12V, Vo=0.75~5V (Either Orientation, preliminary curves) MODULE 50.8(2.00") AIR VELOCITY AND AMBIENT TEMPERATURE SURED BELOW THE MODULE AIR F LOW Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches) Figure 27: Wind tunnel test setup DS_DNT12SIP03_03292013 9 PICK AND PLACE LOCATION SURFACE- MOUNT TAPE & REEL LEAD (Sn/Pb) PROCESS RECOMMEND TEMP. PROFILE Temperature (°C ) 250 200 150 Ramp-up temp. 0.5~3.0°C /sec. Peak temp. 2nd Ramp-up temp. 210~230°C 5sec. 1.0~3.0°C /sec. 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 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 Note: All temperature refers to assembly application board, measured on the land of assembly application board. DS_DNT12SIP03_03292013 10 MECHANICAL DRAWING SMD PACKAGE (OPTIONAL) SIP PACKAGE Note: All pins are copper alloy with matte tin(Pb free) plated over Nickel under-plating. DS_DNT12SIP03_03292013 11 PART NUMBERING SYSTEM DNT 12 S Product Series Numbers of Input Voltage Outputs DNT - 3A or 5A 04 - 2.4V ~ 5.5V 12 - 8.3V ~ 14V S - Single 0A0 R Output Voltage Package Type 03 N F Output On/Off logic Current 0A0 R - SIP Programmable S - SMD 03 - 3A N - negative (Default) A Option Code F - RoHS 6/6 (Lead Free) A - Standard Functions P - positive MODEL LIST Model Name Package Input Voltage Output Voltage Output Current Efficiency 12Vin, 5Vout full load DNT12S0A0S03NFA SMD 8.3V ~ 14Vdc 0.75V ~ 5.0Vdc 3A 92.5% DNT12S0A0R03NFA SIP 8.3V ~ 14Vdc 0.75V ~ 5.0Vdc 3A 92.5% DNT12S0A0S05NFA SMD 8.3V ~ 14Vdc 0.75V ~ 5.0Vdc 5A 92% DNT12S0A0R05NFA SIP 8.3V ~ 14Vdc 0.75V ~ 5.0Vdc 5A 92% 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 (0)20 655 09 67 Fax: +31 (0)20 655 09 99 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 DS_DNT12SIP03_03292013 12