FEATURES High Efficiency: 93.0%@ 5Vin, 3.3V/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 0.75V to 3.63V 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, QS 9000, OHSAS 18001 certified manufacturing facility UL/cUL 60950 (US & Canada) Recognized, and TUV (EN60950)- pending CE mark meets 73/23/EEC and 93/68/EECpending Delphi DNT04, Non-Isolated Point of Load DC/DC Power Modules: 2.4~5.5Vin, 0.75~3.63Vo, 3A out OPTIONS The Delphi Series DNT04, 2.4-5.5V input, single output, non-isolated Point of Load DC/DC converters are the latest offering from a world Positive On/Off logic SIP package leader in power systems technology and manufacturing — Delta Electronics, Inc. The DNT04 series provides a programmable output voltage from 0.75V to 3.63V using external resistors. This product family is available in surface mount or SIP package and provides up to 3A of output current in an industry standard footprint. With creative design technology and optimization of component placement, these converters possess outstanding electrical and thermal performance, as well as APPLICATIONS extremely high reliability under highly stressful operating conditions. Telecom/DataCom Distributed power architectures Servers and workstations LAN/WAN applications Data processing applications The DNT04, 3A modules have excellent thermal performance and can provide full output current at up to 85℃ ambient temperature with no airflow. DATASHEET DS_DNT04SMD03_07182012 TECHNICAL SPECIFICATIONS (TA = 25°C, airflow rate = 300 LFM, Vin = 5 Vdc, nominal Vout unless otherwise noted.) PARAMETER NOTES and CONDITIONS DNT04S0A0S03NFA 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 Inout 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=3.3V Vo=2.5V Vo=1.8V Vo=1.5V Vo=1.2V Vo=0.75V 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 HighVoltage Logic Low Voltage Logic High Current Logic Low Current GENERAL SPECIFICATIONS MTBF Weight Vo ≦ Vin –0.5V Typ. Max. Units 0 -40 -55 5.8 85 125 Vdc °C °C 2.4 5.5 V 2.05 1.9 Vin=4.5V, Vo=3.3V, Io=3A 20 1 Vin=2.4V to 5.5V, Io=Io, min to Io, max Vin=5V, Io=Io, max Vin=2.4V to 5.5V Io=Io,min to Io,max Ta=-40℃ to 85℃ Over sample load, line and temperature 5Hz to 20MHz bandwidth Full Load, 1µF ceramic, 10µF tantalum Full Load, 1µF ceramic, 10µF tantalum -2.5 0.7525 Vo,set -3.0 30 10 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=100% of Io, max; Ta=25°C % Vo,set V +3.0 % Vo,set % Vo,set % Vo,set % Vo,set 50 15 3 1 200 1.6 mV mV A % Vo,set % Io Adc (rms) 220 220 50 mV mV µs 7 7 ms ms µF µF 1000 3000 Vin=5V, 100% Load Vin=5V, 100% Load Vin=5V, 100% Load Vin=5V, 100% Load Vin=5V, 100% Load Vin=5V, 100% Load Module On, Von/off Module Off, Von/off Module On, Ion/off Module Off, Ion/off +2.5 3.63 2.5 30 0.2 0.2 0.4 0 Module On, Von/off Module Off, Von/off Module On, Ion/off Module Off, Ion/off 0.1 TBD V V A mA mA 2 AS A 93.0 90.0 87.0 85.0 83.0 77.0 % % % % % % 300 kHz -0.2 1.5 0.2 0.3 Vin.max 10 1 V V µA mA 0.2 Vin.max 0.3 10 1 V V µA mA -0.2 21.44 2.3 M hours grams DS_DNT04SMD03_07182012 2 96 96 95 94 Efficiency (%) Efficiency (%) ELECTRICAL CHARACTERISTICS CURVES 94 93 92 92 90 88 86 91 84 90 0. 5 1 1. 5 2 2. 5 0. 5 3 1 Figure 1: Converter efficiency vs. output current (5Vin/3.3Vout) 2. 5 3 92 90 Efficiency (%) 90 Efficiency (%) 2 Figure 2: Converter efficiency vs. output current (5Vin/2.5Vout) 92 88 86 84 88 86 84 82 82 80 0. 5 1 1. 5 2 2. 5 3 0. 5 1 Out put cur r ent ( A) 1. 5 2 2. 5 3 Out put cur r ent ( A) Figure 3: Converter efficiency vs. output current (5Vin/1.8Vout) Figure 4: Converter efficiency vs. output current (5Vin/1.5Vout) 90 86 88 84 86 Efficiency (%) Efficiency (%) 1. 5 Out put cur r ent ( A) Out put cur r ent ( A) 84 82 82 80 78 76 80 74 78 0. 5 1 1. 5 2 2. 5 3 Out put cur r ent ( A) Figure 5: Converter efficiency vs. output current (5Vin/1.2Vout) 0. 5 1 1. 5 2 2. 5 3 Out put cur r ent ( A) Figure 6: Converter efficiency vs. output current (5Vin/0.75Vout) DS_DNT04SMD03_07182012 3 ELECTRICAL CHARACTERISTICS CURVES (CON.) Figure 7: Output ripple & noise at 5Vin, 3.3V/3A out Figure 8: Output ripple & noise at 5Vin, 2.5V/3A out Figure 9: Output ripple & noise at 5Vin, 1.8V/3A out Figure 10: Output ripple & noise at 5Vin, 1.5V/3A out Figure 11: Output ripple and noise at 5Vin, 1.2V/3A out Figure 12: Output ripple and noise at 5Vin, 0.75V/3A out DS_DNT04SMD03_07182012 4 ELECTRICAL CHARACTERISTICS CURVES (CON.) Figure 13: Turn on delay time at 5Vin, 3.3V/3A out Figure 14: Turn on delay time at 5Vin, 2.5V/3A out Top: Vout, 2V/div ; Bottom: Vin , 5V/div. 2mS/div Top: Vout, 2V/div; Bottom: Vin, 5V/div,.2mS/div Figure 15: Turn on delay time at 5Vin, 1.8V/3A out Figure 16: Turn on delay time at 5Vin, 1.5V/3A out Top: Vout, 2V/div; Bottom: Vin, 5V/div. 2mS/div Top: Vout, 2V/div; Bottom: Vin , 5V/div. 2mS/div Figure 17: Turn on delay time at 5Vin, 1.2V/3A out Figure 18: Turn on delay time at 5Vin, 0.75V/3A out Top: Vout, 2V/div; Bottom: Vin, 5V/div. 2mS/div Top: Vout, 2V/div; Bottom: Vin, 5V/div. 2mS/div DS_DNT04SMD03_07182012 5 ELECTRICAL CHARACTERISTICS CURVES Figure 19: Typical transient response to step load change at 2.5A/μS from 100% to 50% of Io, max at 5Vin, 3.3Vout (Cout = 1uF ceramic, 10μF tantalum) Figure 20: Typical transient response to step load change at 2.5A/μS from 50% to 100% of Io, max at 5Vin, 3.3Vout (Cout =1uF ceramic, 10μF tantalum) Vbias=1V Figure 21: Output short circuit current 5Vin, 0.75Vout 5A/div, 20mS/div Figure 22: Turn on with Prebias: 5Vin, 3.3V/0A out, Vbias =1.0Vdc TOP: Vout , 2.5V/div, Bottom :Vin, 5V/div, DS_DNT04SMD03_07182012 6 DESIGN CONSIDERATIONS TEST CONFIGURATIONS Input Source Impedance 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 23: Input reflected-ripple test setup SCOPE Safety Considerations 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. Vo 1uF 10uF tantalum ceramic 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 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. 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 an 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 24: Peak-peak output noise and startup transient measurement test setup. VI Vo GND Figure 25: 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_DNT04SMD03_07182012 7 FEATURES DESCRIPTIONS FEATURES DESCRIPTIONS (CON.) 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. The output voltage of the DNT can be programmed to any voltage between 0.75Vdc and 3.63Vdc by connecting one resistor (shown as Rtrim in Figure 30) 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: 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 28). 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 29). 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) Vo V in I O N /O F F O n/O ff RL 21070 Rtrim 5110 Vo 0.7525 For example, to program the output voltage of the DNT module to 1.8Vdc, Rtrim is calculated as follows: 21070 Rtrim 5110 15K 1 . 8 0 . 7525 DNT can also be programmed by apply a voltage between the TRIM and GND pins (Figure 31). The following equation can be used to determine the value of Vtrim needed for a desired output voltage Vo: Vtrim 0.7 0.1698 Vo 0.7525 For example, to program the output voltage of a DNT module to 3.3 Vdc, Vtrim is calculated as follows Vtrim 0.7 0.1698 3.3 0.7525 0.267V Q1 Vo GND RLoad TRIM Figure 26: Positive remote On/Off implementation Vo Vin Rpullup I O N /O FF Rtrim GND Figure 28: Circuit configuration for programming output voltage using an external resistor On/Off RL Q1 GND Figure 27: 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_DNT04SMD03_07182012 8 FEATURE DESCRIPTIONS (CON.) 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. RLoad GND + _ using external voltage source Rtrim (KΩ) Open 41.973 23.077 15.004 6.947 3.160 2.212 Table 2 VO (V) 0.7525 1.2 1.5 1.8 2.5 3.3 3.63 Vtrim TRIM Figure 29: Circuit Configuration for programming output voltage Table 1 VO (V) 0.7525 1.2 1.5 1.8 2.5 3.3 3.63 Vo Vtrim (V) Open 0.6240 0.5731 0.5221 0.4033 0.2674 0.2114 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 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 32 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 R margin-up and Rmargin-down for a specific output voltage and margin percentage. Vin Vo Rmargin-down Q1 On/Off Trim Rmargin-up Rtrim Q2 GND Figure 30: Circuit configuration for output voltage margining DS_DNT04SMD03_07182012 9 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 32: Temperature measurement location The allowed maximum hot spot temperature is defined at 125℃ DNT04S0A0S03(standard) Output Current vs. Ambient Temperature and Air Velocity @Vin = 5V,Vo=0.75V~3.3V (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 MODULE 0.5 0.0 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (℃) Figure 33: Derating curves, output current vs. ambient temperature and air velocity @ Vin=5V, Vout=0.75V~3.3V(Either Orientation) 50.8(2.00") AIR VELOCITY AND AMBIENT TEMPERATURE SURED BELOW THE MODULE 1.0 AIR FLOW Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches) Figure 31: Wind tunnel test setup DS_DNT04SMD03_07182012 10 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 Note: All temperature refers to assembly application board, measured on the land of assembly application board. DS_DNT04SMD03_07182012 11 MECHANICAL DRAWING SMD PACKAGE SIP PACKAGE (OPTIONAL) DS_DNT04SMD03_07182012 12 PART NUMBERING SYSTEM DNT 04 S 0A0 S 03 N Product Series Input Voltage Numbers of Outputs Output Voltage Package Type Output Current On/Off logic DNT- 3A/5A 04 - 2.4V~5.5V S - Single 0A0 Programmable R - SIP S - SMD 03 - 3A 05 - 5A F A Option Code N- negative P- positive F- RoHS 6/6 (Lead Free) A - Standard Function MODEL LIST Model Name Package Input Voltage Output Voltage Output Current Efficiency 5Vin, 3.3Vdc full load DNT04S0A0S03NFA SMD 2.4V ~ 5.5Vdc 0.75V ~ 3.63Vdc 3A 93.0% DNT04S0A0R03NFA SIP 2.4V ~ 5.5Vdc 0.75V ~ 3.63Vdc 3A 94.0% DNT04S0A0S05NFA SMD 2.4V ~ 5.5Vdc 0.75V ~ 3.63Vdc 5A 93.5% DNT04S0A0R05NFA SIP 2.4V ~ 5.5Vdc 0.75V ~ 3.63Vdc 5A 93.0% 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: Telephone: +31-20-655-0967 Fax: +31-20-655-0999 Email: [email protected] Asia & the rest of world: Telephone: +886 3 4526107 x6220~6224 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 any patent or patent rights of Delta. Delta reserves the right to revise these specifications at any time, without notice. DS_DNT04SMD03_07182012 13