DCT04S0A0S03NFA FEATURES High efficiency: 96.5% @ 5.0Vin, 3.3V3A out Small size and low profile: 12.2x 12.2x 7.25mm (0.48”x 0.48”x 0.29”) Surface mount packaging Standard footprint Voltage and resistor-based trim Pre-bias startup Output voltage tracking No minimum load required Output voltage programmable from 0.6Vdc to 3.3Vdc via external resistor Fixed frequency operation Input UVLO, output OCP Remote on/off ISO 9001, TL 9000, ISO 14001, QS9000, OHSAS18001 certified manufacturing facility UL/cUL 60950-1 (US & Canada) Delphi DCT, Non-Isolated Point of Load DC/DC Power Modules: 2.4-5.5Vin, 0.6-3.3V/3Aout OPTIONS The Delphi Series DCT, 2.4-5.5V input, single output, non-isolated Point of Load DC/DC converters are the latest Positive on/off logic Tracking feature offering from a world leader in power systems technology and manufacturing -- Delta Electronics, Inc. The DCT series provides a programmable output voltage from 0.6V to 3.3V using an external resistor and has flexible and programmable tracking features to enable a variety of startup voltages as well as tracking between power modules. This product family is available in surface mount and provides up to 3A of output current in an industry standard footprint. With APPLICATIONS Telecom / DataCom creative design technology and optimization of component Distributed power architectures placement, these converters possess outstanding electrical Servers and workstations and thermal performance, as well as extremely high LAN / WAN applications Data processing applications reliability under highly stressful operating conditions. DATASHEET DS_ DCT04S0A0S03NFA _05292012 E-mail: [email protected] http://www.deltaww.com/dcdc P1 TECHNICAL SPECIFICATIONS PARAMETER NOTES and CONDITIONS DCT04S0A0S03NFA Min. ABSOLUTE MAXIMUM RATINGS Input Voltage (Continuous) Tracking Voltage Operating Ambient 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 Input Reflected Ripple Current, peak-to-peak Vo ≦ Vin –0.6 Max. Units -0.3 -0.3 -40 -55 6 Vin,max 85 125 Vdc Vdc °C °C 2.4 5.5 V 2.2 2.0 15 5 (5Hz to 20MHz, 1μH source impedance; VIN =0 to 5.5V, Io= Iomax ; 25 3.25 mAp-p 40 dB 1 with 0.5% tolerance for external resistor used to set output voltage) 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 Settling Time to 10% of Peak Deviation Turn-On Transient Start-Up Time, From On/Off Control Start-Up Time, From Input Output Voltage Rise Time Output Capacitive Load EFFICIENCY Vo=3.3V Vo=2.5V Vo=1.8V Vo=1.5V Vo=1.2V Vo=0.6V FEATURE CHARACTERISTICS Switching Frequency ON/OFF Control, (Negative logic) Logic Low Voltage Logic High Voltage Logic Low Current Logic High Current ON/OFF Control, (Positive Logic) Logic High Voltage Logic Low Voltage Logic Low Current Logic High Current 0Tracking Slew Rate Capability Tracking Delay Time Tracking Accuracy GENERAL SPECIFICATIONS MTBF Weight V V A mA mA A2S Vin=2.4V to 5.5V, Vo=1.8V, Io=Io,max, Vin=5V Vin=5V Input Ripple Rejection (120Hz) OUTPUT CHARACTERISTICS Output Voltage Set Point Typ. For Vo>=2.5V For Vo<2.5V For Vo>=2.5V For Vo<2.5V 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 -1.5 +1.5 % Vo,set 0.6 Vo,set 3.3 V -3.0 0.4 10 10 5 0.4 +3.0 % Vo,set mV mV mV % Vo,set % Vo,set 35 15 3 1 250 1 mV mV A % Vo,set % Io Adc 180 180 500 mV mV µs 2 2 2 ms ms ms µF µF 25 10 0 Vout=3.3V Hiccup mode, Io,s/c 10µF Tan & 1µF Ceramic load cap, 2.5A/µs,Co=47u,Vin=5V,Vo=1.8V 0-50% Iomax 50% Iomax-0 Io=Io.max Von/off, Vo=10% of Vo,set Vin=Vin,min, Vo=10% of Vo,set Time for Vo to rise from 10% to 90% of Vo,set Full load; ESR ≧0.15mΩ Full load; ESR ≧10mΩ 47 47 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 -0.2 Vin-0.8 Module On, Von/off Module Off, Von/off Module On, Ion/off Module Off, Ion/off 1.6 -0.3 Delay from Vin.min to application of tracking voltage Power-up 2V/mS Power-down 1V/mS Io=80% of Io, max; Ta=25°C 5 1000 3000 96.5 95.5 93.5 92.0 90.0 83.0 % % % % % % 600 kHz 0.2 0.2 0.1 10 Vin-1.6 Vin,max 200 1 V V µA mA Vin,max 0.3 1 10 2 V V mA µA V/msec ms mV mV 100 100 1 2.0 M hours grams (TA = 25°C, airflow rate = 300 LFM, Vin =2.4Vdc to 5.5Vdc, nominal Vout unless otherwise noted.) DS_DCT04S0A0S03NFA_05292012 E-mail: [email protected] http://www.deltaww.com/dcdc P2 ELECTRICAL CHARACTERISTICS CURVES Figure 1: Converter efficiency vs. output current (0.6V out) Figure 2: Converter efficiency vs. output current (1.2V out) Figure 3: Converter efficiency vs. output current (1.5V out) Figure 4: Converter efficiency vs. output current (1.8V out) Figure 5: Converter efficiency vs. output current (2.5V out) DS_DCT04S0A0S03NFA_05292012 Figure 6: Converter efficiency vs. output current (3.3V out) E-mail: [email protected] http://www.deltaww.com/dcdc P3 ELECTRICAL CHARACTERISTICS CURVES (CON.) Figure 7: Output ripple & noise at 5Vin, 0.6V/3A out. (2us/div and Figure 8: Output ripple & noise at 5Vin, 1.2V/3A out. (2us/div and 5mV/div) 5mV/div) Figure 9: Output ripple & noise at 5Vin, 1.8V/3A out. (2us/div and Figure 10: Output ripple & noise at 5Vin, 3.3V/3A out. (2us/div and 5mV/div) 5mV/div) DS_DCT04S0A0S03NFA_05292012 E-mail: [email protected] http://www.deltaww.com/dcdc P4 Figure 11: Turn on delay time at 5Vin, 0.6V/3A out(2mS/div),Top Figure 12: Turn on delay time at 5Vin, 1.2V/3A out(2mS/div),Top trace:Vout 0.2V/div; bottom trace:Vin,5V/div trace:Vout 0.5V/div; bottom trace:Vin,5V/div DS_DCT04S0A0S03NFA_05292012 E-mail: [email protected] http://www.deltaww.com/dcdc P5 Electrical Characteristics Curves (con.) Figure 13: Turn on delay time at 5Vin, 1.8V/3A out(2mS/div),Top Figure 14: Turn on delay time at 5Vin, 3.3V/3A out(2mS/div),Top trace:Vout 1V/div; bottom trace:Vin,5V/div trace:Vout 2V/div; bottom trace:Vin,5V/div Figure 15: Turn on delay time at remote on/off, 0.6V/3A Figure 16: Turn on delay time at remote on/off, 3.3V/3A out(2mS/div),Top trace:Vout 2V/div; bottom trace: on/off,2V/div out(2mS/div),Top trace:Vout 0.2V/div; bottom trace: on/off,2V/div Figure 17: Turn on delay time at remote turn on with external capacitors (Co= 3000 µF) 5Vin, 3.3V/3A out DS_DCT04S0A0S03NFA_05292012 Figure 18: Turn on delay time at remote turn on with external capacitors (Co= 3000 µF) 3.3Vin, 2.5V/3A out E-mail: [email protected] http://www.deltaww.com/dcdc P6 ELECTRICAL CHARACTERISTICS CURVES Figure 19: Typical transient response to step load change at 2.5A/μS from 100% to 0% of Io, max at 5Vin, 0.6Vout (200uS/div) (Cout = 47uF ceramic).top trace:Vout,0.1V/div;bottom trace:Iout:2A/div. Figure 20: Typical transient response to step load change at 2.5A/μS from 0% to 100% of Io, max at 5Vin, 0.6Vout (200uS/div ) (Cout = 47uF ceramic).top trace:Vout,0.1V/div;bottom trace:Iout:2A/div. Figure 21: Typical transient response to step load change at 2.5A/μS from 100% to 0% of Io, max at 5Vin, 1.2Vout (200uS/div) (Cout = 47uF ceramic).top trace:Vout,0.1V/div;bottom trace:Iout:2A/div. Figure 22: Typical transient response to step load change at 2.5A/μS from 0% to 100% of Io, max at 5Vin, 1.2Vout (200uS/div) (Cout = 47uF ceramic).top trace:Vout,0.1V/div;bottom trace:Iout:2A/div. DS_DCT04S0A0S03NFA_05292012 E-mail: [email protected] http://www.deltaww.com/dcdc P7 Electrical Characteristics Curves (con.) Figure 23: Typical transient response to step load change at 2.5A/μS from 100% to 0% of Io, max at 5Vin, 1.8Vout (200uS/div) (Cout = 47uF ceramic).top trace:Vout,0.1V/div;bottom trace:Iout:2A/div. Figure 24: Typical transient response to step load change at 2.5A/μS from 0% to 100% of Io, max at 5Vin, 1.8Vout (200uS/div) (Cout = 47uF ceramic).top trace:Vout,0.1V/div;bottom trace:Iout:2A/div. Figure 25: Typical transient response to step load change at 2.5A/μS from 100% to 0% of Io, max at 5Vin, 3.3Vout (200uS/div) (Cout = 47uF ceramic).top trace:Vout,0.1V/div;bottom trace:Iout:2A/div. Figure 26: Typical transient response to step load change at 2.5A/μS from 0% to 100% of Io, max at 5Vin, 3.3Vout (200uS/div) (Cout = 47uF ceramic).top trace:Vout,0.1V/div;bottom trace:Iout:2A/div. DS_DCT04S0A0S03NFA_05292012 E-mail: [email protected] http://www.deltaww.com/dcdc P8 Figure 27: Output short circuit current 5Vin, 3.3Vout（10mS/div） Figure 28:Tracking at 5Vin, 3.3V/3A out(1mS/div), tracking Top trace:Vout,0.5V/div;Bottom trace:Iout,5A/div voltage=4V,top trace:Vseq,1V/div;bottom trace:Vout,1V/div DS_DCT04S0A0S03NFA_05292012 E-mail: [email protected] http://www.deltaww.com/dcdc P9 DESIGN CONSIDERATIONS TEST CONFIGURATIONS Input Source Impedance To maintain low noise and ripple at the input voltage, it is critical to use low ESR capacitors at the input to the module. A highly inductive source 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. Figure 29: Input reflected-ripple test setup Vo 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 30: Peak-peak output noise and startup transient measurement test setup. VI Vo GND Figure 31: 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_DCT04S0A0S03NFA_05292012 E-mail: [email protected] http://www.deltaww.com/dcdc P10 DESIGN CONSIDERATIONS (CON.) FEATURES DESCRIPTIONS Safety Considerations Remote On/Off 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. The DCT 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 DCT series power modules. 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 6A fuse in the ungrounded lead. Input Under voltage Lockout At input voltages below the input under voltage lockout limit, the module operation is disabled. The module will begin to operate at an input voltage above the under For negative 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 32). Negative logic On/Off signal turns the module ON during the logic high and turns the module OFF during the logic low. When the negative On/Off function is not used, tie the pin to GND (module will be On). For positive logic module, the On/Off pin is pulled high with an external pull-up 5kΩ resistor (see figure 33). Positive logic On/Off signal turns the module ON during logic high and turns the module OFF during logic low. If the Positive On/Off function is not used, tie the pin to Vin. (module will be On) voltage lockout turn-on threshold. 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. Vo V in I O N /O F F O n/O ff RL Q1 GND Figure 32: Negaitive remote On/Off implementation Vo Vin Rpullup I O N /O FF On/Off RL Q1 GND Figure 33: Positive 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_DCT04S0A0S03NFA_05292012 E-mail: [email protected] http://www.deltaww.com/dcdc P11 FEATURES DESCRIPTIONS (CON.) Vo Remote Sense RLoad TRIM The DCT provide Vo remote sensing to achieve proper regulation at the load points and reduce effects of distribution losses on output line. In the event of an open remote sense line, the module shall maintain local sense regulation through an internal resistor. The module shall correct for a total of 0.5V of loss. The remote sense line impedance shall be < 10. Distribution Losses Vo Vin Distribution Losses Sense Rtrim GND Figure 35: Circuit configuration for programming output voltage using an external resistor Table 1 provides Rtrim values required for some common output voltages, By using a 0.5% tolerance trim resistor, set point tolerance of ±1.5% can be achieved as specified in the electrical specification. RL Table 1 GND Distribution FigureLosses 34: Effective Distribution Losses circuit configuration for remote sense operation Output Voltage Programming The output voltage of the DCT can be programmed to any voltage between 0.6Vdc and 3.3Vdc by connecting one resistor (shown as Rtrim in Figure 35) between the TRIM and GND pins of the module. Without this external resistor, the output voltage of the module is 0.6 Vdc. To calculate the value of the resistor Rtrim for a particular output voltage Vo, please use the following equation: 1.2 Rtrim k Vo 0.6 For example, to program the output voltage of the DCT module to 1.8Vdc, Rtrim is calculated as follows: 1.2 Rtrim k 1K 1.8 0.6 0.6V Open 1V 3K 1.2V 2K 1.5V 1.8V 1.333K 1K 2.5V 0.632K 3.3V 0.444K Certain restrictions apply on the output voltage set point depending on the input voltage. These are shown in the Output Voltage vs. Input Voltage Set Point Area plot in Figure 36. The Upper Limit curve shows that for output voltages of 3.3V and lower, the input voltage must be lower than the maximum of 5.5V. The Lower Limit curve shows that for output voltages of 1.8V and higher, the input voltage needs to be larger than the minimum of 2.4V. Figure 36: Output Voltage vs. Input Voltage Set Point Area plot showing limits where the output voltage can be set for different input voltages. DS_DCT04S0A0S03NFA_05292012 E-mail: [email protected] http://www.deltaww.com/dcdc P12 FEATURE DESCRIPTIONS (CON.) When an analog voltage is applied to the SEQ pin, the output voltage tracks this voltage until the output reaches Voltage Margining the set-point voltage. The final value of the SEQ voltage Output voltage margining can be implemented in the DCT 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 3 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 must be set higher than the set-point voltage of the module. The output voltage follows the voltage on the SEQ pin on a one-to-one basis. By connecting multiple modules together, multiple modules can track their output voltages to the voltage applied on the SEQ pin. For proper voltage sequencing, first, input voltage is applied to the module. The On/Off pin of the module is left unconnected (or tied to GND for negative logic modules or tied to VIN for positive logic modules) so that Vo Rmargin-down Q1 the module is ON by default. After applying input voltage to the module, a minimum 10msec delay is required On/Off Trim Rtrim Rmargin-up before applying voltage on the SEQ pin. This delay gives Q2 the module enough time to complete its internal power-up GND soft-start cycle. During the delay time, the SEQ pin should be held close to ground (nominally 50mV ± 20 Figure 37: Circuit configuration for output voltage margining Output Voltage Sequencing The DCT modules include a sequencing feature, EZ-SEQUENCE that enables users to implement various types of output voltage sequencing in their applications. This is accomplished via an additional sequencing pin. When not using the sequencing feature, either tie the SEQ pin to VIN or leave it unconnected. mV). This is required to keep the internal op-amp out of saturation thus preventing output overshoot during the start of the sequencing ramp. By selecting resistor R1 (see Figure. 38) according to the following equation 24950 R1 Vin 0.05 The voltage at the sequencing pin will be 50mV when the sequencing signal is at zero. DS_DCT04S0A0S03NFA_05292012 E-mail: [email protected] http://www.deltaww.com/dcdc P13 FEATURE DESCRIPTIONS (CON.) Monotonic Start-up and Shutdown After the 10msec delay, an analog voltage is applied to The DCT 3A modules have monotonic start-up and the SEQ pin and the output voltage of the module will shutdown behavior for any combination of rated input track this voltage on a one-to-one volt bases until the voltage, output current and operating temperature range. output reaches the set-point voltage. To initiate simultaneous shutdown of the modules, the SEQ pin voltage is lowered in a controlled manner. The output voltage of the modules tracks the voltages below their set-point voltages on a one-to-one basis. A valid input voltage must be maintained until the tracking and output voltages reach ground potential. When using the EZ-SEQUENCETM feature to control start-up of the module, pre-bias immunity during startup is disabled. The pre-bias immunity feature of the module relies on the module being in the diode-mode during start-up. When using the EZ-SEQUENCETM feature, modules goes through an internal set-up time of 10msec, and will be in synchronous rectification mode when the voltage at the SEQ pin is applied. This will result in the module sinking current if a pre-bias voltage is present at the output of the module. Figure 38: Circuit showing connection of the sequencing signal to the SEQ pin. DS_DCT04S0A0S03NFA_05292012 Simultaneous E-mail: [email protected] http://www.deltaww.com/dcdc P14 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 40: Temperature measurement location The allowed maximum hot spot temperature is defined at 109℃ Output Current (A) DCT04S0A0S03 Output Current vs. Ambient Temperature and Air Velocity @Vin=5V Vout=2.5V~3.3V (Either Orientation) 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. 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 41: Output current vs. ambient temperature and air velocity@Vin=5V, Vout=2.5V~3.3V(Either Orientation) MODULE Output Current (A) DCT04S0A0S03 Output Current vs. Ambient Temperature and Air Velocity @Vin=3.3V Vout=0.6V~1.8V (Either Orientation) 3.5 3.0 Natural Convection 2.5 50.8(2.00") AIR VELOCITY AND AMBIENT TEMPERATURE SURED BELOW THE MODULE 2.0 1.5 AIR FLOW 1.0 0.5 Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches) 0.0 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (℃) Figure 39: Wind tunnel test setup DS_DCT04S0A0S03NFA_05292012 Figure 42: Output current vs. ambient temperature and air velocity@Vin=3.3V, Vout=0.6V~1.8V(Either Orientation) E-mail: [email protected] http://www.deltaww.com/dcdc P15 PICK AND PLACE LOCATION RECOMMENDED PAD LAYOUT SURFACE-MOUNT TAPE & REEL DS_DCT04S0A0S03NFA_05292012 E-mail: [email protected] http://www.deltaww.com/dcdc P16 LEAD (Sn/Pb) PROCESS RECOMMEND TEMP. PROFILE Note: The temperature refers to the pin of DCT, measured on the pin Vout joint. 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: The temperature refers to the pin of DCT, measured on the pin Vout joint. DS_DCT04S0A0S03NFA_05292012 E-mail: [email protected] http://www.deltaww.com/dcdc P17 MECHANICAL DRAWING DS_DCT04S0A0S03NFA_05292012 E-mail: [email protected] http://www.deltaww.com/dcdc P18 PART NUMBERING SYSTEM DCT 04 S 0A0 S 03 N Product Series Input Voltage Numbers of Outputs Output Voltage Package Type Output Current On/Off logic DCT - 3A DCS- 6A DCM - 12A DCL - 20A 04 2.4~5.5V 12 – 4.5~14V S - Single 0A0 S - SMD Programmable 03-3A 06 - 6A 12 - 12A 20 - 20A F N- negative P- positive A Option Code F- RoHS 6/6 (Lead Free) A - Standard Function MODEL LIST Model Name Packaging Input Voltage Output Voltage Output Current Efficiency 5.0Vin, 3.3Vdc @ 3A DCT04S0A0S03NFA SMD 2.4 ~ 5.5Vdc 0.6V~ 3.3Vdc 3A 96.5% CONTACT: www.deltaww.com/dcdc USA: Telephone: East Coast: (888) 335 8201 West Coast: (888) 335 8208 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 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 any patent or patent rights of Delta. Delta reserves the right to revise these specifications at any time, without notice . DS_DCT04S0A0S03NFA_05292012 E-mail: [email protected] http://www.deltaww.com/dcdc P19 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Delta: DCT04S0A0S03NFA