FEATURES High efficiency: 95.6% @ 12Vin, 5V/3A 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 0.59Vdc to 5.5Vdc 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) CE mark meets 73/23/EEC and 93/68/EEC directives Delphi DCT, Non-Isolated Point of Load DC/DC Power Modules: 4.5~14Vin, 0.59-5.5V/3Aout The Delphi Series DCT, 4.5-14V input, single output, non-isolated Point of Load DC/DC converters are the latest offering from a world leader in power systems technology and manufacturing -Delta Electronics, Inc. The DCT series provides a programmable OPTIONS Negative/Positive on/off logic Tracking feature output voltage from 0.59 V to 5.5V 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 creative design APPLICATIONS technology Telecom / DataCom Distributed power architectures Servers and workstations LAN / WAN applications Data processing applications and optimization of component placement, these converters possess outstanding electrical and thermal performance, as well as extremely high reliability under highly stressful operating conditions. 0 DATASHEET DS_DCT12S0A0S03PFA_09172013 TECHNICAL SPECIFICATIONS (TA = 25°C, airflow rate = 300 LFM, Vin = 4.5Vdc to 14Vdc, nominal Vout unless otherwise noted.) PARAMETER NOTES and CONDITIONS DCT12S0A0S03PFA Min. ABSOLUTE MAXIMUM RATINGS Input Voltage (Continuous) Sequencing Voltage Operating Ambient Temperature Storage Temperature 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 (VIN = 12.0Vdc, Io = 0, module enabled) Off Converter Input Current (VIN = 12.0Vdc, module disabled) Inrush Transient Input Reflected Ripple Current, peak-to-peak OUTPUT CHARACTERISTICS Output Voltage Set Point Output Voltage Adjustable Range Output Voltage Regulation Vo ≦ Vin –0.6 For Vo>=2.5V For Vo<2.5V For Vo>=2.5V For Vo<2.5V For Vo>=2.5V For Vo<2.5V Over sample load, line and temperature 5Hz to 20MHz bandwidth Total Output Voltage Range Output Voltage Ripple and Noise GENERAL SPECIFICATIONS MTBF Weight Vin max V -40 -55 85 125 ℃ ℃ 4.5 14.0 V 4.4 V V 3.0 A mA 10 25 86 -1.5 Vo,set V mA 1 Temperature(Tref=TA, min to TA, max) EFFICIENCY Vo=5.0V Vo=2.5V Vo=1.2V Vo=0.59V 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 Tracking Slew Rate Capability Tracking Delay Time Tracking Accuracy 15 -0.3 0.8 (5Hz to 20MHz, 1μH source impedance; Vin =0 to 14V, Io= Iomax ; with 0.5% tolerance for external resistor used to set output voltage) (selected by an external resistor) Units -0.3 Vin=4.5V to14V, Io=Io,max Vo,set = 0.6 Vdc Vo,set = 3.3 Vdc Load(Io=Io, min to Io, max) 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 Max. 3.2 0.4 Line(VIN=VIN, min to VIN, max) Peak-to-Peak Typ. +1.5 A2S mAp-p %Vo,set 0.59 5.5 V -2.5 0.4 10 10 5 0.4 5 +2.5 %Vo,set Vo,set mV mV mV %Vo,set mV VoVo,set %Vo,set Full Load, 1µF+10uF ceramic, 15 30 mV Full Load, 1µF+10uF ceramic, 10 20 3 3 300 0.5 mV A % Vo,set % Io Adc 200 200 20 mV mV µs 2 2 4 ms ms ms µF µF 0 Vout=5.0V Io,s/c 10µF Tan & 1µF Ceramic load cap, 2.5A/µs 0% Io, max to 100% Io, max 100% Io, max to 0% Io, max Io=Io.max Time for Von/off to Vo=10% of Vo,set Time for Vin=Vin,min to 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=12V, 100% Load Vin=12V, 100% Load Vin=4.5V, 100% Load Vin=4.5V, 100% Load 5 1000 3000 95.6 92.6 90.5 83.2 % % % % 600 kHz Module On, Von/off Module Off, Von/off Module On, Ion/off Module Off, Ion/off -0.2 3.5 0.6 Vin,max 10 1 V V µA mA Module On, Von/off Module Off, Von/off Module On, Ion/off Module Off, Ion/off 3.0 -0.3 Vin,max 0.6 1 10 2 V V mA µA V/msec ms mV mV 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 DS_DCT12S0A0S03PFA_09172013 10 100 100 17.95 2.0 M hours grams 2 ELECTRICAL CHARACTERISTICS CURVES Figure 1: Converter efficiency vs. output current (5.0V out) Figure 2: Converter efficiency vs. output current (2.5V out) Figure 3: Converter efficiency vs. output current (1.2V out) Figure 4: Converter efficiency vs. output current (0.59V out) DS_DCT12S0A0S03PFA_09172013 3 ELECTRICAL CHARACTERISTICS CURVES (CON.) Figure 5: Output ripple & noise at 12Vin, 5.0V/3A out, Figure 6: Output ripple & noise at 12Vin, 2.5V/3A out CH1:VOUT, 10mV/div, 1uS/div CH1:VOUT, 10mV/div, 1uS/div Figure 7: Output ripple & noise at 12Vin, 1.2V/3A out Figure 8: Output ripple & noise at 12Vin, 0.59V/3A out CH1:VOUT, 5mV/div, 1uS/div CH1:VOUT, 5mV/div, 1uS/div DS_DCT12S0A0S03PFA_09172013 4 ELECTRICAL CHARACTERISTICS CURVES (CON.) Figure 9: Turn on delay time at 12Vin, 5.0V/3A out Figure 10: Turn on delay time at 12Vin, 2.5V/3A out (upper : VOUT, 2V/div, low: VIN, 5V/div. 2mS/div) (upper : VOUT, 1V/div, low: VIN, 5V/div. 2mS/div) Figure 11: Turn on delay time at 12Vin, 1.2V/3A out Figure 12: Turn on delay time at 12Vin, 0.59V/3A out (upper : VOUT, 1V/div, low: VIN, 5V/div. 2mS/div) (upper : VOUT, 0.5V/div, low: VIN, 5V/div. 2mS/div) DS_DCT12S0A0S03PFA_09172013 5 Figure 13: Turn on delay time at remote on 12Vin, 5.0V/3A out Figure 14: Turn on delay time at remote on 12Vin, 2.5V/3A out (upper : VOUT, 2V/div, low: OUTEN, 2V/div. 2mS/div) (upper : VOUT, 1V/div, low: OUTEN, 2V/div. 2mS/div) Figure 15: Turn on delay time at remote on with external capacitors (Co= 3000 µF) 12Vin, 1.2V/3A out (upper : VOUT, 1V/div, low: OUTEN, 2V/div. 2mS/div) Figure 16: Turn on delay time at remote on with external capacitors (Co= 3000 µF) 12Vin, 0.59V/3A out (upper : VOUT, 0.5V/div, low: OUTEN, 2V/div. 2mS/div) DS_DCT12S0A0S03PFA_09172013 6 ELECTRICAL CHARACTERISTICS CURVES Figure 17: Typical transient response to step load change at 1A/μS from 100%~ 0%~100% of Io, max at 12Vin, 5.0Vout (Cout = 1uF ceramic, 47uF+10μFceramic) CH1 : VOUT, 0.1V/div, 5mS/div Figure 18: Typical transient response to step load change at 1A/μS from 100%~ 0%~100% of Io, max at 12Vin, 2.5Vout (Cout = 1uF ceramic, 47uF+10μFceramic) CH1 : VOUT, 0.1V/div, 5mS/div Figure 19: Typical transient response to step load change at 1A/μS from 100%~ 0%~100% of Io, max at 12Vin, 1.2Vout (Cout = 1uF ceramic, 47uF+10μFceramic) CH1 : VOUT, 0.1V/div, 5mS/div Figure 20: Typical transient response to step load change at 1A/μS from 100%~ 0%~100% of Io, max at 12Vin, 0.59Vout (Cout = 1uF ceramic, 47uF+10μFceramic) CH1 : VOUT, 0.1V/div, 5mS/div DS_DCT12S0A0S03PFA_09172013 7 ELECTRICAL CHARACTERISTICS CURVES (CON.) Figure 21: Output short circuit current 12Vin, 5.0Vout Figure 22:Tracking funciton, Vtracking=6V, Vout= 5.0V, full load Upper: output current, low: Vout, 2V/div Upper: Vtracking, 2V/div, low: Vout, 2V/div DS_DCT12S0A0S03PFA_09172013 8 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 23: 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 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_DCT12S0A0S03PFA_09172013 9 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 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 figure26). 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 5kΩ resistor (see figure 35). 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) begin to operate at an input voltage above the under Vo V in voltage lockout turn-on threshold. I O N /O F F 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. O n/O ff RL Q1 GND Figure 26: Positive remote On/Off implementation Vo Vin Rpullup I O N /O FF On/Off RL Q1 GND Figure 27: Negative remote On/Off implementation DS_DCT12S0A0S03PFA_09172013 10 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 Distribution Losses Vo Vin Rtrim GND Figure 29: 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. Sense RL Table 1 GND Distribution FigureLosses 28: 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 0.59Vdc and 5.5Vdc by connecting one resistor (shown as Rtrim in Figure 29) between the TRIM and GND pins of the module. Without this external resistor, the output voltage of the module is 0.59 Vdc. To calculate the value of the resistor Rtrim for a particular output voltage Vo, please use the following equation: Vo(V) Rtrim(KΩ) 0.590 Open 0.600 656.700 1.000 14.450 1.200 9.704 1.500 6.502 1.800 4.888 2.500 3.096 3.300 2.182 5.000 1.340 Certain restrictions apply on the output voltage set point 5.91 Rtrim K Vo 0.591 depending on the input voltage. These are shown in the Rtrim is the external resistor in kΩ Figure 30. The Upper Limit curve shows that for output Vo is the desired output voltage. For example, to program the output voltage of the DNS module to 5.0Vdc, Rtrim is calculated as follows: voltages of 0.9V and lower, the input voltage must be lower 5.91 Rtrim K 1.34 K 5.0 0.591 Output Voltage vs. Input Voltage Set Point Area plot in than the maximum of 14V. The Lower Limit curve shows that for output voltages of 3.8V and higher, the input voltage needs to be larger than the minimum of 4.5V. Figure 30: Output Voltage vs. Input Voltage Set Point Area plot DS_DCT12S0A0S03PFA_09172013 showing limits where the output voltage can be set for different input voltages. 11 FEATURE DESCRIPTIONS (CON.) When an analog voltage is applied to the SEQ pin, the Voltage Margining output voltage tracks this voltage until the output reaches 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, Rmargin-down, from the Trim pin to the output pin for margining-down. Figure 31 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 the set-point voltage. The final value of the SEQ voltage 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 On/Off Trim Rtrim the module is ON by default. After applying input voltage to the module, a minimum 10msec delay is required 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 31: Circuit configuration for output voltage margining mV). This is required to keep the internal op-amp out of Output Voltage Sequencing saturation thus preventing output overshoot during the The DCT 12V 3A modules include a sequencing feature, start of the sequencing ramp. By selecting resistor R1 EZ-SEQUENCE that enables users to implement various (see Figure. 33) according to the following equation types of output voltage sequencing in their applications. This is accomplished via an additional sequencing pin. 24950 R1 Vin 0.05 When not using the sequencing feature, either tie the SEQ pin to VIN or leave it unconnected. Figure 32: Sequential Start-up The voltage at the sequencing pin will be 50mV when the sequencing signal is at zero. DS_DCT12S0A0S03PFA_09172013 12 FEATURE DESCRIPTIONS (CON.) Power Good The DCT modules provide a Power Good (PGOOD) After the 10msec delay, an analog voltage is applied to the SEQ pin and the output voltage of the module will track this voltage on a one-to-one volt bases until the 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. signal that is implemented with an open-drain output to indicate that the output voltage is within the regulation limits of the power module. The PGOOD signal will be de-asserted to a low state if any condition such as over temperature, over current or loss of regulation occurs that would result in the output voltage going ±10% outside the set point value. The PGOOD terminal should be connected through a pull up resistor (suggested value 100KΩ) to a source of 5VDC or lower. 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 Monotonic Start-up and Shutdown relies on the module being in the diode-mode during The DCT 3A modules have monotonic start-up and start-up. When using the EZ-SEQUENCETM feature, shutdown behavior for any combination of rated input modules goes through an internal set-up time of 10msec, voltage, output current and operating temperature range. 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 33: Circuit showing connection of the sequencing signal to the SEQ pin. DS_DCT12S0A0S03PFA_09172013 Simultaneous 13 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. Figure 35: Temperature measurement location The allowed maximum hot spot temperature is defined at 115℃ Output Current (A) DCT12S0A0S03 Output Current vs. Ambient Temperature and Air Velocity @Vin=12V Vout=5.0V (Either Orientation) 3.0 Natural Convection 2.5 100LFM 2.0 200LFM Thermal Derating 300LFM 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 55 60 65 70 75 80 85 90 95 100 105 Ambient Temperature (℃) Figure 36: Output current vs. ambient temperature and air velocity@Vin=12V, Vout=5.0V(Either Orientation) MODULE Output Current (A) DCT12S0A0S03 Output Current vs. Ambient Temperature and Air Velocity @Vin=12V Vout=3.3V (Either Orientation) 3.0 Natural Convection 2.5 AIR VELOCITY AND AMBIENT TEMPERATURE SURED BELOW THE MODULE 100LFM 50.8(2.00") 2.0 1.5 AIR FLOW 1.0 0.5 Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches) 0.0 55 60 65 70 75 80 85 90 95 100 105 Ambient Temperature (℃) Figure 34: Wind tunnel test setup DS_DCT12S0A0S03PFA_09172013 Figure 37: Output current vs. ambient temperature and air velocity@Vin=12V, Vout=3.3V(Either Orientation) 14 Output Current (A) DCT12S0A0S03 Output Current vs. Ambient Temperature and Air Velocity @Vin=12V Vout=2.5V (Either Orientation) Output Current (A) 3.0 DCT12S0A0S03 Output Current vs. Ambient Temperature and Air Velocity @Vin=12V Vout=0.6V (Either Orientation) 3.0 Natural Convection Natural Convection 2.5 2.5 100LFM 2.0 2.0 1.5 1.5 1.0 1.0 0.5 0.5 0.0 55 60 65 70 75 80 85 90 95 100 105 Ambient Temperature (℃) Figure 38: Output current vs. ambient temperature and air velocity@Vin=12V, Vout=2.5V(Either Orientation) Output Current (A) 0.0 55 60 65 70 75 80 85 90 95 100 105 Ambient Temperature (℃) Figure 41: Output current vs. ambient temperature and air velocity@Vin=12V, Vout=0.6V(Either Orientation) DCT12S0A0S03 Output Current vs. Ambient Temperature and Air Velocity @Vin=12V Vout=1.8V (Either Orientation) 3.0 Natural Convection 2.5 2.0 1.5 1.0 0.5 0.0 55 60 65 70 75 80 85 90 95 100 105 Ambient Temperature (℃) Figure 39: Output current vs. ambient temperature and air velocity@Vin=12V, Vout=1.8V(Either Orientation) Output Current (A) DCT12S0A0S03 Output Current vs. Ambient Temperature and Air Velocity @Vin=12V Vout=1.2V (Either Orientation) 3.0 Natural Convection 2.5 2.0 1.5 1.0 0.5 0.0 55 60 65 70 75 80 85 90 95 100 105 Ambient Temperature (℃) Figure 40: Output current vs. ambient temperature and air velocity@Vin=12V, Vout=1.2V(Either Orientation) DS_DCT12S0A0S03PFA_09172013 15 PICK AND PLACE LOCATION RECOMMENDED PAD LAYOUT SURFACE-MOUNT TAPE & REEL DS_DCT12S0A0S03PFA_09172013 16 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_DCT12S0A0S03PFA_09172013 17 MECHANICAL DRAWING DS_DCT12S0A0S03PFA_09172013 18 PART NUMBERING SYSTEM DCT 12 S 0A0 S 03 P Product Series Input Voltage Numbers of Outputs Output Voltage Package Type Output Current On/Off logic S - Single 0A0 Programmable S - SMD 03 – 3A 06 - 6A 12 - 12A 20 - 20A DCT -3A DCS - 6A DCM - 12A DCL - 20A 04 - 2.4~5.5V 12 – 4.5~14V 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 12Vin, 5Vdc @ 3A DCT12S0A0S03PFA SMD 4.5 ~ 14.0Vdc 0.59V~ 5.5Vdc 3A 95.6% 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 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_DCT12S0A0S03PFA_09172013 19