FEATURES High Efficiency: 92% @ 12Vin, 5V/40A out Voltage and resistor-based trim No minimum load required Output voltage programmable from 0.9Vdc to 5.0Vdc via external resistors Fixed frequency operation Input UVLO, output OVP, OTP, OCP, SCP Remote ON/OFF (default: positive) Power good output signal Output voltage sense ISO 9001, TL 9000, ISO 14001, QS 9000, OHSAS 18001 certified manufacturing facility UL/cUL 60950 (US & Canada) Recognized, and TUV (EN60950) Certified CE mark meets 73/23/EEC and 93/68/EEC directives Delphi NC40 Series Non-Isolated Point of Load DC/DC Power Modules: 12Vin, 0.9V-5Vout, 40A OPTIONS The Delphi NC40 Series, 12V 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 NC40 series operates from a 12V nominal input, provides up to 40A of power in a vertical or horizontal mounted through-hole package and the output can be resistor- or voltage-trimmed from 0.9Vdc to 5.0Vdc. NC40 series has built-in current sharing control and multiple NC30/NC40 series modules could be paralleled together to provide even higher output currents. NC40 series provides a very cost effective point of load solution. With creative design technology and optimization of component placement, these converters possess outstanding electrical and thermal performance, as well as extremely high reliability under highly stressful operating conditions. Vertical or horizontal versions Negative On/Off logic APPLICATIONS DataCom Distributed power architectures Servers and workstations LAN/WAN applications Data processing applications DATASHEET DS_NC12S40A_02072007 TECHNICAL SPECIFICATIONS (TA=25°C, airflow rate=400LFM, Vin=12Vdc, nominal Vout unless otherwise noted) PARAMETER NOTES and CONDITIONS NC12S0A0V40 Min. ABSOLUTE MAXIMUM RATINGS Input Voltage Operating Temperature Storage Temperature Input/Output Isolation Voltage 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 Off Converter Input Current Input Reflected-Ripple Current Input Voltage Ripple Rejection Output Short-Circuit Input Current OUTPUT CHARACTERISTICS Output Voltage Adjustment Range Output Voltage Set Point Output Voltage Regulation Over Load Over Line Output Voltage Ripple and Noise Peak-to-Peak RMS Output Current Range Output Voltage Over-shoot at Start-up Output Voltage Under-shoot at Power-Off Output DC Current-Limit Inception DYNAMIC CHARACTERISTICS Out Dynamic Load Response Positive Step Change in Output Current Negative Step Change in Output Current Settling Time Turn-On Transient Start-Up Time, From On/Off Control Start-Up Time, From Input Minimum Output Startup Capacitive Load Maximum Output Startup Capacitive Load Minimum Input Capacitance EFFICIENCY Vo=0.9V 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 Logic High Logic Low Remote Sense Range GENERAL SPECIFICATIONS MTBF Weight Over-Temperature Shutdown DS_NC12S40A_02072007 Typ. 0 -40 Non-isolated Max. Units 14 50 125 Vdc °C °C V 13.8 V NA 10.2 12 9.0 8.3 0.7 1 V V V A mA mA mA dB A 0.9 -3.0 5.0 +3.0 V % -1.0 -0.2 +1.0 +0.2 % % 0 50 15 40 1 100 mV mV A % mV A 100% Load, 10.2Vin, 5Vout 23 160 40 150 55 Refer to Figure 35 120 Hz Vin=12V, Io=Io,max, 1% trim resistors Io=Io,min to Io,max Vin=Vin,min to Vin,max 5Hz to 20MHz bandwidth Full Load, 1µF ceramic, 10µF tantalum Full Load, 1µF ceramic, 10µF tantalum Vin=12V, Turn ON Vin=12V, Turn OFF 62 12Vin, 10µF Tan & 1µF Ceramic load cap, 10A/µs 50% Io,max to 75% Io,max 75% Io,max to 50% Io,max Settling to be within regulation band (+/- 3.0%) Io=Io.max Vin=12V, Vo=10% of Vo,set Vo=10% of Vo,set Ex: Three OSCON 6.3V/680µF (ESR 13mΩ max each) Full load Ex: Two OSCON 16V/270µF (ESR 18mΩ max each) 75 75 150 10 30 2040 6120 540 Vin=12V, Io=30A Vin=12V, Io=30A Vin=12V, Io=30A Vin=12V, Io=30A Vin=12V, Io=30A Vin=12V, Io=30A Vin=12V, Io=30A Positive logic (internally pulled high) Module On (or leave the pin open) Module Off Telcordia SR-332 Issue1 Method1 Case3 at 50C Auto restart, refer to Figs 36 & 41 for the measuring point mV mV µs ms ms µF µF µF 75 80 83 85 88 90 92 % % % % % % % 300 KHz 2.4 0 5.5 0.8 400 2.5 37 130 V V mV M hours grams °C 2 90 90 80 80 70 70 60 60 Efficiency (%) Efficiency (%) ELECTRICAL CHARACTERISTICS CURVES 50 40 30 50 40 30 20 20 10.2 10 12 13.8 10.2 10 0 3 5 8 0 11 13 16 19 21 24 27 29 32 35 37 40 3 5 8 Figure 1: Converter efficiency vs. output current (0.9V output voltage) Figure 2: Converter efficiency vs. output current (1.2V output voltage) 100 90 90 80 80 70 70 Efficiency (%) 100 60 50 40 30 60 50 40 30 20 20 10.2 10 12 11 13 16 19 21 24 27 29 32 35 37 40 Output Current (A) Output Current (A) Efficiency (%) 13.8 0 0 13.8 10.2 10 12 13.8 0 0 0 3 5 8 0 11 13 16 19 21 24 27 29 32 35 37 40 3 5 8 Figure 3: Converter efficiency vs. output current (1.5V output voltage) Figure 4: Converter efficiency vs. output current (1.8V output voltage) 100 90 90 80 80 70 70 Efficiency (%) 100 60 50 40 30 20 10.2 10 12 11 13 16 19 21 24 27 29 32 35 37 40 Output Current (A) Output Current (A) Efficiency (%) 12 13.8 60 50 40 30 20 10.2 10 12 13.8 0 0 0 3 5 8 11 13 16 19 21 24 27 29 32 35 37 40 Output Current (A) Figure 5: Converter efficiency vs. output current (2.5V output voltage) DS_NC12S40A_02072007 0 3 5 8 11 13 16 19 21 24 27 29 32 35 37 40 Output Current (A) Figure 6: Converter efficiency vs. output current (3.3V output voltage) 3 ELECTRICAL CHARACTERISTICS CURVES (CON.) 100 90 Efficiency (%) 80 70 60 50 40 30 20 10.2 10 12 13.8 0 0 3 5 8 11 13 16 19 21 24 27 29 32 35 37 40 Output Current (A) Figure 7: Converter efficiency vs. output current (5V output voltage) Figure 8: Output ripple & noise at 12Vin, 0.9V/40A out Figure 9: Output ripple & noise at 12Vin, 1.2V/40A out Figure 10: Output ripple & noise at 12Vin, 1.5V/40A out Figure 11: Output ripple & noise at 12Vin, 1.8V/40A out Figure 12: Output ripple & noise at 12Vin, 2.5V/40A out DS_NC12S40A_02072007 4 ELECTRICAL CHARACTERISTICS CURVES (CON.) Figure 13: Output ripple & noise at 12Vin, 3.3V/40A out Figure 14: Output ripple & noise at 12Vin, 5V/40A out Figure 15: Turn on delay time at 12Vin, 0.9V/40A out Ch2:Vin Ch3:Vout Ch4:PWRGD Figure 16: Turn on delay time Remote On/Off, 0.9V/40A out Ch2:ENABLE Ch3:Vout Ch4:PWRGD Figure 17: Turn on delay time at 12Vin, 5V/40A out Ch2:Vin Ch3:Vout Ch4:PWRGD Figure 18: Turn on delay time Remote On/Off, 5V/40A out Ch2: ENABLE Ch3:Vout Ch4:PWRGD DS_NC12S40A_02072007 5 ELECTRICAL CHARACTERISTICS CURVES (CON.) Figure 19: Typical transient response to step load change at 10A/µS from 50% to 75% and 75% to 50% of Io, max at 12Vin, 1.2V out Figure 20: Typical transient response to step load change at 10A/µS from 50% to 75% and 75% to 50% of Io, max at 12Vin, 1.5V out Figure 21: Typical transient response to step load change at 10A/µS from 50% to 75% and 75% to 50% of Io, max at 12Vin, 1.8V out Figure 22: Typical transient response to step load change at 10A/µS from 50% to 75% and 75% to 50% of Io, max at 12Vin, 2.5V out Figure 23: Typical transient response to step load change at 10A/µS from 50% to 75% and 75% to 50% of Io, max at 12Vin, 3.3V out Figure 24: Typical transient response to step load change at 10A/µS from 50% to 75% and 75% to 50% of Io, max at 12Vin, 5.0V out DS_NC12S40A_02072007 6 DESIGN CONSIDERATIONS The NC40 is designed using two-phase synchronous buck topology. Block diagram of the converter is shown in Figure 25. The output can be trimmed in the range of 0.9Vdc to 5.0Vdc by a resistor from trim pin to ground. A remote sense function is provided and it is able to compensate for a drop from the output of converter to point of load. The converter can be turned ON/OFF by remote control. Positive on/off (ENABLE pin) logic implies that the converter DC output is enabled when this signal is driven high (greater than 2.4V) or floating and disabled when the signal is driven low (below 0.8V). Negative on/off logic is optional and could also be ordered. The converter provides an open collector signal called Power Good. The power good signal is pulled low when output is not within ±10% of Vout or Enable is OFF. The converter can protect itself by entering hiccup mode against over current and short circuit condition. Also, the converter will shut down when an over voltage protection is detected. FEATURES DESCRIPTIONS ENABLE (On/Off) The ENABLE (on/off) input allows external circuitry to put the NC converter into a low power dissipation (sleep) mode. Positive (active-high) ENABLE is available as standard. Positive ENABLE (active-high) units of the NC series are turned on if the ENABLE pin is high or floating. Pulling the pin low will turn off the unit. With the active high function, the output is guaranteed to turn on if the ENABLE pin is driven above 2.4V. The output will turn off if the ENABLE pin voltage is pulled below .8V. The ENABLE input can be driven in a variety of ways as shown in Figures 26, 27 and 28. If the ENABLE signal comes from the primary side of the circuit, the ENABLE can be driven through either a bipolar signal transistor (Figure 26) or a logic gate (Figure 27). If the enable signal comes from the secondary side, then an opto-coupler or other isolation devices must be used to bring the signal across the voltage isolation (please see Figure 28). NC30/NC40 Vin The converter has an over temperature protection which can protect itself by shutting down for an over temperature event. There is a thermal hysteresis of typically 30℃ Vout Enable Trim Ground Ground Figure 26: Enable Input drive circuit for NC series 5V NC30/NC40 Vin Vout Enable Trim Ground Ground Figure 27: Enable input drive circuit using logic gate. Figure 25: Block Diagram NC30/NC40 Safety Considerations Vin Enable It is recommended that the user to provide two 12A very fast-acting type fuses (Little fuse R451 012) in parallel in the input line for safety. Ground Vout Trim Ground Figure 28: Enable input drive circuit example with isolation. DS_NC12S40A_02072007 7 FEATURES DESCRIPTIONS (CON.) Over Temperature Protection (OTP) Input Under-Voltage Lockout To provide additional over-temperature protection in a fault condition, the unit is equipped with a non-latching thermal shutdown circuit. The shutdown circuit engages when the temperature of monitored component exceeds approximately 130℃. The unit will cycle on and off while the fault condition exists. The unit will recover from shutdown when the cause of the over temperature condition is removed. The input under-voltage lockout prevents the converter from being damaged while operating when the input voltage is too low. The lockout occurs between 7.7V to 8.6V. Over-Current and Short-Circuit Protection The NC series modules have non-latching over-current and short-circuit protection circuitry. When over current condition occurs, the module goes into the non-latching hiccup mode. When the over-current condition is removed, the module will resume normal operation. An over current condition is detected by measuring the voltage drop across the high-side MOSFET. The voltage drop across the MOSFET is also a function of the MOSFET’s Rds(on). Rds(on) is affected by temperature, therefore ambient temperature will affect the current limit inception point. The unit will not be damaged in an over current condition because it will be protected by the over temperature protection. Remote Sense Over Voltage Protection (OVP) The converter will shut down when an output over voltage is detected. Once the OVP condition is detected, the controller will stop all PWM outputs and will turn on low-side MOSFET driver to prevent any damage to load. Current Sharing (optional) The parallel operation of multiple converters is available with the NC30/NC40 (option code B). The converters will current share to be within +/- 10% of each other. In addition to connect the I-Share pin together for the current sharing operation, the remote sense lines of the paralleled units must be connected at the same point for proper operation. Also, units are intended to be turned on/enabled at the same time. Hot plugging is not recommended. The current sharing diagram show in Figure 30. The NC30/NC40 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 0.4V of loss. The remote sense connects as shown in Figures 29. NC30A/40A Vout +SENSE Cout -SENSE GROUND I-SHARE o VIN LOAD TRIM Vo +SENSE NC30A/40A 0 o Vout +SENSE GROUND Rload Cout -SENSE -SENSE GROUND GROUND I-SHARE Contact and Distribution Losses TRIM Figure 29: Circuit configuration for remote sense 0 Figure 30: NC30/NC40 Current Sharing Diagram DS_NC12S40A_02072007 D S_NC12S40A_02072007 8 FEATURES DESCRIPTIONS (CON.) To use voltage trim, the trim equation for the NC30 is (please refer to Fig. 33) : Output Voltage Programming The output voltage of the NC series is trimmable by connecting an external resistor between the trim pin and output ground as shown Figure 31 and the typical trim resistor values are shown in Figure 32. The output can also be set by an external voltage connected to trim pin as shown in Figure 32. The NC30A/40A module has a trim range of 0.9V to 5.0V. A plot of trim behavior is shown in Figure 33 Rt (kΩ) = Rs (13.1Vt + Vout − 12.69) 0.9 Rs − Vout ( Rs + 1) + 12.69 Vout is the desired output voltage Vt is the external trim voltage Rs is the resistance between Trim and Ground (in KΩ) Rt is the resistor to be defined with the trim voltage (in KΩ) Below is an example about using this voltage trim equation : Example： +SENSE Vout Cout GROUND -SENSE If Vt = 1.25V, desired Vout = 2.5V and Rs = 1 kΩ Rt (kΩ) = Rs Rs(13.1Vt + Vout − 12.69) = 0.72kΩ 0.9 Rs − Vout ( Rs + 1) + 12.69 TRIM Power Good Figure 31: Trimming Output Voltage The NC30/NC40 modules have a trim range of 0.9V to 5.0V. The trim resistor equation for the them is : Rs (kΩ) = 12.69 − Vout Vout − 0.9 Vout is the desired voltage setpoint, Rs is the trim resistance between TRIM and Ground, Rs values should not be less than 1.8 kΩ Output Voltage +0.9 V +1.2 V +1.5 V +1.8 V +2.5 V +3.3 V +5.0 V Rs(Ω) OPEN 38.3K 18.7K 12.1K 6.34K 3.92K 1.87K The converter provides an open collector signal called Power Good. This output pin uses positive logic and is open collector. This power good output is able to sink 5mA and set high when the output is within ±10% of output set point. The power good signal is pulled low when output is not within ±10% of Vout or Enable is OFF. Output Capacitance There is no output capacitor on the NC series modules. Hence, an external output capacitor is required for stable operation. For NC40 modules, two external 6.3V/680µF output low ESR capacitors in parallel (for example, OSCON) are required for stable operation. It is important to places these low ESR capacitors as close to the load as possible in order to get improved dynamic response and better voltage regulation, especially when the load current is large. Several of these low ESR capacitors could be used together to further lower the ESR. Figure 32: Typical trim resistor values Please refer to individual datasheet for the maximum allowed start-up load capacitance for each NC series as it is varied between series. +SENSE Vout Cout GROUND -SENSE Rs TRIM Vt Rt Figure 33: Output voltage trim with voltage source DS_NC12S40A_02072007 9 FEATURES DESCRIPTIONS (CON.) THERMAL CONSIDERATION Voltage Margining 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. Output voltage margining can be implemented in the NC30/NC40 modules by connecting a resistor, R margin-up, from the Trim pin to the ground pin for margining up the output voltage. Also, the output voltage can be adjusted lower by connecting a resistor, Rmargin-down, from the Trim pin to the output pin. Figure 34 shows the circuit configuration for output voltage margining adjustment. Hence, the choice of equipment to characterize the thermal performance of the power module is a wind tunnel. Vt Thermal Testing Setup +SENSE Vout Rmargin-down 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. Cout GROUND -SENSE Rs TRIM Rmargin-up 0 Figure 34: Circuit configuration for output voltage margining Reflected Ripple Current and Output Ripple and Noise Measurement The measurement set-up outlined in Figure 35 has been used for both input reflected/ terminal ripple current and output voltage ripple and noise measurements on NC series converters. 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. 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. The maximum acceptable temperature measured at the thermal reference point is 125℃. This is shown in Figure 36 &41. Cs=270uF*1 Ltest=1.4uH Cin=270uF*2 Cout=680uF*3 Figure 35: Input reflected ripple/ capacitor ripple current and output voltage ripple and noise measurement setup for NC40 DS_NC12S40A_02072007 10 THERMAL CURVES (NC12S0A0V40) NC12S0A0V40(Standard) Output Current vs. Ambient Temperature and Air Velocity @ Vout = 3.3V(Either Orientation) Test Section for NC12S0A0V40 Output Current(A) 45 PWB FACING PWB 40 35 MODULE 30 25 Natural Convection 20 AIR VELOCITY AND AMBIENT TEMPERATURE MEASURED BELOW THE MODULE 100LFM 200LFM 15 50.8 (2.0”) AIR FLOW 300LFM 400LFM 10 500LFM 600LFM 5 0 25 19 (0.75”) 38 (1.5”) Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches) 35 45 55 65 75 85 Ambient Temperature (℃) Figure 38: Output current vs. ambient temperature and air velocity@ Vout=3.3V(Either Orientation) NC12S0A0V40(Standard) Output Current vs. Ambient Temperature and Air Velocity @ Vout = 1.5V(Either Orientation) 45 Output Current(A) 40 35 30 25 Natural Convection 20 100LFM 200LFM 15 300LFM 400LFM 10 500LFM 600LFM 5 0 25 Figure 36: Temperature measurement location * The allowed maximum hot spot temperature is defined at 125℃ 35 45 55 65 75 85 Ambient Temperature (℃) Figure 39: Output current vs. ambient temperature and air velocity@ Vout=1.5V(Either Orientation) NC12S0A0V40(Standard) Output Current vs. Ambient Temperature and Air Velocity @ Vout = 0.9V(Either Orientation) NC12S0A0V40(Standard) Output Current vs. Ambient Temperature and Air Velocity @ Vout = 5V(Either Orientation) Output Current(A) Output Current(A) 45 45 40 40 35 35 30 30 25 25 Natural Convection 20 200LFM 15 400LFM 300LFM 400LFM 10 500LFM 600LFM 5 100LFM 200LFM 15 300LFM 10 Natural Convection 20 100LFM 500LFM 600LFM 5 0 0 25 35 45 55 65 75 85 Ambient Temperature (℃) Figure 37: Output current vs. ambient temperature and air velocity@ Vout=5V(Either Orientation) DS_NC12S40A_02072007 25 35 45 55 65 75 85 Ambient Temperature (℃) Figure 40: Output current vs. ambient temperature and air velocity@ Vout=0.9V(Either Orientation) 11 THERMAL CURVES (NC12S0A0H40) Test Section for NC12S0A0H40 NC12S0A0H40(Standard) Output Current vs. Ambient Temperature and Air Velocity @ Vout = 3.3V(Either Orientation) Output Current(A) 45 40 PWB FACING PWB 35 MODULE 30 25 Natural Convection 20 AIR VELOCITY AND AMBIENT TEMPERATURE MEASURED BELOW THE MODULE 100LFM 15 50.8 (2.0”) 200LFM 300LFM 10 400LFM 500LFM 5 AIR FLOW 600LFM 0 25 9.5 (0.38”) 19 (0.75”) Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches) 35 45 55 65 75 85 Ambient Temperature (℃) Figure 43: Output current vs. ambient temperature and air velocity@ Vout=3.3V(Either Orientation) NC12S0A0H40(Standard) Output Current vs. Ambient Temperature and Air Velocity @ Vout =1. 5V(Either Orientation) Output Current(A) 45 40 35 30 25 Natural Convection 20 100LFM 15 200LFM 300LFM 10 400LFM 500LFM 5 600LFM 0 25 Figure 41: Temperature measurement location * The allowed maximum hot spot temperature is defined at 125℃ 45 NC12S0A0H40(Standard) Output Current vs. Ambient Temperature and Air Velocity @ Vout = 5V(Either Orientation) Output Current(A) 45 55 65 75 85 Ambient Temperature (℃) Figure 44: Output current vs. ambient temperature and air velocity@ Vout=1.5V(Either Orientation) 45 40 40 35 35 30 30 25 35 NC12S0A0H40(Standard) Output Current vs. Ambient Temperature and Air Velocity @ Vout = 0.9V(Either Orientation) Output Current(A) 25 Natural Convection 20 Natural Convection 20 100LFM 15 100LFM 15 200LFM 200LFM 300LFM 10 400LFM 300LFM 10 400LFM 500LFM 5 600LFM 500LFM 5 600LFM 0 25 35 45 55 65 75 85 Ambient Temperature (℃) Figure 42: Output current vs. ambient temperature and air velocity@ Vout=5V(Either Orientation) DS_NC12S40A_02072007 0 25 35 45 55 65 75 85 Ambient Temperature (℃) Figure 45: Output current vs. ambient temperature and air velocity@ Vout=0.9V(Either Orientation) 12 MECHANICAL DRAWING VERTICAL DS_NC12S40A_02072007 HORIZONTAL 13 PART NUMBERING SYSTEM NC 12 S 0A0 V 40 P N Product Series Input Voltage Number of outputs Output Voltage Mounting Output Current ON/OFF Logic Pin Length NC- 12- Non-isolated 10.2~13.8V output S- Single 0A0- H- 40- 40A programmable Horizontal Converter P- Positive R- 0.118” N- Negative N- 0.140” F A Option Code F- RoHS 6/6 (Lead Free) A- Standard Functions V- Vertical MODEL LIST Model Name Output Current Efficiency 12Vin @ 100% load Packaging Input Voltage Output Voltage NC12S0A0V40PNFA Vertical 10.2 ~ 13.8Vdc 0.9 V ~ 5.0Vdc 40A 92% (5.0V) NC12S0A0H40PNFA Horizontal 10.2 ~ 13.8Vdc 0.9 V ~ 5.0Vdc 40A 92% (5.0V) CONTACT: www.delta.com.tw/dcdc USA: Telephone: East Coast: (888) 335 8201 West Coast: (888) 335 8208 Fax: (978) 656 3964 Email: [email protected] Europe: Telephone: +41 31 998 53 11 Fax: +41 31 998 53 53 Email: [email protected] Asia & the rest of world: Telephone: +886 3 4526107 x6220 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_NC12S40A_02072007 14