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FEATURES
High Efficiency: 91% @ 12Vin, 5V/6A out Size: 30.5x15.5x11.7mm (1.20"x0.61"x0.46") -- Vertical 30.5x15.5x12.3mm (1.20"x0.61"x0.48") -- Horizontal 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, OCP, SCP Power good output signal Remote ON/OFF ISO 9001, TL 9000, ISO 14001, QS9000, OHSAS 18001 certified manufacturing facility UL/cUL 60950 (US & Canada) Recognized, and TUV (EN60950) Certified
Delphi NC06 Series Non-Isolated Point of Load DC/DC Power Modules: 12Vin, 0.9V~5.0Vout, 6A
The Delphi NC06 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 NC06 series operates from a 12V nominal input, provides up to 6A 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. It 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.
OPTIONS
Vertical or horizontal versions
APPLICATIONS
DataCom Distributed power architectures Servers and workstations LAN/WAN applications Data processing applications
DATASHEET DS_NC12S06A_02072007
TECHNICAL SPECIFICATIONS
(Ambient Temperature=25C, minimum airflow=200LFM, nominal Vin=12Vdc unless otherwise specified.)
PARAMETER
ABSOLUTE MAXIMUM RATINGS Input Voltage Operating Temperature (Vertical) Operating Temperature (Horizontal) 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 Ripple Rejection 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 Output Short-Circuit Current DYNAMIC CHARACTERISTICS Output 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 power Minimum Output Capacitance Maximum Output Startup Capacive 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 GENERAL SPECIFICATIONS MTBF Weight
NOTES and CONDITIONS
Min.
With appropriate air flow and derating, see Figs 33 With appropriate air flow and derating, see Figs 39 Non-isolated 10.2 -40 -40 -40
NC12S0A0V/H06
Typ. Max.
14 130 125 125 NA 12.0 9.4 8.1 1.3 13.8
Units
Vdc C C C V V V V V A mA mA mA dB V % % % mV mV A % mV A
100% Load, 10.2Vin, 5.0Vout Vin=12V, Vout=5V Remote OFF Refer to Figure 31. 120Hz 0.9 -3 -1.0 -0.2 0.9V-2.5V 3.3V-5.0V 0 Vin=12V, Turn ON Vin=12V, Turn OFF Hiccup mode Hiccup mode 12Vin, 100nF ceramic, 10F tantalum load cap, 10A/s 50% Io_max to 75% Io_max 75% Io_max to 50% Io_max Settling to be within regulation band (Vo +/- 2.5%) From Enable high to 10% of Vo From Vin=12V to 10% of Vo Ex: OSCON 6.3V/680F (ESR 13 m max.) Full Load Ex: OSCON 16V/270F (ESR 18 m max.) Vin=12V, Io=6A Vin=12V, Io=6A Vin=12V, Io=6A Vin=12V, Io=6A Vin=12V, Io=6A Vin=12V, Io=6A Vin=12V, Io=6A Fixed Positive logic (internally pulled high) Module On (or leave the pin open) Module Off Telcordia SR-332 Issue1 Method1 Case3 at 50C 7
3.27 56 14 60 60 5.0 +3 +1.0 +0.2 40 50 20 6 1 100
With a 1.0% trim resistor Io=Io_min to Io_max Vin=Vin_min to Vin_max 5Hz to 20MHz bandwidth Full Load, 100nF ceramic, 10F tantalum Full Load, 100nF ceramic, 10F tantalum
75 75 200 10 10 680 TBD 270 71 76 79 81 85 88 91 300 2.4 0 1.7 7.1 5.5 0.8
mV mV s ms ms F F F % % % % % % KHz V V M hours grams
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ELECTRICAL CHARACTERISTICS CURVES
90 80 70 60 50 40 30 20 10 0 0.0 1.0 2.0
10.2
12
13.8
90 80 70 60 50 40 30 20 10 0 0.0 1.0
Efficiency (%)
Efficiency (%)
10.2
12
13.8
3.0
4.0
5.0
6.0
2.0
3.0
4.0
5.0
6.0
Output Current (A)
Output Current (A)
Figure 1: Converter efficiency vs. output current (0.9V output voltage)
Figure 2: Converter efficiency vs. output current (1.2V output voltage)
90 80 70 60 50 40 30 20 10 0 0.0 1.0 2.0
100
Efficiency (%)
Efficiency (%)
80 60 40 20 0 10.2 12 13.8
10.2
12
13.8
3.0
4.0
5.0
6.0
0.0
1.0
2.0
3.0
4.0
5.0
6.0
Output Current (A)
Output Current (A)
Figure 3: Converter efficiency vs. output current (1.8V output voltage)
Figure 4: Converter efficiency vs. output current (2.5V output voltage)
100 80 Efficiency (%) 60 40 20 0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 Output Current (A)
Figure 5: Converter efficiency vs. output current (3.3V output voltage)
10.2
12
13.8
100 90 80 70 60 50 40 30 20 10 0 0.0 1.0 2.0
Efficiency (%)
10.2
12
13.8
3.0
4.0
5.0
6.0
Output Current (A)
Figure 6: Converter efficiency vs. output current (5.0V output voltage)
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ELECTRICAL CHARACTERISTICS CURVES (CON.)
Figure 7: Output ripple & noise at 12Vin, 0.9V/6A out
Figure 8: Output ripple & noise at 12Vin, 1.2V/6A out
Figure 9: Output ripple & noise at 12Vin, 1.8V/6A out
Figure 10: Output ripple & noise at 12Vin, 2.5V/6A out
Figure 11: Output ripple & noise at 12Vin, 3.3V/6A out
Figure 12: Output ripple & noise at 12Vin, 5.0V/6A out
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ELECTRICAL CHARACTERISTICS CURVES (CON.)
Figure 13: Turn on delay time at 12Vin, 0.9V/6A out Ch2: Vin Ch3: Vout Ch4: PWRGD
Figure 14: Turn on delay time Remote On/Off, 0.9V/6A out Ch2: ENABLE Ch3: Vout Ch4: PWRGD
Figure 15: Turn on delay time at 12Vin, 2.5V/6A out Ch2: Vin Ch3: Vout Ch4: PWRGD
Figure 16: Turn on delay time at Remote On/Off, 2.5V/6A out Ch2: ENABLE Ch3: Vout Ch4: PWRGD
Figure 17: Turn on delay time at 12Vin, 5.0V/6A out Ch2: Vin Ch3: Vout Ch4: PWRGD
Figure 18: Turn on delay time at Remote On/Off, 5.0V/6A out Ch2: ENABLE Ch3: Vout Ch4: PWRGD
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ELECTRICAL CHARACTERISTICS CURVES (CON.)
Figure 19: Typical transient response to step load change at 10A/S from 50% to 75% and 75% to 50% of Io_max at 12Vin, 0.9V out
Figure 20: Typical transient response to step load change at 10A/S from 50% to 75% and 75% to 50% of Io_max at 12Vin, 1.2V out
Figure 21: Typical transient response to step load change at 10A/S from 50% to 75% and 75% to 50% of Io_max at 12Vin, 2.5V out
Figure 22: Typical transient response to step load change at 10A/S from 50% to 75% and 75% to 50% of Io_max at 12Vin, 5.0V out
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DESIGN CONSIDERATIONS
The NC06 is a single phase and voltage mode controlled Buck topology. Block diagram of the converter is shown in Figure 23. The output can be trimmed in the range of 0.9Vdc to 5.0Vdc by a resistor from Trim pin to Ground. 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 24, 25 and 26. If the ENABLE signal comes from the primary side of the circuit, the ENABLE can be driven through either a bipolar signal transistor (Figure 24) or a logic gate (Figure 25). 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 26).
NC6A/15A/20A
Vin Enable Vout
Trim
Ground
Ground
Figure 23: Block Diagram
Figure 24: Enable Input drive circuit for NC series
5V
NC6A/15A/20A
Vin Enable Vout
Safety Considerations
It is recommended that the user to provide a very fast-acting type fuse in the input line for safety. The output voltage set-point and the output current in the application could define the amperage rating of the fuse.
Trim
Ground
Ground
Figure 25: Enable input drive circuit using logic gate.
NC6A/15A/20A
Vin Enable Vout
Trim
Ground
Ground
Figure 26: Enable input drive circuit example with isolation.
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FEATURES DESCRIPTIONS (CON.)
Input Under-Voltage Lockout
The input under-voltage lockout prevents the converter from being damaged while operating when the input voltage is too low. The lockout occurs between 7.6V to 8.6V.
The NC06/NC15/NC20 module has a trim range of 0.9V to 5.0V. The trim resistor equation for the NC6A/NC15A/ NC20A is :
Rs () =
1170 Vout - 0.9
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. Please see the electrical characteristics for details of the OCP function. The detection of the Rds(on) of the high side MOSFET also acts as an over temperature protection since high temperature will cause the Rds(on) of the MOSFET to increase, eventually triggering over-current protection.
Vout is the output voltage setpoint Rs is the resistance between Trim and Ground Rs values should not be less than 280
Output Voltage Rs ()
+0.9 V +1.2 V +1.5 V +1.8 V +2.5 V +3.3 V +5.0 V
OPEN 3.92K 1.96K 1.3K 732 487 287
Figure 28: Typical trim resistor values
NC6A/15A/20A
Vout Vin
1.3K
Enable
Trim
Rs
Rt
Vt
Over Voltage Protection (OVP)
The converter will shut down when an over voltage protection is detected. Once the OVP condition is detected, controller will stop all PWM outputs and turn on low-side MOSFET to prevent any damage to load.
Ground
Ground
Figure 29: Output voltage trim with voltage source
To use voltage trim, the trim equation for the NC6A/NC15A/ NC20A is (please refer to Fig. 29) :
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 27 and the typical trim resistor values are shown in Figure 28. The output can also be set by an external voltage connected to trim pin as shown in Figure 29.
NC6A/15A/20A
Vin Vout
Rt (k) =
Rs(1.3Vt - 1.17) 1.17 - Rs(Vout - 0.9)
Vout is the desired output voltage Vt is the external trim voltage Rs is the resistance between Trim and Ground (in K) Rt is the resistor to be defined with the trim voltage (in K) Below is an example about using this voltage trim equation : Example
Enable
Trim
Rs
Ground Ground
If Vt = 1.25V, desired Vout = 2.5V and Rs = 0.715K
Rt ( K) =
Figure 27: Trimming Output Voltage
Rs(1.3Vt - 1.17) = 12.51K 1.17 - Rs(Vout - 0.9)
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FEATURES DESCRIPTIONS (CON.)
Power Good
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 NC15 modules, an external 6.3V/680F low ESR capacitor (for example, OSCON) is 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. Please refer to individual datasheet for the maximum allowed start-up load capacitance for each NC series as it is varied between series.
Current Sink Capability
The NC series converters are able to sink current as well as function as a current source. It is able to sink the full output current at any output voltage up to and including 2.5V. This feature allows the NC series fit into any voltage termination application.
Reflected Ripple Current and Output Ripple and Noise Measurement
The measurement set-up outlined in Figure 31 has been used for both input reflected/ terminal ripple current and output voltage ripple and noise measurements on NC series converters.
Voltage Margining Adjustment
Output voltage margin adjusting can be implemented in the NC modules by connecting a resistor, Rmargin-up, from the Trim pin to the Ground 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 voltage source Vt. Figure 30 shows the circuit configuration for output voltage margining adjustment.
Vt
NC6A/15A/20A
Vin Vout
Rmargin-down
Enable
Trim
Rmargin-up
Rs
Ground
Ground
Cs=270F*1, Ltest=1.4H, Cin=270F*1, Cout=680F *1
Figure 31: Input reflected ripple/ capacitor ripple current and output voltage ripple and noise measurement setup for NC06
Figure 30: Circuit configuration for output voltage margining
Paralleling
NC06/NC15/NC20 converters do not have built-in current sharing (paralleling) ability. Hence, paralleling of multiple NC06/NC15/NC20 converters is not recommended.
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THERMAL CONSIDERATION
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 space between the neighboring PWB and the top of the power module is constantly kept at 6.35mm (0.25'').
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.
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THERMAL CURVES (NC12S0A0V06)
FACING PWB PWB
7 Output Current(A)
NC12S0A0V06 (Standard) Output Current vs. Ambient Temperature and Air Velocity @ Vout = 3.3V (Either Orientation)
MODULE
6
5
AIR VELOCITY AND AMBIENT TEMPERATURE MEASURED BELOW THE MODULE
AIR FLOW
4
Natural Convection
100LFM
50.8 (2.0")
3
200LFM 300LFM
2
400LFM
1
11 (0.43") 22 (0.87")
0 50 55 60 65 70 75 80 85 Ambient Temperature ()
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches) Figure 32: Wind tunnel test setup
Figure 35: Output current vs. ambient temperature and air velocity@ Vout=3.3V(Either Orientation)
7 Output Current(A)
NC12S0A0V06 (Standard) Output Current vs. Ambient Temperature and Air Velocity @ Vout = 1.8V (Either Orientation)
6
5
4
Natural Convection
100LFM
3
200LFM 300LFM
2
1
0 50 55 60 65 70 75 80 85 Ambient Temperature ()
Figure 33: Temperature measurement location * The allowed maximum hot spot temperature is defined at 130
7 Output Current(A)
Figure 36: Output current vs. ambient temperature and air velocity@ Vout=1.8V(Either Orientation)
7 Output Current(A)
NC12S0A0V06 (Standard) Output Current vs. Ambient Temperature and Air Velocity @ Vout = 5V (Either Orientation)
NC12S0A0V06 (Standard) Output Current vs. Ambient Temperature and Air Velocity @ Vout =0.9V (Either Orientation)
6
6
5
5
4
Natural Convection
100LFM
4
Natural Convection
100LFM
3
3
200LFM 300LFM
2
200LFM
2
400LFM 500LFM
1
1
0 50 55 60 65 70 75 80 85 Ambient Temperature ()
0 50 55 60 65 70 75 80 85 Ambient Temperature ()
Figure 34: Output current vs. ambient temperature and air velocity @Vout=5V(Either Orientation)
Figure 37: Output current vs. ambient temperature and air velocity@ Vout=0.9V(Either Orientation)
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THERMAL CURVES (NC12S0A0H06)
FACING PWB PWB
7 Output Current(A)
NC12S0A0H06 (Standard) Output Current vs. Ambient Temperature and Air Velocity @ Vout = 3.3V (Either Orientation)
MODULE
6
5
AIR VELOCITY AND AMBIENT TEMPERATURE MEASURED BELOW THE MODULE
AIR FLOW
4
Natural Convection
100LFM
50.8 (2.0")
3
200LFM 300LFM
2
400LFM
9 (0.35") 18 (0.71")
1
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches) Figure 38: Wind tunnel test setup
0 40 45 50 55 60 65 70 75 80 85 Ambient Temperature ()
Figure 41: Output current vs. ambient temperature and air velocity@ Vout=3.3V(Either Orientation)
7 Output Current(A)
NC12S0A0H06 (Standard) Output Current vs. Ambient Temperature and Air Velocity @ Vout = 1.8V (Either Orientation)
6
5
4
Natural Convection
100LFM
3
200LFM 300LFM
2
1
0 40 45 50 55 60 65 70 75 80 85 Ambient Temperature ()
Figure 39: Temperature measurement location * The allowed maximum hot spot temperature is defined at 125
7 Output Current(A)
Figure 42: Output current vs. ambient temperature and air velocity@ Vout=1.8V(Either Orientation)
7 Output Current(A)
NC12S0A0H06 (Standard) Output Current vs. Ambient Temperature and Air Velocity @ Vout = 5V (Either Orientation)
NC12S0A0H06 (Standard) Output Current vs. Ambient Temperature and Air Velocity @ Vout = 0.9V (Either Orientation)
6
6
5
5
4
Natural Convection
100LFM
4
Natural Convection
100LFM
3
200LFM 300LFM
2
3
200LFM
2
400LFM 500LFM
1
1
0 40 45 50 55 60 65 70 75 80 85 Ambient Temperature ()
0 40 45 50 55 60 65 70 75 80 85 Ambient Temperature ()
Figure 40: Output current vs. ambient temperature and air velocity @Vout=5V(Either Orientation)
Figure 43: Output current vs. ambient temperature and air velocity@ Vout=0.9V(Either Orientation)
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MECHANICAL DRAWING
VERTICAL HORIZONTAL
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PART NUMBERING SYSTEM
NC
Product Series
NCNon-isolated Converter
12
Input Voltage
12-
S
Number of outputs
S- Single
0A0
Output Voltage
0A0 programmable
V
Mounting
H- Horizontal V- Vertical
06
Output Current
06- 6A
P
ON/OFF Logic
N
Pin Length
F
A
Option Code
P- Positive N- 0.14"
F- RoHS 6/6 A- standard function
10.2~13.8V output
N- Negative R- 0.118" (Lead Free)
MODEL LIST
Model Name
NC12S0A0V06PNFA NC12S0A0H06PNFA
Packaging
Vertical Horizontal
Input Voltage
10.2 ~ 13.8Vdc 10.2 ~ 13.8Vdc
Output Voltage
0.9 V ~ 5.0Vdc 0.9 V ~ 5.0Vdc
Output Current
6A 6A
Efficiency 12Vin @ 100% load
91% (5.0V) 91% (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: DCDC@delta-corp.com Europe: Telephone: +41 31 998 53 11 Fax: +41 31 998 53 53 Email: DCDC@delta-es.tw Asia & the rest of world: Telephone: +886 3 4526107 ext. 6220 Fax: +886 3 4513485 Email: DCDC@delta.com.twT
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.
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