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FEATURES
High Efficiency: 94.0% @ 12Vin, 5V/10A out Size: 10.4mm x 16.5mm x 11.0 mm (0.41"x0.65"x0.43") Wide input range: 3.0V~13.8V Output voltage programmable from 0.59Vdc to 5.1Vdc via external resistors No minimum load required Fixed frequency operation Input UVLO, output OCP Remote ON/OFF (Positive, 5pin version) ISO 9001, TL 9000, ISO 14001, QS9000, OHSAS18001 certified manufacturing facility UL/cUL 60950 (US & Canada), TUV (EN60950) --pending
Delphi NE Series Non-Isolated Point of Load
www..com
DC/DC Modules: 3.0~13.8Vin, 0.59V-5.1Vout, 10Aout
OPTIONS
The Delphi NE 10A Series, 3.0~13.8V wide input, wide trim single output, non-isolated point of load (POL) DC/DC converters are the latest offering from a world leader in power systems technology and manufacturing -- Delta Electronics, Inc. The NE product family is the second generation, non-isolated point-of-load DC/DC power modules for the datacom applications which cut the module size by almost 50% in most of the cases compared to the first generation NC series POL modules. The NE 10A product family provides an ultra wide input range to support 3.3V, 5V, 8V, 9.6V, and 12V bus voltage point-of-load applications and it offers up to 10A of output current in a vertically or horizontally mounted through-hole miniature package and the output can be resistor trimmed from 0.59Vdc to 5.1Vdc. It provides a very cost effective, high efficiency, and high density 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
APPLICATIONS
DataCom Distributed power architectures Servers and workstations LAN/WAN applications Data processing applications
DATASHEET DS_NE12S10A_02012007
TECHNICAL SPECIFICATIONS
(Ambient Temperature=25C, minimum airflow=200LFM, nominal Vin=12Vdc unless otherwise specified.)
PARAMETER
ABSOLUTE MAXIMUM RATINGS Input Voltage Operating Temperature (Vertical) 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 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 Over temperature Total output range Output Voltage Ripple and Noise Peak-to-Peak Peak-to-Peak Peak-to-Peak 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 RMS value 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 Capacitive Load EFFICIENCY Vo=0.59V Vo=0.9V Vo=2.5V Vo=5.0V SINK EFFICIENCY Vo=5.0V FEATURE CHARACTERISTICS Switching Frequency ON/OFF Control Logic High Logic Low GENERAL SPECIFICATIONS Calculated MTBF Weight
NOTES and CONDITIONS
Min.
Refer to Fig.25 for the measuring point 3.0 0 -55 3.0
NE12S0A0V/H10
Typ. Max.
13.8 109 125 13.8 3.1 2.8 0.3 4.5 80 10 5 60 0.59 -1 0.5 0.2 0.3 -3 10 15 30 60 10 0 10 0.5 100 200 4
Units
Vdc C C V V V V A mA mA mA dB V % % % % % mV mV mV mV mV A % mV %Iomax Arms
12Vin, 5Vo, operating, full load Vin=12V, Vout=5V Remote OFF 120Hz
10
With a 0.1% trim resistor Io=Io_min to Io_max Vin=Vin_min to Vin_max Ta=0~70C Over load, line, temperature regulation and set point 5Hz to 20MHz bandwidth Full Load, 10uF Tan cap, 12Vin, 0.5Vo Full Load, 10uF Tan cap, 12Vin, 0.9Vo Full Load, 10uF Tan cap, 12Vin, 2.5Vo Full Load, 10uF Tan cap, 12Vin, 5Vo Full Load, 10uF Tan cap, 12Vin, 5Vo Vin=12V, Turn ON Vin=12V, Turn OFF Hiccup mode
5.1 +1 1 0.4 0.6 +3
110
12Vin, 5Vout, 10F ceramic cap 50~100% load , 10A/uS 50~100% load , 10A/uS Settling to be within regulation band (to 10% Vo deviation) From Enable high to 90% of Vo From Vin=12V to 90% of Vo 0 Full Load, 12Vin, 5Vo Vin=12V, Io=10A Vin=12V, Io=10A Vin=12V, Io=10A Vin=12V, Io=10A Vin=12V, Io=10A Fixed Positive logic (internally pulled high) Module On (or leave the pin open) Module Off 25, 300LFM, 80% load
300 300 100 3 3 1000 70 77.5 89.5 94 91 600 0.8 0 TBD 2 0.3
mV mV s ms ms F F % % % % % KHz V V Mhours grams
DS_NE12S10A_02012007
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ELECTRICAL CHARACTERISTICS CURVES
Figure 1: Converter efficiency vs. output current (0.59V output voltage, 12V input)
Figure 2: Converter efficiency vs. output current (0.9V output voltage, 12V input)
Figure 3: Converter efficiency vs. output current (1.8V output voltage, 12V input)
Figure 4: Converter efficiency vs. output current (2.5V output voltage, 12V input)
Figure 5: Converter efficiency vs. output current (3.3V output voltage, 12V input)
Figure 6: Converter efficiency vs. output current (5.0V output voltage, 12V input)
DS_NE12S10A_02012007
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ELECTRICAL CHARACTERISTICS CURVES (CON.)
Figure 7: Output ripple & noise at 12Vin, 0.59V/10A out
Figure 8: Output ripple & noise at 12Vin, 0.9V/10A out
Figure 9: Output ripple & noise at 12Vin, 1.8V/10A out
Figure 10: Output ripple & noise at 12Vin, 2.5V/10A out
Figure 11: Output ripple & noise at 12Vin, 3.3V/10A out
Figure 12: Output ripple & noise at 12Vin, 5.0V/10A out
DS_NE12S10A_02012007
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ELECTRICAL CHARACTERISTICS CURVES (CON.)
0
0
0
0
Figure 13: Turn on delay time at 12Vin, 1.0V/10A out Ch1: Vin Ch4: Vout
Figure 14: Turn on delay time Remote On/Off, 1.0V/10A out Ch1:Enable Ch4: Vout
0
0
0
0
Figure 15: Turn on delay time at 12Vin, 3.3V/10A out Ch1: Vin Ch4: Vout
Figure 16: Turn on delay time at Remote On/Off, 3.3V/10A out Ch1: Enable Ch4: Vout
0
0
Figure 17: Typical transient response to step load change at 10A/S from 50%~100% load, at 12Vin, 2.5V out
DS_NE12S10A_02012007
5
DESIGN CONSIDERATIONS
The NE10 is a single phase and voltage mode controlled Buck topology. The output can be trimmed in the range of 0.59Vdc to 5.1Vdc by a resistor from Trim pin to Ground. The converter can be turned ON/OFF by remote control with positive on/off (ENABLE pin) logic. The converter DC output is disabled when the signal is driven low (below 0.3V). This pin is also used as the input turn on threshold judgment. Its voltage is percent of Input voltage during floating due to internal connection. So we do not suggest using an active high signal (higher than 0.8V) to turn on the module because this high level voltage will disable UVLO function. The module will turn on when this pin is floating and the input voltage is higher than the threshold. 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 NE converter into a low power dissipation (sleep) mode. Positive ENABLE is available as standard. With the active high function, the output is guaranteed to turn on if the ENABLE pin is driven above 0.8V. The output will turn off if the ENABLE pin voltage is pulled below 0.3V.
Undervoltage Lockout
The ENABLE pin is also used as input UVLO function. Leaving the enable floating, the module will turn on if the input voltage is higher than the turn-on threshold and turn off if the input voltage is lower than the turn-off threshold. The default turn-on voltage is 3.1V with 300mV hysteresis. The turn-on voltage may be adjusted with a resistor placed between the "Enable" pin and "Ground" pin. The equation for calculating the value of this resistor is:
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.
V EN _ RTH =
VEN _ FTH
15.05 x (R + 6.34 ) + 0.8 6.34 x R = VEN _ RTH - 0.3V
Enable NE10A/6A R
Fig. 18. UVLO setting
V EN _ FTH is the turn-off threshold V EN _ RTH is the turn-on threshold
R (Kohm) is the outen resistor connected from Enable pin to the GND An active high voltage will disable the input UVLO function.
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FEATURES DESCRIPTIONS (CON.)
The ENABLE input can be driven in a variety of ways as shown in Figures 19 and 20. If the ENABLE signal comes from the primary side of the circuit, the ENABLE can be driven through either a bipolar signal transistor (Figure 18).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 19).
ND6A/10A NE6A/10A
Vin Enable Vout
Output Voltage Programming
The output voltage of the NE series is trimmable by connecting an external resistor between the trim pin and output ground as shown Figure 21 and the typical trim resistor values are shown in Table 1.
ND 6A/10A NE6A/10A
Vin Vout Trim Enable Rs
Trim
Ground
Ground Ground
Ground
Figure 21: Trimming Output Voltage Figure 19: Enable Input drive circuit for NE series
ND 6A/10A NE6A/10A
Vin Enable Vout
The NE10 module has a trim range of 1.0V to 3.3V. The trim resistor equation for the NE10A is :
Trim
Rs () =
Ground
Ground
1184 Vout - 0.592
Figure 20: Enable input drive circuit example with isolation.
Vout is the output voltage setpoint Rs is the resistance between Trim and Ground Rs values should not be less than 240
Output Voltage Rs ()
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 2.8V to 3.1V. 0.59V +1 V +1.5 V +2.5 V +3.3 V +5.0V +5.5V
Table 1: Typical trim resistor values
Over-Current and Short-Circuit Protection
The NE 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 MOSFETs. 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 MOSFETs also acts as an over temperature protection since high temperature will cause the Rds(on) of the MOSFETs to increase, eventually triggering over-current protection.
DS_NE12S10A_02012007
open 2.4k 1.3K 619 436 268 240
7
FEATURES DESCRIPTIONS (CON.)
Voltage Margining Adjustment
Output voltage margin adjusting can be implemented in the NE 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 22 shows the circuit configuration for output voltage margining adjustment.
Output Capacitance
There is output capacitor on the NE series modules. Hence, an external output capacitor is required for stable operation.
Reflected Ripple Current and Output Ripple and Noise Measurement
The measurement set-up outlined in Figure 23 has been used for both input reflected/ terminal ripple current and output voltage ripple and noise measurements on NE series converters.
Input reflected current measurement point
NNE6A/10A D 6A/10A
Vin Vout
Rmargin-down
Ltest Vin+
DC-DC Converter
Cs Cin 1uF Ceramic 10uF Tan
Load
Trim Enable Rs Ground Ground Rmargin-up
Output voltage ripple noise measurement point
Figure 22: Circuit configuration for output voltage margining
Cs=270F*1, Ltest=2uH, Cin=270F*1 Figure 23: Input reflected ripple/ capacitor ripple current and output voltage ripple and noise measurement setup for NE10
Paralleling
NE10 converters do not have built-in current sharing (paralleling) ability. Hence, paralleling of multiple NE10 converter is not recommended.
DS_NE12S10A_02012007
8
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 CURVES (NE12S0A0V10)
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'').
Figure 25: Temperature measurement location* The allowed maximum hot spot temperature is defined at 109
Output Current (A)
11 10 9 8 7 6
NE12S0A0V10(standard) Output Current vs. Ambient Temperature and Air Velocity @Vin=12V Vout=0.9V (Through PCB Orientation)
600LFM
Natural Convection
100LFM
200LFM
300LFM
5
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.
FACING PWB PWB
4 3
400LFM
500LFM
2 1 0 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature ()
Figure 26: Output current vs. ambient temperature and air velocity @Vin=12V, Vout=0.9V(Through PCB Orientation)
Output Current (A)
11
NE12S0A0V10(standard) Output Current vs. Ambient Temperature and Air Velocity @Vin=12V Vout=2.5V (Through PCB Orientation)
MODULE
10 9 8
600LFM
Natural Convection
100LFM
AIR VELOCITY AND AMBIENT TEMPERATURE MEASURED BELOW THE MODULE
AIR FLOW
7
200LFM
6
50.8 (2.0")
5 4 3 2
300LFM
400LFM
500LFM
11 (0.43") 22 (0.87")
1 0 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature ()
Note: Wind tunnel test setup figure dimensions are in millimeters and (Inches) Figure 24: Wind tunnel test setup
DS_NE12S10A_02012007
Figure 27: Output current vs. ambient temperature and air velocity@ Vin=12V, Vout=2.5V(Through PCB Orientation)
9
THERMAL CURVES (NE12S0A0V10)
Output Current (A)
11 10 9 8 7 6 5 4 3 2
NE12S0A0V10(standard) Output Current vs. Ambient Temperature and Air Velocity @Vin=12V Vout=5.0V (Through PCB Orientation)
Output Current (A)
11 10
NE12S0A0V10(standard) Output Current vs. Ambient Temperature and Air Velocity @Vin=3.3V Vout=0.9V (Through PCB Orientation)
600LFM
9 8
Natural Convection
100LFM
Natural Convection
100LFM
7 6 5
200LFM
300LFM
400LFM
200LFM
300LFM
500LFM
4
400LFM
3 2
600LFM
500LFM
1 0 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature ()
1 0 25 30 35 40 45 50 55 60 65 70 75 80 85
Ambient Temperature ()
Figure 28: Output current vs. ambient temperature and air velocity @Vin=12V, Vout=5.0V(Through PCB Orientation)
Output Current (A)
Figure 31: Output current vs. ambient temperature and air velocity @Vin=3.3V, Vout=0.9V(Through PCB Orientation)
Output Current (A)
11 10
11 10 9 8 7 6 5 4 3 2 1 0 25 30
NE12S0A0V10(standard) Output Current vs. Ambient Temperature and Air Velocity @Vin=5.0V Vout=0.9V (Through PCB Orientation)
NE12S0A0V10(standard) Output Current vs. Ambient Temperature and Air Velocity @Vin=3.3V Vout=2.5V (Through PCB Orientation)
Natural Convection
9
100LFM
8
Natural Convection
100LFM
200LFM
300LFM
7 6
200LFM
300LFM
400LFM
400LFM
500LFM
5
500LFM
4
600LFM
3 2 1 0
600LFM
35
40
45
50
55
60
65
70
75
80
85
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature ()
Ambient Temperature ()
Figure 29: Output current vs. ambient temperature and air velocity@ Vin=5V, Vout=0.9V(Through PCB Orientation)
Output Current (A)
11 10 9 8 7 6 5 4 3 2 1 0 25 30 35 40 45 50 55 60 65 70 75 80 85
Figure 32: Output current vs. ambient temperature and air velocity @Vin=3.3V, Vout=2.5V(Through PCB Orientation)
NE12S0A0V10(standard) Output Current vs. Ambient Temperature and Air Velocity @Vin=5.0V Vout=2.5V (Through PCB Orientation)
Natural Convection
100LFM
200LFM
300LFM
400LFM
500LFM
600LFM
Ambient Temperature ()
Figure 30: Output current vs. ambient temperature and air velocity@ Vin=5.0V, Vout=2.5V(Through PCB Orientation)
DS_NE12S10A_02012007
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MECHANICAL DRAWING
VERTICAL HORIZONTAL
TBD
DS_NE12S10A_02012007
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PART NUMBERING SYSTEM
NE
Product Series
NENon-isolated Series
12
Input Voltage
S
0A0
V
Mounting
V- Vertical
10
Output Current
10-10A
P
ON/OFF Logic
P- Positive
N
Pin Length
N- 0.150"
F
A
Option Code
Number of Output Voltage outputs
output
12- 3.0~13.8V S- Single
0A0 - programmable H- Horizontal
F- RoHS 6/6 A(Lead Free)
5 pins
MODEL LIST
Model Name
NE12S0A0V10PNFA NE12S0A0H10PNFA
Packaging
Vertical Horizontal
Input Voltage
3.0V~ 13.8Vdc 3.0V~ 13.8Vdc
Output Voltage
0.59V~ 5.1Vdc 0.59V~ 5.1Vdc
Output Current
10A 10A
Efficiency 12Vin @ 100% load
94.0%@5Vout 94.0%@5Vout
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.tw
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_NE12S10A_02012007
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