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DS_NE12S06A_06302008 

7

FEATURES DESCRIPTIONS (CON.) 

 
The ENABLE input can be driven in a variety of ways as 
shown in Figures 18 and 19. If the ENABLE signal comes 
from the primary side of the circuit, the ENABLE can be 
driven through either a bipolar signal transistor (Figure 
19).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 20). 

 

ND6A/10A

 

Vout

 

Ground

 

Trim

 

Enable

 

Ground

 

Vin

 

 

Figure 19: 

Enable Input drive circuit for NE series 

 

Ground

 

Ground

 

 

 

ND 6A/10A

 

 

 

Vin

 

Vout

 

 

 

 

 

Trim

 

 

 

Enable

 

 

 

 

 

 

Figure 20

: Enable input drive circuit example with isolation. 

 
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. 
 

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.  
 
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. 
 
 

 

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 Figure 22.   

 

Vin 

Vout 

Enable

Ground 

Ground 

Trim 

ND 6A/10A 

Rs 

 

Figure 21: 

Trimming Output Voltage 

 
The NE06 module has a trim range of 0.59V to 5.0V. 
The trim resistor equation for the NE06A is : 

592

.

0

1184

)

(

=

Ω

Vout

Rs

 

 
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 (

0.59V open 

+1 V 

2.4k 

+1.5 V 

1.3K 

+2.5 V 

619 

+3.3 V 

436 

+5.0V 

268 

Figure 22: 

Typical trim resistor values

 

 

 
 

 

NE6A/10A

 

NE6A/10A 

NE6A/10A

 

Содержание Delphi 6A Series

Страница 1: ...phi NE 6A Series 3 1 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 which cut the module size by almost 50 in most of the cases compared to the first ge...

Страница 2: ...0uF Tan cap 12Vin 0 5Vo 15 mV Peak to Peak Full Load 10uF Tan cap 12Vin 0 9Vo 20 mV Peak to Peak Full Load 10uF Tan cap 12Vin 2 5Vo 30 mV Peak to Peak Full Load 10uF Tan cap 12Vin 5Vo 50 mV RMS Full Load 10uF Tan cap 12Vin 5Vo 10 mV Output Current Range 0 6 A Output Voltage Over shoot at Start up Vin 12V Turn ON 0 5 Vo Output Voltage Under shoot at Power Off Vin 12V Turn OFF 100 mV Output DC Curre...

Страница 3: ...rrent 0 9V output voltage 12V input voltage Figure 3 Converter efficiency vs output current 1 8V output voltage 12V input voltage Figure 4 Converter efficiency vs output current 2 5V output voltage 12V input voltage Figure 5 Converter efficiency vs output current 3 3V output voltage 12V input voltage Figure 6 Converter efficiency vs output current 5 0V output voltage 12V input voltage ...

Страница 4: ...le noise at 12Vin 0 59V 6A out Figure 8 Output ripple noise at 12Vin 0 9V 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 ...

Страница 5: ... 14 Turn on delay time Remote On Off 1 5V 6A out Ch1 Enable Ch4 Vout Figure 15 Turn on delay time at 12Vin 2 5V 6A out Ch1 Vin Ch4 Vout Figure 16 Turn on delay time at Remote On Off 3 3V 6A out Ch1 Enable Ch4 Vout Figure 17 Typical transient response to step load change at 10A μS from 50 100 load at 12Vin 2 5V out 0 0 0 0 0 0 0 0 0 0 ...

Страница 6: ...line for safety The output voltage set point and the output current in the application could define the amperage rating of the fuse 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 ENAB...

Страница 7: ...cup 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 The detection of the Rds on of MOS...

Страница 8: ...ipple capacitor ripple current and output voltage ripple and noise measurement setup for NE06 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...

Страница 9: ...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...

Страница 10: ...rd Output Current vs Ambient Temperature and Air Velocity Vin 5 0V Vout 2 5V Either Orientation 0 1 2 3 4 5 6 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature Output Current A Natural Convection Figure 31 Output current vs ambient temperature and air velocity Vin 5V Vout 2 5V Either Orientation NE12S0A0V06 standard Output Current vs Ambient Temperature and Air Velocity Vin 3 3V Vout 0 9V...

Страница 11: ...t 2 5V Either Orientation NE12S0A0H06 standard Output Current vs Ambient Temperature and Air Velocity Vin 12V Vout 5 0V Either Orientation 0 1 2 3 4 5 6 25 30 35 40 45 50 55 60 65 70 75 80 85 Natural Convection 300LFM Output Current A Ambient Temperature 400LFM 100LFM 200LFM 500LFM 600LFM Figure 37 Output current vs ambient temperature and air velocity Vin 12V Vout 5 0V Either Orientation NE12S0A0...

Страница 12: ...t A Natural Convection Figure 40 Output current vs ambient temperature and air velocity Vin 3 3V Vout 0 9V Either Orientation NE12S0A0H06 standard Output Current vs Ambient Temperature and Air Velocity Vin 3 3V Vout 2 5V Either Orientation 0 1 2 3 4 5 6 25 30 35 40 45 50 55 60 65 70 75 80 85 100LFM Ambient Temperature Output Current A Natural Convection Figure 41 Output current vs ambient temperat...

Страница 13: ...DS_NE12S06A_06302008 13 MECHANICAL DRAWING VERTICAL HORIZONTAL ...

Страница 14: ... 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 un...

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