background image

PRELIMINARY DATASHEET 
DS_ND12S50A_07172008 

FEATURES 

Š

 High 

efficiency: 

92.5% @ 12Vin, 3.3V/50A out 

y

 

Size: 61.0x31.8x10.2mm     

(2.40”×1.25”×0.40”) 

Š

 

Voltage and resistor-based trim 

Š

 

No minimum load required 

Š

 

Output voltage programmable from        

0.9Vdc to 3.63Vdc via external resistors 

Š

 Fixed 

frequency 

operation 

Š

 

Single-in line package (SIP) 

Š

 

Input UVLO, output OCP, OTP, SCP 

Š

 Remote 

ON/OFF 

(Positive) 

Š

 

Power good output signal (open collector) 

Š

 

Output voltage sense 

Š

 

ISO 9001, TL 9000, ISO 14001, QS9000, 

OHSAS18001 certified manufacturing facility 

Š

 

UL/cUL 60950-1 (US & Canada), TUV 

(EN60950-1) - pending

 

 
 

APPLICATIONS 

Š

 DataCom 

Š

 

Distributed power architectures 

Š

 Servers 

and 

workstations 

Š

 

LAN / WAN applications 

Š

 

Data processing applications

 

OPTION

 

Š

 

Negative on/off logic 

Š

 Current 

sharing 

Delphi ND Series Non-Isolated Point of Load 
DC/DC Power Modules: 12Vin, 0.9V~3.63Vout, 
50Aout 

 
The Delphi ND Series, 12V input, 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 ND/NE product family is the second generation, non-isolated 
point-of-load DC/DC power modules for the DataCom / Networking / IT 
Applications and it will help to cut the module size by 35% to 50% 
compared to the first generation NC series POL modules. The ND/NE 
product family provides 6A to 60A of output current in a vertically or 
horizontally mounted through-hole package and the output can be 
resistor trimmed from 0.9Vdc to 3.63Vdc. 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. 

 

Содержание Delphi ND Series

Страница 1: ...odules 12Vin 0 9V 3 63Vout 50Aout The Delphi ND Series 12V input 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 ND NE product family is the second generation non isolated point of load DC DC power modules for the DataCom Networking IT Applications and it will help to c...

Страница 2: ...uF OSCON 25 50 mV RMS Full Load 1uF ceramic 10uF Tan cap and 4 680uF OSCON 5 15 mV Output Current Range 0 50 A Output Voltage Over shoot at Start up Vin 12V Turn ON 2 Output Voltage Under shoot at Power Off Vin 12V Turn OFF 100 mV Output DC Current Limit Inception Hiccup mode 110 200 Iomax DYNAMIC CHARACTERISTICS Output Dynamic Load Response 12Vin 1uF ceramic 10uF Tan cap and 4 680uF OSCON Positiv...

Страница 3: ... 35 40 45 50 OUTPUT CURRENT A EFFICIENCY 10 2 12 0 13 8 70 75 80 85 90 95 100 5 01 10 15 20 25 30 35 40 45 50 OUTPUT CURRENT A EFFICIENCY 10 2 12 0 13 8 Figure 3 Converter efficiency vs output current 1 5V output voltage Figure 4 Converter efficiency vs output current 1 8V output voltage 70 75 80 85 90 95 100 5 01 10 15 20 25 30 35 40 45 50 OUTPUT CURRENT A EFFICIENCY 10 2 12 0 13 8 70 75 80 85 90...

Страница 4: ...noise at 12Vin 0 9V 50A out Figure 8 Output ripple noise at 12Vin 1 2V 50A out Figure 9 Output ripple noise at 12Vin 1 5V 50A out Figure 10 Output ripple noise at 12Vin 1 8V 50A out Figure 11 Output ripple noise at 12Vin 2 5V 50A out Figure 12 Output ripple noise at 12Vin 3 3V 50A out ...

Страница 5: ... Enable Figure 15 Turn on delay time at 12Vin 3 3V 50A out Ch1 Vout Ch4 Vin Figure 16 Turn on delay time at Remote On Off 3 3V 50A out Ch1 Vout Ch4 Enable Figure 17 Typical transient response to step load change at 10A μS from 50 to 75 and 75 to 50 of Io max at 12Vin 0 9V out Figure 18 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 ...

Страница 6: ... 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 21 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 22 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 ...

Страница 7: ...Safety Considerations It is recommended that the user to provide a fuse with TBD 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 FEATURES DESCRIPTIONS ENABLE On Off The ENABLE on off input allows external circuitry to put the ND converter into a low power dissipation sleep mode Positive ENABLE is avail...

Страница 8: ...tion 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 connects as shown in Figures 25 Figure 25 circuit configuration for remote sense Over Temperature Protection OTP To provide additional over temperature protection in a fault condition...

Страница 9: ... Cs 270μF 1 Ltest 1 4uH Cin 270μF 2 Cout 680uF 4 Figure 30 Input reflected ripple capacitor ripple current and output voltage ripple and noise measurement setup for ND50 FEATURES DESCRIPTIONS CON The output can also be set by an external voltage connected to trim pin as shown in Figure 28 Figure 28 output voltage trim with voltage source To use voltage trim the trim equation for the ND50 is please...

Страница 10: ...re 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 c...

Страница 11: ...re and Air Velocity Vin 12V Vout 3 3V Through PCB Orientation 0 5 10 15 20 25 30 35 40 45 50 55 25 30 35 40 45 50 55 60 65 70 75 80 85 Natural Convection Output Current A Ambient Temperature 100LFM 200LFM 400LFM 300LFM Figure 35 Output current vs ambient temperature and air velocity Vin 12V Vout 3 3V Through PCB Orientation ...

Страница 12: ...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 ...

Отзывы: