Delta ND Series - Manual
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Table of Contents:
- Page 2 – TECHNICAL SPECIFICATIONS; PARAMETER; Units
- Page 3 – ELECTRICAL CHARACTERISTICS CURVES; Converter efficiency vs. output current
- Page 7 – DESIGN CONSIDERATIONS; the signal is driven; Safety Considerations; It is recommended that the user to provide a fuse with; in the input line for safety. The output voltage; Enable Input drive circuit for ND series
- Page 8 – circuit configuration for remote sense; Output Voltage Programming; Trimming Output Voltage; Output Voltage; Typical trim resistor values
- Page 9 – Output Capacitance; the Trim pin to the Ground for margining; Circuit configuration for output voltage margining; Reflected Ripple Current and Output Ripple and; Input reflected ripple/ capacitor ripple current and; To use voltage trim, the trim equation for the ND50 is; Vout is the desired output voltage; Power Good
- Page 10 – THERMAL CUREVES; Temperature measurement location* The allowed; Output current vs. ambient temperature and air; THERMAL CONSIDERATION; Thermal Testing Setup; Wind tunnel test setup figure dimensions are in
- Page 12 – WARRANTY
PRELIMINARY DATASHEET
DS_ND12S50A_07172008
FEATURES
High
efficiency:
92.5% @ 12Vin, 3.3V/50A out
y
Size: 61.0x31.8x10.2mm
(2.40”×1.25”×0.40”)
Voltage and resistor-based trim
No minimum load required
Output voltage programmable from
0.9Vdc to 3.63Vdc via external resistors
Fixed
frequency
operation
Single-in line package (SIP)
Input UVLO, output OCP, OTP, SCP
Remote
ON/OFF
(Positive)
Power good output signal (open collector)
Output voltage sense
ISO 9001, TL 9000, ISO 14001, QS9000,
OHSAS18001 certified manufacturing facility
UL/cUL 60950-1 (US & Canada), TUV
(EN60950-1) - pending
APPLICATIONS
DataCom
Distributed power architectures
Servers
and
workstations
LAN / WAN applications
Data processing applications
OPTION
Negative on/off logic
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.
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Summary
DS_ND12S10A_07172008 2 TECHNICAL SPECIFICATIONS (Ambient Temperature=25°C, minimum airflow=200LFM, nominal V in =12Vdc unless otherwise specified.) PARAMETER NOTES and CONDITIONS ND12S0A0V50 (Standard) Min. Typ. Max. Units ABSOLUTE MAXIMUM RATINGS Input Voltage -0.3 13.8 Vdc Operating Temperature Re...
DS_ND12S10A_07172008 3 ELECTRICAL CHARACTERISTICS CURVES 70 75 80 85 90 95 5.01 10 15 20 25 30 35 40 45 50 OUTPUT CURRENT (A) EF F ICI ENCY ( % ) 1 0 . 2 1 2 . 0 1 3 . 8 70 75 80 85 90 95 5.01 10 15 20 25 30 35 40 45 50 OUTPUT CURRENT (A) EF F ICI ENCY ( % ) 1 0 . 2 1 2 . 0 1 3 . 8 Figure 1: Convert...
DS_ND12S10A_07172008 7 DESIGN CONSIDERATIONS The ND 50A uses two phase and voltage mode controlled buck topology. The output can be trimmed in the range of 0.9Vdc to 3.63Vdc with a resistor from Trim pin to Ground. A remote sense function is provided and it is able to compensate for a drop from the ...
