NDM1-12-120 CUI Inc, NDM1-12-120 Datasheet - Page 16

• Manufacturer Part Number: NDM1-12-120
• Description: DIG CONV DC/DC POL 0.6~2.5V 12A
• Manufacturer: CUI Inc
• Series: Novum NDM1-12r
• Type: Digital Point of Load (POL) Non-Isolatedr

Specifications of NDM1-12-120

• Output: 0.6 ~ 2.5V
• Number Of Outputs: 1
• Power (watts): 30W
• Mounting Type: Through Hole
• Voltage - Input: 8.5 ~ 14V
• Package / Case: 24-DIP Module
• 1st Output: 0.6 ~ 2.5 VDC @ 12A
• Size / Dimension: 0.93" L x 0.50" W x 0.46" H (23.6mm x 12.7mm x 11.7mm)
• Power (watts) - Rated: 30W
• Efficiency: 95%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Operating Temperature: -
• 3rd Output: -
• 2nd Output: -
• Other names: 102-2140

MODEL:
CONFIGURATION USING DOWN RESISTORS
Configuration inputs ADDR1 and ADDR2 are used to
assign an initial SMBus address to a device. In small-
scale systems with up to 16 NDM1-12 devices, only one
of the address inputs is required (ADDR1).
All configuration resistors (with the exception of VSET)
should be selected from the standard E12 (or higher)
series, with 1% tolerance, and 100ppm temperature
coefficient. Configuration resistors should be
connected to the configuration inputs, and grounded to
the CRC pin, as illustrated in Figure 10. For all
functions except VSET, sixteen distinct values of
configuration resistors are detected (including short
[0Ω] to CRC, or floating input). For VSET any value of
resistance ranging from 6.2kΩ..68kΩ (outside any
standard resistance series) may be used to choose the
desired output voltage set-point.
Configuration input readings are filtered internally by
the NDM1-12. In addition to this, noisy environments
may require the connection of a small filter capacitance
(100pF) in parallel with the configuration resistors.
The current injected into the configuration resistors is
small (10μA typ.), resulting in negligible power
dissipation and ground currents.
CONFIGURATION INPUT VSET
Configuration input VSET can be used to configure the
output voltage set-point, as well as initial behavior of
control pin CTRL. Resistor RVSET can be chosen in a
continuous range from 0kΩ..100kΩ but NDM1-12 out-
put voltage restrictions (documented elsewhere) limit
the useful RVSET range to approximately 8.2kΩ..47KΩ.
The resulting output voltage can be determined by the
following equation:
20050 SW 112
NDM1-12-120
Figure 10: Configuration inputs
NDM1-12
CRC
th
Ave. Tualatin, Oregon 97062
a division of CUI INC
ADDR1
ADDR2
VSET
R
R
R
VSET
ADDR1
ADDR2
DESCRIPTION:
phone [phone]
and is valid for all values of RVSET except for cases
where pin VSET is shorted to CRC (or RVSET<10Ω or
VSET is floating (or RVSET>90kΩ). For both of these
two special cases of RVSET (shorted to CRC, or floating)
the output voltage set-point will remain at the factory
default level of 0.6V. This relationship is shown in
Figure 11.
2.500
2.000
1.500
1.000
0.500
0.000
0
Figure 11: R VSET versus Output Voltage
0.600
NON-ISOLATED DIGITAL DC-DC
POL CONVERTER
Vout
fax [phone] www.novumdigital.com
10000
0.363
0.437
setpoint
0.533
0.640
=
0.800
20000
0.960
18.75KΩ
R
VSET
1.173
30000
date
page
1.440
•1V
R_VSET in Ω
1.760
10/2010
16 of 19
40000
2.080
50000
2.507