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PDF ( 数据手册 , 数据表 ) NC12S0A0V20

零件编号 NC12S0A0V20
描述 DC/DC Power Modul
制造商 Delta Electronics
LOGO Delta Electronics LOGO 


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NC12S0A0V20 数据手册, 描述, 功能
Delphi NC20 Series Non-Isolated Point of Loadwww.DataSheet4U.com
DC/DC Power Modules: 12Vin, 0.9V-5.0Vout, 20A
The Delphi NC20 Series, 12V input, single output, non-isolated point of
load DC/DC converters are the latest offering from a world leader in
power systems technology and manufacturing Delta Electronics, Inc.
The NC20 series operates from a 12V nominal input, provides up to
20A of power in a vertical or horizontal mounted through-hole package
and the output can be resistor- or voltage-trimmed from 0.9Vdc to
5.0Vdc. It provides a very cost effective 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.
FEATURES
High Efficiency:
91% @ 12Vin, 5V/20A out
Size: 30.5x27.9x11.4mm
(1.20”×1.10”×0.45”) -- Vertical
30.5x27.9x12.9mm
(1.20”×1.10”×0.51”) -- Horizontal
Voltage and resistor-based trim
No minimum load required
Output voltage programmable from
0.9Vdc to 5.0Vdc via external resistors
Fixed frequency operation
Input UVLO, output OCP, SCP
Power good output signal
Remote ON/OFF (default: positive)
ISO 9001, TL 9000, ISO 14001, QS 9000,
OHSAS 18001 certified manufacturing
facility
UL/cUL 60950 (US & Canada) Recognized,
and TUV (EN60950) Certified
OPTIONS
Vertical or horizontal mounted
Negative On/Off logic
APPLICATIONS
DataCom
Distributed power architectures
Servers and workstations
LAN/WAN applications
Data processing applications
DATASHEET
DS_NC12S20A_02072007







NC12S0A0V20 pdf, 数据表
FEATURES DESCRIPTIONS
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 7.0V to
8.0V.
Over-Current and Short-Circuit Protection
The NC 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 high-side MOSFET. 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 the high side MOSFET
also acts as an over temperature protection since high
temperature will cause the Rds(on) of the MOSFET to
increase, eventually triggering over-current protection.
Output Voltage Programming
The output voltage of the NC series is trimmable by
connecting an external resistor between the trim pin and
output ground as shown Figure 27 and the typical trim
resistor values are shown in Figure 28. The output can
also be set by an external voltage connected to trim pin
as shown in Figure 29.
NC6A/15A/20A
Vin Vout
Enable
Trim
Ground
Ground
Figure 27: Trimming Output Voltage
Rs
DS_NC12S20A_02072007
The NC15A/20A module has a trim range of 0.9V to
5.0V. The trim resistor equation for the NC6A/NC15A/
NC20A is :
Rs() = 1170
Vout 0.9
Vout is the output voltage setpoint
Rs is the resistance between Trim and Ground
Rs values should not be less than 280
Output Voltage
+0.9 V
+1.2 V
+1.5 V
+1.8 V
+2.5 V
+3.3 V
+5.0 V
Rs ()
OPEN
3.92K
1.96K
1.3K
732
487
287
Figure 28: Typical trim resistor values
NC6A/15A/20A
Vout
Vin
1.3K
Enable
Trim
Ground
Ground
Rt
Rs
Vt
Figure 29: Output voltage trim with voltage source
To use voltage trim, the trim equation for the
NC6A/NC15A/ NC20A is (please refer to Fig. 29) :
Rt(k) = Rs(1.3Vt 1.17)
1.17 Rs(Vout 0.9)
Vout is the desired output voltage
Vt is the external trim voltage
Rs is the resistance between Trim and Ground (in K)
Rt is the resistor to be defined with the trim voltage (in K)
Below is an example about using this voltage trim
equation :
Example
If Vt = 1.25V, desired Vout = 2.5V and Rs = 0.715K
Rt(K) = Rs(1.3Vt 1.17) = 12.51K
1.17 Rs(Vout 0.9)
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