NXA025 Datasheet PDF - Tyco Electronics

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NXA025
Tyco Electronics

Part Number NXA025
Description SMT Non-isolated Power Modules
Page 22 Pages


NXA025 datasheet pdf
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Jameco Part Number 1436359



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Data Sheet
November 9, 2006
NaOSTM NXA025 SMT Non-isolated Power Modules:
10Vdc – 14Vdc Input; 0.8Vdc to 5.5Vdc Output; 25A Output Current
RoHS Compliant
Applications
Distributed power architectures
Intermediate bus voltage applications
Telecommunications equipment
Servers and storage applications
Networking equipment
Enterprise Networks
Latest generation IC’s (DSP, FPGA, ASIC)
and Microprocessor powered applications
Options
Baseplate version for heatsink attachment
(-H suffix)
Through Hole version (-L)
Paralleling with current sharing (-P)
Features
Compliant to RoHS EU Directive 2002/95/EC (-Z
versions)
Compliant to ROHS EU Directive 2002/95/EC with
lead solder exemption (non-Z versions)
Delivers up to 25A output current
High efficiency – 93% at 3.3V full load
Small size and low profile:
47.2 mm x 29.4 mm x 8.50 mm
(1.86 in x 1.16 in x 0.335 in)
Low output ripple and noise
Constant switching frequency (500 kHz)
Surface mount or through hole
Output voltage programmable from 0.8 Vdc to
5.5Vdc via external resistor
Remote On/Off
Remote Sense
Parallel operation with current sharing (-P option)
Output voltage sequencing (multiple modules)
Output overvoltage protection
Overtemperature protection
Output overcurrent protection (non-latching)
Wide operating temperature range (-40°C to 85°C)
UL* 60950-1Recognized, CSAC22.2 No. 60950-1-
03 Certified, and VDE0805:2001-12 (EN60950-1)
Licensed
ISO** 9001 and ISO 14001 certified manufacturing
facilities
Description
The NXA025 series SMT (surface-mount technology) power modules are non-isolated dc-dc converters that can
deliver up to 25A of output current with full load efficiency of 93% at 3.3Vdc output voltage. These modules provide
a precisely regulated output voltage from 0.8Vdc to 5.5Vdc, programmable via an external resistor. Their open-
frame construction and small footprint enable designers to develop cost- and space-efficient solutions. Standard
features include remote On/Off, adjustable output voltage, remote sense, active current sharing between parallel
modules, output voltage sequencing of multiple modules, overcurrent, overvoltage, and overtemperature protection.
* UL is a registered trademark of Underwriters Laboratories, Inc.
CSA is a registered trademark of Canadian Standards Association.
VDE is a trademark of Verband Deutscher Elektrotechniker e.V.
** ISO is a registered trademark of the International Organization of Standards
www.DataSheet.in
Document No: DS03-030 ver. 1.4
PDF name: nxa025_smt_ds.pdf



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Data Sheet
November 9, 2006
NaosTM NXA025 SMT Non-isolated Power Modules:
10 – 14Vdc Input; 0.8Vdc to 5.5Vdc Output; 25A output current
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are
absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in
excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for
extended periods can adversely affect the device reliability.
Parameter
Input Voltage
Continuous
Operating Ambient Temperature
(see Thermal Considerations section)
Storage Temperature
Device
All
All
All
Symbol
VIN
TA
Tstg
Min
-0.3
-40
-55
Max
14
85
125
Unit
Vdc
°C
°C
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions.
Parameter
Operating Input Voltage
Maximum Input Current
(VIN=10.0V to 14.0V, IO=IO, max )
Inrush Transient
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 1µH source impedance; VIN, min to
VIN, max, IO= IOmax ; See Test configuration section)
Input Ripple Rejection (120Hz)
Device
All
All
All
All
All
Symbol
VIN
IIN,max
I2t
Min
10.0
Typ
12.0
60
50
Max Unit
14.0 Vdc
14 Adc
1 A2s
mAp-p
dB
CAUTION: This power module is not internally fused. An input line fuse must always be used.
This power module can be used in a wide variety of applications, ranging from simple standalone operation to being
part of a complex power architecture. To preserve maximum flexibility, internal fusing is not included, however, to
achieve maximum safety and system protection, always use an input line fuse. The safety agencies require a fast-
acting fuse with a maximum rating of 30A (see Safety Considerations section). Based on the information provided in
this data sheet on inrush energy and maximum dc input current, the same type of fuse with a lower rating can be
used. Refer to the fuse manufacturer’s data sheet for further information.
Tyco Electronics Power Systems
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Data Sheet
November 9, 2006
NaosTM NXA025 SMT Non-isolated Power Modules:
10 – 14Vdc Input; 0.8Vdc to 5.5Vdc Output; 25A output current
Electrical Specifications (continued)
Parameter
Output Voltage Set-point
(VIN=VN, min, IO=IO, max, TA=25°C)
Output Voltage
(Over all operating input voltage, resistive load,
and temperature conditions until end of life)
Adjustment Range
Selected by an external resistor
Output Regulation
Line (VIN=VIN, min to VIN, max)
Load (IO=IO, min to IO, max)
Temperature (Tref=TA, min to TA, max)
Output Ripple and Noise on nominal output
(VIN=VIN, nom and IO=IO, min to IO, max
Cout = 2 * 0.47µF ceramic capacitors)
Device
All
All
All
All
All
All
RMS (5Hz to 20MHz bandwidth)
All
Peak-to-Peak (5Hz to 20MHz bandwidth)
External Capacitance
ESR 1 m
ESR 10 m
Output Current
Output Current Limit Inception (Hiccup Mode )
Output Short-Circuit Current
(VO250mV) ( Hiccup Mode )
Efficiency
VIN= VIN, nom, TA=25°C
IO=IO, max , VO= VO,set
Switching Frequency
Dynamic Load Response
(dIo/dt=5A/µs; VIN = VIN, nom; TA=25°C)
Load Change from Io= 50% to 100% of
Io,max; No external output capacitors
Peak Deviation
Settling Time (Vo<10% peak deviation)
(dIo/dt=5A/µs; VIN = VIN, nom; TA=25°C)
Load Change from Io= 100% to 50%of Io,max:
No external output capacitors
Peak Deviation
Settling Time (Vo<10% peak deviation)
All
All
All
All
All
All
VO,set = 0.8Vdc
VO, set = 1.2Vdc
VO,set = 1.5Vdc
VO,set = 1.8Vdc
VO,set = 2.0Vdc
VO,set = 2.5Vdc
VO,set = 3.3Vdc
VO,set = 5.5Vdc
All
All
All
All
All
Symbol
VO, set
VO, set
VO
CO, max
CO, max
Io
IO, lim
IO, s/c
η
η
η
η
η
η
η
η
fsw
Vpk
ts
Vpk
ts
Min
-1.2
-3.0
0.7887
0
Typ
0.01
0.1
0.5
5
15
125
1
79.0
84.7
87.3
88.9
89.7
91.4
93.1
95.1
500
25
25
Max
+1.2
+3.0
Unit
% VO, set
% VO, set
5.5 Vdc
0.1 % VO, set
0.2 % VO, set
1 % VO, set
15 mVrms
50 mVpk-pk
1000
10,000
25
150
µF
µF
Adc
% Io
Adc
%
%
%
%
%
%
%
%
kHz
150 mV
 µs
150 mV
 µs
Tyco Electronics Power Systems
www.DataSheet.in
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