EOL
2 YEAR WARRANTY
NXA66 Series
S i ngl e outpu t ( Non-Isolated)
•Transient response from 0 A to rated full load
(up to 30 A/µs), recovery within 250 µs
•Democratic current sharing, no need for master/slave
conguration
•Programmable output voltage
•Remote enable pin
•Power good signal
•True double ended dierential remote sense
•Available RoHS compliant
The NXA66 non-isolated dc-dc converter is targeted at computing applications that
require point of load power conversion. The NXA66 is designed to meet the precise
voltage and fast transient requirements of today’s high performance applications such
as workstations, le servers, desktop computers, telecommunications equipment,
adapter cards, DSP and data processing. Employing synchronous rectication and
democratic current sharing, the NXA66 can be used in a stand-alone conguration, or
paralleled as a building block to achieve higher output currents or redundancy. The
current sharing specications are met during static conditions, and transient conditions.
The advanced democratic current sharing technique employed by the NXA66 removes
the need for cumbersome master/slave combinations. The NXA66 uses gold plated
edge tab ngers for a convenient, low impedance interconnect scheme. This also
allows system designers to easily accommodate future expansion in their systems.
All specications ar e typical at nominal input, full load at 25 °C unless otherwise stated
GENERAL SPECIFICATIONS
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%28tuptuo 5V2
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05906NEdna slavorppA
0591LU lanoitan-iBsdradnats
CSA C22.2 No. 234/950
)zo 5.1( g 6.24thgieW
MTBF Bellcore 332 3,500,000 hours
ENVIRONMENT AL SPECIFICA TIONS
Maximum temperatur e Operating 5 ˚C/10 min.
shock
Temperature shock Operating 10 ˚C/hour
Non-operating 20 ˚C/hour
Humidity Operating 85% RH
Storage 95% RH
Altitude Operating 10,000 feet max.
Storage 50,000 feet max.
Shock Operational and 50 G 11ms
non-operational half sine wave
Vibration Operational and 0.02 G 2/Hz max.
(See Note 3) non-operational
Electrostatic discharge Operating (See Note 4) ESD 15 kV
non-operating ESD 25 kV
OUTPUT SPECIFICATIONS
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to 2V5 or 3V3
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%5.4tuptuo 5V2
Ripple and noise (20 MHz bandwidth) 150 mV pk-pk max.
Transient response 50% to 75% and back 150 mV
peak dev. settling time to 1.0%, no external cap. 400 µs
suounitnoCnoitcetorp tiucric trohS
yrevocer citamotuasmr A 52 = csI
INPUT SPECIFICA TIONS
Input voltage range 12 V in nominal 10.8-13.2 Vdc
Input current No load 100 mA typ.
Remote OFF 10 mA max.
UVLO tur n ON voltage 10.4 V max.
UVLO tur n OFF voltage 8.2 V min.
Star t-up time Nominal line 15 ms
Active high remote ON/OFF
tupni- ot .feRytilibitapmoc cigoL
.nim cdV 8.01egatlov tiucric nepONO
.xam cdV 8.0FFO
SPECIFICATIONS
File Name: nxa66.pdf Rev (02): 20 Dec 2005
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2.750 (69.85)
1.065 (27.05)
1.375 (34.93)
1-25 26-50
33 4305
251817
1
26
26-50 1-25
)61.01( 004.0)81.3( 521.0
0.700 (17.78)
2.586 (65.68)
0.875 (22.23)
R0.080 (R2.03) (2 PLS)
ON CKT BOARD
HEATSINK
0.588 (14.92)
ALL DIMENSIONS IN INCHES (mm)
(See Notes 1 and 2)
Datasheet © Artesyn Technologies
®
2005
The information and specications contained in this datasheet are believed to be correct at time of publication. However, Artesyn Technologies accepts no responsibility for consequences arising
from printing errors or inaccuracies. Specications are subject to change without notice. No rights under any patent accompany the sale of any such product(s) or information contained herein.
NXA66 Series
S i ngl e outpu t ( Non-Isolated)
Please consult our website for the following items: Longform Datasheet www.PowerConversion.com
PIN CONNECTIONS
PIN NO. ROW A ROW B PIN NO.
1 12 Vin RTN 50
2 12 Vin RTN 49
3 12 V in RTN 48
4 12 Vin RTN 47
5 12 V in RTN 46
6 Reser ved R TN 45
7 VSP
8 PWRGD Reserved 43
9 OUTEN Ishar e 42
10 Reserved Reserved 41
11 Vo-sense Vo-sense rtn 40
12 Vout Return 39
13 Vout Return 38
14 Vout RTN 37
15 Vout RTN 36
16 Vout RTN 35
17 Vout R TN 34
18 Vout RTN 33
19 Vout RTN 32
20 Vout RTN 31
21 Vout RTN 30
22 Vout RTN 29
23 Vout RTN 28
24 Vout RTN 27
25 Vout RTN 26
INPUT NOMINAL OUTPUT NOMINAL OUTPUT MINIMUM MODEL
VOLTAGE VOLTAGE CURRENT EFFICIENCY NUMBER (5,6)
YC3V3P21-66AXN%28/68A 02cdV 5.2/3.3cdV 21
Ambient Temperature ( °C)
Output C urrent (A)
0
2
4
6
8
10
12
14
16
18
20
10 20 30 40 50 60 70 80 90 100
400 Lfm
300 Lfm
200 Lfm
100 Lfm
Zero Air
File Name: nxa66.pdf Rev (02): 20 Dec 2005
Notes C ond.
4Initilization level; ESD event shall cause no out-of-regulation conditions.
5The ‘Y’ sux indicates that these parts are TSE RoHS 5/6 (non Pb-free)
compliant.
6NOTICE: Some models do not support all options. Please contact your
local Emerson representative or use the on-line model number search tool
at http://www.Emerson.com/EmbeddedPower to nd a suitable alternative.
Notes
1In this view, row B of the edge connector is visible. The leftmost pin is pin
50, and the rightmost pin is pin 26. Row A of the connector is on the
opposite side of the unit. Pin 1 is behind pin 50, pin 25 is behind pin 26.
S ee below for pinout.
2R ecommended mating connector is AMP 145432 or equivalent. Pin 44 is
absent and is used for electrical key. AMP keying plug PN 65025-2 may
be placed in the mating connector between pins 33 and 34, and between
pins 17 and 18. This keying plug serves as a mechanical key.
3From 5 Hz to 20 Hz, maintaining 0.02 G 2/Hz fr om 20 Hz to 500 Hz, all
axes.