International Safety Standard Approvals
VDE0805/EN60950/IEC950 File No. 10401-3336-1073
UL1950 File No. E136005
CSA C22.2 No. 950 File No. LR41062C
BXA75 SERIES
Single output
[ 2 YEAR WARRANTY ]
• 3.5 x 2.4 x 0.5 inch package with stand-offs
• 19 Watts/in3power density
• Efficiency up to 87%
• CISPR 22 and EN55022 conducted emissions level A
• UL, VDE and CSA safety approvals
• Indefinite short circuit protection
• Baseplate operating temperature range of –25°C to +85°C
The BXA75 series are high density DC/DC converters ideally suited for a wide variety
of communications, industrial, computer and distributed power applications. With up
to 80 Watts of power in a 3.5 x 2.4 x 0.5 inch package and efficiencies as high as
87%, the BXA75 can address a host of demanding power requirements, offering a
wide input range of 36-75VDC with industry standard outputs of 3.3V, 5V, 12V and
15V. Approval to EN60950 and EN41003 coupled with conducted emissions
compliance to CISPR 22, FCC and EN55022 level A, facilitate easy and cost effective
design-in for communications systems. The demands of industrial systems are met by
a baseplate operating temperature range of –25°C to 85°C, overvoltage,
overtemperature and short circuit protection, along with tight load and line regulation
and output ripple as low as 15mV rms. Other standard features include remote enable,
remote sense and external trim.
SPECIFICATION
All specifications are typical at nominal input, full load at 25°C unless otherwise stated
PAGE 1
Data Sheet © Artesyn Technologies
®
2000
The information and specifications contained in this data sheet are believed to be correct at
time of publication. However, Artesyn Technologies accepts no responsibility for
consequences arising from printing errors or inaccuracies. Specifications are subject to
change without notice. No rights under any patent accompany the sale of any such
product(s) or information contained herein.
OUTPUT SPECIFICATIONS
Voltage adjustability 3.3V and 15V +10%, -3.0%
5V and 12V +10%, -5.0%
Voltage accuracy ±0.5%
Remote sense 0.5V line drop compensation
Total error band (See Note 2) ±2.0%
Line regulation Typical ±0.15%
Load regulation Typical ±0.3%
Ripple and noise 5Hz-20MHz, 50mV pk-pk
(See Note 3) 15mV rms max.
No external capacitor 100mV pk-pk,
25mV rms max.
Transient response ±4.0% max. dev.
(75% to 100% load step) 100µs recovery
to within 1% Vo
Temperature coefficient ±0.02%/°C Max.
Overvoltage protection (See Note 5) Yes, see table
Short circuit protection Continuous
automatic recovery
INPUT SPECIFICATIONS
Input voltage range 36 to 75VDC
Input filter (See Note 4) Yes
Remote ON/OFF
Logic compatibility (Ref. to -Vin) CMOS/TTL
ON >3.5VDC or open circuit
OFF <0.8VDC
Shutdown idle current Less than 50mA
EMC CHARACTERISTICS
Conducted noise EN55022, FCC (See Note 4) Level A
Surge susceptibility 100V No damage
GENERAL SPECIFICATIONS
Efficiency See table
Isolation voltage 1500VDC
Switching frequency 500kHz ±5.0%
Approvals and VDE0805, EN60950
standards IEC950, UL1950
CSA C22.2 No. 950
Case material Plastic with
aluminum baseplate
Material flammability UL94V-0
Weight 160g (5.65oz)
MTBF Bellcore, 2,600,000 hours
25°C baseplate minimum
ENVIRONMENTAL SPECIFICATIONS
Thermal performance Operating, See curves -25°C to +85°C
(See Note 6) Non-operating –55°C to +125°C
Over temperature 115°C internal
shutdown temperature
auto. recovery
Altitude Operating 10,000 feet max.
Non operating 40,000 feet max.
Vibration 5Hz to 500Hz 2.4G RMS (approx.)
INPUT OUTPUT OUTPUT OVP (5) INPUT EFFICIENCY REGULATION MODEL
VOLTAGE VOLTAGE CURRENT CURRENT (1) LINE LOAD NUMBER (6)
36-75VDC 3.3V 20.0A 4VDC 2.18A 79% ±0.1% ±0.1% BXA75-48S3V3
36-75VDC 5.0V 15.0A 6.2VDC 1.95A 83% ±0.1% ±0.1% BXA75-48S05
36-75VDC 12.0V 6.3A 14VDC 1.85A 86% ±0.1% ±0.1% BXA75-48S12
36-75VDC 15.0V 5.0A 18VDC 1.80A 87% ±0.1% ±0.1% BXA75-48S15
Notes
1 At nominal input and output voltage and maximum load.
2 Total error band is defined as the static output regulation at 25°C including
initial setting accuracy, input voltage within stated limits and output
current within stated limit.
3 Measured with 10µF tantalum capacitor across output.
4 EMI measured on either line into a 50ΩLISN with 120µF electrolytic input
capacitor.
5 Overvoltage limit may be tested by applying -5V to -15V to the trim pin 11
with respect to –sense pin 18.
6 To order optional standard heatsink, please add suffix ‘-1’ to model
number e.g. BXA75-48S05-1.
M3 x 0.5 Metric Tap Thru
0.22 ± 0.03 Dia. Standoff
View fr
View from Underside
(Pin Side)
0.02
(0.5)
0.5
(12.7)
0.15
(3.8)
MIN.
LENGTH
18
17
16
15
14
13
12
11
10
9
0.4 (10.2)
0.7 (17.9 )
3.5 (88.9)
3.2 (81.3)
0.15 (3.8)
0.6 (15.2)
0.7 (17.9)
2.4
(60.9)
0.15 (3.8)
0.45
(11.5)
0.2 (5.1)
1
2
3
4
5
6
7
8
0.2 (5.1)
0.2 (5.1)
0.2 (5.1)
0.2 (5.1)
0.2 (5.1)
0.2 (5.1)
ALL DIMENSIONS IN INCHES (mm)
Pins are in true position within .010 DIA. @ M.M.C.
Tolerance (inches) : .xx = ±0.02
.xxx = ±0.005
Heatsink adds 0.74" to height of unit
0.2 (5.1)
0.04 Dia. (1.02)
0.3 (7.62)
Temperature Derating Data
TRIM
UP/DOWN
TRIM
DOWN
TRIM
UP
+ Sense
TRIM
- Sense
10K
AMBIENT TEMPERATURE (deg.C)
TEMPERATURE DERATING WITHOUT HEATSINK
BXA75-48S3V3/05
TEMPERATURE DERATING WITH HEATSINK
BXA75-48S12/15 (See Note 6)
TEMPERATURE DERATING WITHOUT HEATSINK
BXA75-48S12/15
TEMPERATURE DERATING WITH HEATSINK
BXA75-48S3V3/05 (See Note 6)
AMBIENT TEMPERATURE (deg.C)
110
100
90
80
70
60
50
40
30
20
10
0
200 lfm 500 lfm
"-4" OPTION
0 lfm
OUTPUT POWER (% MAX.)
-40 -20 0 20 40 60 80 100 120
-40 -20 0 20 40 60 80 100 120
-40 -20 0 20 40 60 80 100 120
-40 -20 0 20 40 60 80 100 120
110
100
90
80
70
60
50
40
30
20
10
0
"-4" OPTION
0 lfm 200 lfm
500 lfm
OUTPUT POWER (% MAX.)
110
100
90
80
70
60
50
40
30
20
10
0
0 lfm 200 lfm
"-4" OPTION
500 lfm
OUTPUT POWER (% MAX.)
110
100
90
80
70
60
50
40
30
20
10
0
0 lfm 200 lfm
500 lfm
"-4" OPTION
OUTPUT POWER (% MAX.)
66 to 75 Watt
Wide input DC/DC converters
DC/DC CONVERTERS |
66-75W DC/DC
PAGE 2
http://www.artesyn.com
DS_BXA75_19980401.PDF
PIN CONNECTIONS
PIN PIN
NUMBER FUNCTION NUMBER FUNCTION
1 – Vin 10 No Pin
2 – Vin 11 Trim
3 + Vin 12 + Sense
4 + Vin 13 + Vout
5 No Pin 14 + Vout
6 No Pin 15 No Pin
7 Remote On/Off 16 – Vout
8 No Pin 17 – Vout
9 No Pin 18 – Sense
EXTERNAL OUTPUT TRIMMING
Output can be externally trimmed
by using either method shown below.
