Special Features
Electrical Specs
150 Watts
BK60C-40
High Efficiency
High efficiency, 5V@89%
-40C to 100C baseplate operating
temperature (no derating)
Positive and Negative enable function
Low output ripple and noise
High capacitive load limit on start-up
Remote sense compensation
Regulation to zero load
Fixed frequency switching (300 kHz)
Operating temperature (baseplate):
-40C to +100C
Storage temperature: -55C to +105C
Overtemperature protection: 110C typical
MTBF: >1 million hours
Input
Input range
36-75 VDC
Input Surge
100V / 100ms
Efficiency
89% @ 3.3V (typ)
Output
Load regulation
10mV typical down to no load
(output below 5V)
Line regulation
10mV typical
(outpt below 5V)
Ripple and noise
200mV p-p max)
Remote sense
Up to 0.5V
Output voltage
adjust range
20% of nominal output
Transient Response
10% max deviation with 25% to 75%
full load (output 5V and above)
200mV
Overvoltage Protection
130% nominal output
(output 5V and above)
160% nominal outpt
(2.2V output)
140% nominal output
(3.3V output)
Current Limit
115% maximum output
Control
Voltage Adjust
90 to 110%
Enable
TTL compatible (positive & negative
enable options)
Notes:
1. Nominal values apply with sense pins connected and other
control pins unconnected.
2. Specifications subject to change without notice.
Environmental
Total Power:
150 Watts
Input Voltages:
48V
No. of Outputs:
Single
UL
UL 1950
CAN22.2-950
TUV
EN60950
Safety
A
s
t
e
c
Indu
str
y
S
t
andard
America's (USA): 1-888-41-ASTEC
Europe (UK): 44 (1384) 842-211
Asia (HK): 852-2437-9662
44
W9959_02_DCDC_001-073_73 2/8/02 3:38 PM Page 44
EUROPE
Astec House, Waterfront Business Park
Merry Hill, Dudley
West Midlands, DY5 1LX, UK
Telephone: 44 (1384) 842-211
Facsimile: 44 (1384) 843-355
AMERICAS
5810 Van Allen Way
Carlsbad, CA 92008
Telephone: 760-930-4600
Facsimile: 760-930-0698
Ordering Information
ASIA
Units 2111-2116, Level 21
Tower1, Metroplaza
223, Hing Fong Road
Fwai Fong, New Territories
Hong Kong
Telephone: 852-2437-9662
Facsimile: 852-2402-4426
Input
Output
Efficiency
Model Number
Voltage
Voltage
48V
1.8V @ 40A
81% min
BK60C-048L-018F40H
48V
2.5V @ 40A
84% min
BK60C-048L-025F40H
48V
3.3V @ 40A
86% min
BK60C-048L-033F40H
NOTES:
Efficiency is measured at full load and Tc=70 Deg C
"N" added to suffix = Negative Enable (Omit suffix for positive enable (default))
Case Material: Metal base, plastic cover
Weight: 2.75 Oz / 78 Grams
Single Output
1. -Vin
2. Case
3. Enable (on/off)
4. +Vin
5. -5V Rtn
6. - Sense
7. Trim
8. + Sense
9. +Out
Notes:
1. 20 mHz bandwidth. An external 2.2 mf ceramic capacitor is recommended to
be placed from +V out to -V out.
2. Requires a 2.2 mf, 100V film capacitor connected between +V in and -V in to
meet FCC class A and ETS300-386-1 requirements for conducted noise.
Consult Factory for filtering information to meet FCC class B, VDE or EIC spec-
ifications.
3. All specifications are typical at nominal line, full load, and 25C unless
otherwise noted.
4. All specifications subject to change without notice. Mechanical drawings are
for reference only.
5. Please refer to the Technical Reference Notes for more information.
6. Warranty: 1 yr
Pin Assignments
BK60C
-40
A
s
t
e
c
Indu
str
y
S
t
andard
2.30
1.900
BOTTOM VIEW
.20 MIN.
.50
[58.4]
[48.26]
NOTE
1
[12.7]
[5.0]
.600
[15.24]
1.400
[35.56]
2.000
[50.80]
2.40
[61.0]
1
2
3
4
5
6
7
8
9
Mounting Inserts
M3 X .5 (4 places)
45
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W9959_02_DCDC_001-073_73 2/8/02 3:38 PM Page 45
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