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PDF BK60C-H Data sheet ( Hoja de datos )
| Número de pieza | BK60C-H | |
| Descripción | 36 Vdc to 75 Vdc Inputs | |
| Fabricantes | Astec | |
| Logotipo |  |
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Technical Reference Notes (TRN)
BK60C-H Series
36 Vdc to 75 Vdc Inputs, 150 W
REV
PR-A
PR-B
PR-C
Description
Preliminary Release
Preliminary Release
Remove 1.5, 2, 5V unit – misc.
updates
Date
4/30/00
9/05/00
3/28/01
Approved
KTF
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TECHNICAL REFERENCE
NOTES (TRN)
BK60C-H SERIES
HIGH EFFICIENCY
DC-DC CONVERTER
ASTEC POWER
ANDOVER, MA
_____________________________________________________________
ASTEC POWER - Andover
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1 page  
Technical Reference Notes (TRN)
Feature Specifications (continued)
Table 6. Feature Specifications (continued)
BK60C-H Series
36 Vdc to 75 Vdc Inputs, 150 W
Parameter
Device Symbol Min Typ Max
Output Overvoltage Clamp
018FX Vo,clamp 2.4
-
2.7
025FX Vo,clamp 3.1
-
3.5
033FX Vo,clamp 3.9
-
4.6
Overtemperature Shutdown
All
Tc
105 110
120
Undervoltage Lockout
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Turn-on Point
Turn-off Point
All -
All -
- 34.5
32 32.5
35
-
Unit
V
V
V
ºC
V
V
_____________________________________________________________
ASTEC POWER - Andover
5 of 14
5 Page 
Technical Reference Notes (TRN)
BK60C-H Series
36 Vdc to 75 Vdc Inputs, 150 W
Thermal Considerations
The power converter operates in a variety of thermal environments: however, sufficient cooling
should be provided to help ensure reliable operation of the converter. Heat-dissipating
components are thermally coupled to the case. Heat is removed by conduction, convection and
radiation to the surrounding environment. Proper cooling can be verified by measuring the case
temperature.
Heat Transfer Characteristics
Increasing airflow over the converter enhances the heat transfer via convection. Figure 13 shows
the maximum power that can be dissipated by the converter without exceeding the maximum
www.DataSheet4U.com case temperature versus local ambient temperature (TA) for natural convection through 2.0 m/s
(400 ft/min).
Systems in which these converters are used generate airflow rates of 0.25 m/s (50 ft/min) due to
other heat dissipating components in the system. Therefore, the natural convection condition
represents airflow rates of approximately 0.25 m/s (50 ft/min). Use of Figure 13 is shown in the
following example.
Example
What is the minimum airflow required for an 033F40H operating at 48 V, an output current of 25
A, and maximum ambient temperature of 55 ºC.
Solution:
Given: Vi = 48 V, Io = 25 A, TA = 55 ºC.
Determine PD (Figure 16): PD = 13 W.
Determine airflow (Figure 16): v = 1.0 m/s (200 ft/min)
BK60C SERIES
Power Derating Curve
Nat. Conv.
0.5 m/s (100 ft/min)
1.0 m/s (200 ft/min)
2.0 m/s (400 ft/min)
30
25
20
15
10
5
0
25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110
Ambient Temperature (ºC)
Figure 13. Forced Convection Power Derating
_____________________________________________________________
ASTEC POWER - Andover
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