Data Sheet
Januar
26, 2011
QBK033A0B Series Power Modules; dc-dc Converters
36
60 Vdc In
ut; 12Vdc Out
ut; 33A Out
ut Current
10 LINEAGE POWER
Layout Considerations
The QBK033 power module series are low profile in
order to be used in fine pitch system card architectures.
As such, component clearance between the bottom of
the power module and the mounting board is limited.
Avoid placing copper areas on the outer layer directly
underneath the power module. Also avoid placing via
interconnects underneath the power module.
For additional layout guide-lines, refer to FLTR100V10
data sheet.
OUTPUT CURRENT, I
O
(A)
12
16
20
24
28
32
36
20 30 40 50 60 70 80 90
200 lfm
(1.0 m/s)
300 lfm
(1.5 m/s)
400 lfm
(2.0 m/s)
600 lfm
(3.0 m/s)
LOCAL AMBIENT TEMPERATURE, T
A
(C)
Figure 16. Output Current Derating for the
QBK033A0B (Vo = 12V) in the Transverse Orientation
with baseplate and 0.25-inch high heatsink; Airflow
Direction from Vin(+) to Vin(–); Vin = 48V.
OUTPUT CURRENT, I
O
(A)
16
20
24
28
32
36
20 30 40 50 60 70 80 90
200 lfm
(1.0 m/s)
300 lfm
(1.5 m/s)
600 lfm
(3.0 m/s)
400 lfm
(2.0 m/s)
LOCAL AMBIENT TEMPERATURE, T
A
(C)
Figure 17. Output Current Derating for the
QBK033A0B (Vo = 12V) in the Transverse Orientation
with baseplate and 0.5-inch high heatsink; Airflow
Direction from Vin(+) to Vin(–); Vin = 48V.
OUTPUT CURRENT, I
O
(A)
20
24
28
32
36
20 30 40 50 60 70 80 90
200 lfm
(1.0 m/s)
300 lfm
(1.5 m/s)
600 lfm
(3.0 m/s)
400 lfm
(2.0 m/s)
LOCAL AMBIENT TEMPERATURE, T
A
(C)
Figure 18. Output Current Derating for the
QBK033A0B (Vo = 12V) in the Transverse Orientation
with baseplate and 1.0-inch high heatsink; Airflow
Direction from Vin(+) to Vin(–); Vin = 48V.
