Advanced Data Sheet
February 10, 2011
QBDW033A0B Series Power Modules; DC-DC Converters
36-75V
dc
Input; 9.6-12V
dc
Output; 33A Output Current
Characteristic Curves
The following figures provide typical characteristics for the QBDW033A0B (12V, 33A) at 25ºC. The figures are identical for
either positive or negative Remote On/Off logic.
V
ON/OFF
(V) (2V/div)
V
O
(V) (5V/div)
INPUT CURRENT, I
i
(A)
INPUT VOLTAGE, V
O
(V)
OUTPUT VOLTAGE
On/Off VOLTAGE
TIME, t (10 ms/div)
Figure 1. Typical Input Characteristic at Room
Temperature.
Figure 4. Typical Start-Up Using Remote On/Off with
Vin applied, negative logic version shown.
V
O
(V) (200mV/div)
I
O
(A) (10A/div)
OUTPUT CURRENT, I
O
(A)
OUTPUT CURRENT OUTPUT VOLTAGE
EFFCIENCY,
η
(%)
TIME, t (500
μs/div)
Figure 2. Typical Converter Efficiency Vs. Output
current at Room Temperature.
Figure 5. Typical Transient Response to Step change
in Load from 25% to 50% to 25% of Full Load at Room
Temperature and 48 Vdc Input.
OUTPUT CURRENT OUTPUT VOLTAGE
V
O
(V) (200mV/div)
I
O
(A) (10A/div)
INPUT VOLTAGE
OUTPUT VOLTAGE
V
O
(V) (5V/div)
V
IN
(V) (20V/div)
TIME, t (20 ms/div)
TIME, t (500
μs/div)
Figure 3. Typical Start-Up Using Vin with Remote
On/Off enabled, negative logic version shown.
Figure 6. Typical Transient Response to Step Change
in Load from 50% to 75% to 50% of Full Load at Room
Temperature and 48 Vdc Input.
LINEAGE
POWER
5
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
