QHW075F1-Q Lineage Power, QHW075F1-Q Datasheet - Page 11

• Manufacturer Part Number: QHW075F1-Q
• Description: CONVRTR DC/DC 3.3V 49.5W OUT
• Manufacturer: Lineage Power
• Series: QHWr
• Type: Isolated with Remote On/Offr

Specifications of QHW075F1-Q

• Output: 3.3V
• Number Of Outputs: 1
• Power (watts): 50W
• Mounting Type: Through Hole
• Voltage - Input: 36 ~ 75V
• Package / Case: 8-DIP Module
• 1st Output: 3.3 VDC @ 15A
• Size / Dimension: 2.28" L x 1.45" W x 0.50" H (57.9mm x 36.8mm x 12.7mm)
• Power (watts) - Rated: 50W
• Operating Temperature: -40°C ~ 100°C
• Efficiency: 81%
• Approvals: CE, CSA, UL, VDE
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• 3rd Output: -
• 2nd Output: -
• 4th Output: -

Data Sheet
April 2008
Feature Descriptions
Remote Sense
Figure 21. Effective Circuit Configuration for
Output Voltage Set-Point Adjustment (Trim)
Output voltage trim allows the user to increase or
decrease the output voltage set point of a module. This
is accomplished by connecting an external resistor
between the TRIM pin and either the SENSE(+) or
SENSE(–) pins. The trim resistor should be positioned
close to the module.
If not using the trim feature, leave the TRIM pin open.
With an external resistor between the TRIM and
SENSE(–) pins (R
(V
tion determines the required external-resistor value to
obtain a percentage output voltage change of Δ%.
With an external resistor connected between the TRIM
and SENSE(+) pins (R
point (V
The following equation determines the required exter-
nal-resistor value to obtain a percentage output voltage
change of Δ%.
The voltage between the V
must not exceed the minimum output overvoltage pro-
tection value shown in the Feature Specifications table.
This limit includes any increase in voltage due to
remote-sense compensation and output voltage set-
point adjustment (trim). See Figure 21.
Lineage Power
O, adj
R
R
SUPPLY
RESISTANCE
adj-down
adj-up
) decreases (see Figure 22). The following equa-
CONTACT
O, adj
=
Single-Module Remote-Sense Operation
) increases (see Figure 23).
=
I
⎛
⎝
I
5.1V
---------------------------------------------- -
⎛
⎝
510
--------- - 10.2
Δ%
adj-down
1.225Δ%
(continued)
V
V
O
I
I
(+)
(–)
(
–
100
adj-up
SENSE(+)
SENSE(–)
), the output voltage set point
+
O
V
V
), the output voltage set
⎞ kΩ
⎠
dc-dc Converters: 36 to 75 Vdc Input, 3.3 Vdc Output; 33 W to 66 W
O
O
(+) and V
Δ%
(+)
(–)
(continued)
QHW050F1-Q, QHW075F1-Q, and QHW100F1-Q Power Modules;
)
–
DISTRIBUTION LOSSES
510
--------- -
Δ%
I
O
O
CONTACT AND
(–) terminals
–
10.2
LOAD
⎞ kΩ
⎠
8-651(F).m
Although the output voltage can be increased by both
the remote sense and by the trim, the maximum
increase for the output voltage is not the sum of both.
The maximum increase is the larger of either the
remote sense or the trim. Consult the factory if you
need to increase the output voltage more than the
above limitation.
The amount of power delivered by the module is
defined as the voltage at the output terminals multiplied
by the output current. When using remote sense and
trim, the output voltage of the module can be
increased, which at the same output current would
increase the power output of the module. Care should
be taken to ensure that the maximum output power of
the module remains at or below the maximum rated
power.
Figure 22. Circuit Configuration to Decrease
Figure 23. Circuit Configuration to Increase
Note: The output voltage of this module may be
V
ON/OFF
CASE
V
V
ON/OFF
CASE
V
I
I
I
I
(+)
(–)
(+)
(–)
increased by a maximum of 0.5 V. The 0.5 V is
the combination of both the remote-sense and
the output voltage set-point adjustment (trim).
Do not exceed 3.8 V between the V
V
O
(–) terminals.
Output Voltage
Output Voltage
SENSE(+)
SENSE(+)
SENSE(–)
SENSE(–)
V
V
TRIM
V
TRIM
V
O
O
O
O
(+)
(+)
(–)
(–)
R
R
adj-up
adj-down
O
(+) and
R
R
LOAD
LOAD
8-748(F).b
8-715(F).b
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