QHW075G71 Lineage Power, QHW075G71 Datasheet - Page 10

• Manufacturer Part Number: QHW075G71
• Description: CONVERTER DC/DC 2.5V 38W OUT
• Manufacturer: Lineage Power
• Series: QHWr
• Type: Isolated with Remote On/Offr

Specifications of QHW075G71

• Output: 2.5V
• Number Of Outputs: 1
• Power (watts): 38W
• Mounting Type: Through Hole
• Voltage - Input: 36 ~ 75V
• Package / Case: 8-DIP Module
• 1st Output: 2.5 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: 38W
• Operating Temperature: -40°C ~ 100°C
• Efficiency: 86%
• Approvals: CE, CSA, UL, VDE
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• 3rd Output: -
• 2nd Output: -
• 4th Output: -

dc-dc Converters: 36 to 75 Vdc Input, 2.5 Vdc Output; 25 W to 50 W
Feature Descriptions
Remote On/Off
Remote Sense
Remote sense minimizes the effects of distribution
losses by regulating the voltage at the remote-sense
connections. The voltage between the remote-sense
pins and the output terminals must not exceed the out-
put voltage sense range given in the Feature Specifica-
tions table, i.e.:
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 19.
If not using the remote-sense feature to regulate the
output at the point of load, then connect SENSE(+) to
V
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.
10
10
O
[V
(+) and SENSE(–) to V
Figure 18. Remote On/Off Implementation
O
(+) – V
V
I
on/off
on/off
+
–
O
(–)] – [SENSE(+) – SENSE(–)] ≤ 0.5 V
ON/OFF
V
V
I
I
(+)
(–)
(continued)
O
O
(–) at the module.
(+) and V
SENSE(+)
SENSE(–)
(continued)
V
V
O
O
(+)
(–)
O
(–) terminals
LOAD
8-720 (F).c
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 19. 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%.
O, adj
R
R
SUPPLY
adj-down
adj-up
RESISTANCE
) decreases (see Figure 20). The following equa-
CONTACT
O, adj
Single-Module Remote-Sense Operation
=
) increases (see Figure 21).
=
I
⎛
⎝
I
5.11V
------------------------------------------------- -
⎛
⎝
511
--------- - 10.22
Δ%
adj-down
V
V
1.225Δ%
I
I
(+)
(–)
O
–
(
adj-up
100
SENSE(+)
SENSE(–)
), the output voltage set point
V
V
), the output voltage set
+
O
O
⎞ kΩ
⎠
(+)
(–)
Δ%
)
DISTRIBUTION LOSSES
–
I
O
511
--------- -
Δ%
CONTACT AND
Lineage Power
–
April 2008
LOAD
10.22
8-651 (F).m
⎞ kΩ
⎠