QHW075Y1 Lineage Power, QHW075Y1 Datasheet - Page 11

• Manufacturer Part Number: QHW075Y1
• Description: CONVERTER DC/DC 1.8V 27W OUT
• Manufacturer: Lineage Power
• Series: QHWr
• Type: Isolated with Remote On/Offr

Specifications of QHW075Y1

• Output: 1.8V
• Number Of Outputs: 1
• Power (watts): 27W
• Mounting Type: Through Hole
• Voltage - Input: 36 ~ 75V
• Package / Case: 8-DIP Module
• 1st Output: 1.8 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: 27W
• Operating Temperature: -40°C ~ 100°C
• Efficiency: 82%
• Approvals: CE, CSA, UL, VDE
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• 3rd Output: -
• 2nd Output: -
• 4th Output: -

April 2008
Feature Descriptions
Remote Sense
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 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
Lineage Power
O, adj
R
SUPPLY
RESISTANCE
adj-down
) decreases (see Figure 22). The following equa-
CONTACT
O, adj
Single-Module Remote-Sense Operation
) increases (see Figure 23).
=
I
I
⎛
⎝
511
--------- - 10.22
Δ%
adj-down
(continued)
V
V
I
I
(+)
(–)
–
adj-up
SENSE(+)
SENSE(–)
), the output voltage set point
V
V
), the output voltage set
dc-dc Converters: 36 to 75 Vdc Input, 1.8 Vdc Output; 18 W to 36 W
O
O
⎞ kΩ
⎠
(+)
(–)
(continued)
DISTRIBUTION LOSSES
I
O
CONTACT AND
LOAD
8-651(F).m
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.
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
R
adj-up
V
ON/OFF
CASE
V
I
I
(+)
(–)
=
Output Voltage
⎛
⎝
5.11V
------------------------------------------------- -
SENSE(+)
SENSE(–)
V
1.225Δ%
TRIM
V
O
O
O
(+)
(–)
(
100
O
+
(+) and V
Δ%
)
–
R
511
--------- -
Δ%
adj-down
O
(–) terminals
–
10.22
R
LOAD
⎞ kΩ
⎠
8-748(F).b
11