QW075A1 Lineage Power, QW075A1 Datasheet - Page 10

• Manufacturer Part Number: QW075A1
• Description: CONVERTER DC/DC 5V 75W OUT
• Manufacturer: Lineage Power
• Series: QWr
• Type: Isolated with Remote On/Offr

Specifications of QW075A1

• Output: 5V
• Number Of Outputs: 1
• Power (watts): 75W
• Mounting Type: Through Hole
• Voltage - Input: 36 ~ 75V
• Package / Case: 8-DIP Module
• 1st Output: 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: 75W
• Operating Temperature: -40°C ~ 100°C
• Efficiency: 84%
• Approvals: CE, CSA, UL, VDE
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• 3rd Output: -
• 2nd Output: -
• 4th Output: -

QW050B1 and QW075B1 Power Modules; dc-dc Converters:
36 Vdc to 75 Vdc Input, 12 Vdc Output; 50 W to 75 W
Feature Descriptions
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 16.
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.
10
10
O, adj
R
R
adj-down
adj-up
) decreases (see Figure 17). The following equa-
O, adj
=
) increases (see Figure 18).
=
⎛
⎝
5.1V
---------------------------------------------- -
⎛
⎝
510
--------- - 10.2
Δ%
adj-down
1.225Δ%
O
(
–
100
adj-up
), the output voltage set point
+
O
), the output voltage set
⎞
⎠
(+) and V
Δ%
(continued)
kΩ
)
–
510
--------- -
Δ%
O
(–) terminals
–
10.2
⎞ kΩ
⎠
Figure 17. Circuit Configuration to Decrease
Figure 18. Circuit Configuration to Increase
Output Overvoltage Protection
The output overvoltage protection consists of circuitry
that monitors the voltage on the output terminals. If the
voltage on the output terminals exceeds the overvolt-
age protection threshold, then the module will shut
down and latch off. The overvoltage latch is reset by
either cycling the input power for one second or by tog-
gling the on/off signal for one second.
Overtemperature Protection
These modules feature an overtemperature protection
circuit to safeguard against thermal damage. The cir-
cuit shuts down and latches off the module when the
maximum case temperature is exceeded. The module
can be restarted by cycling the dc input power for at
least one second or by toggling the primary or second-
ary referenced remote on/off signal for at least one sec-
ond.
V
ON/OFF
CASE
V
V
ON/OFF
CASE
V
I
I
I
I
(+)
(–)
(+)
(–)
Output Voltage
Output Voltage
SENSE(+)
SENSE(–)
SENSE(+)
SENSE(–)
V
TRIM
V
V
TRIM
V
O
O
O
O
(+)
(+)
(–)
(–)
R
R
adj-up
adj-down
Lineage Power
Data Sheet
April 2008
R
R
LOAD
LOAD
8-748 (F).b
8-715 (F).b