QW050A1 Lineage Power, QW050A1 Datasheet - Page 8

• Manufacturer Part Number: QW050A1
• Description: CONVERTER DC/DC 5V 50W OUT
• Manufacturer: Lineage Power
• Series: QWr
• Type: Isolated with Remote On/Offr

Specifications of QW050A1

• Output: 5V
• Number Of Outputs: 1
• Power (watts): 50W
• Mounting Type: Through Hole
• Voltage - Input: 36 ~ 75V
• Package / Case: 8-DIP Module
• 1st Output: 5 VDC @ 10A
• 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: 84%
• Approvals: CE, CSA, UL, VDE
• Output Current: 10A
• Input Voltage: 48V
• Output Voltage: 5V
• Output Power: 50
• Screening Level: Industrial
• Operating Temperature Min Deg. C: -40C
• Operating Temperature Max Deg. C: 100C
• Product Length (mm): 36.8mm
• Product Depth (mm): 57.9mm
• Product Height (mm): 12.7mm
• Mounting Style: Through Hole
• Pin Count: 8
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• 3rd Output: -
• 2nd Output: -
• 4th Output: -
• Lead Free Status / Rohs Status: RoHS Not Applicable

dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W and 75 W
Test Configurations
Note: Measure input reflected-ripple current with a simulated source
Note: Use a 1.0 µF ceramic capacitor and a 10 µF aluminum or tan-
Figure 14. Peak-to-Peak Output Noise
Note: All measurements are taken at the module terminals. When
Figure 15. Output Voltage and Efficiency
8 8
SUPPLY
Figure 13. Input Reflected-Ripple Test Setup
η
RESISTANCE
inductance (L
tery impedance. Measure current as shown above.
talum capacitor. Scope measurement should be made using a
BNC socket. Position the load between 51 mm and 76 mm
(2 in. and 3 in.) from the module.
socketing, place Kelvin connections at module terminals to
avoid measurement errors due to socket contact resistance.
V
V
BATTERY
CONTACT
O
=
O
(+)
(–)
⎛
⎝
[
----------------------------------------------- -
V
[
Measurement Test Setup
Measurement Test Setup
TO OSCILLOSCOPE
V
I
O
I
I
(+) – V
(+) – V
TEST
COPPER STRIP
1.0 µF
) of 12 µH. Capacitor C
C
ESR < 0.1 Ω
@ 20 ˚C, 100 kHz
V
V
S
I
I
(+)
(–)
O
I
220 µF
(–)
(–)
12 µH
]I
]I
SENSE(+)
SENSE(–)
L
I
TEST
10 µF
O
⎞ x 100
⎠
V
V
O
O
(+)
(–)
ESR < 0.7 Ω
@ 100 kHz
SCOPE
33 µF
DISTRIBUTION LOSSES
CURRENT
S
PROBE
I
O
offsets possible bat-
CONTACT AND
%
RESISTIVE
LOAD
V
V
I
I
(+)
(-)
8-513 (C).d
8-203 (C).l
LOAD
8-749 (C)
Design Considerations
Input Source Impedance
The power module should be connected to a low
ac-impedance input source. Highly inductive source
impedances can affect the stability of the power mod-
ule. For the test configuration in Figure 13, a 33 µF
electrolytic capacitor (ESR < 0.7 ¾ at 100 kHz)
mounted close to the power module helps ensure sta-
bility of the unit. For other highly inductive source
impedances, consult the factory for further application
guidelines.
Safety Considerations
For safety-agency approval of the system in which the
power module is used, the power module must be
installed in compliance with the spacing and separation
requirements of the end-use safety agency standard,
i.e., UL1950, CSA C22.2 No. 950-95, and VDE 0805
(EN60950, IEC950).
If the input source is non-SELV (ELV or a hazardous
voltage greater than 60 Vdc and less than or equal to
75 Vdc), for the module’s output to be considered
meeting the requirements of safety extra-low voltage
(SELV), all of the following must be true:
n
n
n
n
Note: Do not ground either of the input pins of the
The power module has extra-low voltage (ELV) outputs
when all inputs are ELV.
The input to these units is to be provided with a maxi-
mum 3 A normal-blow fuse in the ungrounded lead.
The input source is to be provided with reinforced
insulation from any hazardous voltages, including the
ac mains.
One V
both the input and output pins are to be kept floating.
The input pins of the module are not operator acces-
sible.
Another SELV reliability test is conducted on the
whole system, as required by the safety agencies, on
the combination of supply source and the subject
module to verify that under a single fault, hazardous
voltages do not appear at the module’s output.
module without grounding one of the output pins.
This may allow a non-SELV voltage to appear
between the output pin and ground.
I
pin and one V
O
pin are to be grounded, or
Lineage Power
April 2008