QW050F1 Lineage Power, QW050F1 Datasheet - Page 8

• Manufacturer Part Number: QW050F1
• Description: CONVERTER DC/DC 3.3V 33W OUT
• Manufacturer: Lineage Power
• Series: QWr
• Type: Isolated with Remote On/Offr

Specifications of QW050F1

• Output: 3.3V
• Number Of Outputs: 1
• Power (watts): 33W
• Mounting Type: Through Hole
• Voltage - Input: 36 ~ 75V
• Package / Case: 8-DIP Module
• 1st Output: 3.3 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: 33W
• 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: -

dc-dc Converters; 36 to 75 Vdc Input, 3.3 Vdc Output; 33 W to 50 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
Figure 13. Input Reflected-Ripple Test Setup
BATTERY
η
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.
SUPPLY
socketing, place Kelvin connections at module terminals to
avoid measurement errors due to socket contact resistance.
V
V
RESISTANCE
=
O
O
(+)
(–)
CONTACT
⎛
⎝
TO OSCILLOSCOPE
[
----------------------------------------------- -
V
[
Measurement Test Setup
Measurement Test Setup
V
O
I
I
(+) – V
(+) – V
I
TEST
COPPER STRIP
1.0 µF
C
ESR < 0.1 Ω
@ 20 ˚C, 100 kHz
S
) of 12 µH. Capacitor C
220 µF
V
V
O
I
I
I
(+)
(–)
(–)
(–)
12 µH
L
]I
TEST
]I
SENSE(+)
I
10 µF
SENSE(–)
O
⎞ x 100
⎠
V
V
O
O
ESR < 0.7 Ω
(+)
@ 100 kHz
(–)
33 µF
SCOPE
CURRENT
PROBE
DISTRIBUTION LOSSES
S
I
offsets possible bat-
O
CONTACT AND
%
RESISTIVE
LOAD
V
V
I
I
(+)
(-)
8-513 (C).d
LOAD
8-203 (C).l
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