JW075C Lineage Power, JW075C Datasheet - Page 9

• Manufacturer Part Number: JW075C
• Manufacturer: Lineage Power

April 2008
Test Configurations
Note: Measure input reflected-ripple current with a simulated source
Figure 17. Input Reflected-Ripple Test Setup
Note: Use a 1.0 µF ceramic capacitor and a 10 µF aluminum or
Figure 18. Peak-to-Peak Output Noise
Note: All measurements are taken at the module terminals. When
Figure 19. Output Voltage and Efficiency
Lineage Power
BAT T ER Y
η
inductance (L
tery impedance. Measure current as shown above.
tantalum 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.
T O O SC ILLO SC O PE
=
SUPPLY
⎛
⎝
V
V
RESISTANCE
[
----------------------------------------------- -
O
O
CONTACT
V
[
Measurement Test Setup
Measurement Test Setup
(+)
(–)
V
O
I
(+) – V
(+) – V
TEST
I
I
C
ESR < 0.1 •
@ 20 °C , 100 kH z
) of 12 µH. Capacitor C
S
COPPER STRIP
220 µ F
1.0 µF
O
I
(–)
(–)
12 µ H
V
V
L
I
I
(+)
(–)
T E S T
]I
]I
I
O
dc-dc Converters; 36 to 75 Vdc Input, 15 Vdc Output; 50 W to 150 W
SENSE(+)
SENSE(–)
⎞ x 100
⎠
10 µF
V
V
O
O
ESR < 0.7 •
@ 100 kH z
(+)
(–)
33 µ F
C U R R EN T
PR O BE
SCOPE
DISTRIBUTION LOSSES
S
I
offsets possible bat-
O
%
CONTACT AND
RESISTIVE
LOAD
LOAD
8-513 (C).d
8-203 (C).l
V
V
8-749 (C)
I
I
( + )
( –)
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 17, 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 20 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
9