JW100D Lineage Power, JW100D Datasheet - Page 9

• Manufacturer Part Number: JW100D
• 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
Lineage Power
BAT T ER Y
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.
T O O SC ILLO SC O PE
V
V
Measurement Test Setup
O
O
(+)
(–)
TEST
C
ESR < 0.1 •
@ 20 °C , 100 kH z
) of 12 µH. Capacitor C
S
COPPER STRIP
220 µ F
1.0 µF
12 µ H
L
T E S T
dc-dc Converters; 36 to 75 Vdc Input, 2 Vdc Output; 20 W to 60 W
10 µF
ESR < 0.7 •
@ 100 kH z
33 µ F
C U R R EN T
PR O BE
SCOPE
S
offsets possible bat-
RESISTIVE
LOAD
8-513 (C).d
8-203 (C).l
V
V
I
I
( + )
( –)
Note: All measurements are taken at the module terminals. When
Figure 19. Output Voltage and Efficiency
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.
η
socketing, place Kelvin connections at module terminals to
avoid measurement errors due to socket contact resistance.
=
SUPPLY
⎛
⎝
RESISTANCE
[
----------------------------------------------- -
CONTACT
V
[
Measurement Test Setup
V
O
I
(+) – V
(+) – V
I
I
O
I
(–)
(–)
V
V
I
I
(+)
(–)
]I
]I
I
O
SENSE(+)
SENSE(–)
⎞ x 100
⎠
V
V
O
O
(+)
(–)
DISTRIBUTION LOSSES
I
O
%
CONTACT AND
LOAD
8-749 (C)
9