dc025 Lineage Power, dc025 Datasheet - Page 10

• Manufacturer Part Number: dc025
• Description: Dc025 Dual-output-series Power Modules
• Manufacturer: Lineage Power

18 Vdc to 36 Vdc Input; 25 W
Test Configurations
A. Pinout A (DC025AJ-M, BK-M, CL-M) Configura-
B. Pinout B (DC025AA-M, AB-M, AF-M, BB-M,
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10
Note: Use a 0.1 µF ceramic capacitor. Scope measurement should
Figure 12. Output Noise Measurement Test Setup
tion
CC-M) Configuration
be made by using a BNC socket. Position the load between
50 mm and 75 mm (2 in. and 3 in.) from the module.
V
V
V
V
C OM M
V
V
O 1
O 1
O 2
O 2
O 1
O 2
( + )
( – )
( + )
( – )
(+ )
(– )
C OPP ER ST R IP
C OPP ER ST R IP
0.1 µF
0.1 µF
0. 1 µ F
0. 1 µ F
(continued)
SCOPE
SCOPE
SCOPE
SCOPE
R
R
R
R
LO AD1
LO AD2
LO AD1
LO AD2
8-808(C)
8-809(C)
Figure 13. Output Voltage and Efficiency Measure-
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. A 33 µF electrolytic capacitor (ESR < 0.7 ¾ at
100 kHz) mounted close to the power module helps
ensure stability of the unit.
Note: All measurements are taken at the module terminals. When
Pinout A
Pinout B
RESISTANCE
SUPPLY
CONTACT
socketing, place Kelvin connections at module terminals to
avoid measurement errors due to socket contact resistance.
I
ment Test Setup
I
η
η
=
=
J
------------------------------------------------------------- - x
V
V
∑
=
I
I
2
(+)
(–)
J
------------------------------------------------- -x
∑
1
2
=
[
[
1
[
V
V
V
[
I
OJ
COM
I
V
+ ( )
+ ( )
V
V
OJ
+ ( )
O1
O2
–
–
–
–
V
V
COM
I
V
I
– ( )
DISTRIBUTION LOSSES
– ( )
I
OJ
O
]
CONTACT AND
– ( )
]
Lineage Power
]
March 2008
I
I
I
I
I
OJ
]
I
OJ
100
LOAD
LOAD
8-863(C).a
100