NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.69 Vdc - 5.5 Vdc /12 A Outputs
December 2, 2010
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
CURRENT PROBE
Test Configurations
Input Reflected Ripple Current Test Setup.
TO OSCILLOSCOPE
L
TEST
1μH
V
IN
(+)
BATTERY
C
S
1000μF
Electrolytic
E.S.R.<0.1Ω
@ 20°C 100kHz
C
IN
2x100μF
Tantalum
COM
NOTE: Measure input reflected ripple current with a simulated
source inductance (L
TEST
) of 1μH. Capacitor C
S
offsets
possible battery impedance. Measure current as shown
above.
Output Ripple and Noise Test Setup
COPPER STRIP
RESISTIVE
LOAD
0.1uF
COM
SCOPE USING
BNC SOCKET
GROUND PLANE
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
10uF
Vo+
Output Voltage and Efficiency Test Setup
R
distribution
R
contact
V
IN
(+)
V
O
R
contact
R
distribution
V
IN
V
O
R
LOAD
R
distribution
R
contact
COM
COM
R
contact
R
distribution
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
V
O
. I
O
Efficiency
η
=
V
IN
. I
IN
x
100 %
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
•
Tel 201-432-0463
•
Fax 201-432-9542
•
www.belfuse.com
11
BEL [ BEL FUSE INC. ]
