JBW030-Series Power Module: dc-dc Converters
36-75 Vdc Input; 3.3 Vdc and 5 Vdc Outputs; 30 W
Data Sheet
March 27, 2008
Characteristic Curves (continued)
Test Configurations
TO OSCILLOSCOPE
CURRENT
PROBE
LTEST
VI(+)
12 µH
S 220 µF
C
IMPEDANCE < 0.1 Ω
@ 20 ˚C, 100 kHz
BATTERY
VI(-)
8-489(C)
Note: Input reflected-ripple current is measured with a simulated
source impedance of 12 µH. Capacitor CS offsets possible
battery impedance. Current is measured at the input of the
module.
Figure 11. Input Reflected-Ripple Test Setup
TIME, t (0.2 ms/div)
1-0882
COPPER STRIP
Figure 9. JBW030A Typical Output Voltage for a
Step Load Change from 50% to 25%
VO(+)
RESISTIVE
LOAD
0.1 µF
SCOPE
VO(–)
100
8-513(C)
Note:Use a 0.1 µF ceramic capacitor. Scope measurement should
be made using a BNC socket. Position the load between
50 mm and 75 mm (2 in. and 3 in.) from the module.
80
40
Figure 12. Peak-to-Peak Output Noise
Measurement Test Setup
SENSE(+)
CONTACT AND
DISTRIBUTION LOSSES
VI (+)/CASE VO (+)
IO
I I
TIME, t (10 ms/div)
LOAD
SUPPLY
8-733a
VI(–)
VO (–)
Figure 10. Typical Output Voltage Start-Up when
Signal Applied to Remote On/Off
CONTACT
RESISTANCE
SENSE(–)
8-749(C).a
Note:All measurements are taken at the module terminals. When
socketing, place Kelvin connections at module terminals to
avoid measurement errors due to socket contact resistance.
[VO(+) – VO(–)] IO
[VI(+) – VI(–)] II
⎛
⎝
⎞
⎠
----------------------------------------------------
η =
× 100
%
Figure 13. Output Voltage and Efficiency
Measurement Test Setup
Lineage Power
7
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
