JAW050A and JAW075A Power Modules; dc-dc Converters:
36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W
Data Sheet
April 2008
Characteristic Curves (continued)
Test Configurations
TO OSCILLOSCOPE
CURRENT
PROBE
LTEST
VI(+)
12 μH
CS 220 μF
ESR < 0.1 Ω
@ 20 °C, 100 kHz
33 μF
BATTERY
ESR < 0.7 Ω
@ 100 kHz
VI(–)
8-203(F).l
Note: Measure input reflected-ripple current with a simulated source
inductance (LTEST) of 12 µH. Capacitor CS offsets possible bat-
tery impedance. Measure current as shown above.
3.7 A
Figure 11. Input Reflected-Ripple Test Setup
TIME, t (200 ms/div)
COPPER STRIP
8-3333(F)
VO(+)
Note: Tested without any load capacitance.
RESISTIVE
LOAD
1.0
μF
10
μF
SCOPE
Figure 9. Typical JAW075A Transient Response to
Step Decrease in Load from 50% to 25%
of Full Load at Room Temperature and
48 Vdc Input (Waveform Averaged to
Eliminate Ripple Component.)
VO(–)
8-513(F).d
Note: Use a 1.0 µF ceramic capacitor and a 10 µF aluminum or tan-
talum 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.
Figure 12. Peak-to-Peak Output Noise
Measurement Test Setup
SENSE(+)
CONTACT AND
DISTRIBUTION LOSSES
VI(+)
VI(–)
VO(+)
II
IO
LOAD
SUPPLY
VO(–)
CONTACT
RESISTANCE
SENSE(–)
8-749(F)
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.
TIME, t (5 ms/div)
1-0099
[VO(+) – VO(–)]IO
[VI(+) – VI(–)]II
⎛
⎝
⎞
⎠
------------------------------------------------
η =
x 100
%
Note: Tested without any load capacitance.
Figure 10. JAW075A1 Typical Start-Up from
Remote On/Off; IO = IO, max
Figure 13. Output Voltage and Efficiency
Measurement Test Setup
Lineage Power
7
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
