JBW050F Power Modules: dc-dc Converter;
36 to 75 Vdc Input, 3.3 Vdc Output; 33 W
Data Sheet
September 20, 2004
Characteristic Curves (continuted)
TIME, t (5 ms/div)
1-0704
Note: Tested with a 10 µF aluminum and a 1.0 µF ceramic capacitor
across the load.
TIME, t (100 µs/div)
1-0702
Figure 7. Typical Start-Up from Remote On/Off;
Note: Tested with a 10 µF aluminum and a 1.0 µF ceramic capacitor
across the load.
IO = IO, max
Figure 5. Typical Transient Response to Step
Decrease in Load from 50% to 25% of
Full Load at Room Temperature and 48 V
Input (Waveform Averaged to Eliminate
Ripple Component.)
Test Configurations
TO OSCILLOSCOPE
CURRENT
PROBE
LTEST
VI(+)
12 µH
CS 220 µF
ESR < 0.1 Ω
@ 20 °C, 100 kHz
33 µF
ESR < 0.7 Ω
@ 100 kHz
BATTERY
VI(–)
8-203.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.
Figure 8. Input Reflected-Ripple Test Setup
TIME, t (100 µs/div)
1-0703
Note: Tested with a 10 µF aluminum and a 1.0 µF ceramic capacitor
across the load.
Figure 6. Typical Transient Response to Step
Increase in Load from 50% to 75% of Full
Load at Room Temperature and
48 V Input (Waveform Averaged to
Eliminate Ripple Component.)
6
Tyco Electronics Power Systems
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
