Asia-Pacific
+86 755 298 85888
Europe, Middle East
+353 61 225 977
North America
+1 408 785 5200
© 2018 Bel Power Solutions & Protection
Fig. 7: Turn-on transient at full rated load current (resistive) with no
output capacitor at Vin = 48 V, triggered via ON/OFF pin. Top trace
ON/OFF signal (5 V/div.). Bottom trace: output voltage (2 V/div.)
Time scale: 2 ms/div.
Fig. 8: Turn-on transient at full rated load current (resistive) plus
10,000 µF at Vin = 48 V, triggered via ON/OFF pin. Top trace:
ON/OFF signal (5 V/div.). Bottom trace: output voltage (5
V/div.)Time scale: 2 ms/div
Fig. 9: Output voltage response to load current step-change (20 A
30 A – 20 A) at Vin = 48 V. Top trace: output voltage (100 mV/div.).
Bottom trace: load current (10 A/div.). Current slew rate: 0.1 A/µs
Co = 1 µF ceramic. Time scale: 0.2 ms/div
Fig. 10: Output voltage response to load current step-change (20 A
–30 A – 20 A) at Vin = 48 V. Top trace: output voltage (100
mV/div.).Bottom trace: load current (10 A/div.). Current slew rate: 5
A/µs. Co =470 µF POS + 1 µF ceramic. Time scale: 0.2 ms/div.
Fig. 11: Output voltage ripple (20 mV/div.) at full rated load current
into a resistive load with Co = 10 µF tantalum + 1 µF ceramic and
Vin = 48 V. Time scale: 1 µs/div.
Fig. 12: Test setup for measuring input reflected ripple currents,
ic and is.
Vout
Vsource
i
S
i
C
1 F
ceramic
capacitor
10 H
source
inductance
DC/DC
Converter
33 F
ESR <1
electrolytic
capacitor
QME Series
