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DATA SHEET
Figure 11. Test setup for measuring input reflected ripple currents, ic and is.
i S
10 ? H
i C
source
inductance
V source
33 ? F
ESR < 1 ?
electrolytic
capacitor
SQE48
DC-DC
Converter
1 ? F
ceramic
capacitor
Vout
Figure 12. Input reflected-ripple current, iS (10 mA/div.), measured
Figure 13. Input reflected ripple-current, iC (100 mA/div.), measured
through 10 μ H at the source at full rated load current and Vin = 48 V. at input terminals at full rated load current and Vin = 48 V.
Refer to Figure 11 for test setup. Time scale: 1 μ s/div.
Figure 14. Output voltage vs. load current showing current limit
point and converter shutdown point. Input voltage has almost no
effect on current limit characteristic.
Refer to Figure 11 for test setup. Time scale: 1 μ s/div.
Figure 15. Load current (top trace, 50 A/div., 50 ms/div.) into a
10 m? short circuit during restart, at Vin = 48 V. Bottom trace
(50 A/div., 5 ms/div.) is an expansion of the on-time portion of
the top trace.
SQE48T40015 DC-DC Converter
12
www.power-one.com
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