TYPICAL OPERATING WAVEFORMS
V in =12V, V o1 =2.5V, V o2 =1.8V, I o1 =0-20A, I o2 =0-20A Fs=350 kHz, 45 ° C, 200LFM Air Flow
87.6
87.4
87.2
87.0
86.8
86.6
86.4
86.2
86.0
85.8
85.6
85.4
85.2
85.0
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Output Current (Amps)
Fig.40: Efficiency of 1.8V channel versus load current with heat sink and 200LFM air flow at 45 ° C.
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Output Current (Amps)
Fig.41: Power loss of 1.8V channel versus load current with heat sink and 200LFM air flow at 45 ° C.
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