Linear Technology DC1878A Demo Manual page 4

DEMO MANUAL DC1878A
Quick start proceDure
Figure 3. Efficiency and Power Loss at Full Load. The Power Loss is Highest at High Input
Voltage Due to the Switching Losses and Drops as Input Voltage Decreases, Until the Inductor
Current Starts to Increase as the Circuit Enters Boost Mode Below 10V Input Voltage
4
10
9
8
7
6
5
4
I
3
IN
2
1
0
0 10 20 30
INPUT VOLTAGE (V)
Figure 2. Input Current at Full Load (12V at 5A Output)
100
98
96
94
92
90
88
86
84
0 10 20 30
INPUT VOLTAGE (V)
I
OUT
40 50 60 70
η%
P
LOSS
40 50 60 70
80
8
7
6
5
4
3
2
1
0
80
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