Datasheet

C1
PWM
H/C
R
L
L1
L1 = 10 µH (part number: CDRH104R, manufacturer: Sumida)
C1 = 10 µF (part number: ECJ-4YB1C106K, manufacturer: Panasonic)
0
10
20
30
40
50
60
70
80
90
100
1 2 3 4 5 6 7 8 9 10
P
O
= 2 W
P
O
= 1 W
P
O
= 0.5 W
Efficiency − %
R
L
− Load Resistance − Ω
V
DD
= 5 V
f
S
= 500 kHz
1 2 3 4 5 6 7 8 9 10
P
O
= 1 W
P
O
= 0.5 W
P
O
= 0.25 W
Efficiency − %
R
L
− Load Resistance − Ω
0
10
20
30
40
50
60
70
80
90
100
V
DD
= 3.3 V
f
S
= 500 kHz
DRV593
DRV594
SLOS401C –OCTOBER 2002–REVISED JULY 2010 www.ti.com
TEST SETUP FOR GRAPHS
The LC output filter used in Figure 2, Figure 3, Figure 8, and Figure 9 is shown below.
Figure 1. LC Output Filter
EFFICIENCY EFFICIENCY
vs vs
LOAD RESISTANCE LOAD RESISTANCE
Figure 2. Figure 3.
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