DRV593_15 Datasheet, PDF (6/27 Pages) Texas Instruments – 3−A HIGH−EFFICIENCY PWM POWER DRIVER

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