DRV590_16 Datasheet, PDF (6/18 Pages) Texas Instruments – 1.2-A HIGH-EFFICIENCY PWM POWER DRIVER

DRV590
SLOS365A – AUGUST 2001 – REVISED AUGUST 2002
TYPICAL CHARACTERISTICS
EFFICIENCY
vs
LOAD RESISTANCE
90
85 ^{VDD = 3.3 V}
PO = 0.25 W
80
75
PO = 0.5 W
70
65
60
55
50
2 3 4 5 6 7 8 9 10
RL – Load Resistance – Ω
Figure 2
POWER SUPPLY REJECTION RATIO
vs
FREQUENCY
–40
–45
–50
–55
–60
–65
–70
–75
–80
1
10
100
1k
10k
f – Frequency – Hz
Figure 4
EFFICIENCY
vs
LOAD RESISTANCE
90
VDD = 5 V
85
PO = 2 W
PO = 1 W
80
PO = 0.5 W
75
70
65
60
2 3 4 5 6 7 8 9 10
RL – Load Resistance – Ω
Figure 3
SMALL-SIGNAL DRAIN-SOURCE
ON-STATE RESISTANCE
vs
SUPPLY VOLTAGE
0.8
IO = 0.5 A
0.7
0.6
rds(on) Low Side
0.5
rds(on) High Side
0.4
0.3
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
VDD – Supply Voltage – V
Figure 5
6
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