ACT4455 Ver la hoja de datos (PDF) - Active-Semi, Inc
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ACT4455 Datasheet PDF : 14 Pages
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ACT4455
Rev 2, 21-Nov-12
TYPICAL PERFORMANCE CHARACTERISTICS
(Circuit of Figure 7, RCS1 = RCS2 = 50mΩ, L = 18µH, CIN = 150µF, COUT = 680µF, TA = 25°C, unless otherwise specified.)
100
90
80
70
60
50
0
Efficiency vs. Load current
VIN = 12V
VIN = 32V
VIN = 24V
1000
2000
3000
Efficiency (%)
4000 5000
Switching Frequency vs. Feedback Voltage
250
200
150
100
50
0
0
0.2
0.4
0.6
0.8
1
Feedback Voltage (mV)
Switching Frequency vs. Input Voltage
250
200
150
100
50
0
5
10
15
20
25
30
35 40
Input Voltage (V)
Maximum Peak Current vs. Duty Cycle
9
8.5
8
7.5
7
6.5
6
0.15 0.25 0.35 0.45 0.55 0.65 0.75 0.85
Duty cycle
Standby Current vs. Input Voltage
940
920
900
880
860
840
820
800
5
10 15 20 25 30 35 40
Input Voltage (V)
Input Current vs. Input Voltage at No Load
14
12
10
8
6
4
2
0
5
10
15
20
25
30
35 40
Input Voltage (V)
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