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ACT4455 数据表(PDF) 11 Page - Active-Semi, Inc

部件名 ACT4455
功能描述  36V/5A Step Down DC/DC Converter
PDF  16 Pages
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制造商  ACTIVE-SEMI [Active-Semi, Inc]
网页  http://www.active-semi.com
标志 ACTIVE-SEMI - Active-Semi, Inc

ACT4455 数据表(HTML) 11 Page - Active-Semi, Inc

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ACT4455
Rev 2, 21-Nov-12
Innovative Power
TM
- 11 -
www.active-semi.com
Copyright © 2012 Active-Semi, Inc.
TYPICAL PERFORMANCE CHARACTERISTICS
(Circuit of Figure 7, RCS1 = RCS2 = 50mΩ, L = 18µH, CIN = 150µF, COUT = 680µF, TA = 25°C, unless otherwise specified.)
Input Voltage (V)
5
10
15
20
25
40
30
35
Switching Frequency vs. Input Voltage
250
200
150
100
50
0
Switching Frequency vs. Feedback Voltage
250
200
150
100
50
0
Feedback Voltage (mV)
0
0.2
0.4
0.6
0.8
1
Standby Current vs. Input Voltage
940
880
860
840
820
800
900
920
Input Voltage (V)
5
10
15
20
25
40
30
35
Maximum Peak Current vs. Duty Cycle
9
8.5
8
7.5
7
6.5
6
Duty cycle
0.15
0.25
0.35
0.45
0.55
0.65
0.75
0.85
12
10
8
6
4
2
0
14
Input Voltage (V)
5
10
15
20
25
30
35
40
Input Current vs. Input Voltage at No Load
Efficiency (%)
0
1000
2000
3000
4000
5000
90
80
70
60
50
100
Efficiency vs. Load current
VIN = 24V
VIN = 12V
VIN = 32V



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