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RT8474A датащи(PDF) 8 Page - Richtek Technology Corporation

номер детали RT8474A
подробное описание детали  High Voltage Multiple-Topology LED Driver
PDF  13 Pages
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производитель  RICHTEK [Richtek Technology Corporation]
домашняя страница  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT8474A датащи(HTML) 8 Page - Richtek Technology Corporation

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RT8474A
8
DS8474A-05 April 2015
www.richtek.com
©
Copyright
2015 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
Efficiency vs. Input Voltage
50
55
60
65
70
75
80
85
90
95
100
5
10152025
3035404550
Input Voltage (V)
LED = 6pcs
LED = 5pcs
LED = 4pcs
LED = 3pcs
LED = 2pcs
LED = 1pcs
IOUT = 340mA, L = 47
μH
ISP-ISN Threshold vs. Temperature
70
80
90
100
110
120
-50
-25
0
25
50
75
100
125
Temperature (°C)
Typical Operating Characteristics
Supply Current vs. VCC
1.90
1.95
2.00
2.05
2.10
2.15
2.20
2.25
2.30
0
5
10
15
20
25
30
35
40
45
50
VCC (V)
ICC
LED Current vs. VCTL
0
50
100
150
200
250
300
350
400
450
0
0.5
1
1.5
2
2.5
3
VCTL (V)
RSENS = 300m
Ω, LED = 6pcs
SW RDS(ON) vs. VCC
0.170
0.172
0.174
0.176
0.178
0.180
0
5
10
15
20
25
30
35
40
45
50
VCC (V)
VCC = 24V
VCC = 24V
SW RDS(ON) vs. Temperature
0.14
0.18
0.22
0.26
0.30
-50
-25
0
25
50
75
100
125
Temperature (°C)
VCC = 24V



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