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RT8489 Datasheet(PDF) 8 Page - Richtek Technology Corporation

Part # RT8489
Description  High Voltage 4-CH LED Driver Controller
PDF  16 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT8489 Datasheet(HTML) 8 Page - Richtek Technology Corporation

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RT8489
8
DS8489-00 November 2012
www.richtek.com
©
Copyright 2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
Typical Operating Characteristics
Supply Current vs. Input Voltage
0
1
2
3
4
5
6
7
8
9
10
4
8
12
16
20
24
28
Input Voltage (V)
Switching Frequency vs. Input Voltage
200
280
360
440
520
600
680
760
840
4
8
12
16
20
24
28
Input Voltage (V)
RSET = 20k
Ω
RSET = 30k
Ω
RSET = 10k
Ω
LED Current vs. ACTL PWM Duty
0
50
100
150
200
250
0
2040
6080
100
ACTL PWM Duty (%)
VIN = 24V, RSx = 0.9
Ω
LED1
LED2
LED3
LED4
Efficiency vs. Input Voltage
0
10
20
30
40
50
60
70
80
90
100
8
1216
202428
Input Voltage (V)
4 x 10LEDs, ILED = 100mA
(k
Ω)
Frequency vs. RSET Resistance
100
200
300
400
500
600
700
800
900
1000
10
20
30
40
50
60
70
80
90
100 110
RSET
VIN = 24V
LED Current vs. Input Voltage
80
90
100
110
120
10
13
16
19
22
25
Input Voltage (V)
LED1
LED2
LED3
LED4
RSx = 2.2
Ω



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