RT8560 Datasheet, PDF (8/15 Pages) Richtek Technology Corporation – High Voltage 4 Channel LED Driver

RT8560
Typical Operating Characteristics
100
90
80
70
60
50
40
30
20
10
0
8
Efficiency vs. Input Voltage
60LEDs
12 16 20 24 28 32 36 40
Input Voltage (V)
24
23
22
21
20
19
18
17
16
-40
LED Current vs. Temperature
VIN = 12V
-15 10 35 60 85 110 135
Temperature (°C)
1.25
1.24
1.23
1.22
1.21
1.20
1.19
1.18
1.17
1.16
1.15
8
V_RISET vs. Input Voltage
12 16 20 24 28 32 36 40
Input Voltage (V)
www.richtek.com
8
26
24
22
20
18
16
14
12
10
8
LED Current vs. Input Voltage
LED1
LED2
LED3
LED4
12 16 20 24 28 32 36 40
Input Voltage (V)
V_RISET vs. Temperature
1.24
1.22
1.20
1.18
1.16
1.14
1.12
1.10
-40 -20 0
VIN = 12V
20 40 60 80 100 120
Temperature (°C)
LED Current vs. ACTL PWM Duty Cycle
20
18
16
14
12
ACTL = 200Hz
ACTL = 1kHz
10
ACTL = 10kHz
8
ACTL = 20kHz
ACTL = 30kHz
6
4
2
ACTL = 0V to 3V, VIN = 12V
0
00% 10% 2200% 303%0 4400% 5500% 6600% 707%0 8800% 9900% 100
Duty Cycle (%)
%
DS8560-01 April 2011