RT8511B Datasheet, PDF (6/11 Pages) Richtek Technology Corporation – 43V Asynchronous Boost WLED Driver

RT8511B
Typical Operating Characteristics
100
95
90
85
80
75
70
65
60
4
Efficiency vs. Input Voltage
VOUT = 29.5V
7 9 12 14 17 19 22 24
Input Voltage (V)
FB Reference Voltage vs. Temperature
200
198
196
194
192
190
-20
3.0
VIN = 4.5V
5
30
55
80
105
Temperature (°C)
Current Limit vs. Input Voltage
2.6
2.2
1.8
1.4
1.0
2.5 5.25
8 10.75 13.5 16.25 19 21.75 24.5
Input Voltage (V)
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6
FB Reference Voltage vs. Input Voltage
199.5
199.2
198.9
198.6
198.3
198.0
4
600
8
12
16
20
24
Input Voltage (V)
Frequency vs. Input Voltage
550
500
450
400
350
4
8
12
16
20
24
Input Voltage (V)
LED Current vs. PWM Duty Cycle
60
50
40
PWM = 100Hz
30
PWM = 2kHz
PWM = 8kHz
20
10
0
0 10 20 30 40 50 60 70 80 90 100
PWM Duty Cycle (%)
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DS8511B-05 February 2015