MIC2860-D_11 Datasheet, PDF (4/12 Pages) Micrel Semiconductor – High Efficiency 2 Channel WLED Driver with Single Wire Digital Control

Micrel Inc.
Typical Characteristics
Dropout Voltage
vs. R_SET
70
60
50
40
LED1
30
LED2
20
10
0
5 10 15 20 25 30 35
RSET (kΩ)
Dropout Voltage
vs. Temperature
100
80
60
BL-31
40
20
BL-0
BL-11
BL-21
0
-40 -20
R_SET = 9.53kΩ
0 20 40 60 80 100 120
TEMPERATURE (°C)
LED Current
vs.Temperature
32.0
31.5
31.0
30.5
LED1-BL31
30.0
29.5
LED2-BL31
29.0
28.5
28.0
-40
R_SET = 9.53kΩ
-20 0 20 40 60 80 100
TEMPERATURE (°C)
Note: BL = Brightness Level
MIC2860-2D
Peak LED Current
vs. R_SET
35
30
25
20
15
10
5
0
8 12 16 20 24 28 32
RSET (kΩ)
Matching
vs. Temperature
0.50
0.45
R_SET = 9.53kΩ
0.40
0.35
0.30
BL-21
0.25
0.20
0.15
0.10
BL-31
BL-11
0.05
0.00
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
LED Current
vs. Temperature
22.0
21.5
21.0
20.5
LED1-BL21
20.0
19.5
LED2-BL21
19.0
18.5
18.0
-40 -20
R_SET = 9.53kΩ
0 20 40 60 80 100 120
TEMPERATURE (°C)
Dropout Voltage
vs. Brightness Level
125
100
75
LED2
50
25 ^LED1
R_SET = 9.53kΩ
0
0 5 10 15 20 25 30 35
BRIGHTNESS LEVEL
LED Current
vs. Temperature
11.0
10.9
10.8
10.7
10.6
LED2-BL11
10.5
10.4
LED1-BL11
10.3
10.2
10.1
10.0
-40 -20 0
R_SET = 9.53kΩ
20 40 60 80 100 120
TEMPERATURE (°C)
July 2010
4
M9999-072010-A