MIC3263 Datasheet, PDF (7/32 Pages) Micrel Semiconductor – Six-Channel WLED Driver for Backlighting Applications with Flicker-Free Dimming

Micrel, Inc.
Typical Characteristics
Dimming Efficiency
vs. Input Voltage
95
100% PWMD
72% PWMD
52% PWMD
90
85
37% PWMD
80
27% PWMD 19% PWMD
75
70
6
11
16
INPUT VOLTAGE (V)
ILED @30mA
vs. Temperature
30.4
Ch2 _Ch3
30.2
Ch6
30.0
29.8
29.6
29.4
29.2
Ch1
Ch4
Ch5
29.0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
% Change in ILED @15mA
vs. Temperature
0.80
0.60
Ch3
Ch2
Ch6
0.40
0.20
0.00
-0.20
-0.40
Ch5
Ch4
-0.60
Ch1
-0.80
-1.00
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
ILEDs vs. Input Voltage
30.5
30.4
30.3
30.2
30.1
Ch4
Ch1
Ch5
30.0
29.9
Ch2
29.8
Ch6
29.7
Ch3
29.6
29.5
5
10
15
20
INPUT VOLTAGE (V)
% Change in ILED@30mA
vs. Temperature
1.00
0.80
0.60
0.40
0.20
Ch1
Ch5
Ch4
0.00
-0.20
Ch3
Ch2
-0.40
-0.60
Ch6
-0.80
-1.00
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
VDD Voltage
vs. Input Voltage
5.00
4.90
25°C
4.80
4.70
4.60
4.50
5
10
15
20
INPUT VOLTAGE (V)
January 2010
7
MIC3263
% Change in ILEDs
vs. Input Voltage
2.0
1.5
Ch3
1.0
0.5
0.0
-0.5
-1.0
-1.5
5
Ch2
Ch1
Ch5
Ch6
Ch4
10
15
20
INPUT VOLTAGE (V)
ILED @15mA
vs. Temperature
15.30
Ch6
15.25 _Ch3
15.20
15.15
15.10
15.05
Ch5
Ch1
Ch4
15.00
Ch2
14.95
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Switching Frequency
vs. Input Voltage
950
940
930
920
25°C
910
900
5
10
15
20
INPUT VOLTAGE (V)
M9999-012110