MIC2282 Datasheet, PDF (4/10 Pages) Micrel Semiconductor – Single-Cell Ultra Low EMI Boost LED Driver

Micrel, Inc.
Typical Characteristics
1 LED Efficiency
85
50mA
80
75
10mA
25mA
70
65
60
55
500 _{0.5 1 1.5 2 2.5 3 3.5}
INPUT VOLTAGE (V)
Oscillator Frequency
vs. Temperature
30
V = 1.5V
IN
I = 100mA
SW
25
20
15
200
175
150
125
100
75
50
25
0
0
TEMPERATURE (¡C)
Quiescent Current
vs. Supply Volage
–40°C
+25°C
+85°C
2 4 6 8 10
SUPPLY VOLTAGE (V)
2 LED in Series Efficiency
90
85 _100mA
80
50mA
10mA
75
70
65
60
55
50
012345
INPUT VOLTAGE (V)
Oscillator Duty Cycle
vs. Temperature
75
V = 1.5V
IN
70
I = 100mA
SW
65
60
55
50
TEMPERATURE (°C)
Current Limit
vs. Input Voltage
1.6
1.4
1.2
1
0.8
0.6
0.4
0.23 _{3.5 4 4.5 5 5.5 6}
INPUT VOLTAGE (V)
MIC2282
3 LED in Series Efficiency
90
50mA ^100mA
85
80
10mA
75
70
65
60
55
50
0123456
INPUT VOLTAGE (V)
Quiescent Current
vs. Temperature
200
V = 1.5V
IN
175
150
125
100
75
50
TEMPERATURE (°C)
Output Current Limit
vs. Temperature
1.75
1.50
1.25
1.00
0.75
0.50
0.25
0
TEMPERATURE (°C)
October 2009
4
M9999-102309