MIC2873 Datasheet, PDF (6/24 Pages) Micrel Semiconductor – 1.2A High-Brightness Flash LED Driver with Single-Wire Serial Interface

Micrel, Inc.
Typical Characteristics (Continued)
WLED Power Efficiency
100 ^{vs. Input Voltage (VF = 3.8V)}
90
80 _{ILED =1.2A}
I_LED =1.0A
I_LED =600mA
70
I_LED =400mA
I_LED =250mA
60 _{L = 1µH}
C_OUT = 4.7µF
LED V_F = 3.8V
I_LED =100mA
50
2.6 3.0 3.4 3.8 4.2 4.6 5.0
INPUT VOLTAGE (V)
Full Torch ILED Accuracy
vs. Input Voltage
10
8
6
4
T_A = 115°C T_A = 25°C
2
0
-2
T_A = -40°C
-4
-6
F_SW = 2MHz
-8
I_LED = 300mA
-10
2.5
3
3.5
4
4.5
5
5.5
INPUT VOLTAGE (V)
MIC2873
Full Flash ILED Accuracy
vs. Input Voltage
10
8
6
4
T_A = 25°C T_A = 115°C
2
0
-2
T_A = -40°C
-4
-6
-8
-10
2.5
F_SW = 2MHz
I_LED = 1.2A
3
3.5
4
4.5
5
5.5
INPUT VOLTAGE (V)
July 17, 2014
6
Revision 1.0