MIC3201_11 Datasheet, PDF (4/16 Pages) Micrel Semiconductor – High Brightness LED Driver with High-Side Current Sense

Micrel, Inc.
Typical Characteristics
90
80
70
60
50
40
30
20
10
0
5
1 LED Efficiency
vs. Input Voltage
1A
350mA
10
15
20
INPUT VOTLAGE (V)
2 LED Current
vs. Input Voltage
1200
1000
1A
800
600
400
350mA
200
0
5
10
15
20
INPUT VOTLAGE (V)
800
700
600
500
400
300
200
100
0
5
Switching Frequency
vs. Input Voltage
R_CS = 0.2Ω
L = 22µH
T_A = 25°C
10
15
20
INPUT VOLTAGE (V)
Current Sense Voltage
vs. Input Voltage
250
V_CS(Max)
200
150
V_{CS(M i n)}
100
50
0
5
10
15
20
INPUT VOLTAGE (V)
February 2011
MIC3201
100
90
80
70
60
50
40
30
20
10
0
5
2 LED Efficiency
vs. Input Voltage
1A
350mA
10
15
20
INPUT VOTLAGE (V)
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
5
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
5
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
0
Supply Current
vs. Input Voltage
TA = 25°C
10
15
20
INPUT VOLTAGE (V)
Enable Threshold
vs. Input Voltage
T_A = 25°C
10
15
20
INPUT VOLTAGE (V)
VCC
vs. ICC
T_A = 25°C
5
10
15
20
ICC (mA)
4
1200
1 LED Current
vs. Input Voltage
1000
1A
800
600
400
350mA
200
0
5
10
15
20
INPUT VOTLAGE (V)
0.050
0.045
0.040
0.035
0.030
0.025
0.020
0.015
0.010
0.005
0.000
5
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
5
Shutdown Current
vs. Input Voltage
T_A = 25°C
10
15
20
INPUT VOLTAGE (V)
VCC
vs. Input Voltage
TA = 25°C
10
15
20
INPUT VOLTAGE (V)
350
300
250
200
150
100
50
0
0
Switch Voltage
vs. Switch Current
T_A = 25°C
0.25 0.5 0.75
1
SWITCH CURRENT (A)
M9999-021011-B