MIC3205 Datasheet, PDF (6/23 Pages) Micrel Semiconductor – High-Brightness LED Driver Controller with Fixed-Frequency Hysteretic Control

Micrel, Inc.
Typical Characteristics (Continued)
Enable Bias Current
vs. Enable Voltage
100
V_EN ≠ V_IN
T_A = 25°C
80
I_LED = 0A
V_IN = 42V
60
40
20
0
0
9
18
27
36
45
ENABLE VOLTAGE (V)
V_IN Shutdown Current
vs. Temperature
2.0
V_IN = 12V
I_LED = 0A
1.6 V_EN = 0V
1.2
0.8
0.4
0.0
-50 -25 0 25 50 75 100 125
TEMPERATURE (°C)
V_CC
vs. Temperature
6.0
V_IN = 12V
I_LED = 1A
5.5
5.0
4.5
4.0
-50
-25 0 25 50 75
TEMPERATURE (°C)
100 125
Thermal Shutdown
vs. Input Voltage
200
RISING
160
120
I_LED = 1A
80
FALLING
40
0
0
HYST
9
18
27
36
45
INPUT VOLTAGE (V)
I_LED Output Current
vs. Temperature
1.03
1.02
V_IN = 12V
V_LED = 3.5V
R_CS = 0.2Ω
1.01
1.00
0.99
0.98
-50 -25 0 25 50 75 100 125
TEMPERATURE (°C)
Enable Threshold
vs. Temperature
1.6
V_IN = 12V
I_LED = 1A
1.2
RISING
0.8
FALLING
0.4
HYST
0.0
-50 -25 0
25 50 75 100 125
TEMPERATURE (°C)
MIC3205
V_IN Supply Current
vs. Temperature
2.0
V_IN = 12V
I_LED = 0A
1.8
1.6
1.4
1.2
1.0
-50 -25 0
25 50 75 100 125
TEMPERATURE (°C)
Switching Frequency
vs. Temperature
530
V_IN = 12V
510
V_LED = 3.5V
L = 22µH
C_T = 470pF
R_CS = 0.2Ω
490
470
450
430
-50 -25 0 25 50 75 100 125
TEMPERATURE (°C)
Enable Bias Current
vs. Temperature
30
V_IN = 12V
I_LED = 0A
V_EN = 12V
25
20
15
10
-50 -25 0 25 50 75 100 125
TEMPERATURE (°C)
October 2012
6
M9999-102312-A