MIC2292_11 Datasheet, PDF (4/10 Pages) Micrel Semiconductor – High Frequency PWM White LED Drivers with Internal Schottky Diode and OVP

Micrel, Inc.
Typical Characteristics
MIC2292C 3 Series LED
Efficiency
86
81
76
V = 3.0 V
71
IN
66
V = 3.6 V
61
IN
V = 4.2 V
56
IN
51
L = 10µH
46
C = 1µF
41
OUT
360 _{2 4 6 8 10 12 14 16 18 20}
I_LED (mA)
MIC2293C 6 Series
LED Efficiency
83
V = 4.2 V
IN
78
V = 3.6 V
73
IN
V = 3.0 V
68
IN
63
58
L = 10µH
53
C = 1µF
OUT
480 _{2 4 6 8 10 12 14 16 18 20}
I_OUT (mA)
Quiescent Current
vs. Input Current
5
4
3
2
1
0
02468
V_IN (V)
10 12
Schottky Forward
Voltage Drop
700
600
500
400
300
200
100
0
SCHOTTKY FORWARD VOLTAGE DROP (mV)
September 2009
MIC2293C 3 Series LED
Efficiency
86
81
76
V = 3.0 V
71
IN
66
V = 3.6 V
61
IN
V = 4.2 V
56
IN
51
L = 10µH
46
C = 1µF
41
OUT
360 _{2 4 6 8 10 12 14 16 18 20}
I_LED (mA)
Feedback Voltage
vs. Input Voltage
100
99
98
97
96
95
94
93
92
91
90
02468
10 12
V_IN (V)
Switch Frequency
vs. Temperature
1.4
1.2
1.0
0.8
0.6
0.4
0.2
-040 -20 02 04 06 08 0 100
TEMPERATURE (°C)
Schottky Reverse
Leakage Current
2.5
2
1.5
V_R = 25V
1
V_R = 16V
0.5
030
V_R = 10V
40 50 60 70 80 90 100
TEMPERATURE (°C)
4
MIC2292/93C
MIC2292C 6 Series
LED Efficiency
83 V = 4 . 2 V
IN
78
V = 3.6 V
73
IN _{V = 3 . 0 V}
IN
68
63
58
L = 10µH
53
C = 1µF
OUT
480 _{2 4 6 8 10 12 14 16 18 20}
I_LED (mA)
Shutdown Voltage
vs. Input Voltage
5
4
3
2
1
0
02468
V_IN (V)
10 12
EN Pin Bias Current
vs. Temperature
50
45
40
35
I = 10V
30 ^EN
25
20
15
I = 4.2V
EN
10
I = 3.6V
EN
5 _{I = 3.0V}
-050^EN
05
0
100
TEMPERATURE (°C)
Saturation Voltage
vs. Temperature
550
500
450
400
350
30-040
I_SW = 500mA
04
08
0 120
TEMPERATURE (°C)
M9999-091509-A