Micrel, Inc.
Typical Characteristics
MAQ3203
100
Efficiency
vs Input Voltage
100
Efficiency
vs Input Voltage
1.03
1.02
Normalized LED Currents
vs Input Voltage
90
80
4LED
6LED
8LED
10LED
90
80
4LED
6LED
8LED
10LED
1.01
1
0.99
1LED
2LED
4LED
6LED
8LED
10LED
70
70
60
L=150μH
ILED=1A
60
L=68μH
ILED=1A
0.98
0.97
L=150μH
ILED=1A
0
5
10
15
20
25
30
35
40
45
0
5
10
15
20
25
30
35
40
45
0
5
10
15
20
25
30
35
40
45
1.03
INPUT VOLTAGE (V)
Normalized LED Currents
vs. Input Voltage
350
INPUT VOLTAGE (V)
Frequency
vs. Input Voltage
700
INPUT VOLTAGE (V)
Frequency
vs. Input Voltage
1.02
1.01
L=68μH
ILED=1A
300
250
L=150μH
ILED=1A
4LED
600
500
L=68μH
ILED=1A
4LED
1
200
400
2LED
1LED
150
2LED
300
0.99
0.98
2LED
4LED
6LED
8LED
10LED
100
50
1LED
6LED
8LED
10LED
200
100
1LED
6LED
8LED
10LED
0.97
0
0
0
5
10
15
20
25
30
35
40
45
0
5
10
15
20
25
30
35
40
45
0
5
10
15
20
25
30
35
40
45
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
100
Duty Cycle
vs. Input Voltage
100
Duty Cycle
vs Input Voltage
1.4
Supply Current
vs. Input Voltage
10LED
10LED
1.2
75
50
1LED
2LED
4LED
8LED
6LED
75
50
1LED
2LED
4LED
8LED
6LED
1.0
0.8
TA = 25°C
ILED = 0A
0.6
25
0
L=150μH
ILED=1A
25
0
L=68μH
ILED=1A
0.4
0.2
0.0
0
5
10
15
20
25
30
35
40
45
0
5
10
15
20
25
30
35
40
45
0
5
10
15
20
25
30
35
40
45
March 2011
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
5
INPUT VOLTAGE (V)
M9999-032411-A
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