MIC2870 データシートの表示（PDF） - Micrel
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MIC2870 Datasheet PDF : 25 Pages
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Micrel, Inc.
Typical Characteristics (Continued)
Torch Mode ILED(MAX)
Accuracy vs. Input Voltage
2.5
2.0
RTRSET = 75kΩ RTRSET = 82kΩ
1.5
RTRSET = 62kΩ
RTRSET = 51kΩ
1.0
0.5
0.0
RTRSET = 39kΩ
-0.5
RTRSET = 30kΩ
-1.0
RTRSET = 20kΩ
RTRSET = 10kΩ
-1.5
-2.0
-2.5
3.5
3.7
3.9
4.1
4.3
INPUT VOLTAGE (V)
Boost Switching Frequency
vs. Input Voltage
2.20
2.15
-40°C
25°C
2.10
2.05
2.00
75°C
1.95
125°C
1.90
1.85
L = 1 µH
COUT = 2.2µF
ILED1+ ILED2 = 1.5A
1.80
2.5
3.0
3.5
4.0
4.5
INPUT VOLTAGE (V)
MIC2870
WLED Output Power Efficiency
vs. Input Voltage
100
90
80
ILED = 1.5A
ILED = 1.2A
70
ILED = 780mA
ILED = 375mA
60
L = 1µH
COUT = 2.2µF
TA = 25°C
50
ILED = 150mA
2.6 3.0 3.4 3.8 4.2 4.6 5.0
INPUT VOLTAGE (V)
September 5, 2013
8
Revision 1.0
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