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CAT37 Datasheet(PDF) 4 Page - ON Semiconductor

Part # CAT37
Description  CMOS White LED Driver Boost Converter
PDF  11 Pages
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

CAT37 Datasheet(HTML) 4 Page - ON Semiconductor

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CAT37
http://onsemi.com
4
TYPICAL CHARACTERISTICS
(VIN = 3.6 V, TAMB = 25°C, CIN = 4.7 mF, COUT = 1 mF, L = 6.8 mH, unless otherwise specified.)
Figure 2. LED Current vs. Input Voltage
Figure 3. LED Current vs. Temperature
INPUT VOLTAGE (V)
TEMPERATURE (°C)
6
5
4
3
2
0
10
20
30
75
100
50
25
0
−25
−50
14.0
14.5
15.0
15.5
16.0
Figure 4. FB Pin Voltage vs. LED Current
Figure 5. FB Pin Voltage vs. Temperature
LED CURRENT (mA)
TEMPERATURE (°C)
20
15
10
5
0
80
85
90
95
100
105
110
100
75
50
25
0
−25
−50
80
85
90
95
100
Figure 6. Switching Frequency vs. Input
Voltage
Figure 7. Switching Frequency vs.
Temperature
INPUT VOLTAGE (V)
TEMPERATURE (°C)
6
5
4
3
2
1
0.8
0.9
1.0
1.1
1.2
1.3
100
75
50
25
0
−25
−50
0.8
0.9
1.0
1.1
1.2
3 LEDs
20 mA
10 mA
4 LEDs
3 LEDs
4 LEDs at 15 mA
VIN = 3.6 V
4 LEDs
1.3
LOAD = 20 mA
LOAD = 3 LEDs
VIN = 3.6 V



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