NCP3066 データシートの表示（PDF） - ON Semiconductor
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コンポーネント説明
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NCP3066
ON Semiconductor
NCP3066 Datasheet PDF : 20 Pages
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NCP3066, NCV3066
Figure 16. Buck with External Switch Demoboard Layout
Figure 17. Buck with External Switch Demoboard
Photo
90
350 mA 4 LED
85
(Vout = 12.8 V)
80
700 mA 4 LED
(Vout = 12.8 V)
75
70
700 mA 2 LED
65
(Vout = 6.4 V)
60
350 mA 2 LED
55
(Vout = 6.4 V)
50
10
15
20
25
30
35
INPUT VOLTAGE (V)
Figure 18. Efficiency of Buck LED Driver
95
90
85
3 A 4 LED
80
(Vout = 12.8 V)
75
70
65
3 A 2 LED
(Vout = 6.4 V)
60
55
10
15
20
25
30
35
INPUT VOLTAGE (V)
Figure 19. Efficiency of Buck LED Driver at Iout = 3 A
Figure 15, Buck Demoboard With External Switch
Application Schematic illustrates the NCP3066 being used
as a PFET controller. Table 1. Bill Of Materials shows the
small number of additional parts which are necessary to
assemble mentioned demoboard. The demoboard based on
two layer PCB and the layout is mentioned in Figure 16.
Buck Demoboard Layout. The Line regulation is mentioned
in Figure 20, Line Regulation. The Figure 21, Dimming
characteristic shows behavior of circuitry in case the square
wave signal with 5 V amplitude and 300 Hz frequency was
delivered into ON/OFF pin of device.
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