NCV3066 ON Semiconductor, NCV3066 Datasheet - Page 11

• Manufacturer Part Number: NCV3066
• Manufacturer: ON Semiconductor

Figure 19. Efficiency of Buck LED Driver at I
Figure 16. Buck with External Switch Demoboard Layout
90
85
80
75
70
65
60
55
50
95
90
85
80
75
70
65
60
55
10
10
Figure 18. Efficiency of Buck LED Driver
700 mA 2 LED
(V
out
15
15
= 6.4 V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
20
20
3 A 2 LED
(V
350 mA 4 LED
(V
out
out
= 6.4 V)
3 A 4 LED
(V
= 12.8 V)
25
25
out
350 mA 2 LED
(V
= 12.8 V)
out
= 6.4 V)
700 mA 4 LED
(V
out
30
30
= 12.8 V)
out
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= 3 A
35
35
11
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.
Figure 15, Buck Demoboard With External Switch
Figure 17. Buck with External Switch Demoboard
Photo