SC4541
5Vin,
Applications Information ( continued) LEDs 6S1P
Efficiency 5Vin, LEDs
R5
10K
5Vin 6S1P LED
VIN
5V
C3
IN
U1
EN
75
70
L1
10uH
1uF
GND
SW
SC4541
OUT
FB
R1
10 ?
C2
1uF
65
60
55
C5
1uF
50
45
LED28
LED27
LED26
LED25
LED24
LED23
0
5
10
15
20
ILED(mA)
LEDs: EVERLIGHT EHP-109/UB31H-PU5/TR
L1: Murata LQH3NPN100NG0L
C1, C2, C5: Murata GRM21BR71H105K
Efficiency(LEDs
LEDs 1S2P, 200mA
Figure 4 — Typical Application Schematic, Floating Buck-Boost Topology
VIN
6V to 22V
L1
C3
1uF
IN
GND
R5
10K
SC4541
U1
EN
OUT
R1
10 ?
C2
1uF
65
63
61
1S2P LED, 200mA
22uH
SW
C5
LED9
4.7uF
FB
59
57
55
3
6
9
12
15
18
21
24
LED10
Vin(V)
LEDs: EVERLIGHT EHP-109/UB31H-PU5/TR
L1: Cooper SD52-220-R
C1, C2: Murata GRM21BR71H105K
C5: Murata GRM31CR71H475K
Figure 5 — Typical Application Schematic, Floating Buck-Boost Topology
14
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