SC4541

13

Schematic (Buck)

LED9

LED10

VIN2

C5

1uF * 3pcs

LED16

LED17

U1

SC4541

IN

1

GND

2

SW

3

OUT

4

FB

5

EN

6

12V

12V

C3

OPT

C2

1uF

(1) L1: Murata LQH3NPN100MM0L

(2) C2,C5: Murata GRM188R7YA105K

L1

10uH

R1

1

R5

10K

VIN

Applications Information ( continued)

Figure 2 — Typical Application Schematic, Buck Topology

Efficiency (Buck)

12Vin, 2LED, Buck topology

60

65

70

75

80

85

0

20

40

60

80

100

120

140

160

180

200

Output Current(mA)

Schematic (Buck, High Efficiency Option)

< High Efficiency Option >

LED9

LED10

VIN2

C5

1uF * 3pcs

LED16

LED17

U1

SC4541

IN

GND

SW

OUT

FB

EN

3.3V

12V

C2

1uF

L1

10uH

R1

1

R5

10K

(2) C2, C3,C5: Murata GRM188R7YA105K

VIN

(1) L1: Murata LQH3NPN100MM0L

C3

1uF

Figure 3 — Typical Application Schematic, High Efficiency of Buck Topology

< High Efficiency Option >

12Vin, 2LED, Buck topology

60

65

70

75

80

85

90

0

20

40

60

80

100

120

140

160

180

200

Output Current(mA)

Efficiency (Buck, High Efficiency Option)