MP3393—8-STRING WHITE LED DRIVER WITH STEP-UP CONTROLLER

MP3393 Rev. 1.05

www.MonolithicPower.com

16

3/26/2013

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2013 MPS. All Rights Reserved.

TYPICAL APPLICATION CIRCUIT

0

R3

10

R1

NC

C6

VIN1

GND

FF

EN

DIM

C2

JP1

NC

C3

C1

F1

L1

B360

D1

470pF

C8

C4

C7

C5

357k

R2

10k

R5

100PF

C10

R4

LED

LED1

LED2

LED3

LED4

LED5

LED6

LED7

LED8

10

R17

10

R7

2k

R27

20k

R28

2k

R19

20k

R23

10k

R8

C11

0

R12

C12

0.05

R13

NC

R14

10V-28V

10S 8P 200mA/string

AM4499P

M1

4.7nF

C9

NC

R10

M2

M3

300

R11

470pF

C13

VIN

1

VCC

2

COMP

3

OSC

4

EN

5

DIM

6

FB1

7

CTL1

8

FB2

9

CTL2

10

FB3

11

CTL3

12

FB4

13

CTL4

14

CTL5

15

FB5

16

CTL6

17

FB6

18

CTL7

19

FB7

20

CTL8

21

FF

23

OVP

24

GND

25

ISENSE

26

GATE

27

VFAULT

28

FB8

22

MP3393EF

*1

MP3393EF

NC

C14

100k

R18

Q1

0

R6

1

R15

10

R22

Q2

0

R9

1

R20

10

R37

Q6

0

R30

1

R35

10

R26

Q3

0

R16

1

R24

10

R31

Q4

0

R21

1

R29

10

R34

Q5

0

R25

1

R32

10

R39

Q7

0

R33

1

R38

10

R41

Q8

0

R36

1

R40

Figure 4: Driving 8 LED Strings