PIN 1 ID

1

24

7

18

19

20

21

22

23

2

3

4

5

6

8

9

10

11

12

13

14

15

16

17

PIN 1 ID

1

24

7

18

19

20

21

22

23

2

3

4

5

6

8

9

10

11

12

13

14

15

16

17

MCU or

PWM

generator

LP8543

SW

FB

GNDs

EN

ADR

PWM

FAULT

SCLK

SDA

OUT1

OUT2

OUT3

OUT4

OUT5

OUT6

L1

D1

10V ± 38V

5.5V ± 22V

ALSI

IF_SEL

15 PH

DISPLAY1

210 mA ± 400 mA

UP TO 60 LEDS

10 PF

4.7 PF

470 nF

OUT7

ALSO

LP8543

www.ti.com

SNVS604D – AUGUST 2009 – REVISED MARCH 2013

Typical Application, Stand-Alone Mode

Connection Diagrams

Figure 1. 24–pin WQFN Package Number

Figure 2. 24–pin WQFN Package Number

RTW0024A

RTW0024A

4.0 x 4.0 x 0.8mm, 0.5 mm pitch

4.0 x 4.0 x 0.8mm, 0.5 mm pitch

Bottom View

Top View

Pin Functions

Pin #

Name

Type

Description

1

GND_SW

G

Boost ground

2

PWM

I

PWM dimming input. This pin must be connected to GND if not

used.

3

IF_SEL

I

interface and IF_SEL=High for SMBus interface.

4

EN

I

Enable input pin

(1)

A: Analog Pin, G: Ground Pin, P: Power Pin, I: Input Pin, I/O: Input/Output Pin, O: Output Pin, OD: Open Drain Pin

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