LP3936

32 31 30 29 28 27 26 25

1

2

3

4

5

6

7

8

24

23

22

21

20

19

18

10 11 12 13 14 15 16 17

9

FB

GND2

WLED3

WLED4

WLED1

WLED2

RT

NRST

CS

DO

DI

MW_SEL

LP3936

32

31

30

29

28

27

26

25

1

2

3

4

5

6

7

8

24

23

22

21

20

19

18

10

11

12

13

14

15

16

17

9

FB

GND2

WLED3

WLED4

RT

NRST

CS

DO

DI

MW_SEL

WLED1

WLED2

LP3936

SNVS259D – NOVEMBER 2003 – REVISED MAY 2013

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DESCRIPTION (CONTINUED)

An efficient magnetic boost converter provides the required bias operating from a single Li-Ion battery. The

DC/DC converter output voltage is user programmable for adapting to different LED types and for efficiency

16 internal registers.

Connection Diagrams and Package Mark Information

32-Lead TLGA Package, 4.5 x 5.5 x 0.8 mm, 0.5 mm pitch

Figure 1. TLGA Package – Top View

Figure 2. TLGA Package – Bottom View

See Package Number NPC0032A

Pin Description

Pin

Name

Type

Description

1

GND_BOOST

Ground

Power Switch Ground

2

FB

Input

Boost Converter Feedback

3

Power

Supply Voltage for Internal Digital Circuits

4

GND2

Ground

5

WLED1

LED Output

Open Drain, White LED1 Output

6

WLED2

LED Output

Open Drain, White LED2 Output

7

WLED3

LED Output

Open Drain, White LED3 Output

8

WLED4

LED Output

Open Drain, White LED4 Output

9

GND_WLED

Ground

4+2 White LED Driver Ground

10

WLED5

LED Output

Open Drain, White LED5 Output

11

WLED6

LED Output

Open Drain, White LED6 Output

12

Output

Internal LDO Output, 2.8V

13

GND1

Ground

14

Power

Supply Voltage for Internal Analog Circuits

15

AIN

Input

Ambient Light Sensor Input

16

AREF

Output

Reference Voltage for Ambient Light Sensor, 1.23V

17

GND_T

Ground

Ground

18

Output

Internal Reference Bypass Capacitor

19

RT

Input

Oscillator Resistor

20

MW_SEL

Logic Input

2

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