LM27966 datasheet(10/20 Pages) TI1

Teilenummer	LM27966

Bauteilbeschribung	LM27966 White LED Driver with I2C Compatible Interface

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Hersteller	TI1 [Texas Instruments]

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1

bit7

1

bit6

1

bit5

1

bit4

1

bit3

1

bit2

DAUX-1

bit1

DAUX-0

bit0

MSB

LSB

DAUX Brightness Control

Register Address: 0xC0

1

bit7

1

bit6

1

bit5

Dx4

bit4

Dx3

bit3

Dx2

bit2

Dx1

bit1

Dx0

bit0

MSB

LSB

Main Display Brightness Control

Register Address: 0xA0

LM27966

SNVS448B – JULY 2006 – REVISED MAY 2013

www.ti.com

Figure 12. Brightness Control Register Description

Internal Hex Address: 0xA0 (Main Display), 0xC0 (DAUX)

NOTE

Dx4-Dx0: Sets Brightness for Dx pins (Main Display). 11111=Fullscale

Bit7 to Bit 5: Not Used

DAUX1-DAUX0: Sets Brightness for DAUX pin. 11 = Fullscale

Bit7 to Bit2:Not Used

Full-Scale Current set externally by the following equation:

IDx = 200 × 1.25V / RSET

Table 1. Brightness Level Control Table (Main Display)

Analog Current

Brightness Code (hex)

Duty Cycle (%)

Perceived Brightness Level (%)

(% of Full-Scale)

00

20

1/16

1.25

01

20

2/16

2.5

02

20

3/16

3.75

03

20

4/16

5

04

20

5/16

6.25

05

20

6/16

7.5

06

20

7/16

8.75

07

20

8/16

10

08

20

9/16

11.25

09

20

10/16

12.5

0A

20

11/16

13.75

0B

20

12/16

15

0C

20

13/16

16.25

0D

20

14/16

17.5

0E

20

15/16

18.75

0F

20

16/16

20

10

40

10/16

25

11

40

11/16

27.5

12

40

12/16

30

13

40

13/16

32.5

14

40

14/16

35

15

40

15/16

37.5

16

40

16/16

40

17

70

11/16

48.125

18

70

12/16

52.5

10

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