16-Channel Constant-Current Latched LED Driver

with Open LED Detection and Dot Correction

A6285

4

Allegro MicroSystems, Inc.

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

24

23

22

21

20

19

18

17

1

2

3

4

5

6

7

8

SDO

PE

OUT15

OUT14

PGND

OUT13

OUT12

OUT11

PAD

SDI

NC

OUT0

OUT1

PGND

OUT2

OUT3

OUT4

Terminal List Table

Name

Number

Description

O¯¯E¯

30

Output Enable input. Active low. When O¯¯E¯ = High, all OUTx outputs are forced OFF. When O¯¯E¯ = Low,

ON/OFF of OUTx outputs are controlled by input data.

GND

29

Logic supply ground.

PE

23

= disabled.

REXT

27

Reference current input/output terminal.

MODE

26

Logic input, Mode select. When MODE = Low, then SDI, SDO, CLK, LE are connected to ON/OFF control

logic. When MODE = High, SDI, SDO, CLK, LE are connected to dot-correction logic.

NC

2

No connection. Not internally connected.

OUT0

3

Constant current outputs.

OUT1

4

OUT2

6

OUT3

7

OUT4

8

OUT5

9

OUT6

11

OUT7

12

OUT8

13

OUT9

14

OUT10

16

OUT11

17

OUT12

18

OUT13

19

OUT14

21

OUT15

22

PGND

5, 10, 15, 20

Power ground.

CLK

32

Data shift clock input. Note that the internal connections are switched by input at MODE pin. At CLK↑, the

shift-registers selected by MODE shift the data.

SDI

1

Serial Data In. Data input of serial data interface.

SDO

24

Serial Data Out. Data output of serial data interface.

VDD

28

Logic Supply.

FAULT

25

Error output. FAULT is open drain terminal. FAULT goes low when LOD or TSD detected.

LE

31

Latch Enable input. Note that the internal connections are switched by input at the MODE pin. At LE↑, the

latches selected by MODE get new data.

PAD

–

Exposed pad for enhanced thermal dissipation; not connected internally, connect to power ground plane.

Pin-out Diagram