Ver2.1

3

LD1024

16-Channel, Constant-Current LED Driver with LED Open Detection

SSOP-24

(TOP VIEW)

GND

DIN

CLK

STROBE

OUT0

OUT1

OUT2

OUT3

OUT4

OUT5

OUT6

OUT7

VDD

REXT

DOUT

OEB

OUT15

OUT14

OUT13

OUT12

OUT11

OUT10

OUT9

OUT8

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

LD1024

Pin No.

Pin Name

Description

1

GND

GND terminal for control logic and current sink

2

DIN

Serial data input terminal for shift register

3

CLK

Clock input terminal for data shift to up-edge

4

STROBE

Edge triggered latch. The data in the on/off control data shift register are transferred to the on/off control

data latch at this rising edge. At the same time, the data in the on/off control shift register are replaced with

LED open detection (LOD) and pre-thermal warning (PTW) data.

Strobe must be toggled only once after the shift data are updated to avoid the on/off control latch data

being replaced with LOD and PTW data in the shift register.

24

VDD

Supply voltage terminal

5~20

OUT[0:15]

Constant current output terminals

21

OEB

Output enable terminal

When OEB is low, the output drivers are enabled; when OEB is high, all output drivers are turned off

22

DOUT

Serial data output to the following D

23

REXT

Input terminal used to connect an external resistor for setting up output current for all output channels. It

must connect register between REXT and GND.

PIN CONNECTION

TERMINAL DESCRIPTION