Ver1.0

3

LD1022

16 Channel Constant Current LED Driver

DESCRIPTION

LD1022 is designed for LED displays with output current gain control. LD1022 contains a serial buffer and

data latches, which convert serial input data into parallel output format. At LD1022 output stage, sixteen

regulated current ports are designed to provide constant current sinks for driving LEDs within a wide

range of Vf variations.

FEATURES

• 16 constant current output channels

• Constant current output range: 5mA ~ 70mA

• Output current adjustable through an external resistor

• 8-bit programmable output current control

• Output current accuracy:

- between channels: ±1.0% (25mA < Iout < 70mA)

±1.3% (3mA < Iout < 24mA)

- between ICs :

±3.0%

• 25MHz clock frequency

• Fast response of output current, Pulse width: 50nS

• 3V ~ 5V supply voltage

• Pb-free Package: SSOP24 (150) with two kinds of pin assignments

PIN CONNECTION (TOP VIEW)

GND

SDI

CLK

LE

OUT0

OUT1

OUT2

OUT3

OUT4

OUT5

OUT6

OUT7

VDD

R-EXT

SDO

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

BLOCK DIAGRAM

ORDERING INFORMATION

-40°C to 85 °C

24 SOP

LD1022-SP

-40°C to 85 °C

24 SSOP

LD1022-SS

TA

PACKAGE

PART NUMBER