點晶科技股份有限公司

SILICON TOUCH TECHNOLOGY INC

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3-CHANNEL CONSTANT CURRENT LED DRIVERS

Version:A.003

Page 3

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DM412

Pin Connection

Pin Description

PIN No.

PIN NAME

FUNCTION

SOP16/SSOP16/TSSOP16: 1

QFN16: 15

DAO

Serial data output terminal.

SOP16/SSOP16/TSSOP16: 2

QFN16: 16

CKO

Clock output terminal.

SOP16/SSOP16/TSSOP16: 3

QFN16: 1

STO

Strobe output terminal.

SOP16/SSOP16/TSSOP16: 4

QFN16: 2

POL

PWM current output polarity selection:

‘H’ means DM412 is to be LED driver,

‘L’ means DM412 is to be PWM generator.

SOP16/SSOP16/TSSOP16: 5~7

QFN16: 3~5

R(G、B)OUT

Sink constant current outputs (open-drain).

SOP16/SSOP16/TSSOP16: 8

QFN16: 9

GND

Ground terminal.

SOP16/SSOP16/TSSOP16: 9~11

QFN16: 6~8

R(G、B)REXT

External resistors connected between R(G、B)REXT and GND for driver

current value setting.

SOP16/SSOP16/TSSOP16: 12

QFN16: 10

SDO

*1

Serial data output trigger mode selection:

‘H’ means data is shifted out on synchronization to falling edge of CKO,

‘L’ means data is shifted out on synchronization to rising edge of CKO.

SOP16/SSOP16/TSSOP16: 13

QFN16: 11

STI

Input terminal of data strobe:

‘H’ means data is latched,

‘L’ means data on shift register goes through latch (level latch).

SOP16/SSOP16/TSSOP16: 14

QFN16: 12

CKI

Synchronous clock input terminal for serial data transfer. Data is sampled at

the rising edge of CKI.

SOP16/SSOP16/TSSOP16: 15

QFN16: 13

DAI

Serial data input terminal.

SOP16/SSOP16/TSSOP16: 16

QFN16: 14

VCC

Power supply terminal.

1

4

5

8

13

16

12

9

QFN16

(bottom view)

2

3

6

7

10

14

15

11

CKO

BOUT

RREXT

BREXT

GREXT

DAI

VCC

DAO