16-bit Constant Current LED Driver with Error Detection

Version:A.002

Page 4

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DM13G

Pin Description

PIN No.

PIN NAME

FUNCTION

SSOP28/TSSOP28: 1

QFN32: 28

VCC

Supply voltage terminal.

SSOP28/TSSOP28: 2

QFN32: 30

ENB

Output enable terminal:

‘H’ for all outputs are turned off ,

‘L’ for all outputs are active.

SSOP28/TSSOP28: 3

QFN32: 31

LAT

Input terminal of data strobe. Data on shift register goes through at the

rising edge of LAT (edge trigger). Otherwise, data is latched.

SSOP28/TSSOP28: 4

QFN32: 32

CLK

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

at the rising edge of CLK.

SSOP28/TSSOP28: 5

QFN32: 1

DAI

Serial data input terminal.

SSOP28/TSSOP28: 6

QFN32: 26

MODE

Serial data input selection:

‘L’ for output channel on/off data (SD Mode),

‘H’ for 7-bit global brightness data and 3-bit error function selection

(CD Mode)

SSOP28/TSSOP28:

7~22

QFN32: 3~4,6~9,

11~14,16~19,21~22

OUT0~15 Sink constant-current outputs (open-drain).

SSOP28/TSSOP28: 23

QFN32: 24

DAO

Serial data output terminal.

SSOP28/TSSOP28: 24

QFN32: 25

ALARM

Output open drain terminal: (connected to a pull-high resistor)

‘H’ for normal conditions,

‘L’ for LED open/short, outputs short to GND or chip overheated.

SSOP28/TSSOP28: 25

NA

Not used

SSOP28/TSSOP28: 26

QFN32: 27

REXT

External resistors connected between REXT and GND for output current

value setting.

SSOP28/TSSOP28: 27

QFN32: 2,23

VLED

Connect to VLED to eliminate ghost image.

SSOP28/TSSOP28: 28

Thermal pad

QFN32: 5,10,15,20,29

Thermal pad

GND

Ground terminal.