A6282

Description

TheA6282deviceisdesignedforLEDdisplayapplications.This

CMOS device includes an input shift register, accompanying

data latches, and 16 MOS constant current sink drivers.

The CMOS shift registers and latches allow direct interfacing

with microprocessor-based systems. With a 3.3 or 5 V logic

supply, typical serial data input rates can reach up to 30 MHz.

The LED drive current level can be set by a single external

resistor, selected by the application designer. A serial data

output permits cascading of multiple devices in applications

requiring additional drive lines.

The A6282 is available in two 24-terminal packages: QFN

(package ES) and TSSOP (LP), which have an exposed

thermal pad. Both packages are lead (Pb) free with 100% matte

tin leadframe plating.

Applications include the following:

▪ Monocolor, multicolor, or full-color LED display

▪ Monocolor, multicolor, or full-color LED signboard

▪ Display backlighting

▪ Multicolor LED lighting

6282-DS, Rev. 4

Features and Benefits

▪ 16 constant-current outputs, up to 50 mA each

▪ LED output voltage up to 12 V

▪ 3.0 to 5.5 V logic supply range

▪ Schmitt trigger inputs for improved noise immunity

▪ Power-On Reset (POR), all register bits = 0

▪ Low-power CMOS logic and latches

▪ High data input rate: 30 MHz

▪ Output current accuracy: between channels < ±3% and

between ICs ±7%, over the full operating temperature

range

▪ Internal UVLO and thermal shutdown (TSD) circuitry

16-Channel Constant-Current LEDDriver

Typical Application

Controller

CLK

LE

SDO

REXT

A6282

IC 1

A6282

IC 2

OE

SDI

SDI

10 μF

100 nF

OUT0

OUT15

CLK

LE

OE

CLK

LE

OE

REXT

100 nF

10 μF

OUT0

OUT15

SDO

SDI

GND

GND

VDD

VDD

Not to scale

24-contact QFN

4 mm × 4 mm × 0.75 mm

(Package ES)

24-pin TSSOP

with exposed thermal pad

(Package LP)

Cascaded A6282 devices

Packages: