A6282
Description
The A6282 device is designed for LED display applications. 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 LED Driver
Typical Application
Controller
CLK
LE
SDO
REXT
A6282
IC 1
A6282
IC 2
OE
SDI SDI
10 μF
100 nF
OUT0 OUT15
V
LED
V
DD
CLK
LE
OE
CLK
LE
OE
REXT
100 nF
V
DD
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:
