A6282 Datasheet, PDF (1/13 Pages) Allegro MicroSystems – 16-Channel Constant-Current LED Driver

A6282
16-Channel Constant-Current LED Driver
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
Packages:
24-pin TSSOP
with exposed thermal pad
(Package LP)
Not to scale
24-contact QFN
4 mm × 4 mm × 0.75 mm
(Package ES)
Description
TheA6282 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
SDI
CLK
Controller
LE
OE
Typical Application
V_LED
10 μF
OUT0
OUT15
SDI
SDO
SDI
CLK
V_DD
VDD
CLK
LE
A6282
100 nF
LE
GND
OE
OE
REXT
IC 1
10 μF
OUT0
A6282
OUT15
SDO
V_DD
VDD
100 nF
GND
REXT
IC 2
6282-DS, Rev. 4
Cascaded A6282 devices