DatasheetsPDF.com

A6285

Allegro MicroSystems
Part Number A6285
Manufacturer Allegro MicroSystems
Description 16-Channel Constant-Current Latched LED Driver
Published Jan 12, 2009
Detailed Description A6285 16-Channel Constant-Current Latched LED Driver with Open LED Detection and Dot Correction Features and Benefits ▪...
Datasheet PDF File A6285 PDF File

A6285
A6285


Overview
A6285 16-Channel Constant-Current Latched LED Driver with Open LED Detection and Dot Correction Features and Benefits ▪ 3.
0 to 5.
5 V logic supply range ▪ Schmitt trigger inputs for improved noise immunity ▪ Power-On Reset (POR) ▪ Up to 80 mA constant-current sinking outputs ▪ LED open circuit detection (LOD) ▪ Dot correction (DC) for adjusting LED light intensity on each channel with 7-bit resolution ▪ Low-power CMOS logic and latches ▪ High data input rate up to 30 MHz ▪ Active output pull-ups with enable/disable ▪ 20 ns typical staggering delay between outputs ▪ Internal UVLO and thermal shutdown (TSD) circuitry ▪ Fault output flags for an LED open circuit (LOD) or a thermal shutdown (TSD) condition Package: 32 Contact QFN (suffix ET) 5 mm × 5 mm 0.
90 mm nominal overall height Not to scale Description The A6285 is designed for LED display applications.
This BiCMOS device includes an On/Off shift register, a Dot Correction (DC) shift register, accompanying data latches, and 16 MOS constant-current sink drivers with active pull-ups that can be enabled or disabled as required by the application.
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 CMOS serial data output permits cascading of multiple devices in applications requiring additional drive lines.
Individual LED light intensity can be adjusted to correct for light intensity variations by using the Dot Correction feature.
Open LED connections can be detected, and then signaled back to the host microprocessor through the serial data output (SDO pin).
The FAULT output flags an LED open circuit (LOD) condition or a thermal shutdown (TSD) condition.
Astaggering delay on the load outputs during ON/OFF transitions helps to reduce ground bounce.
Continued on the next page… Ty...


Similar Datasheet


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)