A6285EET-T

A6285EET-T Datasheet

A6285

Part	Datasheet
A6285EET-T	A6285EET-T (pdf)

Related Parts	Information
A6285EETTR-T	A6285EETTR-T

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A6285 16-Channel Constant-Current Latched LED Driver with Open LED Detection and Dot Correction to 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 x 5 mm nominal overall height Not to scale 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 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 VLED VLED Controller SDI FAULT CLK LE MODE OE 100 KΩ SDI FAULT CLK LE MODE OE PE OUT0 A6285 10 uF OUT15 SDO VDD 100 nF REXT SDO A6285 16-Channel Constant-Current Latched LED Driver with Open LED Detection and Dot Correction Description continued The device is available in a 32-lead QFN package ET , with an exposed thermal pad. It is lead Pb free with 100% matte tin leadframe plating. Applications include the following Display backlighting Monocolor, multicolor, or full-color LED display Monocolor, multicolor, LED Signboard Multicolor LED lighting Selection Guide Part Number A6285EET-T A6285EETTR-T Package 5x5 mm QFN, 32 pin, exposed thermal pad 5x5 mm QFN, 32 pin, exposed thermal pad Packing estimated 73 pieces per tube 1500 pieces per 7-in reel Absolute Maximum Ratings Characteristic Notes Min. Max. Unit

PDF Datasheet Preview

A6285
16-Channel Constant-Current Latched LED Driver with Open LED Detection and Dot Correction
to 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 x 5 mm nominal overall height

Not to scale

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 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

VLED

VLED

Controller

SDI FAULT

CLK LE MODE OE
100 KΩ

SDI FAULT

CLK LE MODE OE

PE OUT0 A6285
10 uF

OUT15

SDO VDD
100 nF

REXT SDO

A6285
16-Channel Constant-Current Latched LED Driver with Open LED Detection and Dot Correction

Description continued The device is available in a 32-lead QFN package ET , with an exposed thermal pad. It is lead Pb free with 100% matte tin leadframe plating.

Applications include the following Display backlighting Monocolor, multicolor, or full-color LED display Monocolor, multicolor, LED Signboard Multicolor LED lighting

Selection Guide

Part Number A6285EET-T A6285EETTR-T

Package 5x5 mm QFN, 32 pin, exposed thermal pad 5x5 mm QFN, 32 pin, exposed thermal pad

Packing estimated 73 pieces per tube 1500 pieces per 7-in reel

Absolute Maximum Ratings

Characteristic

Notes

Min.

Max.

Unit

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Datasheet ID: A6285EET-T 516051