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Atmel LED Drivers-MSL3163/MSL3164

General Description

The Atmel LED Drivers-

MSL3163 and MSL3164

compact, high-power LED

string drivers use internal

current control MOSFETs to

sink up to 100mA per string,

with current accuracy and

matching better than 3%. The

MSL3163/4 drive 16 parallel

strings of ten white LEDs

each, for a total of 160 white

LEDs per device. Sixteen

interconnected devices control

up to 2560 white LEDs.

Atmel LED Drivers-MSL3163 and MSL3164

16-string White & RGB LED Drivers with Adaptive Power

Control, E²PROM, and SPI/I²C/SMBus Serial Interface

The MSL3163/4 adaptively controls the DC-DC converters that power the

LED strings, using Atmel's Adaptive SourcePower technology. These Efficiency

Optimizers minimize power use while maintaining LED current accuracy.

The MSL3164 features a 20 MHz SPI serial interface, and the MSL3163 offers

LED string intensity control for up to 16 interconnected devices to allow active

area dimming. The devices include an advanced PWM engine that easily

synchronizes to a video signal, and per-string phase adjustment to reduce

unwanted LCD artifacts such as motion blur. Additionally, an on-chip E²PROM

allows the power-up defaults to be customized through the serial interface.

A unique combination of peak current control and pulse width management

offer simple full screen brightness control, versatile area dimming and

a consistent white point. One external resistor provides the global peak

reference current for all LED strings, and global peak current fine-tuning is

available through an 8-bit register. Global string drive pulse width is adjusted

with an 8-bit global intensity register, and individual string pulse width is

modulated with 12-bit registers.

The MSL3163/4 feature fault monitoring of open circuit, short circuit, loss

of video sync and over temperature conditions, and provides a fault output

to notify the system controller. Detailed fault status and control are available

through the serial interface.

The MSL3163/4 are offered in a 6 x 6 x 0.75mm, 40-pin TQFN package and

operate over the -40°C to 85°C temperature range.

Applications

Long Life, Efficient LED Backlighting For:

Channel Signs

Architectural Lighting

Ordering Information

16-CHANNEL LED STRING DRIVERS

PART

INTERFACE

PACKAGE

MSL3163BT

40 pin, 6 x 6 x 0.75mm TQFN

MSL3164BT

SPI interface

40 pin, 6 x 6 x 0.75mm TQFN