Datasheet

13
Atmel MSL3080 Datasheet
8 String 60mA LED Driver with Integrated Boost Controller
8.0 Detailed Description
The MSL3080 is an LED driver with eight internal current regulators, each capable of driving up to 60mA LED current. They feature an integrated
boost regulator controller with a proprietary Efciency Optimizer voltage control algorithm that lowers power use to the minimum required to
assure LED current regulation. The driver outputs allow parallel connection to increase string current, at the expense of the number of strings,
and a single resistor sets the current for all strings. The drivers support 12-bit PWM LED dimming ratios. The driver synchronizes LED dimming
and controls duty cycle with a single external digital signal at the PWM input.
The MSL3080 includes comprehensive fault monitoring and automatic fault handling. Automatic fault handling allows the drivers to operate
without any microcontroller or FPGA, while optional control via I
2
C allows customized fault handling and driver control for more complex
applications. All drivers also feature optional register-set PWM dimming, fault management and other controls via the I
2
C serial interface; for
interface information see the “MSL3040/50/60/80/86/87/88 Programming Guide”.
The small 4x4mm VQFN package allows a small overall LED driver solution, while maintaining high package power dissipation for high output
power capability
8.1 LED Driver Comparison
Table 8.1. LED Driver Comparison with Similar Parts
PART
NUMBER
OF LED
STRINGS
MAX
CURRENT
PER
STRING
PHASE
SHIFTED
STRING
DRIVERS
INTERNAL
BOOST
CONTROLLER
RESISTOR SET
LED SHORT
CIRCUIT
THRESHOLD
SEPARATE
SYNC
INPUT*** BEST FOR
MSL3086 8 60mA YES YES YES NO MONITOR, INDUSTRIAL PANEL
MSL3087* 8 60mA YES NO YES NO SMALL TV
MSL3088 8 60mA YES YES NO YES SMALL TV
MSL3080
8 60mA NO YES YES NO MONITOR, INDUSTRIAL PANEL
4** 120mA NO YES YES NO MONITOR, INDUSTRIAL PANEL
2** 240mA NO YES YES NO MONITOR, INDUSTRIAL PANEL
1** 480mA NO YES YES NO MONITOR, INDUSTRIAL PANEL
MSL3040* 4 120mA YES YES YES NO MONITOR, AUTOMOTIVE
MSL3041* 4 120mA YES YES YES YES MONITOR, AUTOMOTIVE
MSL3050*
5 60mA NO YES YES NO INDUSTRIAL PANEL
1** 300mA NO YES YES NO INDUSTRIAL PANEL
MSL3060*
6 60mA NO YES YES NO MONITOR, INDUSTRIAL PANEL
3** 120mA NO YES YES NO MONITOR, INDUSTRIAL PANEL
2** 180mA NO YES YES NO MONITOR, INDUSTRIAL PANEL
1** 360mA NO YES YES NO MONITOR, INDUSTRIAL PANEL
* Future product, contact factory for information.
** Drivers without phase shift allow parallel connection of string drive outputs for increased string current.
*** Drivers with separate SYNC input expect two control signals, one for dimming duty cycle and one for dimming frequency.