Datasheet

2
Atmel MSL2010 [DATASHEET]
42072A–AVR–05/2013
1. Introduction
The MSL2010 LED string driver features a constant off-time Boost Controller and provides very accurate, no ripple, linear
controlled string current. The Atmel patent-pending Efficiency Optimizer (EO) controls the switch-mode converter output,
optimizing the output voltage to achieve maximum power efficiency. Both the switching and linear controllers drive
external MOSFETs to provide flexibility over a wide range of power levels (LED currents and voltages) and extremely low
LED ripple current.
The MSL2010 operates from a 9.5V to 15V power supply. The Boost controller voltage regulation loop uses a constant
off-time control algorithm to achieve stable control with good transient behavior. For flexibility of design, off-time is set
with an external resistor. External loop compensation offers additional flexibility for the Boost Controller.
An I
2
C interface provides access to the control registers, and to 32 bytes of RAM. Integrated non-volatile EEPROM
memory, also accessed through the I
2
C serial interface, allows configuration at final test in the case that the factory
default settings must be modified.
The MSL2010 is available in the space-saving 24-pin 4x4mm QFN package and operates over the extended -40°C to
105°C operating range.
2. Ordering Information
Note: 1. Lead-Free, Halogen-Free, RoHS Compliant Package
3. Application Circuit
Ordering code Description Package
(1)
MSL2010 One String LED Driver with DC-DC Controller 4 x 4mm 24-pin QFN
G
DRV
AVIN
12V
AGND
SDA SCL
CONFIGURATION INTERFACE
MSL2010
LED DRIVER
REXT
CS
PWM
PWM
+
-
R
S
FBO
EN
WHITE
LEDS
PGND
R
TOP
R
BOTTOM
D
PVIN
VCC
VDD
TOFF
S
(OPTIONAL)
46.4k
R
TOFF
10uF
10uF
1uF
L
C
IN
R
CS
D
FB
EAO
R
D
Q1
R
C
C
C2
C
C1
Q1
C
OUT