The document announces Atmel's launch of three new two-channel LED drivers - the MSL2021, MSL2023, and MSL2024. These drivers provide accurate color control for two-color LED light engines to deliver high quality light with high color rendering index. They offer the most efficient power management and lowest component count for high CRI LED lamps. The drivers control one white and one color LED string to precisely control white color at different color temperatures. They also feature temperature compensation, I2C interface, and dimming options to provide flexibility and control. Pricing starts at $3.10, $2.74, and $2.52 respectively for the three models.

1. ⎯ More ⎯
Atmel Corporation • 1600 Technology Drive • San Jose CA 95110 • Phone (408) 441-0311 • Fax (408) 487-2600
N E W S R E L E A S E
Atmel Launches Unique Two-Channel
LED Drivers for High CRI Professional and Consumer Lamps
MSL2021/23/24 Devices Deliver High Light Quality for Warm White High Color Rendering Index (CRI) LED Lamps with
Industry’s Most Efficient Power Management and Lowest Component Count
Strategies in Light, Santa Clara, CA, February 12, 2013 - Atmel®
Corporation (NASDAQ: ATML), a
leader in microcontroller (MCU) and touch solutions, today announced three new two-channel solid
state lighting (SSL) LED drivers that provide accurate color control for two-color LED light engines. In
addition, the LED drivers deliver the most efficient power management, with the lowest component
count, for high CRI LED lamps.
Ideal for applications including general lighting, residential and commercial lighting, architectural
lighting, and mood lighting, the LED drivers consist of the Atmel MSL2021, MSL2023, MSL2024; all
can be accompanied with an Atmel AVR®
MCU or ARM®
processor-based MCU for a complete
system solution in a variety of luminaires and lamp configurations.
The new MSL2021/23/24 LED devices have several distinct advantages when compared to existing
LED drivers:
- The devices drive one dominant LED string with a linear controller and one color LED string
with a low-side buck controller to achieve the target correlated color temperature (CCT)
coordinate, and replicate the color spectrum to attain a high CRI value.
- The devices have a look-up table in the EEPROM so designers can program accurate profiles
to follow the desired CCT compensation curve, lowering the overall bill of materials (BOM)
cost.
- The linear controller for white LEDs in the device family adaptively controls the headroom of
any AC/DC or DC/DC, isolated or non-isolated topology, while external MOSFETs give
designers the flexibility of choosing LED currents and LED string lengths.
- There are several dimming options and I2C interface for additional flexibility and control.

2. ATMEL NEWS RELEASE February 12, 2013
Atmel Corporation • 1600 Technology Drive • San Jose CA 95110 • Phone (408) 441-0311 • Fax (408) 487-2600
“White point control of an LED lamp is a key challenge for designing high-performance general,
architectural or mood lighting,” said Tushar Dhayagude, Director of LED Products, Atmel Corporation.
“The MSL2021/23/24 LED devices address this key issue by enabling the control of two strings,
typically comprising of white and red or amber LEDs, to provide precise white color control, while
providing extraordinary power efficiency, flexibility and wide power levels for the lamps.”
Key features for the three new devices include:
• MSL2021 -- the first LED driver with integrated temperature compensation for the color
LED string
• MSL2023 -- offering I2C serial port and internal pulse-width modulation (PWM) generators
• MSL2024 -- featuring individual PWM input pins
Pricing and Availablity
The new devices are available now. Pricing for 1,000-piece quanties follows:
• MSL2021 starts at USD $3.10
• MSL2023 starts at USD $2.74
• MSL2024 starts at USD $2.52
To accelerate a design, evaluation kits are also available through your local sales representative. The
new kits include an isolated AC/DC power supply, an integrated LED load board with one white and
red LED string, and an on-board AVR MCU to I2C to USB/parallel bridge for programming the LED
driver.
More Information
Atmel MSL2021/23/24 LED Drivers:
www.atmel.com/Microsite/msl2021_msl2023_msl2024_led_drivers/default.aspx
Atmel YouTube Channel: www.atmel.com/youtube
Embedded Design Blog: www.atmelcorporation.wordpress.com
Twitter: www.atmel.com/twitter
LinkedIn: www.atmel.com/linkedin
Facebook: www.atmel.com/facebook

3. ATMEL NEWS RELEASE February 12, 2013
Atmel Corporation • 1600 Technology Drive • San Jose CA 95110 • Phone (408) 441-0311 • Fax (408) 487-2600
About Atmel
Atmel Corporation (Nasdaq: ATML) is a worldwide leader in the design and manufacture of
microcontrollers, capacitive touch solutions, advanced logic, mixed-signal, nonvolatile memory and
radio frequency (RF) components. Leveraging one of the industry's broadest intellectual property (IP)
technology portfolios, Atmel is able to provide the electronics industry with complete system solutions
focused on industrial, consumer, communications, computing and automotive markets.
© 2013 Atmel Corporation. All Rights Reserved. Atmel®, Atmel logo and combinations thereof, AVR
®
, and others are
registered trademarks, or trademarks of Atmel Corporation or its subsidiaries. ARM
®
is a registered trademark of ARM Ltd.
Other terms and product names may be trademarks of others.
Disclaimer
No representation or warranties are made concerning third-party patents with regard to the use of Atmel
®
products. The
mixing of red LEDs with phosphor-converted LEDs may be protected by certain third-party patents, such as U.S. Patent No.
7,213,940 and related patents of Cree, Inc.
Press Contact:
Agnes Toan, PR Manager
Tel: (+1) 408-487-2963, Email: agnes.toan@atmel.com