First to offer 29-kHz dimming frequency to reduce noise associated with dimming lights in HMI applications

By Alex Pluemer, contributing writer

Texas
Instruments Inc.
recently launched a new family of LED drivers that are the first in
the industry to offer a 29-kHz dimming frequency — a frequency above the range
of what can be detected by the human ear — to help developers reduce the noise
associated with the dimming lights in human-machine-interface applications like
appliances, building automation, and portable electronics.

The LP5018, LP5024, LP5030,
and LP5036
drivers all integrate independent color mixing, brightness control, and a
power-saving mode to deliver vivid color and reduce system power consumption. An
integrated 12-bit pulse-width modulation (PWM) generator delivers smoother
color and brightness-level adjustments than standard PWM solutions, said TI, and
an integrated power-saving mode lowers power consumption to as little as 0.01 mA
(existing solutions typically consume approximately 9 mA in standby modes),
which helps improve total system efficiency in standby mode.

Three integrated,
programmable banks simplify software coding and the overall design process, and
18-, 24-, 30-, and 36-channel options are available to provide independent
color mixing and brightness control.

TI offers a
variety of support tools to help developers incorporate the LP50xx family into
their designs. Designers can download
the LP50xx graphical user interface software
to configure the LED drivers, while the LP5024EVM and LP5036EVM evaluation
modules help jumpstart their designs.

The LP5018 and
LP5024 LED drivers are available now, and pre-production samples of the LP5030
and LP5036 are available now in the TI store.

Each of the
devices’ specifications and pricing options are as follows:

Driver Channels Package Price Per 1,000 Units
LP5018 18 4 × 4 mm QFN $0.73
LP5024 24 4 × 4 mm QFN $0.82
LP5030 30 5 × 6 mm QFN $0.97
LP5036 36 5 × 6 mm QFN $1.08