TI’s new LED drivers with integrated PWM can help electronics designers add innovative lighting features to their systems
Devices such as speakers, TVs, refrigerators, set-top boxes and smoke detectors have become intelligent and connected with each other. They can now be controlled by users remotely or through voice wakeup. This means they will also require an improved human-machine interface. A light-emitting diode (LED) indicator like an LED ring, LED matrix or red-green-blue (RGB) LED lighting interacts with users by changing patterns, such as chasing or blinking.
TI’s LP50xx multichannel, RGB LED drivers, are a good fit for such applications. These LED drivers come with integrated, independent color mixing, brightness control and a power-saving mode. The LP5018, LP5024, LP5030 and LP5036 enable smooth, vivid color and reduce system power consumption.
LED drivers achieve optimal color and brightness with zero audible noise
TI claims that these devices are the industry’s first to offer a 29-kHz dimming frequency, above human-audible range, which helps to eliminate the noise typically heard when dimming lights. This will help designers of applications that use a human-machine interface, such as portable electronics, building automation and appliances, eliminate the noise typically heard when dimming lights.
Additionally, designers can achieve smoother color and brightness-level adjustments compared to standard pulse-width modulation (PWM) solutions, by taking advantage of the devices’ integrated 12-bit PWM generator.
Key features and benefits of the new LED drivers:
- High-resolution PWM dimming: The devices in TI’s LP50xx family integrate a 12-bit PWM generator that operates above a human-audible frequency, at 29 kHz per channel, enabling smooth, vivid color with zero audible noise.
- Ultra-low quiescent current: An integrated power-saving mode dramatically reduces power consumption to as low as 0.01 mA from the typical 9 mA offered in existing devices, improving total system efficiency in standby mode.
- Multichannel options: 18-, 24-, 30- and 36-channel options provide independent color mixing and brightness control, while three integrated, programmable banks enable simplified software coding and ease of design.
Tools and support to speed design
Designers can download LP50xx graphical user interface software to easily configure the LP5018, LP5024, LP5030 and LP5036 LED drivers. Engineers can jump-start their designs with the LP5024EVM and LP5036EVM evaluation modules.
TI also offers the “Various LED Ring Lighting Patterns” reference design to help designers implement sophisticated lighting patterns for end equipment with a constant voltage supply.
Package, availability and pricing
The LP5018 and LP5024 LED drivers are available now in the TI store. Additionally, pre-production samples of the LP5030 and LP5036 are available now in the TI store. The table below lists pricing and package type.
More information on ti.com blog.
For product information, see www.ti.com/lp5018-pr, www.ti.com/lp5024-pr, www.ti.com/lp5030-pr.