GUI for evaluation module (EVM)
Data sheet
LP5018
- Operating voltage range:
- VCC range: 2.7V to 5.5V
- EN, SDA, and SCL pins compatible with 1.8V, 3.3V, and 5V power rails
- Output maximum voltage: 6V
- 24 constant-current sinks with high precision
- 25.5mA maximum per channel with VCC in full range
- 35mA maximum per channel when VCC ≥ 3.3V
- Device-to-device error: ±7%; channel-to-channel error: ±7%
- Ultralow quiescent current:
- Shutdown mode: 1µA (maximum) with EN low
- Power saving mode: 10µA (typical) with EN high and all LEDs off for > 30ms
- Integrated 12-bit, 29kHz PWM generator for each channel:
- Independent color-mixing register per channel
- Independent brightness-control register per RGB LED module
- Optional logarithmic- or linear-scale brightness control
- Integrated 3-phase PWM-shifting scheme
- 3 programmable banks (R, G, B) for easy software control of each color
- 2 external hardware address pins allow connecting up to 4 devices
- Broadcast slave address allows configuring multiple devices simultaneously
- Auto-increment allows writing or reading consecutive registers within one transmission
- Up to 400kHz fast-mode I2C speed
In smart homes and other applications that use human-machine-interaction, high-performance RGB LED drivers are required. LED animation effects such as flashing, breathing, and chasing greatly improve user experience, and minimal system noise is essential.
The LP50xx device is an 18- or 24-channel constant current sink LED driver. The LP50xx device includes integrated color mixing and brightness control, and pre-configuration simplifies the software coding process. Integrated 12-bit, 29kHz PWM generators for each channel enable smooth, vivid color for LEDs, and eliminate audible noise.
The LP50xx device controls each LED output with a 12-bit PWM resolution at 29kHz switching frequency, which helps achieve a smooth dimming effect and eliminates audible noise. The independent color mixing and intensity control registers make the software coding straightforward. When targeting a fade-in, fade-out type breathing effect, the global R, G, B bank control reduces the microcontroller loading significantly. The LP50xx device also implements a PWM phase-shifting function to help reduce the input power budget when LEDs turn on simultaneously.
The LP50xx device implements an automatic power-saving mode to achieve ultralow quiescent current. When channels are all off for 30ms, the device total power consumption is down to 10µA, which makes the LP50xx device a potential choice for battery-powered end equipment.
Technical documentation
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View all 8 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LP50xx 18-, 24-Channel, 12-Bit, PWM Ultralow-Quiescent-Current, I2 C RGB LED Drivers datasheet (Rev. C) | PDF | HTML | 08 Jul 2024 |
| White paper | Common LED Functions and LED Driver Design Considerations | 21 Sep 2020 | ||
| Application note | System Design Guidelines for Full-Color RGB LED Matrix Based on LP50xx Device | 08 Apr 2020 | ||
| Application note | How to Select a RGB LED Driver | 08 Aug 2019 | ||
| White paper | Smart speaker fundamentals: Weighing the many design trade-offs | 25 Feb 2019 | ||
| White paper | 智慧型喇叭基本說明： 衡量各種設計優缺點 | 08 Feb 2019 | ||
| White paper | 스마트 스피커 기본 사항: 설계 장단점 따져 보기 | 08 Feb 2019 | ||
| Technical article | Using an RGBW LED driver to elevate LED human-machine interface designs | PDF | HTML | 27 Nov 2018 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
LP5024EVM — LP5024 12-bit PWM ultralow quiescent current I2C RGB LED driver evaluation module
This board evaluates the LP5024 I2C bus-controlled, 24-channel, constant-current LED driver. The user's guide includes set-up instructions, a schematic diagram, a bill of materials, printed-circuit board layout drawings, and software instructions.
User guide: PDF
Simulation model
LP5024 & LP5018 Unencrypted PSpice Transient Model
SLVMCI3.ZIP (10 KB) - PSpice Model
Simulation tool
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VQFN (RSM) | 32 | Ultra Librarian |
| VSSOP (DGS) | 28 | Ultra Librarian |
Ordering & quality
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