GUI für Evaluierungsmodul (EVM)
LP5024
24-kanaliger I2C-Treiber für RGB-LEDs mit Konstantstrom
Datenblatt
LP5024
- 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.
Technische Dokumentation
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Alle anzeigen 7 | Typ | Titel | Datum | ||
|---|---|---|---|---|
| * | 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 | ||
| Technical article | Using an RGBW LED driver to elevate LED human-machine interface designs | PDF | HTML | 27 Nov 2018 | |
| EVM User's guide | LP5024EVM User's Guide | 14 Mär 2018 |
Design und Entwicklung
Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.
Evaluierungsplatine
LP5024EVM — LP5024 – RGB-LED-Treiber mit I2C-Schnittstelle, 12-Bit-PWM und extrem niedrigem Ruhestrom – Evaluier
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.
Benutzerhandbuch: PDF
Simulationsmodell
LP5024 & LP5018 Unencrypted PSpice Transient Model
SLVMCI3.ZIP (10 KB) - PSpice Model
Simulationstool
PSPICE-FOR-TI — PSpice® für TI Design-und Simulationstool
PSpice® für TI ist eine Design- und Simulationsumgebung, welche Sie dabei unterstützt, die Funktionalität analoger Schaltungen zu evaluieren. Diese voll ausgestattete Design- und Simulationssuite verwendet eine analoge Analyse-Engine von Cadence®. PSpice für TI ist kostenlos erhältlich und (...)
Referenzdesigns
TIDA-050011 — Referenzdesign für verschiedene LED-Ringlichtmuster
This reference design enables human-machine interface scenarios with an LED ring that utilizes two LP5024 LED drivers to create vivid lighting patterns. Design helps to resolve common challenges for end equipment with complicated lighting patterns and constant voltage supply. This design can also (...)
| Gehäuse | Pins | CAD-Symbole, Footprints und 3D-Modelle |
|---|---|---|
| VQFN (RSM) | 32 | Ultra Librarian |
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