LP5024RSMR - 24-Channel I2C RGB LED Driver | Texas Instruments
N.º de pieza: LP5024RSMR ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $3.85 | $3,85 |
| 10 | $3.52 | $35,20 |
| 100 | $2.95 | $295,00 |
| 500 | $2.42 | $1.210,00 |
| 1.000 | $1.99 | $1.990,00 |
| 3.000 | $1.62 | $4.860,00 |
LP5024RSMR Descripción general
An RGB LED driver is a specialized constant-current sink IC designed to individually control the brightness and color of multiple LEDs or RGB LED groups. RGB LED drivers sit within the broader hierarchy of LED Drivers -> Power Management ICs -> Semiconductors, and they share lineage with general-purpose linear LED drivers and matrix display drivers. By integrating current sinks, PWM generators, and an I2C/SPI control interface into a single device, RGB LED drivers eliminate the need for external MOSFETs, microcontrollers with PWM peripherals, and discrete current-limiting resistors, dramatically simplifying multichannel lighting designs.
Key differentiating specifications include 16-bit color mixing per channel (65,536 color steps when combining R/G/B), programmable PWM frequency up to 1.6 kHz for power/EMI tuning, an integrated global R/G/B bank control register that enables fade-in/fade-out breathing effects across all LEDs without per-channel updates, and ultra-low quiescent current during shutdown to preserve battery life in portable applications. The device also includes open-drain outputs capable of 35 mA peak transient and supports independent color mixing and brightness registers per channel.
Architecturally, the LP5024RSMR uses a bandgap-referenced current mirror per channel with 8-bit dot-correction and 12-bit grayscale PWM, accessed via a standard I2C interface. This dual-modulation approach enables both fine-grained brightness control and per-LED brightness calibration to compensate for LED-to-LED luminosity variation, achieving visually uniform light output across arrays.
Typical applications include smart speaker RGB lighting rings, IoT indicator panels, wearable device status LEDs, automotive interior ambient lighting strips, and human-machine interface (HMI) backlights. The independent channel control also suits gaming peripherals and AR/VR device indicator arrays where synchronized multicolor effects are required.
When designing with this device, engineers should evaluate total LED forward voltage versus VCC headroom and place decoupling capacitors close to VCC and VLED pins. The 32-VQFN package has a small thermal pad that requires a minimum copper pour for heat dissipation when driving many channels at full current simultaneously.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design considerations that go beyond the manufacturer datasheet summary, providing engineering context for selection, layout, and sourcing decisions.
Alternativas directas para LP5024RSMR — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
LP5018RSMR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LP5030RSMR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LP5009RSMR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LP5024RSMT
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LP5024RSMRG4
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LP5024RSMR Valores máximos y características eléctricas
| Product Type | RGB LED Driver |
| Number of Channels | 24 |
| Topología | Linear constant-current sink |
| VCC Supply Range | 2.7 V to 5.5 V |
| Maximum Output Voltage | 6 V |
| Maximum Current per Channel | 25.5 mA (DC), 35 mA peak |
| PWM Resolution | 12-bit (4096 levels) |
| PWM Frequency | 29 kHz (typical), programmable up to 1.6 kHz dimming cycle |
| Color Mixing Resolution | 16-bit per channel (65,536 color steps) |
| Logic Level Compatibility | 1.8 V, 3.3 V, 5 V (EN/SDA/SCL) |
| Interfaz | I2C (Fast/Standard mode) |
| Dot Correction | 8-bit per channel |
| Global Bank Control | Yes (R/G/B independent) |
| Encapsulado | VQFN-32 (RSM) 4x4 mm |
| Tipo de montaje | Surface Mount |
| Temperatura de funcionamiento | -40 C to +85 C |
| Estado RoHS | Compliant |
Configuración de pines de LP5024RSMR
| Pin 1 | OUT0 — LED current sink output 0 |
| Pin 2 | OUT1 — LED current sink output 1 |
| Pin 3 | OUT2 — LED current sink output 2 |
| Pin 4 | OUT3 — LED current sink output 3 |
| Pin 5 | OUT4 — LED current sink output 4 |
| Pin 6 | OUT5 — LED current sink output 5 |
| Pin 7 | OUT6 — LED current sink output 6 |
| Pin 8 | OUT7 — LED current sink output 7 |
| Pin 9 | GND — Ground reference |
| Pin 10 | OUT8 — LED current sink output 8 |
| Pin 11 | OUT9 — LED current sink output 9 |
| Pin 12 | OUT10 — LED current sink output 10 |
| Pin 13 | OUT11 — LED current sink output 11 |
| Pin 14 | OUT12 — LED current sink output 12 |
| Pin 15 | OUT13 — LED current sink output 13 |
| Pin 16 | OUT14 — LED current sink output 14 |
| Pin 17 | OUT15 — LED current sink output 15 |
| Pin 18 | VCC — Supply voltage (2.7V to 5.5V) |
| Pin 19 | ADDR — I2C slave address select |
| Pin 20 | SDA — I2C data |
| Pin 21 | SCL — I2C clock |
| Pin 22 | EN — Active-high enable |
| Pin 23 | IREF — Current reference resistor |
| Pin 24 | OUT16 — LED current sink output 16 |
| Pin 25 | OUT17 — LED current sink output 17 |
| Pin 26 | OUT18 — LED current sink output 18 |
| Pin 27 | OUT19 — LED current sink output 19 |
| Pin 28 | OUT20 — LED current sink output 20 |
| Pin 29 | OUT21 — LED current sink output 21 |
| Pin 30 | OUT22 — LED current sink output 22 |
| Pin 31 | OUT23 — LED current sink output 23 |
| Pin 32 | GND — Ground reference (thermal pad) |
Aplicaciones típicas
LP5024RSMR es adecuado para 6 aplicacións: Smart Speaker RGB Indicator Ring, Wearable Device Status LED Array, IoT Smart-Home Status Panel, Gaming Peripheral RGB Lighting, Automotive Interior Ambient Lighting, Industrial HMI Status Indicators.
Smart Speaker RGB Indicator Ring
The LP5024RSMR is ideal for voice-assistant RGB indicator rings because it delivers 24 constant-current sinks with 12-bit PWM at 29 kHz, eliminating audible noise during dimming transitions. Its I2C interface connects directly to 1.8 V, 3.3 V, or 5 V host MCUs without level shifters, reducing BOM cost. The integrated global R/G/B bank control enables synchronized fade-in/fade-out breathing effects across all LEDs with a single register write, offloading the host MCU. With 25.5 mA per channel and 6 V output rating, it can drive common 20 mA RGB LEDs with appropriate IREF resistor setting, and the 4x4 mm VQFN package fits beneath the speaker base.
Recomendado
Wearable Device Status LED Array
The LP5024RSMR suits wearable status LED arrays where multiple RGB indicators must operate independently from a small footprint. Its 32-VQFN 4x4 mm package leaves substantial board area for sensors and battery, while the 2.7-5.5 V VCC range accepts direct Li-Ion battery input. Each channel supports 12-bit grayscale and 8-bit dot correction, allowing per-LED luminosity calibration to compensate for LED binning variation. The shutdown quiescent current is in the microamp range, preserving battery life when indicators are off, and the 29 kHz PWM frequency avoids audible whine from nearby piezo speakers.
Recomendado
IoT Smart-Home Status Panel
The LP5024RSMR drives IoT status panels that combine multiple RGB indicators for Wi-Fi, Zigbee, cloud, alarm, and power states. With 24 channels, a single LP5024RSMR can replace several discrete LED driver transistors, simplifying the schematic and reducing PCB area. Its I2C address-select pin permits up to two LP5024RSMR devices on the same bus for 48-channel systems. Fast-mode I2C at 400 kHz supports smooth live updates without bus latency. The 8-bit dot correction per channel ensures consistent luminosity across LEDs of different production batches, important for the uniform appearance demanded in premium smart-home hubs.
Recomendado
Gaming Peripheral RGB Lighting
The LP5024RSMR is well matched to gaming keyboards, mice, and headsets that demand per-key or per-zone RGB lighting with millions of color steps. Each channel combines 12-bit PWM with 8-bit dot correction and 16-bit color mixing, enabling 65,536 colors per channel and visually smooth fades. The integrated current sinks remove the need for external MOSFETs, saving board area inside compact mouse and keyboard PCBs. Programmable PWM frequency lets designers tune the dimming cycle to match specific LED rise/fall times, eliminating ghosting or color shift during rapid color transitions.
Recomendado
Automotive Interior Ambient Lighting
The LP5024RSMR supports automotive interior ambient lighting strips that span door panels, dashboards, and footwells. Its -40 C to +85 C operating range covers the AEC-Q100 temperature window typical for non-safety automotive electronics. The 24 channels drive multiple LED zones from a single IC, reducing wiring harness complexity. The I2C interface accepts commands from the body control module, allowing dynamic color scenes for drive modes and welcome/farewell animations. Place a small ferrite bead on VCC and adequate copper pour under the thermal pad for load-dump transient robustness in 12 V automotive systems.
Recomendado
Industrial HMI Status Indicators
The LP5024RSMR suits industrial HMI panels where multiple RGB LEDs indicate machine state, fault codes, and operator prompts. Its I2C bus allows simple daisy-chained addressing, and the 5 V logic tolerance connects directly to industrial PLC digital outputs. The 12-bit PWM resolution supports precise color-graded alarms (green-amber-red transitions) for at-a-glance status reading. Wide operating temperature and robust constant-current regulation ensure stable brightness across temperature swings in factory environments, while the small VQFN-32 footprint fits tightly behind indicator windows on the HMI bezel.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LP5024RSMR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LP5018RSMR | LP5030RSMR | LP5009RSMR |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | VQFN-32 (RSM) 4x4 mm | VQFN-32 (RSM) - same | VQFN-32 (RSM) - same | VQFN-32 (RSM) - same |
| Number of Channels | 24 | 18 | 30 | 9 |
| Maximum Current per Channel | 25.5 mA | 25.5 mA | 25.5 mA | 25.5 mA |
| VCC Supply Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Maximum Output Voltage | 6 V | 6 V | 6 V | 6 V |
| PWM Resolution | 12-bit | 12-bit | 12-bit | 12-bit |
| Interface | I2C | I2C | I2C | I2C |
| Global R/G/B Bank Control | Yes | Yes | Yes | Yes |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Diferenciadores clave
- Highest channel count in VQFN-32 (RSM) family (frente a LP5018RSMR)
- Mid-tier channel count optimized for moderate-density designs (frente a LP5030RSMR)
- Drop-in compatibility with LP5009RSMR for wearable migration paths (frente a LP5009RSMR)
- Higher channel count than typical competitors in same footprint (frente a TLC59401 (SSOP-28))
Notas de diseño
Estimated: When all 24 outputs sink 25.5 mA at full VCC=5.5 V with output voltage near 1 V, the LP5024RSMR dissipates roughly (5.5 V - 1 V) * 25.5 mA * 24 = 2.75 W internally. The VQFN-32 RSM thermal pad must be soldered to a copper pour of at least 25 mm^2 on the top and bottom PCB layers with thermal vias, otherwise junction temperature can exceed 125 C in enclosed wearable enclosures. For multi-channel full-load operation, derate IREF to limit per-channel current to 15-18 mA.
Place the IREF resistor within 5 mm of pin 23 with a star-ground return to the LP5024RSMR GND pin to avoid current-reference drift. Decouple VCC with a 1 uF X7R ceramic capacitor close to pin 18 plus a 0.1 uF X7R high-frequency bypass. Add a 10 uF bulk capacitor on VLED (the LED anode rail) if multiple channels switch simultaneously. Keep digital SDA/SCL traces away from OUT traces to avoid coupling PWM noise into the bus.
Do not exceed the 6 V maximum output rating on OUT pins - use an external TVS or zener if the LED anode rail can transient above 6 V during hot-plug events. Ensure each OUT pin never sources current; the LP5024RSMR only sinks. Do not leave IREF floating or the current source defaults to maximum; tie IREF through a 14.7 kohm resistor to GND for the datasheet-recommended 25.5 mA full-scale. Pull EN low during VCC ramp-up to prevent undefined register states.
Use 4.7 kohm pull-up resistors on SDA and SCL for Standard-mode I2C (100 kHz) or 2.2 kohm for Fast-mode (400 kHz) with bus capacitance under 200 pF. For longer bus traces, add a 100 ohm series resistor at the MCU end to damp reflections. Verify address conflict by setting ADDR to GND or VCC to select between two valid I2C slave addresses for stacking two LP5024RSMR devices on the same bus for 48-channel systems.
Información de cumplimiento
RoHS and REACH compliant per TI product page. Not AEC-Q100 qualified - for automotive designs requiring full AEC-Q100 certification, evaluate TI's LP50xx-Q1 variants separately. Halogen-free status not specified in retrieved datasheet excerpt.
