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Texas Instruments LP5024RSMR
- Part No.:
- LP5024RSMR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
LP5024RSMR.pdf
- Description:
- IC LED DRVR LIN I2C 35MA 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,798
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Product details
Overview
LP5024RSMR from Texas Instruments is a 24-channel, 12-bit PWM RGB LED driver with constant-current sink outputs, operating from 2.7V to 5.5V VCC and supporting 1.8V/3.3V/5V logic interfaces. It delivers up to 35mA per channel at VCC ≥ 3.3V, features integrated 29kHz PWM generation per channel, and achieves ±7% device-to-device and channel-to-channel current accuracy. It is used in smart speaker indicator lighting with smooth breathing/fading effects.
For engineers reviewing the LP5024RSMR datasheet, LP5024RSMR pinout, LP5024RSMR application, or LP5024RSMR equivalent, key selection considerations include its 24-channel constant-current sink architecture, 12-bit per-channel PWM resolution, ultralow 10µA power-save mode current, I²C fast-mode (400kHz) interface, and VQFN-32 package with exposed thermal pad.
Technical Context
The LP5024RSMR integrates a 15MHz internal oscillator, on-chip LDO for VCAP regulation, and three-phase PWM phase-shifting to reduce input ripple and peak supply current. Its independent 8-bit color-mixing and 8-bit brightness-control registers per RGB LED module enable >16 million color combinations without software-level mixing.
It implements automatic power-save mode triggered after 30ms of all-LED-off state, reducing total supply current to 10µA typical. The device uses a single external IREF resistor to set global output current, with programmable max-current option (25.5mA or 35mA) and 0.25–0.4V output saturation voltage across operating conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7V to 5.5V - supports direct connection to common system rails without level shifters. |
| Max Output Current | 35mA per channel at VCC ≥ 3.3V - enables driving high-brightness RGB LEDs with minimal external components. |
| PWM Resolution & Frequency | 12-bit (9-bit + 3-bit dithering) at 29kHz - ensures flicker-free, audible-noise-free dimming for human-interface lighting. |
| Current Accuracy | ±7% device-to-device and channel-to-channel - eliminates need for per-channel calibration in mass-produced consumer devices. |
| I²C Speed | Up to 400kHz fast-mode - allows rapid LED state updates for dynamic animations with low MCU overhead. |
| Quiescent Current | 10µA typical in power-save mode - extends battery life in always-on smart home endpoints like video doorbells. |
| Package | VQFN-32 (4.0mm × 4.0mm) with exposed thermal pad - provides compact footprint and efficient thermal dissipation for dense PCB layouts. |
Pinout & Package
VQFN-32 package (4.0mm × 4.0mm) with exposed thermal pad connected to GND. Pin count: 32 terminals, including 24 dedicated current-sink outputs (OUT0–OUT23), two I²C address pins (ADDR0, ADDR1), and integrated power management signals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT0–OUT23 | Constant-current sink outputs | 24 individually controllable LED drive channels; each sinks up to 35mA; unused pins may float. |
| EN | Chip enable input | Active-high enable; drives device into 1µA shutdown mode when low; controls wake-up timing (500µs delay). |
| SCL / SDA | I²C bus interface | Supports 400kHz fast-mode; SDA is bidirectional; both tolerate 1.8V/3.3V/5V logic levels. |
| ADDR0 / ADDR1 | I²C slave address configuration | Set 2-bit hardware address; allows up to four LP5024RSMR devices on same I²C bus without software arbitration. |
| IREF | Global current reference input | Connect external resistor to set full-scale output current; determines 25.5mA or 35mA max per channel. |
| VCAP | LDO output filter node | Must connect 1µF ceramic capacitor to GND; placement critical for stable internal voltage regulation. |
| VCC / GND | Power and ground | VCC powers logic and analog blocks; exposed thermal pad is electrically GND and required for thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel 12-bit PWM + 3-phase phase-shifting | Reduces input ripple and peak current by staggering LED turn-on timing across three groups (OUT0/OUT3/…, OUT1/OUT4/…, OUT2/OUT5/…). |
| Independent color-mixing and brightness registers | Enables >16 million colors per RGB LED while maintaining linear/logarithmic dimming curves without color distortion. |
| Three programmable R/G/B banks | Allows synchronized control of multiple RGB LEDs (e.g., breathing effect across all indicators) with single register writes, cutting MCU firmware load. |
| Ultralow-power auto-save mode | Enters 10µA sleep automatically after 30ms of zero LED activity - ideal for battery-powered smart locks and smoke detectors. |
| Broadcast I²C address support | Enables simultaneous configuration of multiple LP5024RSMR devices using reserved slave address, simplifying multi-LED system initialization. |
Applications
| Smart Speaker Indicator Lighting | Video Doorbell Status Ring Light |
|---|---|
|
Use Scenario: Voice assistant status indication (e.g., listening, processing, error) using multi-color animated rings. IC Role / Device Role / Timing Role: 24-channel constant-current sink driving RGB LED ring; executes pre-programmed fade/breathe/chase sequences via I²C commands. Use Value: Eliminates MCU PWM timer resource usage and GPIO expansion; 29kHz PWM prevents audible coil whine during voice interaction. |
Use Scenario: Visual alert ring around doorbell camera lens, illuminating on motion detection or door press. IC Role / Device Role / Timing Role: Drives 12+ RGB LEDs in synchronized bank mode for uniform halo effect; responds to MCU trigger within <500µs of EN assertion. Use Value: Reduces BOM count by replacing discrete drivers and current-limiting resistors; 35mA per channel supports high-lumen LEDs under 5V rail. |
| Smart Home Appliance Control Panel | Electronic Smart Lock Keypad Illumination |
|
Use Scenario: Backlighting for touch-sensitive appliance controls (oven, washer) with ambient-aware dimming. IC Role / Device Role / Timing Role: Provides independent per-key RGB control via OUT0–OUT23; uses logarithmic brightness scaling for perceptually uniform steps. Use Value: Achieves 256-step smooth dimming without MCU interpolation; ±7% channel matching ensures consistent color across panel. |
Use Scenario: Keypad illumination that activates on proximity and pulses during authentication feedback. IC Role / Device Role / Timing Role: Powers 8–12 RGB LEDs from coin-cell or energy-harvested supply; enters 10µA power-save mode between events. Use Value: Extends battery life beyond 1 year in low-duty-cycle access applications; VCC range down to 2.7V maintains operation as battery depletes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RGB LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC59284RGER | 16-channel, 12-bit PWM, 30MHz SPI interface; no integrated phase-shifting; higher 25mA max current; requires external VREF. | Requires SPI host and additional current-setting components; lacks bank control and auto power-save modes. | Choose when SPI interface is preferred and system already uses SPI peripherals; not drop-in for I²C-based designs. |
| IS31FL3733-QFLS4-TR | 28-channel, 12-bit PWM, I²C interface; includes built-in EEPROM for pattern storage; 28mA max current; no programmable phase-shifting. | Supports standalone animation playback without MCU involvement; larger QFN-48 package; higher quiescent current (150µA). | Choose when autonomous LED patterns are needed; LP5024RSMR offers lower standby power and smaller footprint for MCU-driven systems. |
Compared with TLC59284RGER and IS31FL3733-QFLS4-TR, the LP5024RSMR uniquely balances ultra-low 10µA power-save current, compact VQFN-32 packaging, integrated 3-phase PWM shifting for clean power delivery, and simplified I²C bank control-making it optimal for cost- and space-constrained battery-powered human-interface lighting.
Availability
LP5024RSMR is available at Aetrix Electronics and suitable for smart speaker indicator lighting, video doorbell status rings, and electronic smart lock keypad illumination requiring stable component supply and long-term production continuity.
Supply support for LP5024RSMR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in precision power management and interface solutions.
The LP50xx family is designed specifically for RGB LED human-machine interface applications, emphasizing ultralow quiescent current, integrated PWM phase control, and simplified firmware integration for consumer IoT lighting systems.
FAQ
What is the maximum output current per channel for LP5024RSMR?
The LP5024RSMR supports up to 35mA per channel when VCC is ≥ 3.3V and the Max_Current_Option bit is set to 1. At full VCC range (2.7V–5.5V), the maximum is 25.5mA per channel. This is set globally via the external IREF resistor and confirmed in TI's SLVSEB8C datasheet Section 6.5.
Does LP5024RSMR support logarithmic brightness scaling?
Yes, LP5024RSMR supports both logarithmic and linear brightness scaling via the Log_Scale_EN register. Logarithmic mode is optimized for human-eye perception and avoids color distortion during dimming-critical for RGB applications where independent color-mixing and intensity registers prevent traditional gamma-curve compromises.
How many LP5024RSMR devices can be connected on a single I²C bus?
Up to four LP5024RSMR devices can share one I²C bus using the two hardware address pins (ADDR0 and ADDR1). These pins configure a 2-bit slave address, yielding four unique addresses (0x60–0x63). Broadcast addressing also allows simultaneous register writes to all devices on the bus.
What is the PWM frequency and resolution of LP5024RSMR?
LP5024RSMR provides a fixed 29kHz PWM switching frequency per channel-above the 20kHz human hearing threshold-to eliminate audible noise. Its effective resolution is 12 bits, achieved through 9-bit native PWM plus 3-bit digital dithering (enabled by default in the PWM_Dithering_EN register).
What package type and thermal characteristics does LP5024RSMR use?
LP5024RSMR uses a 32-pin VQFN package (4.0mm × 4.0mm) with an exposed thermal pad connected to GND. Its junction-to-ambient thermal resistance (RθJA) is 36.4°C/W, and junction-to-board (RθJB) is 15.9°C/W-enabling reliable operation up to 85°C ambient without forced airflow in typical consumer enclosures.
LP5024RSMR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- No
- Number of Outputs:
- 24
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 0V ~ 5.5V
- Current - Output / Channel:
- 35mA
- Frequency:
- 15MHz
- Dimming:
- I2C
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VQFN (4x4)
LP5024RSMR FAQ
1.How can I place an order for LP5024RSMR through Aetrix?
Please submit a Request for Quotation (RFQ) for LP5024RSMR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LP5024RSMR reliable?
The price and inventory of LP5024RSMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP5024RSMR is usually 5 days.
3.What payment methods are accepted for LP5024RSMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP5024RSMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP5024RSMR?
LP5024RSMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP5024RSMR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LP5024RSMR?
For technical support, including LP5024RSMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP5024RSMR requirements.
6.How does Aetrix verify that LP5024RSMR is sourced from the original manufacturer or authorized distributors?
All LP5024RSMR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LP5024RSMR meets industry standards.
7.What is the process for return or replacement of LP5024RSMR?
All LP5024RSMR units undergo pre-shipment inspection (PSI). If there is an issue with LP5024RSMR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LP5024RSMR part is unused and in its original packaging.
Return procedure for LP5024RSMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP5024RSMR Tags
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