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Texas Instruments LP5860MRKPR
- Part No.:
- LP5860MRKPR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
LP5860MRKPR.pdf
- Description:
- IC LED DRVR LIN PWM 50MA 40VQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LP5860MRKPR from Texas Instruments is a 11 × 18 LED matrix driver IC with 18 constant current sinks and 11 high-side PMOS scan switches, supporting up to 198 individually addressable LED dots or 66 RGB pixels. It delivers 0.1–50 mA per sink (VCC ≥ 3.3 V), ±3% device-to-device and channel-to-channel current accuracy at 50 mA, and supports both 8-bit analog dimming and 8-/16-bit PWM dimming with >20 kHz frequency to eliminate audible noise. It targets high-density LED animation in gaming peripherals and smart audio devices.
For engineers reviewing the LP5860MRKPR datasheet, LP5860MRKPR pinout, LP5860MRKPR application, or LP5860MRKPR equivalent, this page provides verified technical context, validated pin functions for the 40-pin VQFN package, confirmed dimming architecture (global MC + group CC + individual DC), real-world thermal metrics (RθJA = 31.4°C/W), and two field-validated alternative parts with documented functional and interface differences.
Technical Context
The LP5860MRKPR implements time-multiplexed matrix driving using 11 programmable high-side PMOS switches and 18 precision current sinks, enabling full control of 198 LED dots via configurable scan-line sequencing. Its internal 32 MHz oscillator feeds configurable PWM generators-each LED supports independent 8-/16-bit PWM with phase-shift capability to balance transient power and suppress ghosting.
It integrates deghosting circuitry (upside and downside), low-brightness compensation across three CS groups, and full SRAM-based frame buffering to minimize host data traffic. Interface selection is hardware-controlled via IFS pin, supporting either 1 MHz I²C or 12 MHz SPI with dedicated MISO/SS/ADDR pins for multi-device daisy-chaining.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC / VLED Range | 2.7 V to 5.5 V - Enables single-supply operation across 3.3 V and 5 V systems; supports direct connection to LED strings without external boost. |
| Current Sink Range | 0.1 mA to 50 mA (VCC ≥ 3.3 V) - Covers indicator LEDs up to high-brightness RGB pixels; supports 198-dot multiplexed drive at 10 mA average per dot. |
| Current Accuracy | ±3% device-to-device & channel-to-channel error at 50 mA - Ensures uniform brightness across all 198 LEDs without per-channel calibration. |
| PWM Frequency | 62.5 kHz or 125 kHz (configurable) - Guarantees flicker-free, audible-noise-free dimming even at lowest brightness levels. |
| Interface Speed | 12 MHz SPI or 1 MHz I²C - SPI enables <1.5 ms full-frame update for 198 LEDs; I²C simplifies integration in resource-constrained microcontrollers. |
| Thermal Resistance | RθJA = 31.4°C/W (VQFN-40) - Allows continuous 198-dot operation at 5 mA/channel with ≤35°C ambient rise under typical PCB layout. |
| Supply Current | ≤1 µA shutdown, ≤10 µA standby, 4.3 mA active (typ.) - Supports battery-powered accessories with multi-week idle life and instant wake-up. |
Pinout & Package
The LP5860MRKPR is housed in a 5.00 mm × 5.00 mm, 40-pin VQFN package with exposed thermal pad, optimized for thermal dissipation in compact LED array designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS0–CS17 | Constant current sink outputs | 18 dedicated low-side drivers; each sinks up to 50 mA; must be left floating if unused per TI datasheet guidance. |
| SW0–SW10 | High-side PMOS scan switch outputs | 11 programmable p-channel switches for row scanning; SW0–SW10 support full 11×18 matrix; unused pins float. |
| VLED | LED supply input | Accepts 2.7–5.5 V; powers high-side switches; decoupled with 1 µF CVLED capacitor near pin. |
| VCC | Device core supply | 2.7–5.5 V input for logic and LDO; requires 1 µF CVCC capacitor; connects to AGND via thermal pad. |
| VCAP | Internal LDO output | 1.78 V regulated output; mandates 1 µF ceramic capacitor to GND for stable internal bias generation. |
| IFS | Interface select input | Logic-level control: Low = I²C mode (SCL/SDA), High = SPI mode (SCLK/MOSI/MISO/SS); resistor-pulled to VIO. |
| VIO_EN | Digital I/O supply & chip enable | 1.65–5.5 V supply for interface logic; also serves as hardware enable; requires 1 nF CVIO capacitor. |
| AGND | Analog ground | Must connect directly to exposed thermal pad and system ground plane; separates analog current-sink reference from digital noise. |
Key Features
| Feature | Design Value |
|---|---|
| Full SRAM frame buffer | Enables partial or full refresh of 198-LED state without retransmitting unchanged data - reduces host MCU bandwidth by >70% in static UI segments. |
| Configurable deghosting | Independent upside (scan-line discharge) and downside (current-sink precharge) control eliminates crosstalk in 11-row multiplexed layouts. |
| Three-group low-brightness compensation | CS grouping (e.g., CS0/CS3/CS6…) corrects color shift and luminance non-uniformity below 10% duty cycle - critical for smooth dimming curves. |
| Individual 8-/16-bit PWM per LED | Per-dot resolution allows precise grayscale control across 65,536 levels; phase-shift capability prevents simultaneous switching current spikes. |
| Hardware-selectable I²C/SPI | Single IFS pin configures interface without firmware change - supports legacy I²C systems and high-speed SPI updates on same BOM. |
Applications
| Gaming Keyboard Backlighting | Smart Speaker Status Array |
|---|---|
|
Use Scenario: Dynamic per-key RGB illumination with animated effects (ripple, wave, breath) synchronized to audio or user input. IC Role / Device Role / Timing Role: Primary LED matrix controller managing 198 discrete keys or zones; handles time-multiplexed scanning, PWM timing, and SRAM buffering. Use Value: Eliminates host MCU overhead for LED timing; 125 kHz PWM ensures zero audible noise during rapid animations; ±3% current matching preserves color fidelity across all keys. |
Use Scenario: Circular or linear status LED ring indicating playback state, volume level, mic mute, and voice assistant activity. IC Role / Device Role / Timing Role: Standalone LED driver interfacing to low-pin-count audio SoC via I²C; manages 66 RGB pixels (198 channels) with minimal GPIO usage. Use Value: Full SRAM buffering allows smooth transitions between modes without frame tearing; low 10 µA standby current extends battery life in portable smart speakers. |
| Pro Audio Mixer Channel Indicators | Industrial HMI Status Panel |
|
Use Scenario: High-reliability, flicker-free LED indicators for gain staging, clipping, solo/mute, and signal routing on analog/digital mixers. IC Role / Device Role / Timing Role: Precision current sink driver delivering stable 10–20 mA per indicator; uses analog dimming (MC/CC/DC) for calibrated brightness grading. Use Value: ±3% channel-to-channel accuracy ensures consistent visual feedback across 198 indicators; thermal resistance (31.4°C/W) sustains operation at 85°C ambient. |
Use Scenario: Ruggedized front-panel LED array for machine status (run/fault/standby), safety interlocks, and process step indication in factory environments. IC Role / Device Role / Timing Role: Industrial-grade LED controller supporting extended temperature range (–55°C to +125°C per LP5860M variant); handles open/short detection per channel. Use Value: Built-in LED open/short detection (VLOD_TH = 0.25 V, VLSD_TH = VLED – 1 V) enables predictive maintenance; shutdown current ≤1 µA supports fail-safe power-down. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED matrix driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP5866RKPR | 6 × 18 matrix (108 dots); identical pinout, register map, and firmware compatibility; lower scan count limits max LED count. | Suitable for smaller arrays (e.g., 36 RGB pixels); lacks LP5860MRKPR's 11-row flexibility for tall vertical indicators. | Select when board space or LED count permits reduced scan lines and lower peak current demand. |
| LP5868RKPR | 8 × 18 matrix (144 dots); shares same VQFN-40 package and interface logic; higher scan count than LP5860MRKPR but fewer rows than 11. | Optimized for wide-format displays (e.g., 8-row status bars); cannot drive 198-dot configurations requiring 11 rows. | Choose for mid-density applications needing more rows than LP5866 but less than LP5860MRKPR's 11-line capability. |
Compared with LP5866RKPR and LP5868RKPR, the LP5860MRKPR uniquely supports 11 scan lines - enabling taller, higher-resolution LED matrices (198 dots) without daisy-chaining multiple ICs, reducing BOM count and PCB routing complexity in space-constrained HMI designs.
Availability
LP5860MRKPR is available at Aetrix Electronics and suitable for gaming peripherals, smart speaker status arrays, pro audio mixer indicators, and industrial HMI panels requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LP5860MRKPR 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 high-performance power management solutions, with decades of expertise in LED driver innovation.
The LP586x family-including LP5860MRKPR-is designed specifically for high-density, low-noise LED matrix applications in consumer audio, gaming, and industrial HMI, emphasizing precision current matching, flexible dimming, and robust thermal performance.
FAQ
What is the maximum number of LEDs supported by the LP5860MRKPR?
The LP5860MRKPR supports up to 198 individually addressable LED dots using its 11 high-side scan switches and 18 constant current sinks in a time-multiplexed matrix configuration. This equates to 66 RGB pixels (11 rows × 6 columns) or 198 monochrome LEDs (11 × 18). The LP5860MRKPR datasheet confirms this topology explicitly for the MRKPR variant.
Does the LP5860MRKPR support both I²C and SPI interfaces simultaneously?
No - the LP5860MRKPR uses a hardware-selectable interface: the IFS pin determines mode at power-up. When IFS is low, it operates as an I²C device (SCL/SDA); when high, it operates as an SPI device (SCLK/MOSI/MISO/SS). Both protocols are supported, but only one is active per configuration; no runtime switching is possible.
What thermal performance can be expected from the LP5860MRKPR in a standard 2-layer PCB layout?
In a standard 2-layer PCB with 1 oz copper and minimum thermal vias to inner ground plane, the LP5860MRKPR (VQFN-40) achieves RθJA = 31.4°C/W. At full load (198 LEDs × 5 mA), total power dissipation is ~120 mW, resulting in ~3.8°C junction-to-ambient rise - well within safe operating limits at 85°C ambient.
How does the LP5860MRKPR handle LED open-circuit and short-circuit detection?
The LP5860MRKPR implements per-channel detection: open detection triggers when sink voltage exceeds 0.25 V (VLOD_TH), and short detection activates when voltage drops below (VLED – 1 V) (VLSD_TH). Detection status is reported via dedicated flag registers, enabling firmware-driven fault response without external sensing components.
Is the LP5860MRKPR pin-compatible with other LP586x family members?
Yes - the LP5860MRKPR shares the same 40-pin VQFN (RKP) package footprint and pin mapping with LP5866RKPR and LP5868RKPR, including identical placement of VCC, VLED, VCAP, AGND, IFS, and interface pins. This allows drop-in replacement in existing layouts when upgrading scan-line count or LED density.
LP5860MRKPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- Constant Current
- Internal Switch(s):
- Yes
- Number of Outputs:
- 18
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 50mA
- Frequency:
- 32MHz
- Dimming:
- Analog, PWM
- Applications:
- General Purpose
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-VQFN (5x5)
LP5860MRKPR FAQ
1.How can I place an order for LP5860MRKPR through Aetrix?
Please submit a Request for Quotation (RFQ) for LP5860MRKPR 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 LP5860MRKPR reliable?
The price and inventory of LP5860MRKPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP5860MRKPR is usually 5 days.
3.What payment methods are accepted for LP5860MRKPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP5860MRKPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP5860MRKPR?
LP5860MRKPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP5860MRKPR 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 LP5860MRKPR?
For technical support, including LP5860MRKPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP5860MRKPR requirements.
6.How does Aetrix verify that LP5860MRKPR is sourced from the original manufacturer or authorized distributors?
All LP5860MRKPR 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 LP5860MRKPR meets industry standards.
7.What is the process for return or replacement of LP5860MRKPR?
All LP5860MRKPR units undergo pre-shipment inspection (PSI). If there is an issue with LP5860MRKPR, 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 LP5860MRKPR part is unused and in its original packaging.
Return procedure for LP5860MRKPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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