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Texas Instruments LP5812ADSDR
- Part No.:
- LP5812ADSDR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
LP5812ADSDR.pdf
- Description:
- 4 X 3 MATRIX RGB LED DRIVER WITH
- Quantity:
- Payment:
- Shipping:
Inventory:1,694
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Product details
Overview
LP5812ADSDR from Texas Instruments is a 4 × 3 matrix RGB LED driver IC with autonomous animation engine, time-cross-multiplexing (TCM) topology, and integrated 4-channel constant current sinks (0.1–51 mA per channel). It operates from 2.7 V to 5.5 V, supports I²C up to 1 MHz, and delivers ultra-low active current (0.4 mA typical at 25.5 mA LED load), enabling compact RGB indication in space-constrained portable electronics.
For engineers reviewing the LP5812ADSDR datasheet, LP5812ADSDR pinout, LP5812ADSDR application, or LP5812ADSDR equivalent, this page provides verified technical context, validated pin functions for WSON-8 package, confirmed TCM drive modes (¼–1× multiplexing), autonomous animation register mapping, and real-world substitution guidance - all grounded in TI's SNVSCC9C production datasheet (Feb 2025 revision).
Technical Context
The LP5812ADSDR implements a time-cross-multiplexing (TCM) architecture using four bidirectional output pins (OUT0–OUT3), each integrating a high-side PMOS scan switch and low-side constant current sink. This enables flexible drive configurations: direct mode (4 LEDs), TCM mode (up to 12 LEDs / 4 RGB), or mix mode - all programmable via Dev_Config_1 register bits (led_mode = 0h–7h).
It features autonomous animation control with per-LED 8-bit dot current (DC) and 8-bit PWM dimming (24 kHz max), linear/exponential curve selection, and synchronized multi-device operation via 6 MHz internal oscillator and SYNC pin. Integrated de-ghosting uses configurable Vmid clamping (Dev_Config12) to eliminate both up/down ghosting without reverse LED voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 5.5 V - powers device and drives LED anodes; compatible with 1.8 V/3.3 V/5 V logic interfaces. |
| LED Drive Capability | Up to 12 LEDs (4×3 matrix) or 4 RGB LEDs - achieved via TCM with ¼, ⅓, ½, or 1× multiplexing ratio. |
| Constant Current Sink | 0.1 mA to 51 mA per channel - two ranges (25.5 mA / 51 mA) selected by global 1-bit MC; ±5% device-to-device and channel-to-channel error. |
| Ultra-Low Power | 0.4 mA typical active current at 25.5 mA LED load; 26 μA standby with data retention - reduces MCU polling and extends battery life. |
| I²C Interface | Up to 1 MHz (Fast-mode Plus) - supports up to 4 devices on same bus via unique chip address (LP5812ADSDR = 0x00). |
| Thermal Protection | 150 °C LED-driver thermal shutdown with 15 °C hysteresis - prevents latch-up during sustained high-current operation. |
| Open/Short Detection | Per-LED fault detection - open threshold: 70–110 mV (25.5 mA); short threshold: 0.32×VCC to 0.68×VCC (configurable). |
Pinout & Package
LP5812ADSDR is packaged in an 8-pin WSON (DSD) with 3 mm × 3 mm body size and exposed thermal pad. Pinout follows TI's standardized DSD top-view layout (Figure 5-2): pins 1–4 = VCC, SYNC, SCL, SDA; pins 5–8 = OUT3, OUT2, OUT1, OUT0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power input | Supplies internal circuitry and LED anode voltage; requires 22 μF capacitor to GND for stability. |
| SYNC | Multi-device sync I/O | Accepts external clock or outputs 6 MHz internal oscillator signal; connect to GND if unused to reduce power. |
| SCL | I²C clock input | Supports standard/fast/fast-mode Plus timing; 1 MHz max frequency enables rapid register writes for animation updates. |
| SDA | I²C data I/O | Bi-directional interface for configuration and status reads; 400 pF max bus capacitance limit applies. |
| OUT3–OUT0 | Bidirectional LED interface | Each integrates high-side scan FET + low-side current sink; configured as scan switch or sink per TCM cycle - no external components required. |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous animation engine | Offloads MCU by executing pre-programmed lighting sequences (fade, blink, chase) using on-chip registers - no runtime host intervention needed. |
| Configurable de-ghosting | Vmid-clamp eliminates visual artifacts in multiplexed displays by pre-charging/pre-discharging OUTx nodes during blank time - avoids reverse LED bias and preserves color fidelity. |
| Flexible drive modes | Direct (4 LEDs), TCM (12 LEDs), or mix mode (e.g., 3 RGB + 1 direct) - selected via led_mode bits; enables optimal PCB layout and current allocation per application. |
| Audible-noise-free PWM | 24 kHz max PWM frequency (pwm_fre = 0) - exceeds human hearing range, eliminating coil whine and flicker in consumer-facing indicators. |
| Integrated fault detection | Per-LED open/short detection with programmable thresholds - enables robust system-level diagnostics without external sense resistors or ADCs. |
Applications
| Smart Wearable Indicators | Gaming Peripheral Lighting |
|---|---|
|
Use Scenario: Real-time status feedback on earbuds, charging cases, and smartwatches with minimal PCB area. IC Role / Device Role / Timing Role: RGB LED driver with autonomous animation engine - manages color transitions, breathing effects, and battery-level pulses independently of main MCU. Use Value: Reduces firmware overhead by >70% vs. GPIO/PWM-driven solutions; 0.4 mA active current extends single-charge runtime by hours in always-on indicator use. |
Use Scenario: Dynamic, responsive lighting on RGB gaming mice, keyboards, and VR controllers. IC Role / Device Role / Timing Role: TCM-based LED controller - synchronizes lighting across multiple devices via SYNC pin and 6 MHz internal clock. Use Value: Enables frame-locked multi-device animations (e.g., ripple effects across mouse + headset) without host CPU coordination or latency jitter. |
| IoT Smart Device UI | Industrial HMI Status Panels |
|
Use Scenario: Visual alerts on e-tags, video doorbells, and smart plugs where size and power are critical. IC Role / Device Role / Timing Role: Low-power LED driver with I²C interface - accepts simple command packets to update brightness, color, and animation state. Use Value: 26 μA standby current with register retention allows instant wake-up from deep sleep; eliminates need for external non-volatile storage for LED state. |
Use Scenario: Fault/status indication on EV chargers and factory HMIs operating in extended temperature ranges. IC Role / Device Role / Timing Role: Robust LED driver with thermal shutdown (150 °C) and open/short detection - ensures fail-safe visual signaling under industrial stress. Use Value: ±5% current accuracy across –40 °C to +85 °C ambient guarantees consistent LED brightness and color point over full operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RGB LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP5813ADRRR | Boost-regulated power stage; higher VOUT headroom; 12-pin WSON package. | Required for driving high-Vf LEDs (e.g., white/blue) beyond 5.5 V supply; larger footprint. | Select when Vf > VCC - LP5812ADSDR cannot boost, limiting use to low-Vf red/green LEDs or systems with ≥5.5 V rail. |
| LP5810ADSDR | 4-channel linear driver only; no TCM; max 4 LEDs; identical WSON-8 package and pinout. | Targeted at simple direct-drive RGBW/RGBA applications - lacks matrix expansion and autonomous animation. | Choose for cost-sensitive, non-matrix designs where TCM and animation engine are unnecessary; drop-in replacement for pin-compatible layouts. |
Compared with LP5813ADRRR, LP5812ADSDR trades off boost capability for lower BOM count and smaller footprint; compared with LP5810ADSDR, it adds TCM scalability and autonomous control - making it optimal for compact, animated RGB matrices requiring zero-MCU runtime management.
Availability
LP5812ADSDR is available at Aetrix Electronics and suitable for portable electronics, gaming peripherals, IoT user interfaces, and industrial HMI applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LP5812ADSDR 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 power management technologies, with decades of expertise in precision LED control and low-power interface ICs.
The LP5812ADSDR belongs to TI's LP58xx family of autonomous RGB LED drivers, designed specifically for battery-powered, space-constrained consumer and industrial devices needing rich visual feedback without MCU resource burden.
FAQ
What drive modes does the LP5812ADSDR support, and how are they configured?
The LP5812ADSDR supports direct drive (4 LEDs), time-cross-multiplexing (TCM) mode (up to 12 LEDs), and mix mode - all selected via the led_mode bits in the Dev_Config_1 register. Direct mode uses OUT0–OUT3 as independent current sinks; TCM mode reconfigures them into a 4×3 matrix with programmable scan order; mix mode combines both. Configuration is performed over I²C, and LP5812ADSDR retains settings in standby.
How does the LP5812ADSDR achieve audible-noise-free LED dimming?
The LP5812ADSDR achieves audible-noise-free dimming by supporting a maximum PWM frequency of 24 kHz (pwm_fre = 0), which exceeds the human hearing range (20 Hz–20 kHz). Its integrated 8-bit PWM generator allows smooth brightness control with linear or exponential curves, and phase shift per LED minimizes current surge noise - all without external components. This behavior is fully implemented in LP5812ADSDR hardware.
Does the LP5812ADSDR require external current-setting resistors?
No, the LP5812ADSDR does not require external current-setting resistors. LED current is digitally programmed via two levels: a global 1-bit Maximum Current (MC) bit selecting either 25.5 mA or 51 mA range, and individual 8-bit Dot Current (DC) values per channel (0–255). This eliminates resistor tolerance errors and board space, and LP5812ADSDR maintains ±5% channel-to-channel accuracy across temperature.
Can multiple LP5812ADSDR devices be synchronized for coordinated lighting effects?
Yes, multiple LP5812ADSDR devices can be synchronized using the dedicated SYNC pin. When vsync_out_en = 1, LP5812ADSDR generates a precise 6 MHz clock on SYNC, which can drive other LP5812ADSDR units' SYNC inputs. This ensures frame-aligned TCM scanning and animation timing across devices - critical for seamless multi-unit lighting in products like RGB speaker arrays or modular controllers.
What is the thermal performance of the LP5812ADSDR in its WSON-8 package?
In its 3 mm × 3 mm WSON-8 (DSD) package, the LP5812ADSDR has a junction-to-board thermal resistance (RθJB) of 22.9 °C/W and junction-to-ambient (RθJA) of 50.8 °C/W. With thermal shutdown at 150 °C and 15 °C hysteresis, it safely handles continuous 51 mA per channel at +85 °C ambient when mounted on a 2-layer PCB with adequate copper pour - verified in TI's SNVSCC9C thermal characterization data.
LP5812ADSDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- Constant Current
- Internal Switch(s):
- Yes
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 500mV
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 0V ~ 5.5V
- Current - Output / Channel:
- 51mA
- Frequency:
- 500kHz, 1MHz
- Dimming:
- Analog, I2C, PWM
- Applications:
- General Purpose
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON (3x3)
LP5812ADSDR FAQ
1.How can I place an order for LP5812ADSDR through Aetrix?
Please submit a Request for Quotation (RFQ) for LP5812ADSDR 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 LP5812ADSDR reliable?
The price and inventory of LP5812ADSDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP5812ADSDR is usually 5 days.
3.What payment methods are accepted for LP5812ADSDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP5812ADSDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP5812ADSDR?
LP5812ADSDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP5812ADSDR 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 LP5812ADSDR?
For technical support, including LP5812ADSDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP5812ADSDR requirements.
6.How does Aetrix verify that LP5812ADSDR is sourced from the original manufacturer or authorized distributors?
All LP5812ADSDR 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 LP5812ADSDR meets industry standards.
7.What is the process for return or replacement of LP5812ADSDR?
All LP5812ADSDR units undergo pre-shipment inspection (PSI). If there is an issue with LP5812ADSDR, 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 LP5812ADSDR part is unused and in its original packaging.
Return procedure for LP5812ADSDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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