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Texas Instruments LP5812DDSDR
- Part No.:
- LP5812DDSDR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
LP5812DDSDR.pdf
- Description:
- 4 X 3 MATRIX RGB LED DRIVER WITH
- Quantity:
- Payment:
- Shipping:
Inventory:1,939
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Product details
Overview
LP5812DDSDR 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. It delivers 0.1–51 mA per channel with ±5% device-to-device and channel-to-channel current accuracy, ultra-low 0.4 mA active supply current at 25.5 mA LED load, and supports audible-noise-free 24 kHz PWM dimming. It is used in compact wearable indicators and RGB lighting control for earbuds and smartwatches.
For engineers reviewing the LP5812DDSDR datasheet, LP5812DDSDR pinout, LP5812DDSDR application, or LP5812DDSDR equivalent, key selection criteria include its WSON-8 package footprint, I²C-compatible 1 MHz interface, TCM-driven 12-LED matrix capability, autonomous animation register programming, and thermal shutdown protection at 150°C junction temperature.
Technical Context
The LP5812DDSDR implements a time-cross-multiplexing (TCM) architecture combining 4 high-side PMOS scan switches and 4 low-side constant current sinks in one output pin (e.g., OUT0 contains both functions), enabling 4×3 matrix control with configurable ¼ to 1 multiplexing ratios. It supports direct, TCM, and mix-drive modes via 'led_mode' register bits.
Its autonomous animation engine executes preloaded LED sequences without MCU intervention, synchronized across multiple devices using its internal 6 MHz oscillator and SYNC pin. Analog dimming uses global 1-bit max-current (25.5/51 mA) and per-channel 8-bit dot-current; PWM dimming offers 8-bit resolution with linear or exponential curves up to 24 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 5.5 V - powers logic and LED drive circuitry; compatible with 3.3 V and 5 V systems. |
| LED Current Range | 0.1 mA to 51 mA per sink - selectable via 1-bit MC (25.5/51 mA) and 8-bit DC registers. |
| Current Accuracy | ±5% device-to-device and channel-to-channel - ensures uniform brightness across all 12 LEDs in matrix configurations. |
| PWM Frequency | Up to 24 kHz - eliminates audible noise in consumer audio-adjacent devices like earbuds and VR headsets. |
| I²C Speed | Up to 1 MHz (Fast-mode Plus) - enables rapid configuration of 12 LED channels and animation parameters. |
| Operating Temp | −40°C to +85°C - qualified for industrial and portable electronics environments including EV chargers and wearables. |
| Standby Current | 26 μA typical - retains register state while minimizing battery drain during idle periods in battery-powered devices. |
Pinout & Package
LP5812DDSDR is packaged in an 8-pin WSON (3 mm × 3 mm) with exposed thermal pad. Pin functions are validated per TI SNVSCC9C datasheet Figure 5-2 and Table 5-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT0–OUT3 | Combined high-side scan switch + low-side current sink | Each pin drives one row/column in TCM matrix; supports direct-drive (4 LEDs) or TCM (12 LEDs); must float if unused. |
| VCC | Power input | Supplies internal logic and LED drive circuitry; requires 22 μF capacitor to GND per datasheet recommendation. |
| GND | Ground reference | Thermal pad connection point; must be connected to common ground plane for thermal and electrical stability. |
| SCL / SDA | I²C interface | Standard bidirectional I²C bus pins; support 1 MHz Fast-mode Plus timing; VIH = 1.4 V min, VOL = 0.4 V max. |
| SYNC | Multi-device synchronization I/O | Accepts external clock or outputs 6 MHz sync signal; can be grounded to reduce power if unused. |
Key Features
| Feature | Design Value |
|---|---|
| Time-Cross-Multiplexing (TCM) | Enables 4×3 matrix (12 LED) control using only 4 pins - reduces PCB routing complexity and component count vs. discrete drivers. |
| Autonomous Animation Engine | Executes stored lighting sequences independently - offloads real-time MCU processing for smooth, low-latency effects in wearables. |
| Integrated De-ghosting | Clamps OUTx to Vmid during blank time - eliminates visual ghosting in multiplexed RGB displays without external circuitry. |
| LED Open/Short Detection | Detects fault conditions per LED using VLOD_TH (70–220 mV) and VLSD_TH (32–68% VCC) thresholds - enables system-level reliability monitoring. |
| Ultra-Low Headroom Voltage | 110 mV typical at 25.5 mA - minimizes voltage overhead, allowing operation with low-Vf LEDs or tight supply margins. |
Applications
| Smart Wearable Indicators | RGB Gaming Peripherals |
|---|---|
|
Use Scenario: Real-time status feedback on compact earbud charging cases and smartwatches with space-constrained PCBs. IC Role / Device Role / Timing Role: Matrix LED driver with autonomous animation engine managing 12 RGB dots via TCM; synchronizes lighting across paired earbuds using SYNC pin. Use Value: Reduces MCU firmware overhead by >70% versus software-timed PWM; enables battery-efficient 26 μA standby with retained animation state. |
Use Scenario: Dynamic ambient lighting and button illumination in RGB gaming mice and VR controllers requiring flicker-free visual response. IC Role / Device Role / Timing Role: Constant-current sink driver delivering 24 kHz PWM to 4 RGB LEDs; leverages exponential dimming curve for perceptually linear brightness control. Use Value: Eliminates audible coil whine common in <1 kHz PWM drivers; ±5% current matching ensures color consistency across multi-LED zones. |
| IoT Smart Tags | Industrial HMI Panels |
|
Use Scenario: Low-power E-tag and video doorbell status indicators operating from coin cells or energy-harvested sources. IC Role / Device Role / Timing Role: Direct-drive mode controlling 4 discrete LEDs; uses 0.4 mA active current and 26 μA standby to extend battery life beyond 12 months. Use Value: Integrates open/short detection and thermal shutdown - enables self-diagnostics without additional sense resistors or microcontroller polling. |
Use Scenario: Operator-facing status lighting on EV charging stations and factory HMIs exposed to wide temperature swings (−40°C to +85°C). IC Role / Device Role / Timing Role: Robust LED driver with 150°C thermal shutdown and ±5% current accuracy over full temperature range - maintains consistent luminance in uncontrolled environments. Use Value: WSON-8 package provides superior thermal resistance (50.8°C/W RθJA) vs. DSBGA - sustains 51 mA drive capability under sustained industrial ambient loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RGB LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP5812ADSDR | I²C address bit 4 = 0, bit 3 = 0 (vs. DDSDR: bit 4 = 1, bit 3 = 1); identical electrical specs and package. | Same TCM matrix capability and autonomous animation features; differs only in I²C address for multi-device bus sharing. | Select LP5812ADSDR when building systems with ≤4 LP5812 devices on one I²C bus and requiring address 0x54. |
| LP5813DDRRR | Boost-based architecture (vs. LP5812DDSDR's linear regulation); 12-pin WSON; supports higher Vf LEDs via regulated boost output. | Better suited for driving high-forward-voltage white or blue LEDs where VCC < Vf; consumes more quiescent current (1.2 mA typical active). | Choose LP5812DDSDR for ultra-low-power battery applications with standard RGB LEDs; select LP5813DDRRR only when Vf exceeds VCC margin. |
Compared with LP5812ADSDR, LP5812DDSDR enables unique I²C addressing on shared buses without hardware changes; versus LP5813DDRRR, it trades boost flexibility for 65% lower active current and smaller 8-pin WSON footprint-critical for space- and power-constrained wearables.
Availability
LP5812DDSDR is available at Aetrix Electronics and suitable for smart wearable indicators, RGB gaming peripherals, and industrial HMI panels requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for LP5812DDSDR 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 solutions.
The LP5812DDSDR belongs to TI's LP58xx family of autonomous RGB LED drivers designed specifically for space-constrained, battery-sensitive consumer and industrial lighting applications requiring flicker-free, synchronized multi-LED effects.
FAQ
What is the I²C address of LP5812DDSDR?
The LP5812DDSDR has fixed I²C slave address 0x56, determined by its package variant (bit 4 = 1, bit 3 = 1). This allows up to four LP5812 devices-including LP5812ADSDR (0x54), LP5812BDSDR (0x55), and LP5812CDSDR (0x57)-to coexist on the same I²C bus without address conflict. The address is hardwired and not software-configurable.
Does LP5812DDSDR support direct-drive mode for single LEDs?
Yes, LP5812DDSDR supports direct-drive mode (led_mode = 0h) where each of the four OUTx pins operates exclusively as a constant current sink, driving up to four discrete LEDs or one RGBW device. In this mode, no TCM scanning occurs, and full 51 mA per channel is available with minimal timing overhead-ideal for simple status indicators.
How does the de-ghosting function work in LP5812DDSDR?
LP5812DDSDR implements hardware de-ghosting by clamping OUTx pins to a mid-rail voltage (Vmid) during PWM off and blank periods. Vmid is programmable (via vmid_sel) to match LED forward voltage ranges, preventing reverse bias and eliminating both up-side and down-side ghosting in multiplexed matrices without external components.
What is the maximum number of LEDs LP5812DDSDR can drive?
LP5812DDSDR can drive up to 12 LEDs in TCM mode (4×3 matrix), 4 LEDs in direct-drive mode, or a hybrid combination in mix-drive mode (e.g., 3 TCM-scanned LEDs + 1 direct-driven LED). Total LED count depends on selected drive mode and scan configuration-not a fixed upper limit across all topologies.
Is LP5812DDSDR compatible with 1.8 V logic interfaces?
Yes, LP5812DDSDR logic pins (SCL, SDA, SYNC) accept 1.8 V, 3.3 V, and 5 V input levels per datasheet specification (VIH_LOGIC ≥ 1.4 V). Its I/O structure is voltage-tolerant, enabling seamless integration with mixed-voltage systems such as 1.8 V MCUs interfacing to 3.3 V or 5 V peripheral rails.
LP5812DDSDR 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)
LP5812DDSDR FAQ
1.How can I place an order for LP5812DDSDR through Aetrix?
Please submit a Request for Quotation (RFQ) for LP5812DDSDR 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 LP5812DDSDR reliable?
The price and inventory of LP5812DDSDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP5812DDSDR is usually 5 days.
3.What payment methods are accepted for LP5812DDSDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP5812DDSDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP5812DDSDR?
LP5812DDSDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP5812DDSDR 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 LP5812DDSDR?
For technical support, including LP5812DDSDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP5812DDSDR requirements.
6.How does Aetrix verify that LP5812DDSDR is sourced from the original manufacturer or authorized distributors?
All LP5812DDSDR 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 LP5812DDSDR meets industry standards.
7.What is the process for return or replacement of LP5812DDSDR?
All LP5812DDSDR units undergo pre-shipment inspection (PSI). If there is an issue with LP5812DDSDR, 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 LP5812DDSDR part is unused and in its original packaging.
Return procedure for LP5812DDSDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP5812DDSDR Tags
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