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Texas Instruments LP5812CYBHR
- Part No.:
- LP5812CYBHR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 9-BGA, DSBGA
- Datasheet:
-
LP5812CYBHR.pdf
- Description:
- 4 X 3 MATRIX RGB LED DRIVER WITH
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
LP5812CYBHR from Texas Instruments is a 4 × 3 matrix RGB LED driver with autonomous animation engine control, implementing time-cross-multiplexing (TCM) topology to drive up to 12 LEDs or 4 RGB LEDs using only four output pins. It delivers ultra-low active current (0.4 mA typical at 25.5 mA LED current), supports 2.7 V–5.5 V operation, and features 8-bit individual PWM dimming up to 24 kHz for audible-noise-free lighting in compact portable electronics.
For engineers reviewing the LP5812CYBHR datasheet, LP5812CYBHR pinout, LP5812CYBHR application, or LP5812CYBHR equivalent, this device enables space-constrained designs requiring autonomous LED animation, precise per-LED current control (±5% channel-to-channel error), low-headroom constant-current sinks (110 mV typ. at 25.5 mA), and I²C-controlled mix-drive mode flexibility across direct, TCM, and hybrid configurations.
Technical Context
The LP5812CYBHR integrates four high-side PMOS scan switches and four constant-current sinks in a single DSBGA-9 package, enabling TCM-based 4×3 matrix control with configurable scan order (1–4 scans) and blank-time insertion (1–2 µs) to eliminate ghosting. Its autonomous animation engine executes preloaded lighting sequences without MCU intervention, synchronized across multiple devices via a programmable 6 MHz internal oscillator and SYNC pin.
It supports three drive modes-direct (4 LEDs), TCM (up to 12 LEDs), and mix-drive-each with independent analog (8-bit DC + 1-bit MC) and PWM (8-bit, linear/exponential) dimming. Current sink headroom is minimized (110 mV typ. at 25.5 mA), and open/short LED detection operates per channel with programmable thresholds (70–220 mV).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 5.5 V - powers device directly from common system rails; logic pins tolerate 1.8 V/3.3 V/5 V I/O levels. |
| LED Drive Capacity | Up to 12 LEDs (4×3 matrix) or 4 RGB LEDs - achieved via time-cross-multiplexing with ¼ to 1 multiplexing ratio. |
| Constant Current Sink Range | 0.1 mA to 51 mA per channel - selectable via 1-bit global max-current (25.5/51 mA) and 8-bit dot current (256 steps). |
| Current Accuracy | ±5% device-to-device and ±5% channel-to-channel - ensures uniform brightness across multi-LED arrays without external calibration. |
| PWM Dimming Frequency | Up to 24 kHz (audible-noise-free) - eliminates perceptible flicker and acoustic noise in consumer-facing lighting. |
| Standby Current | 26 µA typical with data retention - enables always-on LED indication with negligible battery drain in wearables and IoT edge nodes. |
| I²C Interface Speed | Up to 1 MHz (Fast-mode Plus) - supports rapid configuration updates and real-time brightness adjustments in dynamic UIs. |
Pinout & Package
LP5812CYBHR is packaged in a 1.43 mm × 1.34 mm, 9-pin DSBGA (YBH) package with bottom-side thermal pad. Pin assignment follows TI's standardized YBH top-view layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT0–OUT3 | Bi-directional matrix node | Each combines high-side PMOS scan switch and low-side constant-current sink; configured dynamically as either scan line or current sink per TCM frame. |
| GND | Power ground / thermal pad | Must be connected to PCB ground plane; serves as primary thermal path for power dissipation in compact layouts. |
| VCC | Supply input | Accepts 2.7–5.5 V; requires 22 µF capacitor near pin for stable boost converter operation and low-noise LED driving. |
| SCL / SDA | I²C interface | Standard bidirectional I²C bus pins supporting up to 1 MHz; compatible with 1.8 V/3.3 V/5 V logic levels. |
| SYNC | Multi-device synchronization | Input/output pin for daisy-chaining or master-slave timing alignment; can be grounded if unused to reduce leakage. |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous animation engine | Executes pre-programmed lighting sequences independently of host MCU, reducing real-time firmware load and latency in interactive UIs. |
| Integrated de-ghosting | Clamps outputs to mid-rail voltage (Vmid) during blank time to eliminate both upside and downside ghosting in multiplexed RGB matrices. |
| Configurable drive modes | Direct, TCM, and mix-drive modes allow flexible LED count and layout support-from single RGBW to full 4×3 matrix-without hardware changes. |
| Per-LED open/short detection | Detects fault conditions individually on each LED node with programmable voltage thresholds (70–220 mV), enabling robust field diagnostics. |
| Ultra-low headroom current sinks | 110 mV typical saturation voltage at 25.5 mA allows use with low-Vf LEDs (e.g., red/green) while maintaining regulation margin. |
Applications
| Smart Wearable Indicators | RGB Gaming Peripherals |
|---|---|
Use Scenario: Real-time status feedback on earbuds, charging cases, and smartwatches with minimal PCB area and battery impact. IC Role / Device Role / Timing Role: Autonomous LED driver managing multi-color animations and battery-level indicators without MCU polling. Use Value: 26 µA standby current and 0.4 mA active draw extend battery life; TCM topology reduces required routing layers and component count. |
Use Scenario: Dynamic, responsive lighting on RGB mice, keyboards, and VR controllers synchronized across multiple devices. IC Role / Device Role / Timing Role: Synchronized lighting controller using 6 MHz internal oscillator and SYNC pin for frame-aligned effects. Use Value: 24 kHz PWM dimming eliminates audible coil whine; mix-drive mode supports both discrete status LEDs and full RGB zones on same board. |
| IoT Edge Device UI | Industrial HMI Lighting |
Use Scenario: Visual alerts and branding illumination on video doorbells, e-tags, and smart home hubs operating in temperature extremes. IC Role / Device Role / Timing Role: Robust LED driver with –40°C to +85°C operation, open/short detection, and thermal shutdown (150°C). Use Value: ±5% current accuracy ensures consistent color balance across units; I²C address variants (e.g., LP5812CYBHR) enable up to 4 devices on one bus. |
Use Scenario: Operator feedback lighting on EV chargers and factory HMIs where reliability and ESD immunity are critical. IC Role / Device Role / Timing Role: Fault-tolerant LED driver with ±4 kV HBM ESD rating and integrated LED diagnostics for maintenance-free operation. Use Value: De-ghosting circuitry prevents false illumination in noisy industrial environments; low 110 mV headroom supports aging LED forward-voltage drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RGB LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP5812BYBHR | Different I²C chip address (bit 3 = 1, bit 4 = 0); identical electrical specs and pinout. | Same functionality; used when multiple LP5812 devices share one I²C bus. | Select LP5812CYBHR when addressing as slave 0x2A (bit 4=1, bit 3=0) is required in multi-device systems. |
| LP5813CYBHR | Boost-power-stage architecture vs. LP5812CYBHR's linear stage; higher VOUT capability; DSBGA-12 package. | Better suited for driving higher-Vf LEDs (e.g., blue/white) across longer traces; larger footprint and higher BOM cost. | Choose LP5812CYBHR for low-Vf RGB arrays (<2.2 V), space-constrained designs, and ultra-low quiescent current requirements. |
Compared with LP5812BYBHR, LP5812CYBHR offers identical performance but distinct I²C addressing for multi-drop bus expansion; versus LP5813CYBHR, it trades off higher LED forward-voltage support for smaller size, lower power, and simpler power design in compact consumer applications.
Availability
LP5812CYBHR is available at Aetrix Electronics and suitable for smart wearable electronics, RGB gaming peripherals, and IoT edge device UIs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LP5812CYBHR 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 and embedded processing technologies, with decades of expertise in precision power management and interface solutions.
The LP5812CYBHR belongs to TI's LP58xx family of autonomous LED drivers, engineered specifically for space- and power-constrained consumer electronics requiring rich, synchronized lighting with minimal MCU overhead.
FAQ
What drive modes does the LP5812CYBHR support, and how do they differ?
The LP5812CYBHR supports direct drive (up to 4 LEDs), time-cross-multiplexing (TCM) drive (up to 12 LEDs), and mix-drive (combination of both). Direct mode uses each OUTx solely as a constant-current sink; TCM mode dynamically assigns each OUTx as either scan switch or sink per frame; mix-drive configures some outputs for direct control and others for TCM, enabling hybrid LED layouts. All modes are software-configurable via I²C registers in the LP5812CYBHR.
How does the LP5812CYBHR achieve ghosting elimination in multiplexed LED matrices?
The LP5812CYBHR eliminates ghosting by clamping all non-active OUTx pins to a mid-rail voltage (Vmid) during blank time and PWM-off periods. This pre-charges current sinks and pre-discharges scan switches simultaneously, preventing unintended LED turn-on due to capacitive coupling or residual charge. The Vmid level is programmable (four options) to match LED forward-voltage ranges, and clamping is enabled by default in the LP5812CYBHR's Dev_Config12 register.
What is the significance of the 'CY' suffix in LP5812CYBHR, and how does it affect system design?
The 'CY' suffix in LP5812CYBHR denotes its I²C chip address configuration: bit 4 = 1 and bit 3 = 0, resulting in a 7-bit address of 0x2A. This allows up to four LP5812 variants (AY, BY, CY, DY) to coexist on the same I²C bus without address conflict. In system design, selecting LP5812CYBHR ensures predictable communication in multi-driver architectures-such as multi-zone lighting panels-where address uniqueness is mandatory for individual control.
Can the LP5812CYBHR drive standard 20 mA RGB LEDs reliably across temperature and voltage variations?
Yes. The LP5812CYBHR delivers ±5% channel-to-channel and device-to-device current accuracy from –40°C to +85°C, with headroom as low as 110 mV at 25.5 mA. Its constant-current sinks maintain regulation even as VCC drops to 2.7 V or LED forward voltage shifts with temperature. For 20 mA RGB LEDs, the LP5812CYBHR's 0.1–51 mA range, 8-bit dot current control, and thermal shutdown (150°C) ensure stable, consistent illumination across environmental and supply variations.
Does the LP5812CYBHR require external components for basic operation, and what are the critical ones?
Yes. The LP5812CYBHR requires a 22 µF input capacitor between VCC and GND (placed close to the device) for stable boost converter operation, plus 1 µF ceramic decoupling capacitors on VCC and each OUTx pin. Pull-up resistors (4.7 kΩ) on SCL/SDA are needed for I²C compliance. No external current-setting resistors are required-the LP5812CYBHR's current is fully programmable via registers, simplifying BOM and layout.
LP5812CYBHR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 9-BGA, DSBGA
- 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:
- 9-DSBGA (1.43x1.43)
LP5812CYBHR FAQ
1.How can I place an order for LP5812CYBHR through Aetrix?
Please submit a Request for Quotation (RFQ) for LP5812CYBHR 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 LP5812CYBHR reliable?
The price and inventory of LP5812CYBHR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP5812CYBHR is usually 5 days.
3.What payment methods are accepted for LP5812CYBHR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP5812CYBHR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP5812CYBHR?
LP5812CYBHR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP5812CYBHR 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 LP5812CYBHR?
For technical support, including LP5812CYBHR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP5812CYBHR requirements.
6.How does Aetrix verify that LP5812CYBHR is sourced from the original manufacturer or authorized distributors?
All LP5812CYBHR 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 LP5812CYBHR meets industry standards.
7.What is the process for return or replacement of LP5812CYBHR?
All LP5812CYBHR units undergo pre-shipment inspection (PSI). If there is an issue with LP5812CYBHR, 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 LP5812CYBHR part is unused and in its original packaging.
Return procedure for LP5812CYBHR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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