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Texas Instruments LP5811DYBHR
- Part No.:
- LP5811DYBHR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 12-BGA, DSBGA
- Datasheet:
-
LP5811DYBHR.pdf
- Description:
- 12 RGB LED SYNCHRONOUS BOOST DRI
- Quantity:
- Payment:
- Shipping:
Inventory:2,989
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Product details
Overview
LP5811DYBHR from Texas Instruments is a synchronous boost 4-channel RGBW LED driver with autonomous animation engine, designed for battery-powered portable electronics. It operates from 0.5V to 5.5V input, delivers 3V–5.5V regulated output via integrated 140mΩ/60mΩ MOSFETs, supports 0.1–51mA per channel with ±5% device-to-device and channel-to-channel current accuracy, and enables audible-noise-free 24kHz PWM dimming - ideal for earbud status lighting and smartwatch indicators.
For engineers reviewing the LP5811DYBHR datasheet, LP5811DYBHR pinout, LP5811DYBHR application, or LP5811DYBHR equivalent, key selection considerations include its ultra-low 0.45mA active current at 25.5mA LED drive, true input-output disconnection in shutdown (0.1μA), 12-pin DSBGA package (1.84mm × 1.43mm), and I²C-compatible autonomous animation control for multi-device synchronized lighting effects.
Technical Context
The LP5811DYBHR integrates a quasi-constant-frequency synchronous boost converter (1MHz PWM / 0.5MHz PFM) with valley-current limiting (1.6A), soft-start (450μs), and pass-through mode when VIN > VOUT. Its digital core includes an autonomous animation engine generating 6MHz sync clock, individual 8-bit PWM + 8-bit analog (dot current) dimming per channel, and configurable linear/exponential curves.
It implements de-ghosting, LED open/short detection (70–220mV open threshold, VOUT-based short threshold), and dual-level thermal shutdown (150°C LED driver / 155°C boost). Logic pins support 1.8V/3.3V/5V I/O, and the device uses a 12-pin DSBGA (YBH) package with 0.4mm pitch and 0.19mm height.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input voltage range | 0.5V to 5.5V; supports single-cell Li-ion down to partial discharge and enables operation from weak batteries. |
| Boost output voltage | 3.0V to 5.5V in 0.1V steps; matches forward voltage of RGBW LEDs across temperature and aging. |
| LED current range | 0.1mA–51mA per channel; selectable via 1-bit max current (25.5/51mA) and 8-bit dot current (256 steps). |
| Current accuracy | ±5% device-to-device and channel-to-channel error; ensures consistent brightness across LEDs and units. |
| PWM dimming frequency | Up to 24kHz (audible-noise-free); eliminates perceptible flicker while enabling smooth human-eye-friendly transitions. |
| Shutdown current | 0.1μA typical; enables multi-year battery life in always-on wearable indicator applications. |
| I²C interface speed | Up to 1MHz Fast-mode Plus; allows rapid configuration of all 4 channels and animation registers without MCU overhead. |
Pinout & Package
LP5811DYBHR uses a 12-pin DSBGA (YBH) package measuring 1.84mm × 1.43mm with 0.4mm pitch and 0.19mm profile - optimized for space-constrained portable designs like earbuds and wearables.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable input | Active-high control of boost converter; <0.42V disables boost and disconnects input from output. |
| VIN | Power supply input | Accepts 0.5V–5.5V; powers internal circuitry and feeds boost inductor via SW pin. |
| SW | Boost switch node | Connects to inductor; drives high-side (140mΩ) and low-side (60mΩ) MOSFETs in synchronous topology. |
| OUT0–OUT3 | Constant-current LED sinks | Four independent outputs; each sources current to RGBW anodes (or cathodes in sink configuration) with 110mV headroom at 25.5mA. |
| GND | Ground reference | Common return for boost, logic, and LED current paths; requires low-impedance PCB plane connection. |
| VOUT | Boost output | Regulated 3V–5.5V supply; powers LED drivers and can feed external loads (e.g., MCU I/O rails). |
| SYNC | Multi-device synchronization | Input/output for daisy-chaining multiple LP581x devices; enables frame-aligned lighting animations across PCBs. |
| SCL/SDA | I²C interface | Standard 1MHz-capable bus; supports up to four devices on same bus via unique chip address bits (A1/A0 = 11 for DYBHR). |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous animation engine | On-chip sequencer executes preloaded lighting patterns without MCU intervention - reduces host processor load by >90% in static indicator modes. |
| Ultra-low headroom voltage | 110mV typical at 25.5mA; minimizes power loss and heat in compact RGBW LED strings with low forward-voltage white LEDs. |
| True input-output disconnection | Internal FETs fully isolate VIN from VOUT during shutdown; prevents battery drain through leakage paths in always-connected systems. |
| Integrated de-ghosting | Hardware-level cross-talk suppression between OUT0–OUT3; eliminates false illumination during fast PWM transitions in multiplexed layouts. |
| Individual LED fault detection | Detects open (70–220mV threshold) and short (32–68% of VOUT) conditions per channel; reports status via I²C register for system-level diagnostics. |
Applications
| Earbud Charging Case Indicator | Smartwatch Status Lighting |
|---|---|
Use Scenario: Real-time battery level and pairing status indication on compact wireless earbud charging cases. IC Role / Device Role / Timing Role: RGBW LED driver with autonomous animation engine managing color-coded breathing, pulsing, and solid-state sequences. Use Value: Eliminates need for dedicated MCU GPIOs and timing firmware; achieves <1μA standby current to preserve case battery for months. |
Use Scenario: Always-on ambient light sensing-triggered status illumination on wrist-worn devices with strict size and power constraints. IC Role / Device Role / Timing Role: Synchronous boost LED driver supplying stable 5V to high-efficiency micro-LEDs while operating from 3.0V coin cell or thin-film battery. Use Value: 0.45mA active current at full brightness extends usable battery life beyond 7 days; 1.84mm × 1.43mm DSBGA fits under curved watch bezels. |
| VR Headset Power-On Sequence | IoT Video Doorbell Notification |
Use Scenario: Multi-color boot-up and mode transition lighting during VR headset initialization and user interaction. IC Role / Device Role / Timing Role: Autonomous animation controller synchronizing RGBW effects across left/right display housings using 6MHz SYNC signal. Use Value: Enables coordinated visual feedback without inter-PCB cabling or master-slave firmware coordination; reduces BOM count by 2x vs discrete drivers. |
Use Scenario: Low-power, tamper-resistant notification lighting on battery-operated video doorbells exposed to wide temperature ranges. IC Role / Device Role / Timing Role: 4-channel LED driver with -40°C to +85°C operation, open/short detection, and I²C-configurable dimming curves for daylight visibility. Use Value: ±5% channel matching ensures uniform color balance across seasons; 24kHz PWM prevents interference with audio codecs and image sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-channel RGBW LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP5811ADRRR | Same silicon, WSON-12 package (3mm × 3mm); higher thermal resistance (RθJA = 47.5°C/W vs 92.1°C/W for DSBGA) | Better suited for thermally demanding industrial HMI where board space permits larger footprint | Select LP5811ADRRR when PCB layout requires exposed pad thermal relief or reflow compatibility with standard QFN processes. |
| LP5810DYBHR | Linear-regulator-based architecture; no boost stage; max 5.5V input; 0.1–51mA per channel; 9-pin DSBGA | Lower efficiency at low VIN; limited to applications where input ≥ LED forward voltage (e.g., 5V USB-powered devices) | Choose LP5810DYBHR only if system input is stable ≥3.3V and ultra-low EMI is prioritized over battery runtime. |
Compared with LP5811ADRRR and LP5810DYBHR, the LP5811DYBHR uniquely combines ultra-compact DSBGA packaging, synchronous boost efficiency across 0.5V–5.5V input, and autonomous animation - making it the sole option for space- and battery-constrained RGBW indicator systems requiring wide-input operation.
Availability
LP5811DYBHR is available at Aetrix Electronics and suitable for portable electronics, wearable indicators, and IoT edge devices requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LP5811DYBHR 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 power management and LED driver innovation.
The LP5811DYBHR belongs to TI's LP58xx family of intelligent LED drivers, engineered specifically for battery-powered portable and wearable applications demanding ultra-low quiescent current, autonomous lighting control, and minimal PCB footprint.
FAQ
What is the minimum input voltage required to start up the LP5811DYBHR?
The LP5811DYBHR requires a minimum of 1.8V on VIN to initiate startup; once enabled and regulated, it continues operating down to 0.5V input. This two-stage UVLO (1.8V rising / 0.4V falling) ensures reliable turn-on from partially discharged batteries while preventing brownout oscillation. The LP5811DYBHR's 450μs soft-start sequence begins only after EN is asserted high and VIN exceeds 1.8V.
How does the LP5811DYBHR achieve audible-noise-free PWM dimming?
The LP5811DYBHR integrates a programmable 8-bit PWM generator supporting frequencies up to 24kHz - well above the human hearing range (20kHz). Its linear or exponential dimming curve options ensure smooth brightness transitions without stepping artifacts. This capability is implemented entirely within the LP5811DYBHR's autonomous engine, eliminating MCU timing jitter that could cause beat frequencies or audible coil whine in external drivers.
Can the LP5811DYBHR drive LEDs directly from a 1.5V alkaline battery?
Yes - the LP5811DYBHR's synchronous boost converter accepts inputs as low as 0.5V and starts regulation at 1.8V, making it compatible with single 1.5V alkaline cells. At 1.5V input, the boost operates in PFM mode (0.5MHz) to maximize efficiency, delivering up to 5.5V at sufficient current to drive RGBW LEDs. The LP5811DYBHR maintains ±5% current accuracy even at this low VIN, ensuring consistent color fidelity throughout battery discharge.
What package type is used for the LP5811DYBHR, and why is it suitable for wearables?
The LP5811DYBHR uses a 12-pin DSBGA (YBH) package measuring 1.84mm × 1.43mm with 0.4mm pitch and 0.19mm height. This ultra-compact, low-profile ball-grid array enables placement beneath curved watch bezels or inside slim earbud stems. Its solder-ball construction provides superior mechanical reliability under repeated flex stress compared to QFN, and the small thermal mass supports rapid reflow without adjacent component damage - critical for high-density wearable PCBs.
Does the LP5811DYBHR support synchronization across multiple devices, and how is it implemented?
Yes - the LP5811DYBHR features a dedicated SYNC pin that accepts or generates a 6MHz clock signal to synchronize lighting animations across multiple LP581x devices. When configured as master, the LP5811DYBHR drives SYNC high; as slave, it locks to incoming SYNC edges. This hardware-level coordination eliminates software timing drift and enables frame-perfect multi-PCB effects (e.g., seamless light bars across VR headset housings), all managed autonomously without MCU involvement.
LP5811DYBHR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 12-BGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 0.5V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 3V ~ 5.5V
- Current - Output / Channel:
- 1.6A
- Frequency:
- 500kHz, 1MHz
- Dimming:
- Analog, PWM
- Applications:
- General Purpose
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DSBGA (1.84x1.43)
LP5811DYBHR FAQ
1.How can I place an order for LP5811DYBHR through Aetrix?
Please submit a Request for Quotation (RFQ) for LP5811DYBHR 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 LP5811DYBHR reliable?
The price and inventory of LP5811DYBHR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP5811DYBHR is usually 5 days.
3.What payment methods are accepted for LP5811DYBHR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP5811DYBHR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP5811DYBHR?
LP5811DYBHR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP5811DYBHR 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 LP5811DYBHR?
For technical support, including LP5811DYBHR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP5811DYBHR requirements.
6.How does Aetrix verify that LP5811DYBHR is sourced from the original manufacturer or authorized distributors?
All LP5811DYBHR 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 LP5811DYBHR meets industry standards.
7.What is the process for return or replacement of LP5811DYBHR?
All LP5811DYBHR units undergo pre-shipment inspection (PSI). If there is an issue with LP5811DYBHR, 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 LP5811DYBHR part is unused and in its original packaging.
Return procedure for LP5811DYBHR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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