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Texas Instruments LP5811BYBHR
- Part No.:
- LP5811BYBHR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 12-BGA, DSBGA
- Datasheet:
-
LP5811BYBHR.pdf
- Description:
- 12 RGB LED SYNCHRONOUS BOOST DRI
- Quantity:
- Payment:
- Shipping:
Inventory:2,322
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Product details
Overview
LP5811BYBHR 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, supports 0.1–51mA per channel with ±5% channel-to-channel current matching, and enables audible-noise-free 24kHz PWM dimming - ideal for earbud status lighting and smartwatch indicators.
For engineers reviewing the LP5811BYBHR datasheet, LP5811BYBHR pinout, LP5811BYBHR application, or LP5811BYBHR equivalent, this page provides verified technical context, DSBGA-12 package mapping, real-world dimming performance data, and validated alternative options for RGBW LED system design.
Technical Context
The LP5811BYBHR integrates a synchronous boost converter with 140mΩ/60mΩ HS/LS MOSFETs and 1.6A valley current limit, operating in adaptive constant-on-time PWM mode (1MHz at VIN > 1.5V) or PFM at light load. Its autonomous animation engine executes preloaded lighting sequences without MCU intervention using internal 6MHz clock synchronization.
It combines dual dimming control: 8-bit analog dot-current (DC) setting per channel with global 1-bit max-current (MC) selection (25.5mA or 51mA), plus 8-bit PWM with linear/exponential curves and configurable phase shift. Integrated de-ghosting, LED open/short detection (70–220mV LOD threshold), and true input-output disconnection during shutdown ensure robust operation in space-constrained wearables.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input voltage range | 0.5V to 5.5V - supports single-cell Li-ion down to near-dead battery; 1.8V min startup enables reliable cold boot. |
| 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 to 51mA per channel - covers indicator (0.1–1mA) and high-brightness (25.5–51mA) use cases with one device. |
| Current accuracy | ±5% device-to-device and channel-to-channel - ensures uniform color mixing and consistent brightness in multi-LED arrays. |
| PWM frequency | Up to 24kHz - eliminates audible coil whine in earbuds, VR headsets, and portable speakers. |
| I²C interface | Up to 1MHz Fast-mode Plus - enables rapid configuration of 4 independent channels and animation registers. |
| Shutdown current | 0.1μA typical - extends battery life in always-on wearable devices with periodic wake-up lighting. |
Pinout & Package
LP5811BYBHR uses a 12-pin DSBGA package (1.84mm × 1.43mm, 0.4mm pitch) optimized for ultra-compact portable designs. The YBH variant features bottom-side solder balls with standardized I/O placement for automated assembly and thermal reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable input | Active-high control of boost converter; <1.2V disables boost, <0.42V forces full shutdown with 0.1μA quiescent draw. |
| VIN | Main power input | Accepts 0.5–5.5V supply; requires 10μF local ceramic capacitor for stability and low-ESR transient response. |
| SW | Boost switch node | Connects to inductor; carries high di/dt switching current - requires short, wide trace and ground plane clearance. |
| GND | Power and signal reference | Single common ground plane required; ties internal LDO, logic, and LED sink return paths. |
| VOUT | Boost output | Regulated 3–5.5V supply for LEDs and external loads; requires 22μF bulk capacitance for ripple suppression. |
| OUT0–OUT3 | Constant-current LED sinks | Four independent 0.1–51mA sinks with 110mV headroom at 25.5mA - enables low-Vf red/green/blue/white LED drive. |
| SCL/SDA | I²C interface | 1MHz Fast-mode Plus compatible; supports up to four LP581x devices on same bus via unique chip address bits. |
| SYNC | Multi-device synchronization | Accepts or outputs 6MHz clock to align PWM timing across multiple LP5811BYBHR units for seamless lighting effects. |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous animation engine | Executes pre-programmed lighting sequences (fade, breathe, chase) without MCU CPU cycles - reduces host firmware overhead in resource-limited wearables. |
| Ultra-low headroom voltage | 110mV typical at 25.5mA - allows direct drive of low-forward-voltage red LEDs even when VOUT is set to minimum 3.0V. |
| True input-output disconnection | Internal FET disconnects VIN from VOUT during shutdown - prevents backfeed and leakage into depleted battery systems. |
| Integrated de-ghosting | Hardware-level cross-talk suppression between OUT0–OUT3 - eliminates false illumination during fast PWM transitions in dense PCB layouts. |
| Individual LED fault detection | Detects open-circuit (70–220mV threshold) and short-circuit (32–68% of VOUT) per channel - enables fail-safe status reporting in safety-critical indicators. |
Applications
| Earbud Charging Case Indicator | Smartwatch Status Lighting |
|---|---|
Use Scenario: Real-time battery level and pairing status indication on compact wireless earbud charging case lids. IC Role / Device Role / Timing Role: RGBW LED driver with autonomous animation engine generating breathing/fade effects synchronized across multiple LEDs. Use Value: Eliminates need for dedicated MCU GPIO and PWM timers; 0.1μA shutdown current preserves case battery for weeks in standby. |
Use Scenario: Always-on ambient light sensing-triggered notification rings and health metric visualization on curved watch displays. IC Role / Device Role / Timing Role: Constant-current sink delivering precise 0.1–51mA per channel with 24kHz PWM to avoid audible noise near user's ear. Use Value: 110mV headroom enables efficient drive of red/green micro-LEDs at 3.0V VOUT, reducing thermal load in sealed watch enclosures. |
| VR Headset Power-On Sequence | IoT Video Doorbell LED Ring |
Use Scenario: Multi-color boot-up animation and motion-triggered feedback lighting inside lightweight VR headset housings. IC Role / Device Role / Timing Role: Synchronous boost converter powers RGBW LEDs while also supplying auxiliary sensors from same VOUT rail. Use Value: Pass-through mode activates when VIN > VOUT setting - improves efficiency during USB-C powered operation without extra regulators. |
Use Scenario: Outdoor-facing LED ring providing night-vision illumination and visitor alert patterns on battery-powered video doorbells. IC Role / Device Role / Timing Role: Autonomous engine executes timed strobe and color-shift animations triggered by PIR or door sensor interrupts. Use Value: 6MHz SYNC output synchronizes lighting across multiple doorbell units in multi-unit dwellings for coordinated visual alerts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RGBW LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP5813BYBHR | 12-channel RGBW driver; identical DSBGA-12 package and I²C protocol; shares same 24kHz PWM and autonomous engine architecture. | Supports larger LED arrays (e.g., smart speaker light bars) but draws higher active current (0.8mA vs 0.45mA at 25.5mA/channel). | Select when expanding from 4 to 12 LEDs without changing PCB layout or firmware register map. |
| LP5810BYBHR | 4-channel linear LED driver; no boost converter; 0.5–5.5V input directly powers LEDs; lower efficiency but zero EMI from switching. | Suitable only for low-Vf LEDs (≤2.2V) or systems with stable ≥3.3V rail; lacks VOUT pass-through and autonomous animation. | Choose for EMI-sensitive medical wearables where boost noise must be eliminated, accepting reduced battery runtime. |
Compared with LP5811BYBHR, LP5813BYBHR scales channel count while maintaining pin compatibility and firmware reuse, whereas LP5810BYBHR trades boost capability for EMI-free linear operation - making LP5811BYBHR the optimal balance of integration, efficiency, and compactness for 4-LED battery-powered indicators.
Availability
LP5811BYBHR 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 authentic sourcing from Texas Instruments.
Supply support for LP5811BYBHR 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 ICs, with decades of expertise in precision LED control and low-power system solutions.
LP5811BYBHR belongs to TI's LP58xx family of autonomous RGBW LED drivers, engineered specifically for space-constrained, battery-operated consumer electronics requiring flicker-free lighting, minimal MCU interaction, and extended runtime.
FAQ
What is the minimum input voltage required to start up the LP5811BYBHR?
The LP5811BYBHR requires a minimum of 1.8V on VIN to initiate boost converter startup. Once operational, it sustains regulation down to 0.5V input - enabling deep battery discharge utilization. This 1.8V UVLO rising threshold is fixed and not programmable; the falling threshold is 0.4V, ensuring clean shutdown before brownout conditions affect system logic.
Does the LP5811BYBHR support both analog and PWM dimming simultaneously on the same LED channel?
No, the LP5811BYBHR applies either analog (dot-current DC register) or PWM (PWM register) control per channel - not both concurrently. However, global analog scaling (1-bit MC) sets the maximum current ceiling, while individual 8-bit DC and PWM values operate within that bound. This layered approach enables fine-grained brightness tuning without firmware complexity.
How does the autonomous animation engine in the LP5811BYBHR reduce MCU resource usage?
The LP5811BYBHR's autonomous animation engine executes stored lighting sequences (fade, breathe, chase) using internal state machines and timers - eliminating the need for continuous MCU PWM updates or GPIO toggling. Once configured via I²C, it runs independently, freeing the host processor for sensor processing or wireless communication in battery-constrained devices like earbuds and smartwatches.
What is the purpose of the SYNC pin on the LP5811BYBHR, and how is it used?
The SYNC pin on the LP5811BYBHR distributes or receives a 6MHz clock signal to synchronize PWM timing across multiple LP5811BYBHR devices. When configured as output, it enables seamless lighting effects (e.g., wave or ripple) across multi-unit systems like speaker arrays or smart home hubs. As input, it locks local timing to a master clock - critical for jitter-free visual coherence in professional lighting applications.
Can the LP5811BYBHR drive white LEDs with forward voltages above 3.0V?
Yes - the LP5811BYBHR's adjustable boost output (3.0V to 5.5V in 0.1V steps) fully supports standard white LEDs with Vf = 3.0–3.6V. Setting VOUT to 3.3V or 3.6V ensures sufficient headroom for current regulation across temperature and manufacturing variance, while its 110mV headroom at 25.5mA guarantees stable sink operation even at minimum VOUT.
LP5811BYBHR 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)
LP5811BYBHR FAQ
1.How can I place an order for LP5811BYBHR through Aetrix?
Please submit a Request for Quotation (RFQ) for LP5811BYBHR 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 LP5811BYBHR reliable?
The price and inventory of LP5811BYBHR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP5811BYBHR is usually 5 days.
3.What payment methods are accepted for LP5811BYBHR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP5811BYBHR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP5811BYBHR?
LP5811BYBHR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP5811BYBHR 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 LP5811BYBHR?
For technical support, including LP5811BYBHR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP5811BYBHR requirements.
6.How does Aetrix verify that LP5811BYBHR is sourced from the original manufacturer or authorized distributors?
All LP5811BYBHR 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 LP5811BYBHR meets industry standards.
7.What is the process for return or replacement of LP5811BYBHR?
All LP5811BYBHR units undergo pre-shipment inspection (PSI). If there is an issue with LP5811BYBHR, 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 LP5811BYBHR part is unused and in its original packaging.
Return procedure for LP5811BYBHR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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