Texas Instruments LP5813BYBHR

Overview

LP5813BYBHR from Texas Instruments is a synchronous boost 4×3 matrix RGB LED driver with autonomous animation engine, designed for battery-powered portable devices. It supports 0.5V–5.5V input, delivers 3V–5.5V regulated output via integrated 1.6A valley-current-limited boost converter, and drives up to 12 LEDs (e.g., 4 RGB) using time-cross-multiplexing (TCM) with ¼–1× ratios. Each of its four constant-current sinks provides 0.1–51mA with ±5% channel-to-channel accuracy and ultra-low 110mV headroom at 25.5mA - enabling compact, low-power LED indication in space-constrained wearables.

For engineers reviewing the LP5813BYBHR datasheet, LP5813BYBHR pinout, LP5813BYBHR application, or LP5813BYBHR equivalent, this page delivers verified technical context on TCM topology, autonomous PWM animation control, I²C-addressable variants (0x28), true input-output disconnection in shutdown, and real-world power efficiency (95% @ 4.2V→5.0V/300mA) - all critical for low-voltage, multi-LED system integration.

Technical Context

The LP5813BYBHR implements a quasi-constant-frequency synchronous boost converter operating at 1MHz (VIN > 1.5V) or 0.5MHz (VIN < 1V), with adaptive constant-on-time valley-current control for stable regulation across wide input ranges. Its time-cross-multiplexing architecture integrates high-side scan FETs and low-side current sinks per output (OUT0–OUT3), enabling 4-pin control of 12 LED dots without external row/column drivers.

Autonomous animation is executed by on-chip engines per LED channel, supporting individual 8-bit dot-current (DC) and 8-bit PWM configuration with linear/exponential curves, plus synchronized multi-device lighting via 6MHz internal oscillator and SYNC pin. The device includes integrated de-ghosting, LED open/short detection (70–220mV LOD threshold), and thermal shutdown (150°C/155°C for LED/boost sections).

Key Specifications

Pinout & Package

LP5813BYBHR uses a 12-pin DSBGA package (1.84mm × 1.43mm, 0.4mm pitch) optimized for ultra-compact wearable PCBs. The package supports solder-ball reflow and is compatible with standard micro-BGA assembly processes.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RGB LED driver applications.

Compared with LP5813AYBHR, LP5813BYBHR offers identical performance but distinct I²C addressing for multi-device coordination; versus LP5812BYBHR, it adds synchronous boost, 0.5V start-up, and true input-output isolation - making it essential for single-cell battery applications demanding extended runtime and flexible LED forward voltage support.

Availability

LP5813BYBHR is available at Aetrix Electronics and suitable for portable electronics, wearable UIs, and IoT indicator systems requiring stable component supply, long-term lifecycle support, and guaranteed authentic sourcing from Texas Instruments.

Supply support for LP5813BYBHR 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 LP5813BYBHR belongs to TI's LP58xx family of autonomous LED drivers, engineered specifically for ultra-low-power, space-constrained consumer electronics where battery life, compact form factor, and rich lighting effects are critical design requirements.

FAQ

What is the I²C address of LP5813BYBHR and how is it determined?

The LP5813BYBHR has a fixed I²C slave address of 0x29 (binary 0101001). This is set by the "Bit 4 = 0, Bit 3 = 1" configuration in its DSBGA package variant, as defined in TI's Device Comparison table. Up to four LP5813 devices (AYBHR/ BYBHR/CYBHR/DYBHR) can coexist on the same I²C bus using addresses 0x28–0x2B. No external address pins or pull-ups are required - the address is hardwired by silicon version.

Does LP5813BYBHR support true shutdown with input-output isolation?

Yes. When the EN pin is driven below 0.42V, LP5813BYBHR enters full shutdown mode: the boost converter halts, internal switches disconnect VIN from SW and VOUT, and total current drops to 0.1μA (typ.). This prevents any leakage path from battery to LED strings or external loads - a critical feature for zero-quiescent-power portable applications.

How does the time-cross-multiplexing (TCM) topology in LP5813BYBHR differ from standard multiplexing?

Unlike conventional row/column multiplexing, LP5813BYBHR's TCM uses time-interleaved scanning across all four OUTx pins to activate individual LEDs in a 4×3 matrix without dedicated row drivers. Each OUTx pin integrates both a high-side scan FET and low-side current sink, enabling per-LED current control and eliminating ghosting via hardware de-ghosting logic - reducing external component count and PCB area by >40% versus discrete solutions.

What is the minimum input voltage required for LP5813BYBHR to start up and sustain operation?

LP5813BYBHR requires ≥1.8V at VIN to initiate boost converter startup (UVLO rising threshold). Once running, it sustains operation down to 0.5V input - enabling use with deeply discharged single-cell Li-ion or NiMH batteries. Below 0.4V (UVLO falling threshold), the device shuts down completely. Soft-start completes in 450μs (typ.) from EN assertion to 3V VOUT regulation.

Can LP5813BYBHR drive LEDs directly from a 3.3V supply without enabling the boost converter?

Yes. When VIN ≥ configured VOUT (e.g., VOUT = 3.0V), LP5813BYBHR automatically enters pass-through mode: the boost converter disables, and VOUT is internally connected to VIN. This bypasses switching losses and improves efficiency - ideal for systems with stable 3.3V rails powering mid-Vf RGB LEDs. VOUT remains regulated and available as a system power rail even in pass-through mode.