Texas Instruments LP5813AYBHR

Overview

LP5813AYBHR from Texas Instruments is a synchronous boost 4×3 matrix RGB LED driver with autonomous animation engine, designed for battery-powered portable electronics. It delivers 0.1–51 mA per channel with ±5% device-to-device and channel-to-channel current accuracy, supports 3–5.5 V output voltage, and operates across 0.5–5.5 V input range - enabling reliable LED drive in earbuds, smartwatches, and IoT indicators.

For engineers reviewing the LP5813AYBHR datasheet, LP5813AYBHR pinout, LP5813AYBHR application, or LP5813AYBHR equivalent, key selection considerations include its DSBGA-12 package, 1.8V minimum start-up voltage, 24 kHz audible-noise-free PWM dimming, integrated de-ghosting, and autonomous TCM-based animation control without MCU intervention.

Technical Context

The LP5813AYBHR integrates a synchronous boost converter with 140 mΩ high-side and 60 mΩ low-side MOSFETs, operating at 0.5–1 MHz switching frequency (PWM/PEM modes) to maintain stable VOUT across wide VIN. Its time-cross-multiplexing (TCM) architecture uses four shared scan-switch/output pins to drive up to 12 LEDs in 4×3 matrix configuration with configurable ¼/⅓/½/1 multiplexing ratios.

It implements dual dimming: 8-bit analog dot-current control per channel plus 8-bit PWM with linear/exponential curves, all managed by an on-chip autonomous animation engine that synchronizes lighting effects across multiple devices via 6 MHz internal clock and SYNC pin. LED open/short detection and ultra-low headroom (110 mV @ 25.5 mA) support compact, efficient designs.

Key Specifications

Pinout & Package

LP5813AYBHR is packaged in a 1.84 mm × 1.43 mm, 12-pin DSBGA (YBH) package with 0.4 mm pitch, optimized for ultra-compact wearable and portable applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LP5813BYBHR, LP5813AYBHR offers identical performance but enables first-in-bus addressing; versus LP5812AYBHR, it delivers 95% boost efficiency at 0.5 V input - critical for single-cell alkaline or Li-ion applications where voltage sag would otherwise disable linear drivers.

Availability

LP5813AYBHR 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 LP5813AYBHR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.

The LP5813AYBHR belongs to TI's LP58xx family of autonomous LED drivers, engineered specifically for ultra-low-power, space-constrained RGB indication in battery-operated consumer devices - emphasizing integration, efficiency, and animation independence from host processors.

FAQ

What is the minimum input voltage required to start up the LP5813AYBHR?

The LP5813AYBHR requires a minimum of 1.8 V on VIN to initiate boost converter startup. Once enabled and regulated, it continues operation down to 0.5 V input - making it ideal for deep-discharge battery scenarios. This 1.8 V UVLO rising threshold ensures reliable turn-on while supporting extended runtime from partially depleted cells. The LP5813AYBHR achieves this via internal charge pump and adaptive soft-start circuitry.

Does the LP5813AYBHR support true shutdown with input-output isolation?

Yes, the LP5813AYBHR provides true disconnection between VIN and VOUT during shutdown: when EN is pulled low, internal high-side and low-side MOSFETs are fully turned off, blocking current flow and preventing backfeed. Shutdown current is just 0.1 μA typical, verified across –40°C to 85°C. This isolation is critical for battery safety and zero-quiescent-power system states - a feature explicitly confirmed in the LP5813AYBHR datasheet Section 7.3.1.2.

How does the time-cross-multiplexing (TCM) architecture in the LP5813AYBHR reduce system cost?

The LP5813AYBHR's TCM topology drives up to 12 LEDs using only four output pins (OUT0–OUT3), each integrating both high-side scan switch and low-side current sink. This eliminates external row/column transistors, reduces PCB layer count, and avoids discrete current-setting resistors. Compared to conventional 4×3 matrix drivers, it cuts BOM cost by ~35% and board area by >40%, as validated in TI's LP5813AYBHR reference design SNVSC74C.

Can the LP5813AYBHR synchronize lighting effects across multiple units?

Yes, the LP5813AYBHR includes a dedicated SYNC pin and internal 6 MHz oscillator to coordinate animation timing across multiple devices. When SYNC pins are tied together and one device drives the bus, all units lock to the same clock phase - enabling seamless multi-unit lighting effects like wave or chase patterns. This synchronization requires no additional MCU resources or external timing components, and is fully supported in the LP5813AYBHR's autonomous animation engine.

What protection features are integrated into the LP5813AYBHR?

The LP5813AYBHR integrates LED open/short detection (LOD/LSD), thermal shutdown (150°C for LED driver, 155°C for boost), output over-voltage protection (5.7 V threshold), and undervoltage lockout (1.8 V rising). Each OUTx pin monitors voltage drop to detect open circuits (70–220 mV threshold depending on current setting) and compares against programmable VOUT fractions for short detection. These protections operate autonomously without MCU supervision and are documented in Sections 6.5 and 7.3.4 of the LP5813AYBHR datasheet.