Texas Instruments TPS61050DRCT

Overview

TPS61050 from Texas Instruments is a 1.2-A synchronous boost white LED driver IC with I²C interface, operating at 2 MHz switching frequency and delivering up to 1200 mA LED current in torch/flash modes. It integrates a low-side current regulator with 250 mV sense voltage, supports voltage-regulated boost output (4.5 V / 5 V / 5.25 V), and features zero-latency FLASH_SYNC for camera flash synchronization in mobile phone applications.

For engineers reviewing the TPS61050 datasheet, TPS61050 pinout, TPS61050 application, or TPS61050 equivalent, key selection considerations include its dual-mode operation (current-sink LED driver + voltage-boost regulator), I²C programmability up to 400 kbps, integrated safety timer, open/short LED protection, and NanoFree™ DSBGA-12 packaging optimized for space-constrained camera modules.

Technical Context

The TPS61050 employs a constant-frequency, current-mode PWM control architecture with internal compensation ramp to ensure stable operation above 50% duty cycle. Its synchronous boost topology integrates NMOS power switch and NMOS rectifier, operating exclusively in continuous conduction mode to minimize EMI and eliminate switch-node ringing.

It implements dual regulation paths: a precision 250-mV LED current sense loop for torch/flash modes, and a voltage feedback loop enabling 4.5 V / 5 V / 5.25 V regulated outputs. The I²C interface controls all operational modes, LED current levels, safety timer duration, and GPIO configuration - with FLASH_SYNC providing hardware-triggered, zero-latency transition between torch and flash currents.

Key Specifications

Pinout & Package

TPS61050 is packaged in a 12-pin DSBGA (NanoFree™) package measuring 1.96 mm × 1.46 mm with bottom-side ball layout. Thermal performance is enhanced by internal PowerPAD™ connection to PGND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS61052DRCT, the TPS61050 provides GPIO versatility at the expense of hardware ENVM; compared with RT8532GQW, it trades package size and simplicity for full programmability, flash synchronization, and thermal/fault protection - making it optimal for premium mobile imaging systems.

Availability

TPS61050 is available at Aetrix Electronics and suitable for camera flash modules, portable audio power supplies, LED torch subsystems, and battery-powered IoT indicators requiring stable component supply and long-term lifecycle support.

Supply support for TPS61050 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 technologies, with decades of expertise in portable power solutions.

The TPS6105x product line was designed specifically for high-efficiency, space-constrained white LED driving in mobile imaging systems - integrating flash synchronization, safety timers, and dual-mode regulation into ultra-small packages.

FAQ

What is the primary function of the FLASH_SYNC pin on the TPS61050?

The FLASH_SYNC pin on the TPS61050 is a level-sensitive hardware trigger that enables zero-latency transition between torch and flash LED current levels. When pulled high, it commands immediate regulation to the flash current level (FC); when low, it defaults to torch current (TC). This eliminates software-induced delays, ensuring precise synchronization with camera shutter timing - a critical requirement in smartphone imaging systems using the TPS61050.

Does the TPS61050 support both LED current regulation and voltage regulation modes?

Yes, the TPS61050 supports dual operational modes via I²C register configuration. In current-regulator mode (MODE_CTRL[1:0] = 01 or 10), it delivers up to 1200 mA to white LEDs with 250 mV sense voltage. In voltage-regulator mode (MODE_CTRL[1:0] = 11), it outputs programmable 4.5 V, 5 V, or 5.25 V - disconnecting the LED path to supply other system components like audio amplifiers. The TPS61050 does not include the ENVM pin found on the TPS61052 for hardware voltage-mode activation.

What is the significance of the 250-mV LED sense voltage specification for the TPS61050?

The 250-mV LED sense voltage in the TPS61050 defines the reference voltage across the internal current-sense resistor used to regulate LED current. This low value minimizes power dissipation in the current-sink path - directly improving overall efficiency, especially at high currents. At 1200 mA, only 300 mW is lost in the sense path, enabling >96% peak efficiency in boost mode and supporting thermal integrity in compact DSBGA packaging - a key design advantage of the TPS61050 over higher-dropout alternatives.

How does the TPS61050 handle LED open-circuit and short-circuit faults?

The TPS61050 incorporates dedicated LED fault protection. During an open-circuit condition, the control loop drives VOUT upward until the overvoltage protection (OVP) activates at ~6 V, then asserts the LED FAILURE (LF) flag. In a short-circuit event, the low-side current regulator clamps output current at the programmed limit (e.g., 1200 mA), preventing excessive power dissipation while setting the same LF flag. Both conditions are detectable via I²C register reads, enabling system-level fault recovery - a robust safety feature built into the TPS61050.

What package type and thermal characteristics apply to the TPS61050?

The TPS61050 is offered exclusively in a 12-pin DSBGA (NanoFree™) package measuring 1.96 mm × 1.46 mm. Its thermal performance is characterized by RθJA = 82°C/W (junction-to-ambient, JEDEC standard) and RθJB = 35°C/W (junction-to-board), with PowerPAD™ internally connected to PGND for enhanced heat transfer to the PCB. These metrics support reliable operation up to 125°C junction temperature - essential for sustained flash operation in thermally constrained mobile enclosures using the TPS61050.