Texas Instruments TPS61050YZGR

Overview

TPS61050YZGR 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 flash mode. It integrates a low-side current regulator with 250 mV sense voltage, supports torch/flash dual-mode operation, and features zero-latency FLASH_SYNC strobe input for camera synchronization. Used in smartphone LED flash systems requiring precise current control and fast turn-on.

For engineers reviewing the TPS61050YZGR datasheet, TPS61050YZGR pinout, TPS61050YZGR application, or TPS61050YZGR equivalent, key selection considerations include its 12-pin DSBGA package, I²C-compatible 400 kbps interface, 250-mV LED current sense threshold, integrated safety timer, and hardware TX-masking capability unique to the TPS61050 variant.

Technical Context

The TPS61050YZGR implements a constant-frequency, current-mode PWM synchronous boost converter with integrated NMOS switch and synchronous rectifier, operating exclusively in continuous-conduction mode. Its control loop combines an error amplifier, sawtooth ramp compensation, and 2-MHz oscillator to stabilize duty cycle above 50%.

It embeds dual regulation paths: a linear low-side current sink (250 mV V_LED) for LED driving and a voltage-regulated boost output (4.5 V / 5 V / 5.25 V) selectable via I²C. The GPIO pin functions as configurable logic input or open-drain output, while FLASH_SYNC enables hardware-triggered zero-latency transition between torch and flash current levels.

Key Specifications

Pinout & Package

TPS61050YZGR is housed in a 12-pin DSBGA (Die Size Ball Grid Array) package measuring 1.96 mm × 1.46 mm, with bottom-side solder balls and internal PowerPAD™ connected to PGND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS61052YZGR, the TPS61050YZGR provides exclusive GPIO flexibility and zero-latency FLASH_SYNC for camera timing, whereas RT8532GQW trades digital control for analog simplicity and higher switching frequency-making each optimal for distinct system architecture priorities.

Availability

TPS61050YZGR is available at Aetrix Electronics and suitable for smartphone camera flash systems, mobile torch lighting, audio amplifier power supplies, and low-light dimming applications requiring stable component supply and long-term production support.

Supply support for TPS61050YZGR 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 experience in portable power solutions.

The TPS6105x product line was designed specifically for high-efficiency, space-constrained white LED driving in mobile imaging systems-integrating boost conversion, current regulation, I²C control, and camera-synchronized timing in a single chip.

FAQ

What is the primary function of the FLASH_SYNC pin on the TPS61050YZGR?

The FLASH_SYNC pin on the TPS61050YZGR is a level-sensitive hardware strobe input that enables zero-latency switching between torch and flash LED current levels. When driven HIGH, it commands immediate transition to flash current (up to 1200 mA); when LOW, it reverts to torch level. This bypasses I²C command latency, ensuring precise synchronization with camera shutter timing-critical for accurate exposure in smartphone imaging systems using the TPS61050YZGR.

How does the TPS61050YZGR achieve high efficiency in LED current regulation?

The TPS61050YZGR achieves high efficiency primarily through its 250-mV LED current sense voltage, which minimizes power dissipation in the low-side current regulator path. Combined with synchronous rectification, 2-MHz fixed-frequency PWM control, and continuous-conduction mode operation, this enables up to 96% peak efficiency. Real-world measurements show >90% efficiency across 300–1200 mA LED loads at 3.6-V input, directly attributable to the low dropout design of the TPS61050YZGR's current-sense architecture.

Can the TPS61050YZGR operate as a standard voltage regulator, and if so, what output voltages are supported?

Yes, the TPS61050YZGR can operate as a voltage-regulated boost converter by configuring MODE_CTRL[1:0] = 11 and setting OV[1:0] bits via I²C. Supported output voltages are 4.5 V, 5 V, and 5.25 V-programmable in real time without changing external components. In this mode, the LED current regulator is disabled, VOUT supplies auxiliary loads (e.g., audio amplifiers), and the TPS61050YZGR maintains tight regulation (<±3%) across load and input variations.

What protection features are integrated into the TPS61050YZGR?

The TPS61050YZGR integrates open-LED and short-LED detection, overtemperature shutdown (160°C typical), undervoltage lockout (2.4 V typical), output overvoltage protection (6.25 V max), and programmable flash safety timer. Upon fault detection, it asserts the LED FAILURE flag, limits output current/voltage, and maintains safe operating conditions-ensuring robustness in handheld devices where mechanical stress or thermal cycling may compromise LED integrity during TPS61050YZGR operation.

Is the GPIO pin on the TPS61050YZGR compatible with standard logic voltage levels?

Yes, the GPIO pin on the TPS61050YZGR supports standard CMOS logic thresholds: V_IL ≤ 0.4 V and V_IH ≥ 1.2 V, compatible with 1.8-V and 3.3-V host interfaces. It can be configured as an input (with 400-kΩ internal pulldown) or open-drain output (I_OL = 8 mA, V_OL ≤ 0.3 V). This flexibility allows direct interfacing with baseband processors or PMICs without level-shifting-enhancing system integration for designs utilizing the full feature set of the TPS61050YZGR.