STMicroelectronics STEVAL-TLL003V1

Overview

STEVAL-TLL003V1 from STMicroelectronics is an evaluation board for the STCF02 high-power white LED flash driver IC, implementing a step-up/down current-mode converter to drive a single flash LED (2.7–5 V_F) at up to 600 mA in flash mode, with 1.8 MHz switching frequency and five logic-selectable operating modes including shutdown, NTC-enabled shutdown, torch (250 mA), flash (600 mA), and middle-flash.

For engineers reviewing the STEVAL-TLL003V1 datasheet, STEVAL-TLL003V1 pinout, STEVAL-TLL003V1 application, or STEVAL-TLL003V1 equivalent, this board provides validated PCB layout guidance, fault-safe RC-based shutdown protection, and direct interface to microcontroller enable pins for mode control in mobile camera flash subsystems.

Technical Context

The board implements the STCF02's current-mode DC-DC topology with integrated power switch, supporting both buck and boost configurations depending on input voltage relative to LED forward voltage. It uses three logic-controlled EN pins to select among five discrete operational states, each with defined current limits and thermal monitoring behavior.

A dedicated RC timing circuit provides hardware-level fault recovery by forcing shutdown if microcontroller signals stall during flash mode-preventing LED overcurrent and thermal damage. The board operates from a single Li-ion cell (2.7–4.2 V) and delivers regulated constant-current output across the full LED V_F range.

Key Specifications

Availability

STEVAL-TLL003V1 is available at Aetrix Electronics and suitable for mobile phone camera flash design, portable medical imaging devices, and industrial inspection lighting systems requiring stable component supply and rapid prototyping validation.

Supply support for STEVAL-TLL003V1 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer applications.

The STEVAL-TLL003V1 belongs to ST's LED driver evaluation platform family, engineered to accelerate development of efficient, thermally robust flash illumination subsystems for space-constrained portable electronics.

FAQ

What input voltage range does the STEVAL-TLL003V1 support?

The board operates from a single-cell Li-ion supply, accepting 2.7 V to 4.2 V input. This matches standard battery discharge profiles and enables direct integration into handheld camera modules without additional regulation stages.

How are the five operating modes selected on this board?

Modes are selected via three logic-level enable pins (EN1, EN2, EN3) tied to MCU GPIOs. Each unique 3-bit combination activates a specific mode-shutdown, NTC-enabled shutdown, torch, flash, or middle-flash-with corresponding current limits and sensing behavior.

Does the STEVAL-TLL003V1 include thermal protection for the LED?

Yes-it implements NTC-based temperature sensing in shutdown mode to measure LED junction temperature before enabling flash or torch operation, preventing thermal runaway during repeated high-current pulses.

Can the STEVAL-TLL003V1 drive multiple LEDs in series?

No-the board is configured for a single flash LED with 2.7–5.0 V_F. Driving multiple series LEDs would exceed the STCF02's output voltage compliance and require redesign of feedback and current-sense components.