STMicroelectronics STEVAL-TLL005V1

Overview

STEVAL-TLL005V1 from STMicroelectronics is a power flash demonstration board built around the STCF03 buck-boost LED driver IC and ST72F651AR6T1E microcontroller, designed to validate high-efficiency single-flash LED driving in camera phones and handheld devices under variable Li-ion battery voltage (2.7–4.2 V) and I²C-controlled current regulation (up to 1 A).

For engineers reviewing the STEVAL-TLL005V1 datasheet, STEVAL-TLL005V1 pinout, STEVAL-TLL005V1 application, or STEVAL-TLL005V1 equivalent, this board enables rapid evaluation of STCF03-based flash LED power architecture, I²C interface timing, battery-vs-USB supply mode switching, and proximity-triggered flash sequencing in compact portable systems.

Technical Context

The board implements a complete reference design for STCF03 - a synchronous buck-boost DC-DC converter with integrated 1 A switch, programmable LED current via I²C (8-bit resolution), and thermal foldback protection. It interfaces with the ST72F651AR6T1E MCU (48-pin LQFP, 16 MHz internal RC + external 12 MHz crystal) for system control, USB communication, and sensor-triggered flash activation.

Hardware partitioning includes a mother board hosting USB interface (USBDP/USBDM), reset circuitry, EEPROM (M24C02), and power management (L6920 low-dropout regulator), plus a daughter board (STEVAL-TLL004V1) containing STCF03, power inductors (10 µH), output capacitors (47 µF/16 V), and flash LED with current-sense resistors (220 Ω ×2).

Key Specifications

Availability

STEVAL-TLL005V1 is available at Aetrix Electronics and suitable for camera phone flash validation, handheld device power subsystem prototyping, and I²C-controlled LED driver qualification requiring stable component supply and documented reference schematics.

Supply support for STEVAL-TLL005V1 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 microcontrollers, power ICs, sensors, and analog/mixed-signal solutions for industrial, automotive, and consumer applications.

This board belongs to ST's STEVAL (ST Evaluation) series - purpose-built reference platforms that demonstrate real-world implementation of ST's power management and mixed-signal ICs, targeting rapid functional validation and firmware development for portable electronics.

FAQ

What is the primary function of the STEVAL-TLL005V1 board?

The STEVAL-TLL005V1 is a complete demonstration platform for the STCF03 flash LED driver IC. It validates high-efficiency, battery-voltage-independent LED current regulation using buck-boost topology, controlled by an ST72F651AR6T1E MCU via I²C. It supports both USB-powered and Li-ion battery-powered operation, with hardware for proximity-triggered flash activation and PC GUI-based configuration.

Does the board include firmware and software tools?

Yes - the board ships with a GUI installation file containing Windows drivers and a graphical user interface for configuring STCF03 registers (e.g., LED current, timeout, enable modes), monitoring status flags, and triggering flash events. Firmware for the ST72F651AR6T1E is preloaded and supports USB-to-I²C bridging, battery voltage sensing, and sensor input handling (PROX_TRIG, FLASH button).

Can the STEVAL-TLL005V1 be used without the daughter board?

No - the daughter board (STEVAL-TLL004V1) contains the STCF03 IC, power inductors, output capacitors, current-sense resistors, and flash LED. The mother board provides MCU, USB interface, EEPROM, and power conditioning but lacks the LED driver circuitry. Both boards are mechanically and electrically interdependent per the schematic and layout documentation.

Is the STCF03 on this board replaceable with another LED driver IC?

No - the STCF03 is soldered onto the daughter board and its pinout, feedback network (R12/R13/R17), and gate drive layout are specific to its buck-boost architecture and I²C register map. Substitution would require redesigning the daughter board's power stage, compensation, and firmware interface - not supported by this evaluation platform.