STMicroelectronics STEVAL-TLL012V1

Overview

STEVAL-TLL012V1 from STMicroelectronics is a 4-channel LED driver demonstration board based on the STP4CMP charge-pump IC, designed for RGB illumination and LCD display backlighting. It operates from 2.7 V to 5.5 V, supports individual ON/OFF and PWM brightness control per channel, delivers up to 30 mA per channel with ±7% absolute current accuracy and ±4% channel-to-channel mismatch, and includes thermal protection.

For engineers reviewing the STEVAL-TLL012V1 datasheet, STEVAL-TLL012V1 pinout, STEVAL-TLL012V1 application, or STEVAL-TLL012V1 equivalent, this evaluation board enables rapid validation of charge-pump-based multi-channel LED current regulation in portable display and ambient lighting systems with battery-supplied 3.3 V or 5 V rails.

Technical Context

The board implements the STP4CMP - a fixed-ratio (×1.5) switched-capacitor charge pump generating regulated current sinks - eliminating need for inductors while supporting LED forward voltages up to 3.8 V. Input voltage range (2.7–5.5 V) matches single-cell Li-ion or dual-cell alkaline supplies.

All four channels feature independent enable inputs (EN1–EN4) accepting direct logic-level or PWM signals, and individual current-setting resistors (RSET1–RSET4) allow precise, decoupled output current programming from 0 to 30 mA per channel.

Key Specifications

Availability

STEVAL-TLL012V1 is available at Aetrix Electronics and suitable for LCD backlighting, RGB status lighting, portable display modules, and handheld device UI illumination requiring stable component supply and rapid prototyping capability.

Supply support for STEVAL-TLL012V1 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 delivering intelligent power, sensing, connectivity, and microcontroller solutions for automotive, industrial, and consumer applications.

The STEVAL-TLL012V1 belongs to ST's LED driver evaluation platform family, engineered to accelerate adoption of low-EMI, inductor-free backlight and indicator solutions in space-constrained portable electronics.

FAQ

What is the primary function of the STEVAL-TLL012V1?

The STEVAL-TLL012V1 is a demonstration board that showcases the STP4CMP 4-channel charge-pump LED driver IC. Its purpose is to validate RGB illumination and LCD backlighting performance using regulated current sinks, with independent channel control, programmable current via external resistors, and thermal protection - all without requiring inductors.

Can the STEVAL-TLL012V1 drive high-forward-voltage LEDs?

Yes. The integrated STP4CMP charge pump provides a fixed ×1.5 voltage boost, enabling it to drive LEDs with forward voltages up to 3.8 V from a minimum 2.7 V supply - sufficient for common red, green, blue, and white LEDs used in portable displays and indicators.

How is brightness controlled on each channel?

Brightness is controlled per channel via PWM applied directly to the dedicated EN1–EN4 enable inputs. Each channel also supports static ON/OFF control through logic-level signals, and its output current is set independently using an external resistor (RSET), allowing analog-like dimming resolution without MCU intervention.

Is the STEVAL-TLL012V1 RoHS compliant?

Yes. As stated in the official ST data brief (Doc ID 023248 Rev 1), the STEVAL-TLL012V1 demonstration board is RoHS compliant, meeting EU Directive 2011/65/EU requirements for restriction of hazardous substances in electrical and electronic equipment.