Texas Instruments TPS61040EVM-001

Overview

TPS61040EVM-001 from Texas Instruments is an evaluation module built around the TPS61040DBV SOT-23-5 boost converter IC, configured to deliver 18 V at 20 mA for LCD bias supply from a single-cell Li-ion battery (3–4.2 V input). It supports adjustable output up to 28 V via feedback resistor network and features analog voltage or potentiometer-based contrast control.

For engineers reviewing the TPS61040EVM-001 datasheet, TPS61040EVM-001 pinout, TPS61040EVM-001 application, or TPS61040EVM-001 equivalent, this EVM serves as a validated reference design for low-power LCD bias generation, soft-start sequencing, and efficiency optimization in portable display power systems.

Technical Context

The TPS61040EVM-001 implements a discontinuous-conduction-mode (DCM) boost topology with internal 450 mA switch, fixed 1.233 V feedback reference, and three-stage soft-start to limit inrush current. Input voltage range is 1.8 V to 6 V, optimized for 3–5 V operation.

It integrates a dedicated ADJ interface (J3) enabling dual-mode output voltage adjustment: variable resistance between FB and GND, or analog control voltage applied through a series resistor to the FB node - both preserving regulation accuracy while supporting dynamic LCD contrast tuning.

Key Specifications

Availability

TPS61040EVM-001 is available at Aetrix Electronics and suitable for LCD bias supply, portable display power validation, and low-voltage boost converter reference design requiring stable component supply and documented test data.

Supply support for TPS61040EVM-001 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 company specializing in analog, embedded processing, and power management technologies, with decades of leadership in power conversion ICs and evaluation platforms.

The TPS61040EVM-001 belongs to TI's Portable Power Evaluation Module family, designed specifically to accelerate development of compact, high-efficiency DC/DC solutions for battery-powered displays and portable instrumentation.

FAQ

What is the primary function of the TPS61040EVM-001?

The TPS61040EVM-001 is an evaluation module that demonstrates the TPS61040DBV boost converter IC in a complete, tested circuit delivering 18 V at 20 mA for LCD bias applications. It is not a production-ready power supply but a development tool for validating performance, layout, and adjustment methods before custom design.

Can the TPS61040EVM-001 operate from a 1.8 V input?

Yes - the TPS61040EVM-001 is rated for 1.8 V to 6 V input, though it is optimized for 3–5 V operation. At 1.8 V, output current capability decreases depending on output voltage setting and load; full 20 mA at 18 V is not guaranteed below 2.5 V input per test data and EVM documentation.

How is output voltage adjusted on the TPS61040EVM-001?

The TPS61040EVM-001 provides two adjustment methods via J3: (1) a variable resistor between J3-1 (FB node) and ground, or (2) an analog control voltage applied through a series resistor to J3-1. Both methods modify the feedback divider ratio while maintaining regulation integrity per the TPS61040's 1.233 V reference.

What is the role of JP1 on the TPS61040EVM-001?

JP1 is the enable/disable jumper for the TPS61040EVM-001. Connecting the center pin to "ON" applies input voltage to the EN pin, activating the converter; connecting to "OFF" pulls EN to GND, disabling switching. Leaving EN floating results in undefined operation - JP1 ensures deterministic control per EVM User's Guide Section 2.1.

Is the TPS61040EVM-001 FCC-certified for commercial use?

No - the TPS61040EVM-001 is explicitly designated for engineering development or evaluation only. As stated in the EVM IMPORTANT NOTICE, it is not regulatory compliant (FCC, CE, UL), lacks end-product safety protections, and is intended solely for lab testing under controlled conditions per SLVU065 User's Guide.